Nidek Medical LT-1000 User manual

May 2006
Pages in total: 38
LLT8*RDA001A/E
SATELLITE TRACER
Model LT- 1000
SERVICE MANUAL

NIDEK CO., LTD. : 34-14, Maehama, Hiroishi-cho, Gamagori, Aichi 443-0038, Japan
(Manufacturer) Telephone: [phone]
Facsimile: (0533) 67-6610
NIDEK CO., LTD : 6th Floor, Takahashi Bldg., No.2, 3-chome, Kanda-jinboucho
(Tokyo Office) Chiyoda-ku, Tokyo 101-0051, Japan
Telephone: [phone]
Facsimile: [phone]
Telex: 2226647 NIDEK J
NIDEK INCORPORATED : 47651 Westinghouse Drive, Fremont, California 94539, U. S. A.
(United States Agent) Telephone: [phone]
Facsimile: [phone]
NIDEK SOCIETE ANONYME : Europarc 13, rue Auguste Perret, 94042 CRETEIL, France
(Authorized Representative) Telephone: [phone]
Facsimile: (01) 49 80 32 08

Table of Contents
§ 1 INTRODUCTION ............................................................................. 1-1
§
2 SAFETY PRECAUTIONS ............................................................. 2-1
2.1 General ..................................................................................................................... 2-1
2.2 During Service...........................................................................................................2-1
§ 3 TROUBLESHOOTING................................................................... 3-1
§
4 SUB TROUBLESHOOTING .......................................................... 4-1
4.1 The LT-1000 does not Start.......................................................................................4-1
4.2 The Color LCD Display is Abnormal. .........................................................................4-2
4.2.1 The back light does not light up. ......................................................................4-2
4.3 The Touch Panel is not Operational. .........................................................................4-3
4.4 The Main Screen is not Displayed on the Color LCD. ...............................................4-4
4.5 Frames are not Traced. ............................................................................................. 4-4
4.5.1 Initialization does not start. ...............................................................................4-5
4.5.2 Tracing does not start. .....................................................................................4-5
4.5.3 No traced data is displayed. ............................................................................ 4-6
§ 5 REMOVING PROCEDURE.............................................................. 5-1
5.1 Top Cover ASSY. .......................................................................................................5-1
5.2 Cable Cover ..............................................................................................................5-1
5.3 LCD Rear Cover ........................................................................................................ 5-2
§ 6 REPLACEMENT PROCEDURE ...................................................... 6-1
6.1 Tracer ASSY. .............................................................................................................6-1
6.2 Switching Power Supply ............................................................................................6-1
6.3 Cable Assembly ......................................................................................................... 6-2
6.4 Fan Assembly ............................................................................................................ 6-2
6.5 Color LCD Module .....................................................................................................6-2
6.6 Inverter ......................................................................................................................6-3
6.7 Printed Circuit Board .................................................................................................6-3
6.7.1 BA04 board ......................................................................................................6-3
6.7.2 BA01 board ......................................................................................................6-3
6.7.3 BA02 board ......................................................................................................6-4
6.7.4 BA05 board ......................................................................................................6-4
6.7.5 BA03 board ......................................................................................................6-5
6.7.6 Seesaw switch .................................................................................................6-5

§ 7 ADJUSTMENT ................................................................................ 7-1
7.1 Touch Panel Calibration ............................................................................................ 7-1
7.2 Tracing Unit Calibration .............................................................................................7-1
7.2.1 Calibration with standard frames......................................................................7-1
7.2.2 Calibration with standard pattern .....................................................................7-2
7.2.3 Torque calibration ............................................................................................ 7-3
7.2.4 Full calibration .................................................................................................7-3
7.3 Displaying Parameter Setting Screen ........................................................................ 7-5
7.4 Time and Date Settings .............................................................................................7-6
7.5 Software Upgrade .....................................................................................................7-6
§ 8 INFORMATION ................................................................................ 8-1
8.1 Wiring Diagram ..........................................................................................................8-1
8.2 Appearance ............................................................................................................... 8-2
8.3 Labels........................................................................................................................8-4
8.4 Error Code Table .......................................................................................................8-5
8.5 Factory Setting of Tracing Unit ..................................................................................8-5
8.6 Parameter Setting Table ............................................................................................8-6
§ 9 SUPPLEMENT ................................................................................ 9-1
9.1 Abbreviation for Screws ............................................................................................. 9-1

