GPT-3000 - manual de serviço.pdf

7/27/2019 GPT-3000 - manual de servio.pdf

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GPT-3000 SERIES

PULSE TOTAL STATION

ISSUED............... AUG. 2004

REVISED ............REPAIR MANUAL

TOPCON CORPORATION

Printed in Japan


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This document contains proprietary and confidential information of

Topcon Corporation, and its description is protected under copyright

law and international conventions.

Any unauthorized use, duplication, reproduction, modification,

disclosure, distribution or transfer of any part of this document is

strictly prohibited.

NOTICE

Copyright 2004 Topcon Corporation, All rights reserved.


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LASER SAFETY

Laser Safety

Distance Measurement

GPT-3000 series uses the invisible laser beam. The GPT-3000 series are manufactured and sold in accordance

with "Performance Standards for Light-Emitting Products" (FDA/BRH 21 CFR 1040) or "Radiation Safety of

Laser Products, Equipment Classification, Requirements and Users Guide" (IEC Publication 825) provided on

the safety standard for laser beam.

As per the said standard, the GPT-3000 series is classified as "Class 1 (l) Laser Products".

Laser pointer and Plumb Laser (Plumb laser is supplied for certain markets.)

GPT-3000 series plumb laser and laser pointer use the visible laser beam. The GPT-3000 series plumb laser and

laser pointer are manufactured and sold in accordance with "Performance Standards for Light-Emitting Prod-

ucts" (FDA/BRH 21 CFR 1040) or "Radiation Safety of Laser Products, Equipment Classification, Require-

ments and Users Guide" (IEC Publication 825) provided on the safety standard for laser beam.

As per the said standard, the GPT-3000 series plumb laser type is classified as "Class 2 (II) Laser Products".

Do not stare into the laser beam from apertures. Disassemble and repair this instrument according to the specified procedures; otherwise, the laser radiation

which exceeds the CLASS 2 may affect the human body.

CAUTION: Use of controls or adjustment or performance of procedures other than those specified

herein may result in hazardous radiation exposure.

Labels

Symbol mark while the laser is emitting.

The following symbol mark will appear at the right side of the second line.

Symbol mark


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CONTENTS

Page

LASER SAFETY

1. INTRODUCTION ........................................................................................................................... 1-11-1 Introduction ................................................................................................................................. 1-1

1-2 How to Use This Manual ............................................................................................................ 1-2

2. PRODUCT OUTLINE ................................................................................................................... 2-12-1 Nomenclature .............................................................................................................................. 2-1

2-2 Display ........................................................................................................................................ 2-3

2-3 Operating Key ............................................................................................................................. 2-4

2-4 Star Key Mode ............................................................................................................................ 2-7

2-5 Serial Signal RS-232C Connector .............................................................................................. 2-8

2-6 Prism Mode and Non-prism Mode ............................................................................................. 2-9

3. PRINCIPLE ..................................................................................................................................... 3-13-1 Principle of Angular Measurement ............................................................................................. 3-1

3-2 Principle of Distance Measurement ............................................................................................ 3-4

3-3 Distance Measurement System Optical Arrangement ................................................................ 3-6

4. INSPECTION .................................................................................................................................. 4-14-1 Inspection Procedure ................................................................................................................... 4-1

4-2 Theodolite System Accuracy Inspection .................................................................................... 4-2

4-3 Telescope (EDM) System Accuracy Inspection ......................................................................... 4-5

4-4 Error Code Table ........................................................................................................................ 4-19

5. DISASSEMBLY PROCEDURE ................................................................................................. 5-15-1 Instrument Disassembly Procedure ............................................................................................ 5-1

5-2 Telescope (EDM Unit) Disassembly Procedure ......................................................................... 5-17

5-3 Left Cover Disassembly Procedure (Bluetooth Type) ................................................................ 5-34

6. TROUBLE SHOOTING ............................................................................................................... 6-16-1 Trouble Shooting Flow Chart ..................................................................................................... 6-1

6-2 Trouble Shooting of Angular Measurement System Problem Unit ............................................ 6-15

7. EACH UNIT REPLACEMENT PROCEDURE ..................................................................... 7-17-1 Angular Measurement System Unit Replacement Procedure ..................................................... 7-1

7-2 EDM System Unit Replacement Procedure ................................................................................ 7-3

7-3 Other Units Replacement Procedure ........................................................................................... 7-4

8. REPAIR OUTLINE ........................................................................................................................ 8-18-1 Repair Outline ............................................................................................................................. 8-1

8-2 Setting and Adjustment Modes ................................................................................................... 8-2
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9. ANGULAR MEASUREMENT READING SYSTEM REPAIRS ....................................... 9-19-1 How to Use the Angular Measurement System Unit Positioning Tools .................................... 9-1

9-2 Angular Measurement System Unit Installation and Adjustment .............................................. 9-9

9-3 Horizontal Angle Round Rotation Check ................................................................................... 9-23

10. PLATE SYSTEM REPAIRS ..................................................................................................... 10-110-1 Nomenclature .............................................................................................................................. 10-110-2 Angular Measurement Digital System Repairs .......................................................................... 10-2

10-3 Setting of Integral Time .............................................................................................................. 10-4

10-4 Check for Bluetooth Communication (GPT-3000W only) ......................................................... 10-6

11. TELESCOPE (EDM) SYSTEM REPAIRS ........................................................................... 11-111-1 Nomenclature .............................................................................................................................. 11-2

11-2 Nomenclature and Functions of Units ........................................................................................ 11-3

11-3 EDM General Adjustment .......................................................................................................... 11-4

11-4 Adjustment of Optical Axis on Optical Receiving Side ............................................................. 11-18

11-5 Adjustment of Optical Axis on Optical Emitting Side ............................................................... 11-2111-6 Adjustment of Laser Pointer Optical Axis .................................................................................. 11-24

11-7 Adjustment of Point Guide ......................................................................................................... 11-25

12. INSTALLATION OF SOFTWARE .......................................................................................... 12-112-1 How to Check Version ................................................................................................................ 12-1

12-2 Installation of Main Software

(New Software of PC Old Software of Instrument) .............................................................. 12-2

12-3 Installation of Main Software

(New Software of Instrument Old Software of Instrument) ................................................. 12-5

13. ADJUSTMENT MODE .............................................................................................................. 13-113-1 Normal and Reverse Collimation Vertical Zero-point Adjustment ............................................ 13-1

13-2 EDM Instrument Constant Input ................................................................................................. 13-3

14. APPENDICES .............................................................................................................................. 14-114-1 EDM Cable Arrangement ........................................................................................................... 14-1

14-2 Repair Tool List .......................................................................................................................... 14-3

14-3 Adhesives and Application Locations ........................................................................................ 14-4

14-4 Lubricants and Application Locations ........................................................................................ 14-5

14-5 Specifications .............................................................................................................................. 14-7

14-6 Precaution When Charging or Storing Batteries ......................................................................... 14-11
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1-1 Confidential : duplication and reproduction prohibited

1. INTRODUCTION

1-1 Introduction

The GPT-3000 series has the following features as a successive model of the GPT-2000 series.

1) Small diameter distance measurement light

Because the diameter of the distance measurement light is smaller, the measurement with a pin point is

possible and no error is displayed.

2) The measured distance is extended.

Non-prism mode: GPT-2003....150m GPT-3003....250m

* The measured distance is changed depending on the atmospheric conditions.

3) Laser pointer function

In addition to the light source of the distance measurement, another light source (laser pointer) is installed.

So a clear spot light is emitted. (It can be turned on/off optionally.)


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1-2Confidential : duplication and reproduction prohibited

1-2 How to Use This Manual

This manual describes the following points.

