Muratec MFX-2500 Field Engineering Manual page 254

Section Step
Do the connections from PCB
5 Scanner to PCB Main remain
intact?
Do the connections from PCB
6 Main to PCB Connect remain
Scanner intact?
Do the connections from PCB
7 Connect to PWB-A Connect
remain intact?
(5) Black Streaks or Bands
Section Step
1 Is the PC Drum dirty?
Has toner spilled from the I/C
2
inside of the copier?
Is the PC Drum charge voltage
3
Printer terminal in good condition?
engine Is the grid voltage terminal in
4
good condition?
Are the Fusing Rollers dirty with
5
foreign matter?
Are the mirrors, lens, Contact
1 glass or FBS glass dirty with
foreign matter?
Do the connections from CCD Þ
Scanner
PCB AFE Þ PCB Scanner Þ
2
PCB Main Þ PCB Connect Þ
PWB-A remain intact?
(6) Black Spots
Section Step
1 Is the PC Drum dirty?
Has toner spilled from the I/C
2
inside of the machine?
Is the PC Drum charge voltage
3
terminal in good condition?
Printer
engine Is the grid voltage terminal in
4
good condition?
Are the Fusing Rollers dirty with
5
foreign matter?
Are the mirrors, lens, Contact
1 glass or FBS glass dirty with
foreign matter?
Do the connections from CCD Þ
Scanner
PCB AFE Þ PCB Scanner Þ
2
PCB Main Þ PCB Connect Þ
PWB-A remain intact?
Check Item
Check Item
Check Item
4-40
Result Action
NO Reconnect.
NO Reconnect.
Change INVERTER, PCB
Scanner, PCB Main, PCB
YES
Connect or PWB-A, in that
order.
NO Reconnect.
Result Action
YES Clean the PC Drum.
Clean the interior and change
YES
I/C.
Check and change as
NO
necessary.
Check and change as
NO
necessary.
Clean or change the Fusing
YES
Rollers.
NO Change I/C.
YES Clean.
Change PCB AFE, PCB
Scanner, PCB Main, PCB
YES
Connect or PWB-A, in that
order.
NO Reconnect.
Result Action
YES Clean the PC Drum.
Clean the interior and change
YES
I/C.
Check and change as
NO
necessary.
Check and change as
NO
necessary.
Clean or change the Fusing
YES
Rollers.
NO Change I/C.
YES Clean.
Change PCB AFE, PCB
Scanner, PCB Main, PCB
YES
Connect or PWB-A, in that
order.
NO Reconnect.