Nidek Medical YC-1800 User manual

NIDEK
OPHTHALMIC YAG LASER SYSTEM
Model YC-1800
SERVICE MANUAL
XYC16*RDA001A/E
Total pages: 86
2005.9

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
§
1INTRODUCTIONS ...................................................................................................... 1-1
§
2CAUTIONS ................................................................................................................... 2-1
2.1 General ..................................................................................................................... 2-1
2.2 During Service .......................................................................................................... 2-1
2.3 During Laser Emission .............................................................................................. 2-1
2.4 Handling the Laser .................................................................................................... 2-2
2.5 Adjustment ................................................................................................................ 2-2
2.6 Using the Energy Meter for the YAG laser ................................................................ 2-2
§
3TROUBLESHOOTING ............................................................................................... 3-1
§
4SUB TROUBLESHOOTING ...................................................................................... 4-1
4.1 The Pilot Lamp does not Light Up. ............................................................................ 4-1
4.2 Only the Fixation Lamp does not Light Up. ............................................................... 4-2
4.3 Only the Backlight Panel does not Light Up. ............................................................. 4-2
4.4 The Error Display Appears. ...................................................................................... 4-3
4.4.1 Error 1 appears. .............................................................................................. 4-3
4.4.2 Error 5 appears. .............................................................................................. 4-3
4.4.3 Error 7 appears. .............................................................................................. 4-4
4.4.4 Error 10 appears. ............................................................................................ 4-5
4.4.5 Error 12 appears. ............................................................................................ 4-5
4.4.6 Error 13 appears. ............................................................................................ 4-5
4.4.7 Error 14 appears. ............................................................................................ 4-6
4.4.8 Error 15 appears. ............................................................................................ 4-7
4.4.9 Error 30 appears. ............................................................................................ 4-7
4.4.10 Error 31 appears. .......................................................................................... 4-8
4.4.11 Error 50 appears. .......................................................................................... 4-8
4.4.12 Error 51 appears. .......................................................................................... 4-8
4.4.13 Error 52 appears. .......................................................................................... 4-9
4.4.14 Error 53 appears. ........................................................................................ 4-10
4.4.14.1 In the case of the hand switch ......................................................... 4-10
4.4.14.2 In the case of the foot switch .......................................................... 4-10
4.4.15 Error 54 appears. ........................................................................................ 4-11
4.4.16 Error 90 appears. ........................................................................................ 4-11
4.4.17 Error 91 appears. ........................................................................................ 4-11
4.4.18 Error 93 appears. ........................................................................................ 4-11
4.4.19 Error 94 appears. ........................................................................................ 4-11
4.5 The Illumination Light is not Projected. .................................................................. 4-12
4.6 The Focusing Rod Appears Moved when the PD is Changed. ................................ 4-12
Page

4.7 The Illumination Light is not in the Center of the Visual Field
when the Magnification is 12.5×. ............................................................................ 4-13
4.8 The Focusing Rod cannot be Seen Clearly. ............................................................. 4-13
4.9 There are Some Spots in the Illumination Light. ..................................................... 4-13
4.10 The Illumination Light does not Go Out. ............................................................... 4-13
4.11 The Base does not Move Smoothly. ...................................................................... 4-14
4.12 The Base does not Go Up or Down Smoothly. ...................................................... 4-14
4.13 The Aiming Beam is not Emitted. .......................................................................... 4-15
4.14 The READY Indicator does not Light Up. ............................................................. 4-15
4.15 The Burn Pattern is not Aligned with the Aiming Beam. ....................................... 4-16
4.16 The Burn Pattern is Uneven. .................................................................................. 4-16
4.17 The Number of Pulses does not Change. ............................................................... 4-17
4.18 The COUTNER Display does not Return to 0. ...................................................... 4-17
4.19 The Energy Output Measured with the YAG Energy Meter is Abnormal. .............. 4-18
4.20 The YC-1800 does not Stop with the Emergency Stop Switch. ............................. 4-18
§
5COVER REMOVEMENT ........................................................................................... 5-1
5.1 Right and Left Covers ............................................................................................... 5-1
5.2 Base Cover A............................................................................................................ 5-1
5.3 Lower Cover ............................................................................................................. 5-1
5.4 Vertical Movement Cover ......................................................................................... 5-2
5.5 Base Cover C ............................................................................................................ 5-3
5.6 Removing the Arm Covers ........................................................................................ 5-4
§
6PARTS REPLACEMENT ............................................................................................ 6-1
6.1 Boards ...................................................................................................................... 6-1
6.1.1 Master board ................................................................................................... 6-1
6.1.2 Relay board ..................................................................................................... 6-1
6.1.3 Power supply board ........................................................................................ 6-2
6.1.4 Hand switch board .......................................................................................... 6-2
6.2 Cable Assemblies ..................................................................................................... 6-3
6.2.1 YAG shutter ..................................................................................................... 6-3
6.2.2 Aiming shutter ................................................................................................. 6-4
6.2.3 Focus shift assy. .............................................................................................. 6-5
6.2.4 Energy monitor assy. ....................................................................................... 6-5
6.2.5 Energy motor assy. .......................................................................................... 6-6
6.2.6 Aiming LD assy. .............................................................................................. 6-6
6.2.7 Key switch assy. .............................................................................................. 6-7
6.2.8 Emergency switch assy. ................................................................................... 6-7
6.2.9 Illumination control assy. ................................................................................ 6-7
Page

