Ricoh FAX7000L, Field Service Manual

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Does the DSB output the motor drive phases?
Y N
Replace the DSB, UIB, SPU, or SCU.
Replace the motor.
Does the UIB receive a signal from the master belt home position sensor?
Y N
Does the sensor r 5V?
Y N
Trace the + 5V supply line through the machine
from the PSU to the sensor and replace the defective PCB.
Replace the sensor.
Replace the UIB, SCU, or SPU.
Main Motor Lock Fail Main Motor (Motor operation can be checked with service function 09,
mode 6).
Does the SPU r 24VD from the PSU?
Y N
Does 1POWON go high after Copy is pressed?
Y
N
Replace the SPU or SCU.
Replace the PSU, upper unit interlock switch, or right cover
interlock switch.
Does the SPU 24V at CN5-1, 2, and 3?
Y N
Replace the SPU.
Does the DRU 24V at CN2-3?
Y N
Replace the DRU.
Replace the main motor or the SPU or SCU.
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