Nidek Medical LT-980 Service Manual
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Nidek Medical LT-980 Service Manual

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Satellite Tracer
LT-980
SERVICE MANUAL
October 2012
Pages in total: 82
LLT9A*RDA002A

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Summary of Contents for Nidek Medical LT-980

  • Page 1 Satellite Tracer LT-980 SERVICE MANUAL October 2012 Pages in total: 82 LLT9A*RDA002A...

  • Page 3: Table Of Contents

    LT-980 does not Start Properly ........
  • Page 4 LLT9A*RDA002A 6. REMOVAL PROCEDURE ......31 6 . 1 Top Cover ASSY (44801-2000) ........31 7.
  • Page 5 LLT9A*RDA002A 9 . 6 Layout Drawing ..........74 9 .
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  • Page 7: Introduction

    LLT9A*RDA002A 1 INTRODUCTION This Service Manual describes repair procedures of the NIDEK Satellite Tracer, LT-980. To conduct repairs properly, thorough understanding of the contents in this manual is required prior to the service. Refer to the Operator’s Manual and Parts List for the LT-980.
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  • Page 9: Safety Precautions

    LLT9A*RDA002A 2 SAFETY PRECAUTIONS 1 . Requirements for prior contact regarding repair 1 ) When conducting repairs described in the Service Manual or Service Manual Annex, prior contact with NIDEK is not necessary. 2 ) When conducting repairs not covered in the Service Manual or Service Manual Annex, prior contact with NIDEK in writing is required.
  • Page 10 LLT9A*RDA002A * Do not yank the cables with excessive force. Doing so could cause cable break- age. * Never perform servicing with wet hands. Doing so could cause electric shock or malfunction 9 ) The labeled area indicates high voltage. Take proper precautions against electric shock.

  • Page 11: Specifications

    LLT9A*RDA002A 3 SPECIFICATIONS 1 . Tracing unit 1 ) Automatic tracing Both eyes / single eye 2 ) Semiauto tracing Both eyes / single eye 3 ) Pattern tracing 2 . Measurement range 1 ) Frame tracing a . Circumference Condition: To be measured with the standard frame of which circumference is known Error: ±0.05 mm...
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  • Page 13: Troubleshooting

    LLT9A*RDA002A 4 TROUBLESHOOTING Turn on the power switch. Does the LT-980 start properly? 5.1 LT-980 does not Start Properly (p15) Is tracing conducted properly? 5.2 Tracing cannot be Conducted Properly (p26) Is the trace data normal? 5.3 Trace Data is not Normal (p27) Can Tracer Utility be connected? 5.4 Tracer Utility cannot be Connected (p29)
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  • Page 15: Subtroubleshooting

    LLT9A*RDA002A 5 SUBTROUBLESHOOTING 5.1 LT-980 does not Start Properly Is the fan rotating? 5.1.1 Fan is not rotating (p16) Do three short beeps sound? 5.1.3 Error occurs (p20) Do four short beeps sound and all indicators above Replace the tracer ASSY (40601-0010) (see 7.1.1...

  • Page 16: Fan Is Not Rotating

    (see Are the slow-blow fuses (80402-02039) blown? 7.3.1 [p38]). Are there any breaks in the power cord of the LT- Replace the power cord of the LT-980. (see 9.3 [p69] and 9.4 [p70])? Remove the cover ASSY (44801-2000) (see 6.1 [p31]).
  • Page 17 Turn on the power switch. Are the voltages between the CN2 1st and 4th, and Replace the switching regulator (44801-E012) (see 2nd and 3rd pins of the switching regulator (44801- 7.3.3 [p40]). E012) DC 24 V ±1 V? Replace the LT-980.

  • Page 18: Initialization Is Not Conducted Properly

    LLT9A*RDA002A 5.1.2 Initialization is not conducted properly The indicator above blinks during initialization. When initialization is complete properly, the indicator above illuminates. Does the indicator above the button illuminate? 5.1.2.1 Indicator does not illuminate (p19) Turn off the power switch. Remove the top cover ASSY (44801-2000) (see [p31]).