6.2.10 Base plate assy. ............................................................................................. 6-8
6.3 Fixation Lamp (Green) .............................................................................................. 6-8
6.4 Energy Adjustment Assy. ........................................................................................... 6-9
6.5 YAG Shutter Assy. ..................................................................................................... 6-9
6.6 Focus Assy. ............................................................................................................. 6-10
6.7 D Mirror Assy. ........................................................................................................ 6-10
6.8 LD Assy. ................................................................................................................. 6-10
6.9 Aiming Shutter Assy. ............................................................................................... 6-11
6.10 Control Board Assy. .............................................................................................. 6-11
6.11 Display Panel Assy. .............................................................................................. 6-12
6.12 Microscope ........................................................................................................... 6-12
6.13 Middle Gear ......................................................................................................... 6-13
6.14 Wheel Shaft ........................................................................................................... 6-13
6.15 Vertical Movement Screw ..................................................................................... 6-14
6.16 Brake Lever .......................................................................................................... 6-14
6.17 Joystick ................................................................................................................. 6-14
6.18 Base Plate ............................................................................................................. 6-15
6.19 Head Rest ............................................................................................................. 6-15
6.20 Lamp House .......................................................................................................... 6-16
6.21 MYLA Laser Head ................................................................................................ 6-16
6.22 Slide Plate ............................................................................................................ 6-17
6.23 Rack ...................................................................................................................... 6-17
6.24 Pinion .................................................................................................................... 6-18
6.25 Gear A .................................................................................................................. 6-18
6.26 Gear B .................................................................................................................. 6-18
§
7ADJUSTMENT ............................................................................................................. 7-1
7.1 Microscope Optical Axis .......................................................................................... 7-1
7.1.1 Binocular microscope optical axis .................................................................. 7-1
7.1.2 Microscope visual field .................................................................................. 7-1
7.2 Illumination Rotation Center ..................................................................................... 7-2
7.3 Aiming Spots ............................................................................................................. 7-3
7.3.1 LD assy. ........................................................................................................... 7-3
7.3.2 Aiming spot focus ............................................................................................ 7-3
7.3.3 Aiming spot optical axis .................................................................................. 7-4
7.4 YAG Laser Optical Axis ........................................................................................... 7-5
7.4.1 Mirror holder 3 and YAG laser head............................................................... 7-5
7.4.2 Focus assy. position ........................................................................................ 7-6
7.4.3 D mirror assy. .................................................................................................. 7-6
7.4.4 Focus adjustment ............................................................................................. 7-7
Page

7.4.5 Focus shift indication ...................................................................................... 7-8
7.5 Electric Adjustments ................................................................................................. 7-9
7.5.1 YAG laser wiring check ................................................................................... 7-9
7.5.2 Master board initial setting .............................................................................. 7-9
7.5.3 Aiming beam power output ............................................................................ 7-10
7.5.4 Agreement between the indicated and actual PFN voltages ........................... 7-11
7.5.5 PFN voltage ................................................................................................... 7-11
7.6 YAG Laser Beam Energy Output ............................................................................. 7-12
7.6.1 Maximum energy output ................................................................................. 7-12
7.6.2 Minimum energy output .................................................................................. 7-13
7.6.3 Energy Output Display ................................................................................... 7-13
7.6.3.1 Display when the energy output is 10 mJ and 1 mJ ............................ 7-13
7.6.3.2 Energy Output display and preset data setting .................................... 7-14
7.7 Energy Output Check ............................................................................................... 7-15
7.8 Air Plasma Check ................................................................................................... 7-15
7.9 Parameter Setting .................................................................................................... 7-15
7.10 Service Mode Indication ....................................................................................... 7-15
7.11 Output Adjustment Mode ....................................................................................... 7-15
7.12 Vertical Movement Base ....................................................................................... 7-16
7.13 Smart Switch Adjustment ...................................................................................... 7-16
§
8INFORMATION ........................................................................................................... 8-1
8.1 Wiring Diagram ........................................................................................................ 8-1
8.2 Connector Cable ....................................................................................................... 8-2
8.3 Appearance ............................................................................................................... 8-9
8.4 Error Message Table .............................................................................................. 8-11
8.5 Dip Switch Setting Table ........................................................................................ 8-11
8.6 Parameter Setting Tables ........................................................................................ 8-12
Page

