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Completely blank
I - 3
Possible cause Step
DC controller 1
PCB
High-voltage
2
power supply
PCB
[Developing
bias)
DC controller
6-18
Download Service Manual and Resetter Printer at http://printer1.blogspot.com
Check
About one second
motor starts. does the voltage between
on the DC controller PCB change from
about 5 VDC to 0 V?
seconds after the main motor starts,
does the voltage between 52 1 O-9
controller PCB become about 0.76
Result
the main
NO
Y E S
NO
Procedure
Replace the DC controller
PCB.
Check whether the high-
voltage contact Is making
good contact with the
developing bias contact of
the cartridge. If it is, replace
the high-voltage power
supply PCB. If the problem
persists after replacing the
PCB, check by using the
laser malfunction diagnosis
flowchart tn Section 111 C.
Replace the DC controller
PCB. If the problem persist:
after replacing the PCB,
check by using the laser
malfunction diagnosis
flowchart in Section III C.
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Table of Contents
Troubleshooting