  • Page 19: Indicator Does Not Illuminate

    LLT9A*RDA002A 5.1.2.1 Indicator does not illuminate Replace the switch sheet (44801-E030) (see 7.3.5 Is initialization conducted properly? [p42]). Turn off the power switch. Remove the top cover ASSY (44801-2000) (see [p31]). Are there any breaks in the cable ASSY (41971- Replace the cable ASSY(41971-CA06).

  • Page 20: Error Occurs

    LLT9A*RDA002A 5.1.3 Error occurs The LT-980 is not equipped with error display function. Use the Error History display function of Tracer Utility to confirm error contents (see 8.1.2 [p47]). ERROR20, ERROR51, and ERROR1000 and later occur when the tracer ASSY (40601- 0010) is defective.

  • Page 21: Error19: Trace Cancel

    LLT9A*RDA002A 5.1.3.3 ERROR19: Trace cancel Conduct tracing again. 5.1.3.4 ERROR20: H-axis encoder error The tracer ASSY (40601-0010) is defective. When repairing the tracer ASSY (40601-0010), refer to the service manual for the tracer ASSY (LETR-1). Perform the procedure as in “7.1.1 Tracer ASSY (40601-0010)” (p33). 5.1.3.5 ERROR21: No frame Is tracing conducted with no frame set? Set a frame and conduct tracing again.

  • Page 22: Error26: Pattern Trace Z-Axis Move Error

    LLT9A*RDA002A 5.1.3.8 ERROR26: Pattern trace Z-axis move error Confirm the pattern size and conduct tracing again. Is the problem resolved? Replace the tracer ASSY (40601-0010) (see 7.1.1 [p33]). 5.1.3.9 ERROR48: Stylus came off (upper) Set the frame in the center and conduct tracing Is the trace position beyond the traceable range? again.

  • Page 23: Error49: Trace Radii Error

    LLT9A*RDA002A 5.1.3.10 ERROR49: Trace radii error Is tracing conducted within the traceable range? Tracing is not possible. Conduct tracing again while holding the frame so Did the frame move during frame tracing? that it does not move. Does the frame have a sharp change in its shape? Tracing is not possible.

  • Page 24: Error51: V-Axis Encoder Error

    LLT9A*RDA002A 5.1.3.12 ERROR51: V-axis encoder error Replace the tracer ASSY (40601-0010) (see 7.1.1 [p33]). The tracer ASSY (40601-0010) is defective. When repairing the tracer ASSY (40601-0010), refer to the service manual for the tracer ASSY (LETR-1). 5.1.3.13 ERROR52: Z data start and end points error Attach the stylus (40601-7910) securely (see 7.4.1 Is the attachment of the stylus (40601-7910) loose?

  • Page 25: Error53: Shape Calculation Error

    LLT9A*RDA002A 5.1.3.14 ERROR53: Shape calculation error Does a frame, pattern, or dummy lens have a sharp Tracing is not possible. change in its shape? Set the frame in the center and conduct tracing again. Replace the tracer ASSY (40601-0010) (see 7.1.1 [p33]).

  • Page 26: Tracing Cannot Be Conducted Properly

    LLT9A*RDA002A 5.2 Tracing cannot be Conducted Properly Conduct tracing again. Is frame tracing conducted although the pattern Replace the tracer ASSY (40601-0010) (see 7.1.1 setting unit (40601-7000) is set? [p33]). Do three short beeps sound? 5.1.3 Error occurs (p20) Replace the tracer ASSY (40601-0010) (see 7.1.1 Do four short beeps sound? [p33]).

  • Page 27: Trace Data Is Not Normal

    LLT9A*RDA002A 5.3 Trace Data is not Normal Is frame tracing conducted? 5.3.1 Frame trace data is not normal (p27) Is pattern tracing conducted? 5.3.2 Pattern trace data is not normal (p28) 5.3.1 Frame trace data is not normal Attach the stylus (40601-7910) securely (see 7.4.1 Is the attachment of the stylus (40601-7910) loose? [p43]).

  • Page 28: Pattern Trace Data Is Not Normal

    LLT9A*RDA002A 5.3.2 Pattern trace data is not normal Conduct the standard pattern calibration (see 8.2.3 [p58]). Conduct full calibration (see 8.2.1 [p52]). Replace the tracer ASSY (40601-0010) (see 7.1.1 [p33]).