XYC16*RDA001A/E
§1 INTRODUCTION
1 - 1
• This service manual is for the OPHTHALMIC YAG LASER SYSTEM YC-1800.
• Be sure to use this manual after understanding the operator’s manual for the OPHTHALMIC
YAG LASER SYSTEM YC-1800 thoroughly.
• Refer to the OPHTHALMIC YAG LASER SYSTEM YC-1800 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 system can not be repaired according to the procedures described in this manual,
please tell us the serial number of the system and details of the symptom or symptoms.

XYC16*RDA001A/E
1 - 2

XYC16*RDA001A/E
§2 CAUTIONS
2 - 1
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.
2.2 During Service
• Take countermeasures against static electricity before the service.
• If malfunction occurs, check the symptom and turn the power off.
• Do not lose or drop removed parts inside the YC-1800.
Prepare a case beforehand to store loose parts.
• Take care not to bump the YC-1800.
• Use suitable tools to screw or unscrew the screws.
• Apply a threadlocking adhesive to the screws which have been loosened and tightened again.
• If the YC-1800 produces smoke or strange odors, immediately turn off the system and disconnect
the electrical plug from the outlet.
Usage of the system under such abnormal conditions may cause fire or electric shock.
• Do not perform servicing with wet hands.
Doing so could cause electric shock or malfunction.
• In §3 TROUBLESHOOTING, when checking a break in a cable, also check the following
according to the wiring diagram and connector cable.
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.
2.3 During Laser Emission
• Never emit the laser beam directly on personnel or things.

XYC16*RDA001A/E
2 - 2
2.4 Handling the Laser Head
• Never disassemble or repair the laser head.
Return the laser head to NIDEK if the repair is necessary. NIDEK will not be responsible for
accidents or malfunction cause by the YC-1800 repaired by other than NIDEK.
2.5 Adjustment
• Adjust the YC-1800 on a vibration free, level, and stable surface.
Failure to do so could prevent adjustment from being performed correctly.
• Do not use adjustment jigs for other than the intended purpose.
• Since the Nd:YAG laser used in the YC-1800 is an invisible infrared ray, improper operation
may cause the hazardous exposure to radiation.
• Never face to the laser beam aperture in the laser beam path.
• Wear the safety goggles specified for the Nd:YAG laser.
• Never gaze directly the Nd:YAG laser beam even when wearing the safety goggles.
• Do not touch optical parts such as mirror or lens with bare hands.
• Never expose the laser beam to your skin.
• Take care not to receive electric shock when opening the cover to check or repair the electrical
system.
• The YAG laser uses the high voltage.
2.6 Using the Energy Meter for the YAG laser
• Depending on the energy meter to be used, the necessity of the dispersion lens, which is attached
to the objective lens at the time of energy measurement, is varied.
Refer to the table below when measuring the energy.
• The detector of the energy meter may be damaged if the excessive energy density is applied to
the photoreceptor of the detector.
Maximize the spot size of the aiming beam on the photoreceptor as possible so that the YAG
laser beam never come into focus on the photoreceptor.
Energy meter Dispersion lens
MODEL-365 Necessary
MODEL PHDX50 Unnecessary