1) Replacement of parts :

The parts must be replaced by units (electrical, mechanical and optical units).

2) Replacement procedure of parts :

Necessary disassembly procedures and adjustments after replacement are shown with illustrations and

flow charts.

Dont perform repairs with other parts, units or methods (procedures, tools or others) except those mentioned

in the manual and parts list. An unallowable repair not only hinders a normal repair work but also causes

another trouble.


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2. PRODUCT OUTLINE

2-1 Nomenclature

Handgrip locking screw

Objective lens

Laser aperture

Point guide

Display unit

(Only for GPT-3002/3003/3005)

Circular level

Adjustment screw for circular level

Instrument center mark

Optical plummet telescope

Tribrach fixing lever Base

Leveling screw

Laser pointer

(Optical plummet telescopetype only)

Hand grip


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* The position of vertical motion clamp and Vertical tangent screw will differ depending on the market.

Sighting collimator

Telescope focusing knob

Telesope grip

Telescope eyepiece

* Vertical motion clamp

* Vertical tangent screw

Plate level

Display unit

Battery locking lever

On-board battery BT-52QA

Instrument center mark

Horizontal motion clamp

Power supply connector

Serial Signal connector

Horizontal tangent screw


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2-2 Display

The display uses a graphic LCD which has 4 lines and 20 characters per line. In general, the upper 3 lines

indicate mainly the measured data, and the bottom line indicates the soft key function which changes with the

measuring modes.

Example

Display marks

Display Contents Display Contents

V V-angle * EDM working

HR H-angle right m Meter unit

HL H-angle left f Feet unit/Feet and inch unit

HD Horizontal distance NP Switches non-prism mode or prism mode

VD Relative elevation Laser emitting mark

SD Slope distance

N N coordinate

E E coordinate

Z Z coordinate

V : 9010'20"HR: 12030'40"

0SET HOLD HSET P1

Angle measurement mode

V-angle : 90 10' 20"H-angle : 120 30' 40"

HR: 12030'40"HD* 65.432mVD: 12.345mMEAS MODE NP/P P1

Distance measurement mode

Horizontal-angle : 120 30' 40"Horizontal distance : 65.432mRelative elevation : 12.345m

HR: 12030'40"HD* 123.45 fVD: 12.34 f

MEAS MODE NP/P P1

Horizontal-angle : 120 30' 40"Horizontal distance : 123.45ftRelative elevation : 12.34ft

HR: 12030'40"HD* 123.04.6fVD: 12.03.4fMEAS MODE NP/P P1

Horizontal-angle : 120 30' 40"Horizontal distance : 123ft4in6/8inRelative elevation : 12ft3in4/8in

Feet unit Feet and inch unit


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2-3 Operating Key

Key Name of Key Function

Star key

Star key mode is used for each presetting or displaying as follows.

1 Contrast of the display 2 Reticle illumination 3 Back Light

4 Non-prism/Prism 5 Laser pointer 6 Laser plummet7 Tilt correction 8 Point guide 9 Set audio mode

Coordinate meas. key Coordinate measurement mode

Distance meas. key Distance measurement mode

ANG Angle meas. key Angle measurement mode

MENU Menu keySwitches menu mode and normal mode. To set application measure-

ments and adjust in the menu mode.

ESC Escape key

Returning to the measurement mode or previous layer mode from the

mode set.

To be DATA COLLECTION mode or LAYOUT mode directly from

the normal measurement mode.

It is also possible to use as Record key in normal measurement mode.

To select function of Escape key, see Chapter 16 "SELECTING

MODE".

ENT Enter key Press at the end of inputting values.

POWER Power source key ON/OFF of power source

F1-F4Soft key

( Function key)Responds to the message displayed.


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2-3-1 Function key (Soft key)

The Soft Key message is displayed at the bottom line of display. The functions are according to the displayed

message.

Angle measurement

Distance measurement mode

Page Soft key Display mark Function

1

F1 0SET Angle of Horizontal is set to 0 00' 00"

F2 HOLD Hold the horizontal angle.

F3 HSET Sets a required horizontal angle by entering numerals.

F4 P1 The function of soft keys is shown on next page (P2).

2

F1 TILTSetting Tilt Correction

If ON, the display shows tilt correction value.

F2 REP Repetition angle measurement mode

F3 V% Vertical angle percent grade (%) mode


3

F1 H-BZ Sets the buzzer sound for every horizontal angle 90.

F2 R/L Switches R/L rotation of horizontal angle.

F3 CMPS Switches the COMPASS ON/OFF of vertical angle.



1

F1 MEAS Start measuring.

F2 MODE Sets a measuring mode, Fine/Coarse/Tracking.

F3 NP/P Switches non-prism mode or prism mode.


2

F1 OFSET Select Off-set measurement mode.

F2 S.O Select stake out measurement mode.

F3 S/A Select set audio mode.


3F2 m/f/i Switches meter, feet or feet and inch unit.


V : 9419'00"HR: 17202'40"--- m/f/i --- P3

V : 9419'00"HR: 17202'40"

H-BZ R/L CMPS P3

V : 9419'00"HR: 17202'40"

TILT REP V% P2

V : 9010'20"

HR: 12030'40"0SET HOLD HSET P1

V : 9419'00"HR: 17202'40"

OFSET S.O S/A P2

HR: 12030'40"

HD*[r]


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Coordinate measurement mode


1

F1 MEAS Start measuring.

F2 MODE Sets a measuring mode, Fine/Coarse/Tracking.

F3 NP/P Switches non-prism mode or prism mode.F4 P1 The function of soft keys is shown on next page (P2).

2

F1 R.HT Sets a prism height by input values.

F2 INSHT Sets an instrument height by input values.

F3 OCC Sets an instrument coordinate point by input values.


3

F1 OFSET Select Off-set measurement mode.

F2 m/f/i Switches meter, feet or feet and inch unit.

F3 S/A Select set audio mode.



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2-4 Star Key Mode

Press the ( ) key to view the instrument options.

The following instrument options can be selected from the ( ):

1.Adjustment of the contrast of the display (0 to 9 steps) [ or ]

2.Adjustment of the reticle illumination (1 to 9 steps) [ or ]

3.Turn the backlight of the display ON / Blink / OFF.

4.Select Non-prism mode / Prism mode.

5.Turn the Laser pointer option ON/OFF.

6. Turn the Laser plummet option ON/OFF. (Only for the laser plummet type)

7.Setting Tilt Correction

8.Turn the Point Guide option ON/OFF.

9.S/A (set audio) mode

Note: Star key mode does not function when the same function as the function assigned to the star key

mode is performed from the main routine.

Key Displaymark

Function

F1 B.LT Turn the backlight of the display ON/OFF.

F2 NP/P Non-prism mode / Prism mode selection

F3 L.P. Turn the Laser pointer option ON / Blink / OFF.

F4 L.PL Turn the Laser plummet option ON/OFF. (Only for the laser plummet type)

F1 --- ---

F2 TILTSetting Tilt Correction

If ON, the display shows tilt correction value.

F3 P.G. Turn the Point Guide option ON/OFF.

F4 S/AThe light acceptance quantity level for the EDM (SIGNAL), the atmospheric cor-

rection value (PPM) and correction value of prism constant (PSM) are displayed.

or CONT Adjust the contrast of the display (0 to 9 steps).

or RTCLAdjust the Reticle Illumination (1 to 9 steps).

ON/OFF of the reticle illumination is linked with ON/OFF of the backlight.

V : 9010'20"HR: 2030'40"

0SET HOLD HSET P1

CONT:5 RTCL:5B.LT NP/P L.P. L.PL.

