Muratec MFX-2500 Field Engineering Manual page 256

(9) Smear on Back
Section Step
1 Is the Image Transfer Roller dirty?
Has toner spilled from the I/C
Printer 2
inside of the copier?
engine
3 Are the Fusing Rollers dirty?
(10) Uneven Image Density
Section Step
Is the Image Transfer Roller dirty
1
or deteriorated?
Printer
Does the image get better when a
engine
2 copy is made with new paper
loaded?
Are the mirrors, lens, Contact
1 glass or FBS glass dirty with
foreign matter?
Is the Shading Sheet under the
2
Size cover dirty?
Is the Exposure Lamp dirty or
Scanner 3
deteriorated?
Do the connections from CCD Þ
PCB AFE Þ PCB Scanner Þ
4
PCB Main Þ PCB Connect Þ
PWB-A remain intact?
(11) Gradation Reproduction Failure
Section Step
Does the image get better when a
Printer
1 copy is made with new paper
engine
loaded?
Is the Shading Sheet under the
1
Size cover dirty?
Is the Contact glass or FBS glass
2
dirty?
Scanner
Do the connections from CCD Þ
PCB AFE Þ PCB Scanner Þ
3
PCB Main Þ PCB Connect Þ
PWB-A remain intact?
Check Item
Check Item
Check Item
4-42
Result Action
YES Clean or change.
Clean the interior and change
YES
I/C.
Clean or change the Fusing
YES
Rollers.
Result Action
Clean or change the Image
YES
Transfer Roller.
Change the paper. Instruct the
YES
user on the storage of paper.
NO Change the I/C or PWB-A.
YES Clean or change.
YES Clean or change.
YES Clean or change.
Change PCB AFE, PCB
Scanner, PCB Main, PCB
YES
Connect or PWB-A, in that
order.
NO Reconnect.
Result Action
Change the paper. Instruct the
YES
user on the storage of paper.
NO Change PWB-A.
YES Clean or change.
YES Clean or change.
Change PCB AFE, PCB
Scanner, PCB Main, PCB
YES
Connect or PWB-A, in that
order.
NO Reconnect.