Specifications
4-38
(1) Blank Copy
Section Step Check Item Result Action
1 Is toner empty? YES
Check Sub Hopper Toner
Empty Switch S4 and change
the Toner Bottle.
2
Is the drive transmission
mechanism to the Developing
Unit in good condition?
NO
Check and change as
necessary.
3
Is the image transfer current
terminal intact?
NO
Check and change as
necessary.
4
Does the laser shutter (the one
located on the laser beam path
between the PH Unit and PC
Drum) open and close properly?
NO
Adjust so that the shutter opens
and closes properly.
YES
Change HV1, PH Unit, or PWB-
A, in that order.
Printer
engine
5
Does the I/C Shutter open and
close properly?
NO
Adjust so that the shutter opens
and closes properly.
1
Is the Scanner drive transmission
mechanism in good condition?
NO
Check and change as
necessary.
YES
Change PCB AFE, PCB
Scanner, PCB Main, PCB
Connect or PWB-A, in that
order.
Scanner
2
Do the connections from CCD
Þ
PCB AFE
Þ
PCB Scanner
Þ
PCB Main
Þ
PCB Connect
Þ
PWB-A remain intact?
NO Reconnect.
(2) Black Copy
Section Step Check Item Result Action
1
Is the PC Drum charge voltage
terminal in good condition?
NO
Check and change as
necessary.
2
Is the grid voltage terminal in
good condition?
NO
Check and change as
necessary.
3
Is the developing bias terminal in
good condition?
NO
Check and change as
necessary.
Printer
engine
4
Does a black copy persist even
after the I/C has been replaced
with a new one?
YES Change HV1 or PWB-A.
YES Perform steps 4 and onward.
1
Does the Exposure Lamp turn ON
when make a copy with open the
platen cover?
NO
Check connectors and
harnesses and perform steps 2
and 3.
2
Does the voltage across P14 on
pin 2 and pin 3 change from
DC0V to DC24V when step 1 is
performed again?
NO Change PCB Scanner.
YES
Change Inverter or exposure
lamp, in that order.
3
Does the voltage across P14 on
pin 1 and pin 3 change to DC0V
when step 1 is performed again?
NO Change PCB Main.
4
Are the mirrors and lens installed
properly?
NO Install them properly.
Scanner
5 Are the mirrors and lens dirty? YES Clean or change.