Service Call
SM
6-3
M156/M157/M176/M177
T
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u
b
le
s
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ti
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Polygon motor/driver board harness loose or disconnected
Polygon motor/driver board defective
Laser optics unit defective
1. Turn the machine main power off/on.
2. Replace the interface harness of the laser optics unit.
3. Replace the laser optics unit.
220
Beam Synchronize error
The laser synchronizing detection signal for LD is not output within 400msec after
the LD unit has turned on.
Disconnected cable from the laser synchronizing detection unit or defective
connection
Defective laser synchronizing detector
Defective LD
Defective Main board
1. Check the connectors.
2. Replace the laser optics unit.
3. Replace the Main board.
268
Laser Scanning Unit thermistor error
At power on, the temperature sensor in the optics unit detected a temperature
lower than -30°C for more than 4 sec.
-or-
It detected a temperature higher than 105°C for more than 1sec.
Thermistor disconnected (causes extremely low temperature reading)
Thermistor damaged and short circuited (causes extremely high temperature
reading)
1. Turn the machine's main power off, and then on.
2. Replace the thermistor.
Summary of Contents for M156
Page 1: ...M156 M157 M176 M177 SERVICE MANUAL ...
Page 14: ...PRODUCT INFORMATION REVISION HISTORY Page Date Added Updated New None ...
Page 19: ...INSTALLATION REVISION HISTORY Page Date Added Updated New None ...
Page 22: ...PREVENTIVE MAINTENANCE REVISION HISTORY Page Date Added Updated New None ...
Page 29: ...REPLACEMENT AND ADJUSTMENT REVISION HISTORY Page Date Added Updated New None ...
Page 87: ...SERVICE TABLES REVISION HISTORY Page Date Added Updated New None ...
Page 116: ...TROUBLESHOOTING REVISION HISTORY Page Date Added Updated New None ...
Page 136: ...ENERGY SAVE REVISION HISTORY Page Date Added Updated New None ...
Page 143: ...M156 M157 M176 M177 SERVICE MANUAL APPENDICES ...
Page 145: ...APPENDIX SPECIFICATIONS REVISION HISTORY Page Date Added Updated New None ...
Page 154: ...ERROR MESSAGES REVISION HISTORY Page Date Added Updated New None ...