CONT:5 RTCL:5--- TILT P.G. S/A

Press the star ( ) key.

Press the star ( ) key.


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2-5 Serial Signal RS-232C Connector

The serial signal connector is used for connecting the GPT-3000 series with a computer or TOPCON Data

Collector, which enables the computer to receive measured data from the GPT-3000 series or to send preset

data of horizontal angle, etc. to it.

The following data will be outputted at each mode.

The display and the output at the coarse mode are the same as the contents above. At the tracking mode, the displayed distance data only is outputted.

The details necessary for the connection with the GPT-3000 Series are obtained from its Interface Manual

which is optionally available. Please refer to the manual.

Mode Output

Angle mode ( V, HR or HL) ( V in percent) V, HR (or HL)

Horizontal distance mode (HR, HD, VD) V, HR, HD, VD

Slope distance mode (V, HR, SD) V, HR, SD, HD

Coordinate mode N, E, Z, HR (or V, H, SD, N, E, Z)


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2-6 Prism Mode and Non-prism Mode

In GPT-3000 series, the distance measurement will be done using invisible pulse laser beam emitted from

pulse laser diode. You can select measurement mode between Prism mode which is collimating a prism and

Non-prism mode that is collimating a target object except prism.

Regardless of whether the laser pointer is used, measurement is possible with both the non-prism mode and

the prism mode. That is, when the GPT-3000 is used in the open air, in an urban area, etc., the laser pointer

can be stopped and distance measurement is then conducted, making it possible to prevent the laser light

from hitting a third party.

When using a reflection sheet, measure with the prism mode.

For measurement with a prism, be sure to measure with the prism mode. If you measure with the non-prism

mode, accuracy cannot be guaranteed.

Non-prism mode enables all distance measurements such as Distance measurement, Coordinate measure-

ment, Offset measurement and Layout.

To switch over Prism mode to Non-prism mode or contrary, press the [NP/P] soft key in each measurementdisplay. [NP] of Non-prism mode indicator will be shown at the right corner of the display in Non-prism

mode measurement.

Changing mode shall be done before measurement.

Example

It is possible to set Non-prism mode for distance measurement during the power on time. Refer to 8-2-2

Parameter setting mode 2 to set the option.

If happened collimating the near distance prism has happend in Non-prism mode, measurement will not be

done because of too much light.

In Non-prism mode, the distance less than 1m and 400m or more is not displayed.

HR: 12030'40"HD* 65.433 m NPVD: 12.345 m

MEAS MODE NP/P P1

N: 120.456 mE: 34.567 m NPZ: 12.345 m

MEAS MODE NP/P P1

Distance measurement mode Coordinate measurement mode

Non-prism mode indicator

To change the mode, press the [NP/P] soft key in each measurement.


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3. PRINCIPLE

3-1 Principle of Angular Measurement

(1) Principle

The pattern of the scale is divided into 1260 lines of equal pitch. The line width of the signal R is stable.

The line width of the signals A, B and C is modulated according to the different cycles. (Fig. 1)

The signals are arranged in the order of R , A, B and C. When the pattern of the scale is projected,

the waveform is generated on the CCD. (Fig. 2) Obtain an integral value by every four waveform lines and

find out the line whose change is the smallest. It is R because the R width is stable. When you have

found out R, the next is A and then B and C . Therefore the frequency of A, B and C can be

obtained. (Fig. 3)

First, carry out Fourier transformation (DFT) for the equal-pitch signals to execute the accurate calculation of

1 pitch (1028 seconds) or less. Secondly, arrange the waveforms of the frequency for the A, B and C, obtain

each phase and, by combining the phases, obtain the angle of the block including A, B and C. Thirdly, obtain

the angle of the pitch unit by using the kind of the pattern including the reference position. Finally, combine

the accurate and rough calculations and arrange the digits to obtain the angular measurement value.

LED

MirrorCCD

Scale

(V)-angular measurement reading unit (H)-angular measurement reading unit

LED

Scale

CCD


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(2) Angular measurement electrical system block diagram

InternalBattery

Ni-MH

2700mA/H

Externalpower

supply

External

communicationUnit

Laser

plummet

Unit

DisplayUnit

(Reverse)

CPU

Unit

Powersupply

(3.3

V,

5V)

CPU

G.

A

Memory

DisplayUnit

(Normal)

EDM

Angle

Measureme

nt

UnitH1

Angle

Measurement

UnitH2

V1-CCD

Un

it

V2-CCD

Un

it

TiltUnitA

TiltUnitB


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3-2 Principle of Distance Measurement

(1) Principle

Let the instrument face the objective (a normal prism is usable) and emit a light (laser beam). The instrument

receives the reflected light and measures its time lag (phase difference). Consequently the distance to the

objective can be measured.

A difference from the conventional light wave telemeter (EDM) is as follows: this instrument does not modu-

late the emitted light but carries out the measurements equal to the long/short wavelength (accurate measure-

ment and rough measurement) at the same time.

The luminous flux emitted outside is a pulse with exceedingly small width.

The instrument emits a pulse light to the objective.

The instrument amplifies the reflected light and generates the receiving timing waveform. According

to the timing, the sine waveform of TCXO is sampled and so the low frequency beat signal can be

obtained. At the same time, the instrument measures the count value for the time interval which is

obtained by the emitting and receiving timing of the pulse light.

A/D conversion is done for the beat signal of . The converted value and the above count value arestored in the memory.

Fourier transformation is executed for the data for which A/D conversion has already been done and

the accurate measured distance value is obtained.

CPU arranges the digits for the above count value (rough measurement) and the accurate measurement

to calculate the distance value.

The procedures of ~ are done in the outside and inside light paths and, in consideration of the

calculated differences, the final measured distance value is obtained.

1

2

3 2

4

5

6 1 5


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(2) Distance measurement system block diagram

SYNTH

DRIVER

PLD

D-OSC

UNIT

PLD

DRIVER

UNIT

AMPUNIT

CNTR

BPF

S/H

COMP

AMP

HEADAMP

MAINAMP

APD

CPU

A/D

TCXO


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3-3 Distance Measurement System Optical Arrangement

6

14

15

20

16

8

10

15

9

17 18 19

543

12 13

21

22

23

24

2

1 7 11

PLD

LD

APD

Chopper


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Telescope (EDM) system

No. Name Function on mechanism Function on adjustment

1 Objective lens EDM focus adjustment

2 Dichroic prism Distributes the light path for the distance mea-surement (optical receiving) system and the

collimation system.

EDM optical axis verticaladjustment

3 Internal lens Collimation system focus adjustment

4 Porro prism Forms an image.

5 Reticle Imaging screen in the collimation system EDM optical axis reverse

adjustment

6 Eyepiece lens Optical system for observing the collimation

system

7 Mirror(Optical emitting pipe)

Aligns the collimation axis with the distancemeasurement (optical emitting) system.

8 Relay lens Changes the magnification of the distance

measurement system.

9 Mirror (LP) Aligns the laser pointer optical axis with the

distance measurement system.

10 Condenser lens (LP) Condenses the LP light.

11 Reference-ND Adjusts the light intensity for the inside light

path.

12 Reference lens

13 Condenser lens

(P-optical emitting)

Generates the prism distance measurement

light.

14 Mirror

(P-optical emitting)


light.

15 Optical emitting fiber Generates the prism distance measurement

light.

16 Condenser lens

(Optical emitting fiber)


light.

17 Random phase plate Adjusts the irregular light intensity to be uni-

form.18 Rhomb prism Changes the light path for Prism/Non-prism.

