Electrical Problems - Kyocera FS-6020 Service Manual

1-5-3 Electrical problems

Problem
(1)
Even if the top cover
is closed, the
message "Close
top cover"
remains.
(2)
Even if the rear
cover is closed, the
message "Close
rear cover"
remains.
(3)
The message
"Paper Jam"
remains.
(4)
The message
"Face-down tray
paper full"
remains.
Causes
Defective top cover
interlock switch.
Malfunctioning interlock
rod that interfaces
between the top cover and
the top cover interlock
switch.
Defective engine/high
voltage PWB.
Defective rear cover
interlock switch.
Malfunctioning rear
interlock rod that
interfaces between the
rear cover and the rear
cover interlock switch.
Defective engine/high
voltage PWB.
Paper pieces remain near
the registration sensor or
the eject sensor.
Malfunctioning actuator of
the registration sensor.
Defective registration
sensor.
Malfunctioning actuator of
the eject sensor.
Defective connection
between the eject sensor
and the engine/high
voltage PWB.
Defective eject sensor.
Defective engine/high
voltage PWB.
Malfunctioning actuator of
the face-down tray paper
full sensor.
Defective connection
between the face-down
tray paper full sensor and
the engine/high voltage
PWB.
Check procedures/corrective measures
If 24 V DC is not output to pin No. 6 of the YC4 connector on the
engine/high voltage PWB when the top cover is closed, replace
the engine/high voltage PWB. (See page 1-6-26.)
Check to see if the interlock rod malfunctions. If it malfunctions,
repair it.
Replace the engine/high voltage PWB. (See page 1-6-26.)
If 24 V DC is not output to pin Nos. 1 and 2 of the CN3
connector on the power source PWB when the rear cover is
closed, replace the power source PWB. (See page 1-6-29.)
Check to see if the rear interlock rod malfunctions. If it
malfunctions, repair it.
Replace the engine/high voltage PWB. (See page 1-6-26.)
Check the locations near the registration sensor and the eject
sensor and remove any paper pieces.
Check to see if the actuator of the registration sensor
malfunctions or is damaged. If it malfunctions, repair or replace
it.
Replace the engine/high voltage PWB. (See page 1-6-26.)
Check to see if the actuator of the eject sensor malfunctions or
is damaged. If it malfunctions, repair or replace it.
Check to see if the harness (S02828) between the eject sensor
and the engine/high voltage PWB is damaged or if the connector
YC11 of the engine/high voltage PWB is improperly connected.
If any problem is found, repair the relevant component.
If the level at pin No. 2 of the YC11 connector on the engine/
high voltage PWB remains low when the actuator of the eject
sensor is not operating, replace the eject sensor.
Replace the engine/high voltage PWB. (See page 1-6-26.)
Check to see if the actuator of the face-down tray paper full
sensor malfunctions or is damaged. If it malfunctions, repair or
replace it.
Check to see if the harness (S02815) between the face-down
tray paper full sensor and the engine/high voltage PWB is
damaged or if the connector YC13 of the engine/high voltage
PWB is improperly connected. If any problem is found, repair or
replace the relevant component.
FS-6020
1-5-17