  • Page 29: Tracer Utility Cannot Be Connected

    LLT9A*RDA002A 5.4 Tracer Utility cannot be Connected A USB cable or RS-232C cable is used as the communication cable between the LT-980 and PC. Troubleshooting differs depending on which cable is connected. Is a USB cable connected as the communication 5.4.2 When USB cable is connected (p30)

  • Page 30: When Usb Cable Is Connected

    LLT9A*RDA002A 5.4.2 When USB cable is connected Is the USB driver installed? Install the USB driver. Turn off the power switch. Are there any breaks in the USB cable (44801- Replace the USB cable (44801-E025). E025)? Confirm the setting of Tracer Utility (refer to the service manual for the LETR-1).

  • Page 31: Removal Procedure

    LLT9A*RDA002A 6 REMOVAL PROCEDURE 6.1 Top Cover ASSY (44801-2000) 1 . Turn off the power switch and disconnect the power cord. 2 . Loosen the machine screws (82053- C308G [n = 4]). 3 . Remove the top cover ASSY (44801- 2000).
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  • Page 33: Replacement Procedure

    ASSY is mounted Shape data Trace Data Type transmission method 2 . Turn off the power switch of the LT-980. 3 . Disconnect the power cord. 4 . Replace the tracer ASSY (40601-0010). 1 ) Remove the top cover ASSY (44801-2000) (see 6.1...
  • Page 34 LLT9A*RDA002A 2 ) Disconnect P114 (J14) of the cable ASSY (41971-CA06), P115 (J15) of the cable ASSY (44801-CA04), P116 (J16) of the cable ASSY (44801-CA05), and P117 (J17) of the cable ASSY (44801-CA06) from the main board (40601-BA01) (see 9.3 [p69] and 9.5.1 [p72]).

  • Page 35: Rear Panel Assy (44801-1100)

    LLT9A*RDA002A 7.1.2 Rear panel ASSY (44801-1100) 1 . Push down the lock lever above the fuse holder (80401-00033) in the direction of the arrow as shown below and remove the fuse holder (80401-00033) along with the fuses. Lock lever Fuse holder 80401-00033 2 .

  • Page 36: Boards

    LLT9A*RDA002A 7.2 Boards 7.2.1 SW connection board (44801-BA02) Replacement part: 44801-BA02 1 . Remove the top cover ASSY (44801- 2000) (see 6.1 [p31]). 82053-C308G 2 . Disconnect J1 (P301) and J2 (P202) from the SW connection board (44801-BA02) (see 9.3 [p69] and 9.4 [p70]).

  • Page 37: Usb Board (44801-Ba03)

    LLT9A*RDA002A 7.2.2 USB board (44801-BA03) Replacement part: 44801-BA03 1 . Remove the top cover ASSY (44801- 2000) (see 6.1 [p31]). 82053-C308G 2 . Disconnect P301 of the cable ASSY (44801-CA06) from J1 on the USB board (44801- BA03) (see 9.3 [p69] and 9.4 [p70]).

  • Page 38: Electrical Parts

    7.3.1 Slow-blow fuse (80402-02039) Replacement part: 80402-02039 1 . Turn off the power switch of the LT-980. 2 . Disconnect the power cord from the power inlet. 3 . Push down the lock lever above the fuse holder (80401-00033) in the direction of the arrow as shown below and remove the fuse holder (80401-00033) along with the slow-blow fuses (80402-02039 [n = 2]).

  • Page 39: Rocker Switch (80460-00133)

    LLT9A*RDA002A 7.3.2 Rocker switch (80460-00133) Replacement part: 80460-00133 1 . Remove the top cover ASSY (44801- 2000) (see 6.1 [p31]). 82053-C308G 2 . Remove the FV terminals of the cable ASSYs (44801-CA01, 44801-CA03) connected to the rocker switch (80460-00133) (see 9.3 [p69] and 9.4 [p70]).

  • Page 40: Switching Power Supply (44801-E012)

    LLT9A*RDA002A 7.3.3 Switching power supply (44801-E012) Replacement part: 44801-E012 1 . Remove the top cover ASSY (44801- 2000) (see 6.1 [p31]). 82053-C308G 2 . Remove the rear panel ASSY (44801- 1100) (see 7.1.2 [p35]). 44801-1100 3 . Disconnect CN1 of the cable ASSY (44801-CA03) and CN2 of the cable ASSY (44801-CA04) from the switching power supply (44801-E012) (see 9.3 [p69] and 9.4...

