C0650: Faulty Scanner Home Position Sensor - Minolta Di152 Service Manual

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C0650: Faulty Scanner Home Position Sensor

Scanner Motor (M5)
Scanner Home Position Sensor (PC6)
IR SECTION
Scanner
Moter
Scanner Home
Position Sensor
Step
1 Scanner Motor (M5) turns when the
Power Switch is turned ON.
2 Scanner moves smoothly.
<Check Procedure>
Gently move the Scanner by hand to
check for smooth operation.
3 Scanner Home Position Sensor
(PC6) is operational.
<Check Procedure>
Check voltage across a Control
Board (copier: PWB-C) pin and GND
when the sensor is blocked.
• Voltage across PJ18C-2 and GND
DC5 V when unblocked
DC0 V when blocked
Relevant Electrical Parts
Check
T-30
Control Board (copier: PWB-C)
PWB-C
Contorol Board
4022T531AA
Result
NO • Change Scanner Motor (M5).
NO • Remove foreign matter and other
obstacle.
• Clean the Scanner rails.
• Clean or change the Scanner bush-
ings.
• Reinstall Scanner.
NO • Change Scanner Home Position
Sensor (PC6).
YES • Change Control Board (PWB-C).
PWB-A
Master
Board
Action