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Troubleshooting
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7.6 Electrical Components Check
7.6.1 LA1: Projection Lamp
7.6.2 M3: Power Unit Cooling Fan Motor
7.6.3 M4: Projection Lamp Cooling Fan Motor
7.6.4 PC1: Image Leading Edge Sensor
7.6.5 PC2: Scan Mirror Position Sensor
1 Is the circuit across both terminals of the
Lamp conducting when the Lamp is removed
from the machine?
→
No Replace LA1.
→
Yes OK
1 Does the Motor start rotating when the Power
ON/OFF Switch is turned ON?
→
Yes OK
↓
No
2 Is the voltage across CN10-1 and GND
DC24V with the Power Switch in the ON
position?
→
No Check wiring.
→
Yes Replace M3.
1 Does the Motor start rotating when the Power
ON/OFF Switch is turned ON?
→
Yes OK
↓
No
2 Is the voltage across CN18-1 and GND
DC24V with the Power ON/OFF Switch in the
ON position?
→
No Check wiring.
→
Yes Replace M4.
1 Is the voltage across PJ8-A3 on PWB-BB
and GND 0V when the Power Switch is in the
ON position and the light emitted by the
Sensor LED is blocked?
→
No Replace PC1.
↓
Yes
2 Is the voltage across PJ8-A3 on PWB-BB
and GND DC5V when the light emitted by the
Sensor LED strikes the Sensor
photosensitive element?
→
No Replace PC1.
→
Yes OK
1 Is the voltage across PJ8-B15 on PWB-BB
and GND 0V when the Power Switch is in the
ON position and the light emitted by the
Sensor LED is blocked?
→
No Replace PC2.
↓
Yes
2 Is the voltage across PJ8-B15 on PWB-BB
and GND DC5V when the light emitted by the
Sensor LED strikes the Sensor
photosensitive element?
→
No Replace PC2.
→
Yes OK