  • Page 41: Fuse Holder (80401-00033)

    LLT9A*RDA002A 7.3.4 Fuse holder (80401-00033) Replacement part: 80401-00033 1 . Remove the top cover ASSY (44801- 2000) (see 6.1 [p31]). 82053-C308G 2 . Remove the rear panel ASSY (44801- 1100) (see 7.1.2 [p35]). 44801-1100 3 . Remove the FV terminals of the cable ASSYs (44801-CA01 and 44801-CA02) connected to the fuse holder (80401-00033) (see 9.3 [p69] and 9.4...

  • Page 42: Switch Sheet (44801-E030)

    LLT9A*RDA002A 7.3.5 Switch sheet (44801-E030) Replacement part: 44801-E030 1 . Remove the top cover ASSY (44801- 2000) (see 6.1 [p31]). 82053-C308G 2 . Disconnect P202 (J2) of the switch sheet (44801-E030) from the SW connection board (44801-BA02). 44801-BA02 3 . Peel off the switch sheet (44801-E030) from the top cover ASSY (44801-2000).

  • Page 43: Mechanical Parts

    LLT9A*RDA002A 7.4 Mechanical Parts 7.4.1 Stylus ASSY (40601-7910) Replacement part: 40601-7910 1 . Gently move the lower slider ASSY (40601-6200) to the front to open the upper slider ASSY (40601-6100) and lower slider ASSY (40601-6200). Attaching the pattern setting unit (40601-7000) makes it easier to conduct the task.
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  • Page 45: Adjustment

    PC. Never disconnect the cable during activation of Tracer Utility. 1 . Turn off the power switch of the LT-980. 2 . Connect the LT-980 and a Tracer Utility-installed PC with a RS-232C cable or USB cable. LT-980 RS-232C 3 .
  • Page 46 LLT9A*RDA002A 6 . When Tracer Utility recognizes the LT-980, the mode display in the lower-left corner of the screen becomes “LETR-1 Mode”. If Tracer Utility does not recognize the LT- 980, refer to “5.7 Tracer Utility cannot be Connected” in the service manual for the...

  • Page 47: Checking The Error Contents

    LLT9A*RDA002A 8.1.2 Checking the error contents The LT-980 is not equipped with error display function. Use the Error History function of Tracer Utility to check error contents. Perform the procedure as in “8.1.1 Con- necting and activating Tracer Utility” (p45).
  • Page 48 LLT9A*RDA002A 2 ) The lower-half area lists 10 system errors. Errors are listed in order of occurrence with the most recent on top. 4 . Exit Tracer Utility. 5 . Turn off the power switch of the LT-980.

  • Page 49: Checking The Parameter Data

    LLT9A*RDA002A 8.1.3 Checking the parameter data Perform the procedure as in “8.1.1 Con- necting and activating Tracer Utility” (p45). 2 . Select “File” → “Parameter adjustment” from the menu bar. 3 . The Manual parameter adjustment window is displayed.

  • Page 50: Changing The Parameter Data

    LLT9A*RDA002A 8.1.4 Changing the parameter data Never change the parameter data enclosed in red. 1 Frame Offset R 2 Frame Offset L Caution 3 Pattern Offset 4 Serial No. Perform the procedure as in “8.1.3 Check- ing the parameter data” (p49). 2 .
  • Page 51 LLT9A*RDA002A 4 . Click “Close” to close the Manual parame- ter adjustment window. 5 . Click “×” to exit Tracer Utility. 6 . Turn off the power switch of the LT-980.