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LLT8A*RDA001A/E
• This service manual is for the SATELLITE TRACER LT-1000. It does not include technical
information for preparing lenses.
• This manual is thoroughly understood before servicing.
• Refer to the SATELLITE TRACER LT-1000 Operator’s Manual and Parts List.
• Specifications are subject to change without notice for improvement. Refer to the Technical
Bulletin for important changes.
• In case the instrument can not be repaired according to the procedures described in this
manual, please report the serial number of the instrument and details of the symptom or
symptoms.
§
1 INTRODUCTION

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LLT8A*RDA001A/E

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LLT8A*RDA001A/E
§
2 SAFETY PRECAUTIONS
2.1 General
• Servicing should be performed by NIDEK service persons or other qualified personnel.
• Perform all servicing according to the procedures described in this manual. Failure to do
so may cause unexpected accident or malfunction.
• Be sure to turn the power off during servicing unless there is an instruction to turn it on.
• Never use organic solvents such as a paint thinner to clean the exterior of the instrument.
It may ruin the surface of the instrument.
2.2 During Service
• If malfunction occurs, check the symptom and turn the power off.
• Do not lose or drop removed parts inside the instrument. Prepare a case beforehand to
store loose parts. Take care not to bump the instrument.
• Use suitable tools to screw or unscrew the screws.
• Apply a threadlocking adhesive to the screws which have been loosened and tightened
again.
• After part replacement, check that all parts are fixed in their original positions securely.
• If the LT-1000 produces smoke or strange odors, immediately turn the power off and
disconnect the electrical plug from the outlet. Usage of the instrument under such abnormal
conditions may cause fire or electric shock.
• In §3 TROUBLESHOOTING, when checking a break in a cable, also check the following
according to the wiring diagram.
1. Proper connections and crimping
2. Proper contact by connecting and disconnecting connectors
3. Proper soldering
• Do not yank the cables with excessive force. Doing so could cause breakage.
• Do not perform servicing with wet hands. Doing so could cause electric shock or
malfunction.
• Never install the instrument in a place where it is exposed to water.
• Do not use adjustment jigs for other than the intended purpose.

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LLT8A*RDA001A/E

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LLT8A*RDA001A/E
§
3 TROUBLESHOOTING
Plug the power cord in the wall outlet and turn the
power switch on.
Does the LT-1000 start?
Is the color LCD display normal?
Is the LT-1000 touch panel operational?
Are frames traced?
4.1 The LT-1000 does not start.
4.2 The color LCD display is abnormal.
4.5 Frames are not traced.
Yes
Yes
Yes
No
No
No
4.3 The touch panel is not operational.
No
End
Yes
Is the main screen displayed on the color LCD? 4.4 The main screen is not displayed on the color
LCD.
Yes
No

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LLT8A*RDA001A/E

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LLT8A*RDA001A/E
§
4 SUBTROUBLESHOOTING
4.1 The LT-1000 does not Start.
Use a wall outlet which meets the specifications.
Is the voltage from the wall outlet within the
specifications? (100 V and 200 V systems: ±10%)
Are the fuses blown?
Is the voltage between the CN1 1st and 3rd pins
on the switching power supply (80602-00104) the
same as the input voltage?
Is the voltage between the CN2 3rd and 1st pins
on the switching power supply (80602-00104) DC
+ 24 V?
Is the voltage between the P203 (J3) 1st and 2nd
pins on the BA02 board (43401-BA02) DC + 24 V?
Is the voltage between the P202 (J2) 1st and 2nd
pins on the BA02 board (43401-BA02) DC + 12 V?
Is the voltage between the P101 (J1) 1st and 2nd
pins on the BA01 board (43401-BA01) DC + 12 V?
On the BA01 board (43401-BA01):
Is the voltage between the IC36 6th pin and GND
DC + 5 V?
AND
Is the voltage between the IC37 8th pin and GND
DC + 3.3 V?
Replace the fuses (80402-02039).
Replace the seesaw switch (80460-00103).
(Refer to 6.7.6.)
Replace the CA04 cable (43401-CA04).
Replace the BA02 board (43401-BA02).
(Refer to 6.7.3.)
Replace the BA01 board (43401-BA01).
(Refer to 6.7.2.)
No
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
No
No
Replace the switching power supply (80602-
00104). (Refer to 6.2.)
No
No Replace the BA01 board (43401-BA01).
(Refer to 6.7.2.)
4.2 The color LCD display is abnormal.

