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1 I - 10
Blank spots
1
4
E P - E c a r t r i d g e
High-voltage
5
power supply
I'CB
(Developing
bias)
DC controller
PCB.
1
Is the recommended paper being used?
Is the transfer charging roller dirty or
deformed?
Does the print quality improve when
the cartridge Is replaced7
Perform a test print. About five seconds
after the main motor starts, does the
voltage between 5210.9 (SLOZ) and
J2 1 O- 10 (GNDI on the DC controller
PCB become about 0.76 VDC?
CHAPTER 6
Replace the paper. Instruct
the customer to wrap and
store the paper to prevent it
from becomlng damp.
YES Replace the
KlllW.
Y E S
Replace the cartridge.
YES
Check whether the hlgh-
voltage contact is making
good contact with the
developing bias contact of
the cartridge. If it is. replace
the high-voltage power
supply PCB.
NO
Replace the DC controller
PCB.
6-23
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