19 Anamorphic prism Forms the beam.

20 Condenser lens (PLD)

21 IR filter Removes the unnecessary light.

22 Circular Adjusts the light intensity for the distance

measurement.

23 Doughnut lens

24 Optical receiving fiber


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4. INSPECTION

4-1 Inspection Procedure

Before starting repairs, use the following procedure to doublecheck the problem location. Before the instru-

ment is disassembled, carry out :

4-2 Theodolite System Accuracy Inspection

4-3 Telescope (EDM) System Accuracy Inspection

When you have located the problem, proceed with disassembly and replacement of the problem unit as

described in the repair manual.

Level the instrument.

Inspection/repair is ended.

Shipment

Theodolitesystem accuracy

inspection

EDMsystem accuracy

inspection

Repair the trouble partaccording to troubleshooting flow chart.

Repair the trouble partaccording to troubleshooting flow chart.

Carry out inspections for thetheodolite/EDM systems tomake sure that there is notrouble part.


25/201


4-2 Theodolite System Accuracy Inspection

Unit Item Inspection / Adjustment Procedure Standard

1 Perpendicularity ofplate level and ver-tical axis

Inspection: Operate the leveling screw to center the bubble.Turn the instrument in 180 to check the movement of thebubble.

Adjustment: Turn the level's adjustment nut to compensate for 1/2 theoffset, and turn the leveling screw to compensate for theother 1/2.

1/4 graduationor less

2 Perpendicularity ofcircular level andvertical axis

Inspection: Check it at the same time with the above 1.

Adjustment: Turn the level adjustment nut until the bubble is centered.

1/3 graduationor less

3 Alignment of verti-cal axis and opticalplummet tele-scopes line ofsight (opticalplummet accuracy)

Inspection: Collimate the object set 1m~1.5m away. The measuredvalue must be half the deviation when turning the instru-ment in 180.

Adjustment: Turn the retile adjustment screw to correct for half thedeviation.

0.5mm or less

4 Reticle verticalcross hair inclina-tion(Scale inclination)

Inspection: When aligning the telescopes upper or lower verticalcross hair with the bottom cross hair, check the offset ofanother cross hair.

Adjustment: Loosen the eyepiece cell set screw and align the reticlevertical cross hair with the bottom cross hair.

One verticalcross hair orless

Adjustment nut

Adjustment nut

Set screw


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5 Perpendicularity ofhorizontal axis andvertical axis(plumb line)

Inspection: Collimate the elevation angle collimator and then thedepression angle collimator. At that time, read the offsetfrom the vertical line at the normal and reverse positionsof telescope. The measured value must be half the differ-

ence between the read values at the normal and reversepositions.

Adjustment: Slightly loosen only the right horizontal bearing screwsA, B, and C. Use a rod pin and turn the plumb lineadjustment screw to press and adjust the metal part.

10" or less

6 Perpendicularity ofhorizontal axis andline of sight(reversing)

Inspection: Collimate one horizontal collimator, reverse the tele-scope and collimate another collimator. Read the devia-tion at each collimation. The measured value must behalf the deviation.

To eliminate the collimator's vertical error, when youhave done observation at normal and reverse positions,add the normal and reverse deviation. The measuredvalue must be 1/4 the obtained value.

Adjustment: Turn the right and left reticle adjustment screws to makethe adjustment.

10" or less

7 Tilt sensor operat-ing range

Inspection: Align the collimator scale with the reticle scale. Use thevertical tangent screw to display [9000'00"]. Use theleveling screw to incline the axis back and forth in 3' ormore from the vertical condition.

Adjustment: Carry out the tilt offset adjustment. If the operating

range cannot be corrected by offset adjustment, adjustthe tilt installation position.

TILT OVERis displayed.


A B

C

Not loosened

Loosen these screws.

Adjustment screw

Down Up

Amount of offset

Correction = Offset

Right and left

1

2

adjustment screws


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8 Tilt correctionaccuracy

Inspection: Align the collimator scale with the reticle scale. Use thevertical tangent screw to display [9003'00"]. Use theleveling screw to align the collimator with the reticlescale.

Adjustment: Carry out the tilt offset adjustment. If the correctionaccuracy cannot be corrected by offset adjustment,adjust the tilt installation position.

10" or less

9 Height 0 posi-tion

Inspection: Align the collimator scale with the reticle scale andcheck the error against the horizontal position[9000'00" (or 000'00")].

Adjustment: Carry out V ANGLE 0 POINT of the adjustmentmode (refer to the instruction manual). If the height 0position is not corrected by V ANGLE 0 POINT (erroris excessive), adjust the vertical scale installation posi-tion.

Install with the 3 set screws so that it is within 5 fromthe height 0 position.(Torque: 70Ncm (7kgfcm))

10" or less

10 Alignment of lineof sight for sight-ing collimator

Inspection: Catch the object with the sighting collimator. Then,when collimating the object with the telescope, the offsetfrom the reticle center must be the measured value.

Adjustment: Loosen the sighting collimator mounting screw and turnit right and left to correct.

Within 20'


+5

-5

Set screw

CCD unitCCD Ass'y mounting screw

Mounting screw


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7 Use the horizontal tangent screw to move the col-

limating point to the center of the prism gradually

until the buzzer begins to sound. Check the light

intensity level on the display unit. Adjust the col-limating point by turning the horizontal tangent

screw until the minimum level or level two of the

light intensity is displayed.

8 Write down the displayed horizontal angle.


limating point to the right side of the prism gradu-

ally until the buzzer stops sounding.


limating point to the center of the prism gradually.

As Procedure 7, adjust the collimating point by

turning the horizontal tangent screw until the min-

imum level or level two of the light intensity is

displayed.

11 Write down the displayed horizontal angle.

12 Calculate the center of the prism by the values

written in Procedure 8 and 11.

[Example]

Step 8: 0 01' 20"

Step 11: 0 09' 40"

Average: 0 04' 10"

Procedure Illustration

Prism

Reticle

V: 9010'10"HR: 0001'20"SIGNAL: [ ] #EXIT NP/P HOLD

Quantity level two

Prism

Reticle


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13 Collimate the center of the prism.

Compare the value of the horizontal angle at this

time with the one calculated in Procedure 12. If

the difference is within approx. 2', there is noproblem for use.

V (vertical) direction check

(Don't move the H (horizontal) direction.)

[Example]

Reading to prism center: 0 04' 30"

Calculation: 0 04' 10"

Difference: 20"

14 Carry out checking as the H direction and com-

pare the measured value of the prism center colli-

mation with the calculated average value. If thedifference is within approx. 2', there is no problem

for use.

Check in non-prism mode

If the instrument is in the light intensity hold

mode, press the [F4] (HOLD) key to cancel the

hold mode.

[Example]

Lower side of prism: 90 12' 30"

Upper side of prism: 90 04' 30"

Average: 90 08' 30"

Reading to prism center: 90 08' 50"

Average: 90 08' 30"

Difference: 20"

15 Press the [F3] (NP/P) key to change to the non-

prism mode.

16 Collimate the center of the prism.

17 Press the [F4] (HOLD) key to hold the light inten-

sity.

The mark # is displayed at the right side of the

light intensity display.


Prism

Reticle

V: 9010'10"HR: 0004'20" NPSIGNAL: [ ]EXIT NP/P HOLD

V: 9010'10"HR: 0004'20" NPSIGNAL: [ ] #EXIT NP/P HOLD


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18 Carry out checking in the non-prism mode as the

above Procedure 5 ~ 14. For each of the horizon-

tal and vertical directions, compare the collimated

value of the prism center with the calculated aver-age value. If the difference is within approx. 2',

there is no problem for use.