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LLT8A*RDA001A/E
4.2 The Color LCD Display is Abnormal.
4.2.1 The back light does not light up.
4.2.1 The back light does not light up.Does the back light light up?
Is there a break in the LCD cable (42203-E018)?
Replace the color LCD module (40273-E020).
Is the symptom improved?
End
Replace the LCD cable (42203-E018).
No
Yes
No
Yes
Yes
Replace the BA01 board (43401-BA01).
(Refer to 6.7.2.)
No
Replace the BA01 board (43401-BA01).
(Refer to 6.7.2.)
Is the voltage between P106 (J6) 1st and 2nd pins
on the BA01 board (43401-BA01) DC + 12 V?
Is there a break in the CA10 cable (43401-CA10)?
Replace the inverter (42203-E017).
(Refer to 6.6.)
Is the symptom improved?
End
Replace the CA10 cable (43401-CA10).
No
Yes
No
Yes
Yes
Replace the BA01 board (435401-BA01).
(Refer to 6.7.2.)
No
Is the symptom improved?
Yes
No
Replace the color LCD module (40273-E020).
(Refer to 6.5.)

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LLT8A*RDA001A/E
Is the symptom improved?Is touch panel calibration possible?
End
Is there a break in the CA09 cable (43401-CA09)?
Is there continuity in the following connectors on
the BA04 board (40273-BA04)?
J1 connector - J2 connector
1st pin - 1st pin
2nd pin - 2nd pin
3rd pin - 3rd pin
4th pin - 4th pin
Replace the color LCD module (40273-E020).
(Refer to 6.5.)
Is the symptom improved?
Is the side plate (43401-M004)
grounded to the casing by the CA12
cable (43401-CA12) and CA13 cable
(43401-CA13)?
Ground the side plate to the
casing with the CA12 cable
(43401-CA12) and CA13 cable
(43401-CA13).
Replace the CA09 cable (43401-CA09).
Replace the BA04 board (40273-BA04).
(Refer to 6.7.1.)
Replace the BA01 board (43401-BA01).
(Refer to 6.7.2.)
Ｎo
Yes
Yes
No
Yes
Yes
No
No
End
NoYes
No
Yes
4.3 The Touch Panel is not Operational.

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LLT8A*RDA001A/E
4.4 The Main Screen is not Displayed on the Color LCD.
4.5 Frames are not Traced.
Insert a CF card containing the application files
(It8a_autoload.bin and It8a_autoload.txt).
Does the inserted CF card contain the application
files (It8a_autoload.bin and It8a_autoload.txt)?
Replace the BA01 board (43401-BA01).
(Refer to 6.7.2.)
Is the symptom improved?
End
Use a different CF card on which the application
files have been copied.
Yes
No
Yes
Ｎo
4.5.1 Initialization does not start.Does tracing unit initialization start?
Does tracing unit initialization complete?
Does tracing start when the trace button is
pressed?
Is there a communication error even when the
DATA SET button on the screen is pressed and
no traced data is displayed?
End
Replace the tracer ASSY. (43401-4000).
(Refer to 6.1.)
4.5.3 No traced data is displayed.
Yes
Yes
Yes
No
Yes
No
No
4.5.2 Tracing does not start.
No

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LLT8A*RDA001A/E
4.5.1 Initialization does not start.
4.5.2 Tracing does not start.
Replace the BA02 board (43401-BA02).
(Refer to 6.7.3.)
Is the voltage between the P204 (J4) 1st and 6th
pins on the BA02 board (43401-BA02) DC + 24
V? At this time, P204 is not connected.
Is there a break in the CA06 cable (43401-CA06)?
Replace the tracer ASSY. (43401-4000).
(Refer to 6.1.)
Replace the CA06 cable (43401-CA06).
No
No
Yes
Yes
Replace the CA05 cable (43401-CA05).Is there a break in the CA05 cable (43401-CA05)?
Replace the BA05 board (43401-BA05).
(Refer to 6.7.4.)
Is the symptom improved?
End
Replace the tracer ASSY. (43401-4000).
(Refer to 6.1.)
Yes
Yes
No
No

