2BT
1-5-21
Problem
Causes
Check procedures/corrective measures
(15)
Transfer charging is
not performed.
(16)
No developing bias
is output.
(17)
A paper jam in the
paper feed, paper
conveying or fixing
section is indicated
when the main
switch is turned on.
(18)
The message
requesting covers to
be closed is
displayed when the
front cover and
paper conveying
cover are closed.
(19)
Others.
Poor contact in the high-
voltage transformer PCB
connector terminals.
Defective main PCB.
Defective high-voltage
transformer PCB .
Poor contact in the
developing bias wire.
Poor contact in the high-
voltage transformer PCB
connector terminals.
Defective main PCB.
Defective high-voltage
transformer PCB .
A piece of paper torn from
copy paper is caught
around the registration
switch or eject switch.
Defective registration
switch.
Defective eject switch.
Poor contact in the
connector terminals of
safety switch.
Defective safety switch.
Wiring is broken, shorted
or makes poor contact.
Noise.
See page 1-5-12.
See page 1-5-18.
Check and remove if any.
With 5 V DC present at CN3-14 on the main PCB, check if CN3-
3 on the main PCB remains low when the registration switch is
turned on and off. If it does, replace the registration switch.
With 5 V DC present at CN11-6 on the main PCB, check if
CN11-5 on the main PCB remains low when the eject switch is
turned on and off. If it does, replace the eject switch.
Reinsert the connector. Also check for continuity within the
connector cable. If none, remedy or replace the cable.
Check for continuity across the contacts of the switch. If there is
no continuity when the switch is on, replace it.
Check for continuity. If none, repair.
Locate the source of noise and remove.