XYC16*RDA001A/E
§3 TROUBLESHOOTING
3 - 1
Plug the power cord to the wall outlet.
Does the pilot lamp light up?
Insert the key and turn it to the ON position.
Do the fixation lamp and backlight panel light up?
Does an error display appear?
Remove the hole cap and insert the focusing rod.
Is the illumination light projected on the rod?
Adjust the diopter of the eyepieces.
Adjust the pupil distance (PD) of the microscope.
Is the optical system of the microscope normal?
4.1 The pilot lamp does not light up.
4.4 The error display appears.
4.5 The illumination light is not projected.
4.6 The focusing rod appears moved when the PD is
changed.
4.7 The illumination light is not in the center of the
visual field when the magnification is 12.5x.
4.8 The focusing rod can not be seen clearly.
Yes
Yes
Yes
No
Yes
No
Yes
No
No
Is the illumination condition normal? 4.9 There are some spots in the illumination light.
Yes
No
4.2 Only the fixation lamp does not light up.
4.3 Only the backlight panel does not light up.
No

XYC16*RDA001A/E
3 - 2
Does the slit lamp function normally?
Reduce the light amount of the slit lamp.
Is the aiming beam visible?
Does pressing the STATUS switch turn off the
STANDBY indicator and turn on the READY
indicator?
Does pressing the trigger switch emit the YAG laser
beam normally?
Does pressing the burst switch change the number of
pulses?
Does the pressing the reset switch resets the
COUNTER display to 0?
Is the emitted YAG laser beam energy normal?
4.11 The base does not move smoothly.
4.12 The base does not go up or down smoothly.
4.14 The READY indicator does not light up.
4.4 The error display appears.
4.15 The burn pattern is not aligned with the aiming
beam.
4.16 The burn pattern is uneven.
4.17 The number of pulses does not change.
4.18 The COUNTER display does not return to 0.
4.19 The energy output measured with the YAG
energy meter is abnormal.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Ｙes
No
No
No
No
No
No
4.13 The aiming beam is not emitted.
No
Does turning fully the illumination control
counterclockwise turn off the illumination light?
No 4.10 The illumination light does not go out.

XYC16*RDA001A/E
3 - 3
End
Does the pressing the emergency stop switch stop
the YC-1800?
4.20 The YC-1800 does not stop with the emergency
stop switch.
Yes
No
Turn the key switch to the OFF position and remove
it.

XYC16*RDA001A/E
3 - 4

XYC16*RDA001A/E
§4 SUB TROUBLESHOOTING
4 - 1
4.1 The Pilot Lamp does not Light Up.
Secured the required voltage.Is the required voltage applied to the wall outlet?
Is the voltage between the P10 (J10) 1st and 2nd pins on
the switching power supply (13704-E020) DC + 12 V?
Is the voltage between the J20 1st and 3rd and 2nd and 4th
pins on the base plate assy. (13706-EA17) DC + 12 V?
Is the voltage between the P401 (J401) 1st and 3rd and
2nd and 4th pins on the relay board (13706-BA04) DC
+ 12 V?
Is the voltage between the J403 4th and 5th pins on the
relay board DC + 2.0 V?
Replace the key switch assy. (13706-EA11).
(Refer to 6.2.7.)
Replace the switching power supply.
Replace the base plate assy.
(Refer to 6.2.10.)
Replace the relay board.
(Refer to 6.1.2.)
Yes
Yes
Yes
Yes
No
Yes
No
No
No
Replace the cable assy. (13706-EA16).
No

XYC16*RDA001A/E
4 - 2
4.2 Only the Fixation Lamp does not Light Up.
4.3 Only the Backlight Panel does not Light Up.
Replace the master board.
(Refer to 6.1.1.)
Is the voltage between the J101 16th and 18th and 17th and
19th pins on the master board (13706-BA01) DC + 5 V?
Is there a break in the flexible flat cable (13706-E020)?
Replace the display panel assy. (13706-1400).
(Refer to 6.11.)
Replace the flexible flat cable.
No
No
Yes
Yes
Replace the master board.
(Refer to 6.1.1.)
Is the voltage between the P113 (J113) 10th and 13th
pins on the master board (13706-BA01) DC + 12 V?
Is the voltage between the P20 12th and 15th pins on
the cable assy. (13706-EA16) DC + 12 V?
Is the voltage between the J40 1st and 2nd pins on the
base plate assy. (13706-EA17) DC + 12 V?
Replace the green fixation lamp (34405-0000).
(Refer to 6.3.)
Replace or repair the cable assy.
Replace the base plate assy.
(Refer to 6.2.10.)
Yes
Yes
No
Yes
No
No
Are there any breaks between the following connectors
in the head rest assy. (13706-EA14)?
P40 - JP1
1st pin - 1st pin (resistance: about 1.2 KΩ)
2nd pin - 2nd pin (continuity)
Repair the head rest assy. or replace the head rest
(13706-4100). (Refer to 6.19.)
No
Yes

