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7.6.6 PC3: Reader Position Sensor
7.6.7 PC4: Scan Position Sensor
7.6.8 PU1: Power Unit
7.6.9 PU2: Projection Lamp Regulator
7.6.10 S1: Power Switch
1 Is the voltage across PJ8-B12 on PWB-BB
and GND 0V when the Power ON/OFF
Switch is in the ON position and the light
emitted by the Sensor LED is blocked?
→
No Replace PC3.
↓
Yes
2 Is the voltage across PJ8-B12 on PWB-BB
and GND DC5V when the light emitted by the
Sensor LED strikes the Sensor
photosensitive element?
→
No Replace PC3.
→
Yes OK
1 Is the voltage across PJ8-A6 on PWB-BB
and GND 0V when the Power ON/OFF
Switch is in the ON position and the light
emitted by the Sensor LED is blocked?
→
No Replace PC4.
↓
Yes
2 Is the voltage across PJ8-A6 on PWB-BB
and GND DC5V when the light emitted by the
Sensor LED strikes the Sensor
photosensitive element?
→
No Replace PC4.
→
Yes OK
1 Is the Fuse of PU1 blown?
→
Yes Replace Fuse.
↓
No
2 Is the output voltage of each Connector
correct when the Power Switch is in the ON
position?
→
No Replace PU1.
→
Yes OK
1 Is the Fuse of PU2 blown?
→
Yes Replace Fuse.
↓
No
2 Is the voltage across CN7-1 and CN7-2
DC17.0V when the machine is in the reader
mode?
→
No Replace PU2.
→
Yes OK
1 Are the circuits across 1 and 2, and 3 and 4
conducting when the Power Switch is
removed from the machine and in the OFF
position?
→
Yes Replace S1.
↓
No
2 Are the circuits across 1 and 2, and 3 and 4
conducting when the Switch is in the
position?
→
No Replace S1.
→
Yes OK