  • Page 52: Tracer Calibration

    (see 9.8 [p77]). Standard pattern Standard frame 1 . Turn off the power switch of the LT-980. 2 . Unscrew FK2 × 3 (n = 4) to remove the Y axis cover (40601-M351) and stylus cover (40601-M108). 40601-M108...
  • Page 53 LLT9A*RDA002A Two short beeps sound and initialization starts. When the indicator above illuminates, the buttons may be released. The indicator above blinks. 5 . Set the pattern setting unit (40601-7000) 40601-7000 attached with the standard pattern (41476-M002) to the tracer. 41476-M002 6 .
  • Page 54 12. Set the pattern setting unit (40601-7000) 40601-7000 attached with the standard pattern (41476-M002) to the tracer. 41476-M002 13. Press Calibration starts. Calibration takes about 30 seconds. A short beep sounds and calibration is complete. 14. Turn off the power switch of the LT-980.
  • Page 55 LLT9A*RDA002A 15. Remove the pattern setting unit (40601- 40601-7000 7000) attached with the standard frame (41476-M002). 41476-M002 16. Reassemble the Y axis cover (40601- M351) and stylus cover (40601-M108). 40601-M108 40601-M351...

  • Page 56: Standard Frame Calibration

    Use the standard frame (40601-7500) included in the standard accessories (see 9.8 [p77]). Standard frame 1 . Turn on the power switch of the LT-980. When initialization is complete, the indica- tor above illuminates. 2 . Activate Calibration mode. 1 ) While pressing , press A short beep sounds.
  • Page 57 LLT9A*RDA002A 5 . Remove the standard frame (40601- 7500). 40601-7500 Circumference...

  • Page 58: Standard Pattern Calibration

    Use the standard pattern (41476-M002) included in the standard accessories (see 9.8 [p77]). Standard pattern 1 . Turn on the power switch of the LT-980. When initialization is complete, the indica- tor above illuminates. 2 . Activate Calibration mode. 1 ) While pressing , press A short beep sounds.
  • Page 59 LLT9A*RDA002A 4 . Set the pattern setting unit (40601-7000) 40601-7000 attached with the standard pattern (41476-M002) to the tracer. 41476-M002 5 . Press Calibration starts. When calibration is complete, a short beep sounds and the indicator above blinks. 6 . Remove the pattern setting unit (40601- 40601-7000 7000) attached with the standard frame (41476-M002).

  • Page 60: Stylus Calibration

    Use the standard frame (40601-7500) included in the standard accessories (see 9.8 [p77]). 1 . Turn off the power switch of the LT-980. 2 . Unscrew FK2 × 3 (n = 4) to remove the Y axis cover (40601-M351) and stylus cover (40601-M108).
  • Page 61 The standard frame is released. 6 . Remove the standard frame (40601- 7500). 40601-7500 Circumference 7 . Turn off the power switch of the LT-980. 8 . Reassemble the Y axis cover (40601- M351) and stylus cover (40601-M108). 40601-M108 40601-M351...

  • Page 62: Software Upgrade

    1 . Copy the LETR-1 software (LETR1-Vxxxxx.exe) to the PC. It is recommended to use a PC on which Tracer Utility is confirmed to run prop- erly. 2 . Turn off the power switch of the LT-980. 3 . Remove the top cover ASSY (44801- 2000) (see 6.1...
  • Page 63 LLT9A*RDA002A 8 . Boot up the PC and execute the LETR-1 software (LETR1-Vxxxxx.exe). FlashWriter EX is activated. 9 . Select the connection port on the PC from the Select port menu. 10. Click the START button to start the upgrade.
  • Page 64 12. Click “OK” to close the message box. 13. Click “QUIT” to exit the LETR-1 software. 14. Turn off the power switch of the LT-980. 15. Disconnect the RS-232C cable from the PC and the BAR CODE connector of the LT-980.

  • Page 65: Supplement

    LLT9A*RDA002A 9 SUPPLEMENT 9.1 Appearance 9.1.1 Top view 1 . Left-eye tracing button 2 . Both-eye tracing button 3 . Right-eye tracing button 4 . Storage cover 5 . Pattern setting unit support 6 . Upper slider 7 . Lower slider 8 .

  • Page 66: Labels

    LLT9A*RDA002A 9.2 Labels Satellite Tracer INPUT   34-4 MAEHAMA HIROISHI-CHO GAMAGORI AICHI JAPAN Satellite Tracer INPUT   34-4 MAEHAMA HIROISHI-CHO GAMAGORI AICHI JAPAN 9NNNNN SER.NO.   F1,F2   T1A250V F1 F2   WARNING Risk of fire. Replace fuse as marked. 44801-M057-A1...
  • Page 67 LLT9A*RDA002A Destination Label Fuse Outside Japan (other than CE mark area) F1,F2 T1A250V F1 F2   Outside Japan (CE mark area) WARNING Risk of fire. Replace fuse as marked. 44801-M057-A1 China...
  • Page 68 LLT9A*RDA002A Label Outside Japan 100 V Outside Japan 200 V China Standard specification Standard specification Standard specification VCA specification VCA specification VCA specification...

