Kyocera FS-720 Service Manual page 58

2GL/2FV/2FW
Problem
(10)
No transfer bias is
output.
(11)
The message
requesting paper to
be loaded is shown
when paper is
present in the paper
cassette.
(12)
A paper jam in the
paper feeding/con-
veying section or
fuser section is indi-
cated when the
power switch is
turned on.
(13)
The indicator
requesting cover to
be closed is dis-
played when the top
cover is closed.
1-5-16
Causes
Poor contact of transfer
bias terminal and transfer
bias terminal (J1, J2, J3) on
the engine/high voltage
PWB.
Defective engine/high volt-
age PWB.
Defective paper sensor on
the engine/high voltage
PWB.
A piece of paper torn from
paper is caught around reg-
istration sensor or exit sen-
sor.
Defective registration sen-
sor on the engine/high volt-
age PWB.
Defective exit sensor on the
power source PWB.
Defective interlock switch
on the engine/high voltage
PWB.
Check procedures/corrective measures
See page 1-5-18, 1-6-17.
Replace the engine/high voltage PWB. See page 1-6-17.
Check and remove if any.
Replace the engine/high voltage PWB. See page 1-6-17.
Replace the power source PWB. See page 1-6-17.
Check for continuity across the interlock switch. If there is no con-
tinuity when the interlock switch is on, replace the engine/high
voltage PWB. See page 1-6-17.