Check of the laser pointer optical axis

19 On the center of a section paper or a white paper,

draw a vertical line and a horizontal line to be

used as a target.

20 Set the above target about 10m away from the

instrument and collimate the intersection of the

vertical and horizontal lines.

21 Turn on the power of the instrument. Press the

star key and then press the [L.P.] key to light the

laser pointer.

22 When collimating the intersection on the target,make sure that the center of the laser pointer is

within about 6mm from the intersection on the tar-

get.


Target

About 10m

Note: If you look through the telescope at this time, you will not be able to see the laser

pointer. Therefore, conduct this check with the naked eye, viewing the target and

the laser pointer from the side of, or from above, the GPT-3000.


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(2) Inspection by using a collimator

The optical emitting wavelength of the GPT-3000 series is different from the current total stations. When

checking the optical axis by a collimator, the CCD camera and a monitor are used.

(It is possible to perform inspection by the collimator with the CCD camera used in the laser products. In

this case, the objective lens has to be changed to a one with magnification 5 (ST-3K-02)).

1-1 Necessary tools

1-2 Collimator

For inspection, you can use a collimator for general surveying instruments. There is no problem. For adjust-

ment, please use a collimator equipped with the laser reticle.

(The wavelength of the EDM light source is different between the reticles. If you make adjustment with the

normal reticle, the measured distance/linearity may be out of standard.)

Tool No. Name Remarks

ST-PT-21

ST-PT-31

CCD camera & monitor Made by Tokyo Electronics

CCD camera : CS3330B

Monitor : 9VM10A

ST-PT-24 Red circular image checking filter For GPT-2000

ST-PT-22 Objective lens Made by Nikon

Focal distance 50mm: F (1.8)

ST-PT-23 Red circular image checking tool (for the large

diameter collimator)

For GPT-2000

ST-PT-15 Red circular image checking tool (for the small

diameter collimator)

For GPT-2000

ST-3K-01 Reticle lighting tool

ST-3K-10 Light intensity adjusting filter Filter set (1% 5 pcs.)

Size: 50 50

Installation of the small diameter

collimator with adapter

550nm scale(for general surverying)

780nm scale(for invisible laser)


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2. Inspection

2-1 Preparation


1 Set the red circular image checking tool, CCD

camera and monitor as illustrated.

(Install the objective lens to the CCD camera head

and screw it into the red circular image checking

tool.)

2 Remove the illumination unit from the existing

depression angle collimator.

3 Install the red circular image checking tool onto

the rear of the depression angle collimator.

VIDEO IN CCD monitor

Red circular image

CCD camera

VIDEO OUT

Objective lens

checking tool

Depression angle collimator

Illumination unit

Red circular imagechecking tool


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4 Pull out the knob of the red circular image check-

ing tool and turn it in 90.

After installing the tool onto the collimator, return

the knob to the original position. The knob is

held.

5 Set the aperture and focal distance of the objective

lens according to the following conditions.

Conditions: Aperture: 1.8

Focal distance:

6 Turn on the power of the CCD camera controller

and the monitor.

Set the controller according to the following con-

ditions.

AGC : ON

: 1

SHUTTER : OFF

LINE : OFF

Others : Set optionally.

7 As watching the monitor, turn the collimators

eyepiece lens to adjust focus so that the collima-

tors reticle can be seen clearly.

Knob

8


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2-2 Optical emitting image position check


1 Collimate GPT-3000 to the scale of the depression

angle collimator.

If the scale of the collimator is not seen, install the

reticle lighting tool and project the instruments

reticle on the monitor.

2 Install the red circular image checking filter to the

front of the objective lens.

If the image on the monitor is too birght, use the

filter set (ST-3K-10).

CCD camera

CCD monitor

Red circular image checking filter

Lock


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3 Turn on the power as pressing the [F1] key.

ADJUSTMENT MODE (1/2) appears.

4 Press the [F4] (P) key to access ADJUST-

MENT MODE (2/2). Then, press the [F1] key to

access EDM CHECK.

5 Record the V angle and H angle at this time. (The

values of the collimation axis)

6 Fit the center of the optical emitting image to thecenter of the reticle. Record the V angle and H

angle at this time.

7 Make sure that the difference measured in Proce-

dure 5 and 6 is within the standard.

Error of the optical axis (prism):

Within 90"

8 Press the [F3] (NP/P) key to change to the non-

prism mode.

9 Fit the optical emitting image to the center of the

reticle and read the angle.

The line direction may be different between the

products.

10 Make sure that the difference between the value of

Procedure 9 and the collimation axis is within the

standard.

Error of the optical axis (non-prism):

Within 90"

Optical emitting image in prism mode

In the vertical direction, adjust the opticalemitting image to the position where the lengthof the upper and lower lines is uniform.In the horizontal direction, adjust the opticalimage with the center between the two lines.

Optical emitting image in non-prism mode


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Check of laser pointer optical axis

11 Turn off the power and, in the normal mode, turn

it on again.

12 Light up the laser pointer and fit the center of its

optical emitting image to the center of the reticle.

13 Make sure that the difference between the value of

V/H angle and the collimation axis is within the

standard.

Error of optical axis (laser pointer):

Within 90"

Optical emitting image of laser pointer


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4-3-2 EDM system inspection

The GPT-3000 series has not only the conventional prism measurement function but also the non-prism mea-

surement function. The EDM system must be inspected for the prism and non-prism measurements.

Note: To calculate the instrument constants, set the instrument constants inputted already to 0mm

and measure the linearity.

1. Inspection of prism measurement

(1) Linearity

Although there are several ways to check the linearity, the following is a simple and sure way.

Setting the base line site

The base line site is to be on solid ground (concrete, etc.). Avoid direct sunlight. A distance of about

40m must be allowed.

Set the point in a concrete block of at least 30-cm square.

Measure at 4, 10, 11.25, 12.5, 13.75 and 15 meters (for short distance)/33, 34.25, 33.5, 36.75 and 38

meters (for long distance). The setting error must be 5cm.

Use the steel tape to measure the distance (reference value) of each point. The accuracy must be 1mm

or less.

30cm

30cm

Point

The entire surface may also be concrete.(Indoor location is allowed).


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Measurement

Set up GPT-3000 at the 0m point, and prepare a check sheet as shown below for each point and collect

the data. Record the data for 10 measurements at each point.

After measurement, check the instrument constants P (S) and P (L).

Calculate the instrument constants P (S) and P (L) as follows:

P (S) = Center value of P - P (minimum/maximum values)

... Center value between the minimum and maximum values of the errors (X - ) for the short

distance 5 points

P (L) = ... Average value of the errors (X - ) for the long distance 5 points

To input the instrument constants, refer to 13-2 EDM Instrument Constant Input.

(2) Long distance linearity Setting the base line site

At a distance more than 300 meters away, install two points to be used for setting the prism. Select a

place of normally good atmospheric conditions and use three prisms.

Measurement

To measure the reference value, use the EDM and average the values from two or three EDMs.

For long distances, the distance will vary slightly (normally 10mm) due to the atmospheric conditions.

Therefore, calibrate the unit once a month.

Note: Also take the PPM correction into account.

Measurement

Distance

Average

x

Referencevalue

Error

x-

1

4m

10

36.75

38

6

2

7

3

8

4

9

5

104.004 4 5 4 4

4.0044 4.00544 -0.0010

+0.0010

-0.0010

-0.0030

-0.0010

5 5 4 4 5

3

2

1

-1

-2

-3

12 14 16 18 20(m)

(mm)

(X-)

5


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2. Inspection of non-prism measurement

In the non-prism mode of the GPT-3000 series, there are four kinds of the instrument constants as shown

below. Measure a proper point carefully and obtain the correct instrument constants.

