Sharp FACSIMILE FO-4500 Service Manual page 54

FO-4500H
3. Printer troubleshooting
1. PAPER JAM
(1) Paper jam occurred when the Power ON/OFF Switch (S1) is turned ON, or when the Upper Unit is closed.
Is there paper still inside the
machine?
Remove the paper.
(2) Paper jam occurred at the paper take-up section
YES
Was the pa-
per taken up?
NO
Does the Pa-
YES
per Take-Up
roller rotate?
NO
Does the Main Motor
(M1) operate?
NO
Replace M1,the Pow-
er Unit (PWB-E) or
PWB-A.
NO
Do the Paper Take-Up
Sensor (PC1) lever and the
Paper Exit Sensor (PC3)
YES
lever move correctly?
Correct the Sensor lever
movement.
Has the paper leading
edge already reached
the Paper Take-UP
Sensor (PC1) ?
NO
Clean the Paper Take-
Up Roller and the
Transport Roller.
Do the Paper Take-Up
YES
Solenids (SL1)
function.
Replace SL1 or
PWB-A.
YES
NO
YES
Does the Sensor lever
move correctly.
Correct the Sensor lever
movement.
YES
NO
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Replace PC1 or PC3
Replace PWB-A.
YES
NO
1. Check if the paper currently used
satisfies the specification for paper
type.
2. Check if the paper is curled,
waved,of damp.
Replace PC1 or
PWB-A.