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LLT8A*RDA001A/E
4.5.3 No traced data is displayed.
Replace the CA06 cable (43401-CA06).Is there a break in the CA06 cable (43401-CA06)?
Is there a break in the CA07 cable (43401-CA07)?
Are the DIP switches of the tracer ASSY. (43401-
4000) set properly? (Refer to 8.5.)
Is there continuity in the following connectors on
the BA02 board (43401-BA02)?
J4 connector - J1 connector
3rd pin - 9th pin
4th pin - 10th pin
5th pin - 8th pin
Replace the BA01 board (43401-BA01).
(Refer to 6.7.2.)
Is the symptom improved?
End
Replace the CA07 cable (43401-CA07).
Set the DIP switches of the tracer ASSY. (43401-
4000) properly. (Refer to 8.5.)
Replace the tracer ASSY. (43401-4000).
(Refer to 6.1.)
No
Yes
Yes
Yes
Yes
No
Yes
No
No
Replace the BA02 board (43401-BA02).
(Refer to 6.7.3.)
No

5 - 1
LLT8A*RDA001A/E
§
5 REMOVING PROCEDURE
5.1 Top Cover ASSY.
1. Unscrew SB3 × 6 (n = 4).
2. Disconnect the P501 (J1) connector from the
BA05 board (43401-BA05).
3. Remove the top cover ASSY. (43401-2000).
4. Reassemble the removed parts in reverse
order.
5.2 Cable Cover
1. Unscrew PC2 × 5 (n = 6).
2. Remove the cable cover (43401-M312).
3. Reassemble the removed parts in reverse
order.
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5.3 LCD Rear Cover
1. Unccrew PC3 × 6.
2. Remove the CF card slot cover (43401-M309).
3. Unscrew PC3 × 6 (n = 4).
4. Remove the LCD rear cover (43401-M307).
5. Reassemble the removed parts in reverse
order.
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6 - 1
LLT8A*RDA001A/E
6.1 Tracer ASSY.
Replacement part: 43401-4000
1. Remove the top cover ASSY. (43401-2000).
(Refer to 5.1.)
2. Disconnect all connectors.
3. Unscrew SB4 × 6 (n = 2) and SB4 × 8 (n = 2).
4. Replace the tracer ASSY. (43401-4000).
5. Reassemble the removed parts in reverse
order.
6. Perform tracing unit calibration. (Refer to 7.2.)
6.2 Switching Power Supply
Replacement part: 80602-00104
1. Remove the tracer ASSY. (43401-4000).
(Refer to 6.1.)
2. Unscrew SB4 × 6 (n = 3) to remove the fixing
bracket (43401-M112).
3. Disconnect all connectors from the switching
power supply (80602-00104).
4. Unscrew SB3 × 6 (n = 2) to replace the
switching power supply (80602-00104).
5. Reassemble the removed parts in reverse
order.
§
6 REPLACEMENT PROCEDURE
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6 - 2
LLT8A*RDA001A/E
6.3 Cable Assembly
Replacement part: 41971-CA07
1. Remove the tracer ASSY. (43401-4000).
(Refer to 6.1.)
2. Disconnect the CN6P connector.
3. Unscrew SB4 × 22 (n = 4) to replace the cable
assembly (41971-CA07).
4. Reassemble the removed parts in reverse
order.
6.4 Fan Assembly
Replacement part: 43401-CA14
1. Remove the LCD rear cover (43401-M307).
(Refer to 5.3.)
2. Disconnect the P108 (J8) connector from the
BA01 board (43401-BA01).
3. Unscrew PC3 × 12 (n = 4) to replace the fan
assembly (43401-CA14).
4. Reassemble the removed parts in reverse
order.
6.5 Color LCD Module
Replacement part: 40273-E020
1. Remove the LCD rear cover. (Refer to 5.3.)
2. Unscrew PT3 × 6 (n = 4).
3. Remove the LCD front cover (43401-M306).
4. Disconnect the CN1 and CN2 connectors from
the color LCD module (40273-E020) and the
J2 connector from the BA04 board (40273-
BA04).
5. Unscrew PC2 × 5 (n = 4) to replace the color
LCD module (40273-E020).
6. Reassemble the removed parts in reverse
order.
7. Perform touch panel calibration. (Refer to 7.1.)
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