Non-prism mode short distance NP (S) : Point A

Non-prism mode long distance NP (M): Point B

Non-prism mode long distance NP (L) : Point C

Non-prism mode 1.5m : Point D

(1) Linearity

Setting the base line site

The following 21 places are measurement points. These points cover the peak of errors in linearity mea-

surement. If a wrong measurement (the number of point is not full, the point position is not correct, etc.)

is done, you cannot get a correct offset value. Be careful.

Point A: Used for NP (S). 13 points: 3, 3.75, 5, 6.25, 7.5, 8.75, 9.5, 14.5, 15.5, 16.5, 17.5, 18.5, 19.5 (m)

Point B: Used for NP (M). 1 point: 25 (m)

Point C: Used for NP (L). 5 points: 33, 34.25, 35.5, 36.75, 38 (m)

Point D: Used for NP (1.5). 2 points: 1.5, 2.5 (m)

Set each point at within the above distance 50mm.

Let each target face the GPT-3000 correctly. (The word face means the surface of the GPT-3000 objec-

tive lens faces the surface of each target in parallel with the error of3 or less.) To set the targets cor-

rectly, use a mirror. (Select a mirror which is larger than a target size.)

Target: Use the white surface side of gray card (Cat. No. E152 7795 made by KODAK).

For 1 point, cut the card (size: 8 10 inches) to half to use the one (size: 8 5 inches).

To collimate the center of the target, put a mark on the cross hairs or the center position.

When measuring the linearity for only the GPT-3000 series (in non-prism measurement with small

diameter), the card (size: 4 5 inches (1/4)) can be used.

How to set the target

1. Set a mirror where a target should be set.

2. Collimate the mirror through the GPT-3000.

3. Adjust the mirror position to see the GPT-3000 from the eyepiece. When the mirror is already in the

aforementioned position, the setting conditions are satisfied. As taking care about the mirror posi-

tion (inclination, direction, etc.), set a target.


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4. In the same way, set targets at 21 points.

Measurement

As prism measurement, prepare a check sheet (as the prism mode) for each point and collect the data.

Check the instrument constants and, if necessary, change them.

How to calculate the instrument constants

NP (S) = Center value of P - P (minimum/maximum values)

... Center value between the minimum and maximum values of the errors (X - ) for the short

distance 13 points

Error in the case of NP (M) = 25m

NP (L) = ... Average value of the errors (X - ) for the long distance 5 points

NP (1.5) = The special formula is prepared. So, calculate the error on the Excel sheet. (In this case,

the value of NP (S) is necessary.)

To change the instrument constants, refer to 13-2 EDM Instrument Constant Input.

(2) Measurement test

As prism measurement, make sure that the specified measured distance is satisfied. For checking, there

are two methods, actual measurement and pseudo-measurement.

(2)-1 Check by actual measurement

Check whether the instrument measures a point at 250m point.

(2)-2 Check by pseudo-measurementInstall the NP measured distance checking filter onto the front of the objective lens and check whether the

instrument measures the target.

The measured distance (target set point) is written on the filter.

For checking, be careful for the following points.

Let the target face the objective lens correctly.

Use one gray card (8 10 inches) as a target.

The gray surface must be measured.

The distance msut be approx. 35m.

NP linearity Half gray card: White surface

3.0m 3.75m 38m

(X-)

5


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4-4 Error Code Table

(1) Error codes

Display Description CountermeasureRef.Page

Tilt Over When the inclination of the instru-ment exceeds the automatic cor-rection range

Level the instrument correctly. If this error isstill displayed, the probable causes are as fol-lows :1. Tilt offset is deviated.2. Tilt installation error is excessive.Carry out repair according to the instructions inthe right page.

6-6

V ANGLEERRORH ANGLEERRORVH ANGLEERROR

When the angular measurementsystem is abnormal

This error is displayed when the instrument ortelescope rotates too fast but it is not trouble. Ifthis error is constantly displayed, check thedetails of error code with the factory mode andtake the repair method of the error code.

6-7

E35 When REM (remote elevationmeasurement) is done within6 from zenith or nadir

Check without 6 from zenith or nadir and, ifthe error message is not displayed, there is noproblem.

6-8

E60 EDM unit battery lower level error Replace the D-OSC unit.

E61 EDM EEPROM error hasoccurred. When EEPROM on D-OSC is abnormal, this error is dis-played.

Replace D-OSC. 6-9

E63 Phase plate stop error Replace the open air motor unit.

E68 Chopper operation error has

occurred. When chopper does notoperate, this error is displayed.

Connect the tool and check the chopper opera-

tion. Then, replace EDM Base or D-OSC unit.

6-9

E69 When a command is sent andEDM does not respond within 1second, this error is displayed.

Probable causes are as follows: Cable is faulty,cable is not arranged correctly, connector isfaulty, slip ring is faulty, slip ring brush is incontact, or there is a problem around the EDMpower supply or main PCB. Locate the troubleplace and replace the unit.

6-10

E71 When the vertical angle zero pointis adjusted in a wrong procedure,this error is displayed.

Check the procedure and readjust. 6-11

E72 When the vertical angle zero pointis sharply deviated in its adjust-ment, this error is displayed.

Start the adjustment from the first again.If the error message is still displayed, the scaleinstallation position may be 5 or more.Carry out repair according to the instructions inthe right page.

6-11

E73 During the vertical angle zeropoint adjustment, when the instru-ment is not leveled or when thevertical/horizontal angle correctiondevice malfunctions, this error isdisplayed.

Level the instrument again and readjust. Invertical angle zero point adjustment, level theinstrument within 2'. If the error message isstill displayed, check the tilt offset/tilt installa-tion adjustment.

6-11


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E81 When the angle unit of the instru-ment (DEG, GON, MIL) is differ-ent from the angle unit set incommunication, this error is dis-played.

Fit the units each other. 6-12

E82 While the ACK mode is set atstandard, the instrument outputsdata but the external devices suchas FC, PC, etc. do not send ACKwithin the regular time. Under thiscondition, when data is sent tentimes but ACK is not received, thiserror is displayed.

Check the following points: Parameter setting,software at PC side, cable, wiring/contactaround 6PIN connector and wiring/contactaround slip ring. Carry out repair according tothe instructions in the right page.

6-13

E92 When tilt offset is not set within2' in factory mode, this error isdisplayed.

Install tilt to set the tilt offset within 2'. 6-14

E99 Non-volatile memory error Perform initialization. If this error is still dis-played, replace the main PCB.

6-14

E600 Gate array error has occurred.Gate array on the angular measure-ment PCB malfunctions.

Replace the angular measurement PCB(PCB31).

6-7

E621~E623 CCD integral time Low error hasoccurred. When light is taken intoCCD in a too short time, this errormessage is displayed.

Probable causes are as follows:1. CCD unit2. LED unit (only for V)3. Main PCBReplace the unit.

6-7

E631~E633 CCD integral time High errorhas occurred. When light is takeninto CCD in a too long time, thiserror message is displayed.

Probable causes are as follows:1. CCD unit2. LED unit (only for V)3. Main PCBReplace the unit.

6-7

E641~E643 Pattern pitch error has occurred.When the pattern pitch taken inCCD is out of standard, this errormessage is displayed.

Probable causes are as follows:1. Set values for main PCB are abnormal.2. CCD unit3. Scale (soil and damage)Adjust the factory mode or replace the unit.

6-7

E681~E683 LED_PWM_High error hasoccurred. When light intensity

taken in CCD is excessive, thiserror message is displayed.