XYC16*RDA001A/E
4 - 3
4.4 The Error Display Appears.
4.4.1 Error 1 appears.
4.4.2 Error 5 appears.
Turn the key switch to the OFF position and remove
the right and left covers. Let the YC-1800 sit for 30
minutes to cool it down.
Is the voltage between the J105 1st pin and GND on
the master board (13706-BA01) DC + 12 V when the
key switch is turned to the ON position.?
Return the YC-1800 to the factory.
Replace the master board.
(Refer to 6.1.1.)
Yes
No
Replace the master board. (Refer to 6.1.1.)
Is the voltage between the P103 (J103) 1st and 2nd
pins on the master board (13706-BA01) DC + 12 V
when the YC-1800 is in READY?
Does the solenoid of the YAG shutter function when
the YC-1800 is in READY?
Is the voltage between the P103 (J103) 3rd and 7th and
4th and 7th pins on the master board DC + 0 V or 5 V?
Is the voltage of P103 (J103) on the master board as
follows when the YAG shutter functions?
Shutter opened: 0 V between 5th and 7th pins, 5 V
between 6th and 7th pins
Shutter closed: 5 V between 5th and 7th pins, 0 V
between 6th and 7th pins
Replace the master board. (Refer to 6.1.1.)
Replace the YAG shutter assy. (13706-EA03).
(Refer to 6.2.1.)
Replace the YAG shutter assy. (Refer to 6.2.1.)
Yes
Yes
No
No
Yes
No
Yes
Replace or adjust the YAG shutter assy.
(Refer to 6.2.1.)
No

XYC16*RDA001A/E
4 - 4
4.4.3 Error 7 appears.
Replace the master board. (Refer to 6.1.1.)
Is the voltage between the P104 (J104) 1st and 2nd
pins on the master board (13706-BA01) DC + 12 V
when the YC-1800 is in READY?
Does the solenoid of the aiming shutter function when
the YC-1800 is in READY?
Is the voltage between the P104 (J104) 3rd and 5th and
6th and 5th pins on the master board DC + 0 V or 5 V?
Is the voltage of P104 (J104) on the master board as
follows when the aiming shutter functions?
Shutter opened: 0 V between 4th and 5th pins, 5 V
between 7th and 5th pins
Shutter closed: 5 V between 4th and 5th pins, 0 V
between 7th and 5th pins
Replace the master board. (Refer to 6.1.1.)
Replace the aiming shutter (13706-EA04).
(Refer to 6.2.2.)
Replace the aiming shutter. (Refer to 6.2.2.)
Yes
Yes
No
No
Yes
No
Yes
Replace or adjust the aiming shutter.
(Refer to 6.2.2.)
No

XYC16*RDA001A/E
4 - 5
4.4.4 Error 10 appears.
4.4.5 Error 12 appears.
Replace the power supply board (13733-BA01).
(Refer to 6.1.3.)
4.4.6 Error 13 appears.
Use the YC-1800 away from the instruments which may make noises.
Set DIP SW1-7 on the display board (13704-BA02)
to the OFF (upper) position. The number of pulses
appears on the COUNTER display.
Emit ten shots of the YAG laser beam.
Is 4 (number of pulses) displayed on the COUNTER
display in eight or more of ten shots?
Adjust the PFN voltage. (Refer to 7.5.4 and 7.5.5.)
Does Error10 occur?
End
Replace the master board (13706-BA01).
(Refer to 6.1.1.)
Replace the MYLA laser head (13739-0000).
(Refer to 6.21.)
No
No
Yes
Yes

XYC16*RDA001A/E
4 - 6
4.4.7 Error 14 appears.
Replace the master board (13706-BA01).
(Refer to 6.1.1.)
Does the flash lamp light up in the trigger switch on
or test fire?
Is the PFN voltage normal?
Is there a break in the YL board assy. (13706-
EA05)?
Is the TP3 (TRIG OUT) signal of the power supply
board (13733-BA01) normal when the trigger is on?
Is there a break in the YL cable assy. (13706-
EA06)?
Replace the power supply board.
(Refer to 6.1.3.)
Is the error resolved?
End
Adjust the PFN voltage. (Refer to 7.5.4 and 7.5.5.)
Replace the YL board assy.
Replace the YL cable assy.
Replace the MYLA laser head (13739-0000).
(Refer to 6.21.)
Yes
Yes
No
Yes
No
Yes
No
No
Yes
Yes
No
Replace the master board. (Refer to 6.1.1.)
No