  • Page 69: Wiring Diagram

    LLT9A*RDA002A 9.3 Wiring Diagram...

  • Page 70: Connector Cable

    LLT9A*RDA002A 9.4 Connector Cable 1 . 44801-CA01 2 . 44801-CA02 3 . 44801-CA03 4 . 44801-CA04...
  • Page 71 LLT9A*RDA002A 5 . 44801-CA05 to 40601-BA01 to RS-232C 6 . 44801-CA06 to 44801-BA03 to 40601-BA01 7 . 41971-CA06 to 40601-BA01 to 44801-BA02 8 . 41971-CA07 CN01R to 44801-CA04...

  • Page 72: Connectors And Switches On Boards

    LLT9A*RDA002A 9.5 Connectors and Switches on Boards 9.5.1 Main board (40601-BA01) Connection terminal Connection 41971-CA06 44801-CA04 44801-CA05 44801-CA03 Switch setting Spec Protocol ID No. Server No. RATE MODE NAVIS NORMAL VCA-C 9.5.2 SW connection board (44801-BA02) Connection terminal Connection 41971-CA06 44801-E030...

  • Page 73: Usb Board (44801-Ba03)

    LLT9A*RDA002A 9.5.3 USB board (44801-BA03) Connection terminal Connection 44801-CA06 USB connector...

  • Page 74: Layout Drawing

    LLT9A*RDA002A 9.6 Layout Drawing 9.6.1 Boards (BA**) 9.6.2 Electrical parts (E**/10 digits) 44801-E030 80460-00133 80401-00033 44801-E012...

  • Page 75: Error Message List

    LLT9A*RDA002A 9.7 Error Message List Code Error message Symptom Cause Remedy No trace data There is no trace data. Tracing is not conducted. Conduct tracing. (1) Set the frame in the Trace position was center and conduct beyond the traceable tracing again.
  • Page 76 LLT9A*RDA002A Code Error message Symptom Cause Remedy Error occurred in shape Frame has a sharp Set the frame in the center Shape calculation error calculation. change in its shape. and conduct tracing again. Set a proper jig and Improper jig was used for Improper jig was used for Calibration jig error conduct full calibration...

  • Page 77: Jigs

    LLT9A*RDA002A 9.8 Jigs Part No. Name Appearance Purpose 40601-7500 Standard frame 8.2.1 Full c a l i b r a t i o n (p52) 8.2.2 Standard frame c a l i b r a t i o n (p56) 41476-M002 Standard pat- 8.2.1...

  • Page 78: Adjustment List

    LLT9A*RDA002A 9.9 Adjustment List 9.9.1 Adjustments after replacing ASSYs, boards, and electrical/ mechanical parts Replacement part ○ 8.1.1 Connecting and activating Tracer Utility (p45) ○ 8.1.2 Checking the error contents (p47) 8.1.3 Checking the parameter data (p49) ○ 8.1.3 Checking the parameter data (p49) ○...

  • Page 79: Check Sheet

     3  4  5 Frame Circ. Offset  Normal VCA DBL Value  Actual  Le 1000 Machine Mode  LT-980  LT-1200  Single Trace data Type  Double 40601-BA01 Switch settings Item Position Note  ON ...
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  • Page 82 NIDEK CO., LTD. : 34-14, Maehama, Hiroishi-cho, Gamagori, Aichi 443-0038, Japan (Manufacturer) Telephone: +81-533-67-6611 Facsimile: +81-533-67-6610 NIDEK CO., LTD : 3F Sumitomo Fudosan Hongo Bldg., 3-22-5, Hongo, (Tokyo Office) Bunkyo-Ku, Tokyo 113-0033, Japan Telephone: +81-3-5844-2641 Facsimile: +81-3-5844-2642 NIDEK INCORPORATED : 47651 Westinghouse Drive, Fremont, California 94539, U. S. A. (United States Agent) Telephone: +1-510-226-5700 Facsimile: +1-510-226-5750...

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