Probable causes are as follows:1. LED unit (only for V)

2. CCD unit3. Main PCBReplace the unit.

6-7

E691~E693 LED_PWM_Low error hasoccurred. When light intensitytaken in CCD is insufficient, thiserror message is displayed.

Probable causes are as follows:1. LED unit (only for V)2. CCD unit3. Main PCBReplace the unit.

6-7

E731~E733 CCD pattern contrast error hasoccurred. When trouble hasoccurred frequently in the CCDwaveform (RABC pattern), this

error is displayed.

Probable causes are as follows:1. Scale (soil and damage)2. CCD unit3. Main PCB

Replace the unit.

6-7



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E741~E743 A_Phase error has occurred.When the A pattern phase is abnor-mal, this error is displayed.

Probable causes are as follows:1. Scale (soil and damage)2. CCD unit3. Main PCBReplace the unit.

6-7

E751~E753 B_Phase error has occurred. Whenthe B pattern phase is abnormal,this error is displayed.


6-7

E761~E763 C_Phase error has occurred. Whenthe C pattern phase is abnormal,this error is displayed.


6-7

E771~E773 Angle calculation error hasoccurred. When data of the angu-lar measurement CCD unit isabnormal, this error is displayed.

Probable causes are as follows:1. CCD unit is faulty. (Installed position)2. Main PCB3. Scale (soil and damage)Replace the unit.

6-7

FILE EXISTS The file with the same name exists. Check the file name and input it again. -----

FULL FILES Files have already been made up tomaximum quantity (30) and morefiles cannot be made.

Reduce the file quantity by deleting the unnec-essary file, etc.

-----

FILE NOTSELECTED

When file data is necessary, a fileto be used is not selected.

Select a file and execute the procedure again. -----

PT# DOESNOT EXIST

The input point name does notexist in the internal coordinatedata.

Check the point name and input it again. -----

CALCERROR

When setting a direction angle,the input rear view point coordi-nate is the same as the instru-ment constant coordinate

When the layout mode is exe-cuted, the input layout coordi-nate is the same as theinstrument constant coordinate

When setting a new point, its

coordinate cannot be calculatedbecause of wrong measurement,etc.

Check the point name and input it again. When setting a new point, perform measure-

ment again.

-----

PT# EXIST When setting a new point name,the same point name already existsin the internal coordinate data.

Select another point name and store it. -----

LIMIT OVER A numerical value out of therange has been input.

When setting a new point, itscoordinate cannot be calculatedbecause of wrong measurement,etc.

Check the value and input it again. Perform measurement again.

-----



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Use tweezers to disconnect the 9 connectors.

CPU

UnitRemoval

Remove the 4 screws.

Use tweezers to disconnect the 2 connectors

from the rear of the CPU unit.


48/201



RightCoverRemoval


Notes:

The waterproof Teflon washer is attached

to all the screws.

When assembling, tighten all the screws

with torque of 20Ncm (2kgfcm).

DisplayUnitRemoval


Notes:


to all the screws.

When assembling, tighten the screws with

torque of 10Ncm (1kgfcm).

(Tighten them with the same torque for

the reverse display unit.)

In GPT-3007, the cover unit is installed at

the reverse display unit. Apply silicone

(KE-3475T) to the whole circumference.

Remove the clamp of the connector on the rear

of the display unit and then remove the flexible

cable.(Take the same procedure for the reverse display

unit.)

1

2

1

2

3


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Packing1Removal

Remove the packing 1.

Notes:

When assembling, fit the packing 1 not to

protrude from the groove.

When the display unit is removed, replace

the packing 1 in principle.

LCDR

emoval

Remove the 8 screws and then remove LCD.

[F]KeysandModeKeysRemo

val

Remove the [F] keys and mode keys.

Note: When assembling, fit the keys as push-

ing their periphery not to float each key.

1

2


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VerticalClampUnitRemoval

Remove the vertical clamp unit.

Note: When removing, be careful about the

middle, right and left pads.

VSlipRingUnitRemoval

Use tweezers to disconnect the cables from the

connector.

Remove the 3 screws and then pull out the V slip

ring unit.

Red

2-pin connector

Black BlueWhite Orange

Green

Cable arrangement of slip ring

5-pin connector(The pin 5 is open.)


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Telescope(EDM)Removal

Lift up the telescope (EDM) unit to remove it.

Horizon

talTangentUnitRemoval

Loosen the tangent cylinder and remove the piston.

Note: Using a wide screwdriver, remove the

piston not to damage the slotted

groove.

Use a hexagonal wrench (M1.5) to loosen the 2

screws.


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LowerCoverRemoval


Note: The waterproof Teflon washer is

attached to all the screws.

(H)BrushMountRemoval

Remove the 1 screw.

Note: When removing the (H) brush mount,

be careful not to bend the brush.

(H)SlipRingUnitRemoval


Note: Before removing the (H) slip ring unit,

remove the cable band.


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VerticalAxis

UnitRemoval

How to install the vertical axis unit

Against the housing mark ( mark) of upper

panel, the triangular mark ( ) of scale must

be at the illustrated position.

The tightening torque of the vertical axis unit

mounting screws is 120Ncm (12kgfcm).

Lift up the vertical axis unit and remove it from

the upper panel.

Upper panel housing markTrianglar mark

( mark)


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5-2 Telescope (EDM Unit) Disassembly Procedure


LensBarrelCoverRemoval

Remove the 4 screws and then remove the lens

barrel cover.

When assembling, set the Teflon washer and

tighten the screws with a torque screwdriver

(20Ncm/2kgfcm).

ED

MCablesRemoval

Remove the coaxial cable (CN3).

Remove the LD/PG cable (CN8).


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Remove the head amplifier coaxial cable (CN3).

EDMCablesRemoval

Remove the chopper motor cable (CN10).

Remove the rhomb prism motor cable (CN9).


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EDMCablesRemoval

Remove the power cable (CN1).

OpticalR

eceivingUnitDisassembly

Remove the tape, which fixes the optical receiv-

ing fiber on the head amplifier.

Remove the optical receiving fiber fixing screw

from the head amplifier.


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Remove the optical receiving fiber from the head

amplifier.

If the screw lock is applied to the optical receiv-

ing fiber, it cannot be removed easily. In such a

case, do not pull the optical receiving fiber forc-

edly.

OpticalReceiving

UnitDisassembly

Remove the screws (3 pcs.) which fix the head

amplifier fixing plate. Then, remove the head

amplifier and its fixing plate together.

Loosen the circular unit fixing screw and then

remove the unit.


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Op

ticalReceivingUnitDisassembly

Loosen the mounting screws and then remove

the unit.

The optical receiving fiber is installed to the unit.

So, remove the unit carefully.

BaseRemoval

Remove the base mounting screws.

When assembling, push the base in the arrow

direction until it stops.

Tightening torque: 5kgfcm (50Ncm)

Remove the relay connector of the LP cable.


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BaseRemoval

Remove the base as taking care to prevent the

connector from being caught by the cable hole of

the shield plate.

When assembling, pass the cables through the

hole of the shield plate and pull them toward the

opposite side.

Pass the rhomb prism motor cable as shown

below.

PipeUnitRemoval

Remove the pipe unit fixing screws.

When assembling, push the pipe unit in the

arrow direction until it stops.Tightening torque: 5kgfcm (50Ncm)

Pass the cable through the arrow place andthen pull it toward the opposite side.

Cable hole


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Remove the mounting screw and then remove

the shield plate.

When assembling, tighten the screw and then

apply the adhesive to the places as shown below.

DichroicUnitDisassembly

Remove the dichroic unit fixing screw.

Tightening torque when assembling: 5kgfcm (50Ncm)

Push the unit in the direction as shown below

until it stops.

Remove the dichroic unit.

Instantaneous adhesive

Screw lock (red)


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Use the objective plate wrench (ST-DA-13) to

loosen the objective lens unit.

ObjectiveLen

sUnitRemoval

Turn the objective removal tool (ST-DA-14)

clockwise to raise the objective lens unit.

Remove the objective lens unit.


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EyepieceBaseUnitR

emoval


Remove the eyepiece base unit.

FocusRingRemoval



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FocusRingRemo

val

Remove the focus ring holder.

Turn the focus ring clockwise to remove it.

InternalAssyRemoval

Use a rod pin to loosen the lead pin.


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5-3 Left Cover Disassembly Procedure (Bluetooth Type)


LeftCoverRemoval

Remove the 5 screws and then remove the left

cover.

Notes:When installing the left cover, the tighten-

ing torque of the screw is 20Ncm

(2kgfcm).


to all the screws. Be careful.

CableRemoval

Remove the Bluetooth unit cable from the CPU

unit.

BluetoothUnitRemoval

Remove the 2 screws and then remove the Blue-

tooth unit from the problem left cover.

Note: The Bluetooth unit is a strategic mate-

rial product and so is not sold as a singleunit for other purposes except replace-

ment/repair.

When the Bluetooth unit is removed,

please use it for the same instrument as

before.

1

2


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BluetoothUnitInstallation

Fit the Bluetooth unit into the new left cover.

Record the Bluetooth address number (12 digits).

The Bluetooth unit address number in the right

illustration is 0000E14F49B2

Note: The above address number is used for

checking the Bluetooth communication

(P. 10-6).BD 0000E14F49B2

A 27000031

Bluetooth address number (12 digits)


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6. TROUBLE SHOOTING

6-1 Trouble Shooting Flow Chart

This chapter will explain the replacement of units against symptoms by using flow charts to locate the prob-

lem unit.

(Example)

* Before replacing the PCB unit, obtain the user data and user set values.

NO

YES

Symptom

* Reference item

Diagnosis

Find and replace the problem unit.

NO

YES

NO

YES

Diagnosis Diagnosis


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(1) The power is not turned on.

Refer to the following table for other probable problem units.

If any connector is disconnected (including the improper contact) on the PCB or if the software is not installed

properly, the power may not be turned on, either. (Check the contact or install again and then check the opera-

tion.)

Unit How to check

Display unit

Display unit cable

Check the operation of the power switch on the normal and reverse sides. If only

the reverse (or normal) side operates normally, the normal (or reverse) display

unit may malfunction. Replace the unit (display unit, display unit cable, etc.) andcheck the operation.

Right cover unit Use the external power supply (tool power supply), etc. and supply the power

from the bottom of the instrument. If normal operation is done, the instrument's

right cover unit may malfunction. Replace the unit and check the operation.

NO

YES

The above symptom has occurred.

Contact it properly.

Is the terminalvoltage of the internalpower supply 7.2V?

Replace the CPU unit.

Recharge.

NO

YES

Is the terminal voltage 7.2V?

NO

YES

Is it contactedwith the instrument's

terminal?

Repair the internal power supply.

Refer to P. 7-2.


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(2) [Battery empty]

When using BT-32Q, the use time is shortened compared with BT-52QA.

If using the external power supply of about 7.2V, the battery level display may blink. But it does not show a

trouble. If you check the battery level with the external power supply, use 2~3 batteries of about 8.4V as stan-

dard. (The reference value of input voltage is different between the internal and external power supplies.)

NO

YES

NO

YES

NO

YES

OK

NO

YES

Is the error displayed?


Is the terminalvoltage of the internalpower supply 7.2V?

Recharge.

Is the terminal voltage 7.2V?

Is it contactedwith the instrument's

terminal?

Contact it properly.Replace the CPU unit. Repair the internalpower supply.

Refer to P. 7-2.


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(3) Display is missing.

Keys do not work. (Keys are not switched.)

NO

YES

Display is missing.

Replace the display unit cable.

One side is missing.


NO

YES

Replace the display unit.

OK

Refer to P. 7-2.


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(4) Return signal level does not increase.

The C mark does not move.

The C mark stops midway.

The C mark does not stop moving.

NO

YES


Is the P/NP

operation changed

normally?

Replace the base unit.

OK

NO

YES

Does the

chopper unit operate

normally?

Adjust the Ref light intensity.NO

Is the reference

light intensity voltage

normal?

YES

Replace the circular unit.NO

Does the

circular unit operate

normally?

YES

Replace the EDM amplifier unit.

NOAfter replacing

the D-OSC PCB,is it OK?

YES

Refer to P. 7-3.

Refer to P. 11-8.

Refer to P. 7-3.

Refer to P. 7-3.


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(5) [TILT OVER]

When the inclination is 3' or more against the horizontal position including the offset value of tilt sensor, this

error is displayed. The tilt unit or angular measurement main PCB unit may malfunction. But this error is

sometimes canceled by adjusting the tilt offset or its installation position. Before replacing the unit, check if

adjustment is correct.

NO

YES


Adjust the installationposture of the tilt unit.

Is the instrument leveled?

Replace the tilt unit.

Level the instrument and check it.

NO

YES


NO

YES

Is the tiltunit installed and adjustedcorrectly?

OK

In the factory mode, input thetilt offset again.

NO

YES

NO

YES


In the parameter setting mode1,set tilt correction to OFF.



Refer to P. 8-3.

Refer to P. 8-8.

Refer to P. 7-2. Refer to P. 7-2.Refer to P. 9-21.


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(6) [V ANGLE ERROR]

[H ANGLE ERROR] [E600/E700 range]

[VH ANGLE ERROR]

Check the displays of [ANGLE ERROR] in the factory mode. They are errors of the E600 and E700 range

and, in the range, you can check the details. (*E600 shows that the gate array on the CPU unit is faulty.

Replace the CPU unit.)

In an error code of 3 digits (in the E600/E700 range), the right-end digit shows a trouble place. (Refer to the

following example.)

Example)

E621: CCD integral time_Low error ..........The trouble CCD is 1.H1

E622: CCD integral time_Low error ..........The trouble CCD is 2.H2

E623: CCD integral time_Low error ..........The trouble CCD is 3.V1

E624: CCD integral time_Low error ..........The trouble CCD is 4.V2

After checking the 3-digit error display, carry out the following procedure. (For example, E622 is explained.)

Example)

1. In the factory mode, obtain and check the CCD set values. (If an abnormal value is inputted, input a normal

value and make sure that the error is canceled.)

2. Remove the cover and connect the tool to the CPU unit. Check the waveform of the CCD which is proba-

bly a problem unit.3. By observing the waveform, judge that the problem unit is CCD unit, LED unit, Scale (soil or

damage) or CPU unit. Replace (or clean) the unit.

4. In the factory mode, input the set values again and check the operation.

5. Perform inspection.


In the factory mode, check the detailederror code (3 digits).

Check the set values and waveform ofCCD. Then locate the problem unit.

Replace the problem unit as referring to

the replacement procedure.


E600 has occurred. *

Refer to P. 8-11.

([F3] : CCD angle

Refer to P. 6-15.

Refer to P. 7-1.

measurement mode)Refer to P. 7-2.

1 2 3

4


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(7) [E35] is displayed.

When the measurement key is pressed in the REM mode while the lens barrel is within 6 from zenith or

nadir, this error is displayed. When this error is displayed under this condition, it does not show a trouble. Be

Documents

GPT-3000 - manual de serviço.pdf