Electrical Problems 1; Printer - Kyocera FS C5020N - Color LED Printer Service Manual

1-5-3 Electrical problems
Problem
(1)
"Close top cover"
display is not
cancelled to closing
the top cover.
(2)
"Close side cover"
display is not
cancelled to closing
the top cover.
Causes
Right edge of the top cover
floating, it is not closed
completely.
Defective top cover switch
2.
Defective top cover/paper
feed unit switch (SW701) of
the sensor PWB (A0001).
Defective harness (S02880)
between engine controller
PWB (A0004) and top cover
switch 2 or poor contact of
the connector terminals.
Malfunctioning interlock rod
that interfaces between the
top cover and the top cover/
paper feed unit switch
(SW701).
Defective engine controller
PWB (A0004).
Defective harness (S02849)
between engine controller
PWB (A0004) and sensor
PWB (A0001) or poor con-
tact of the connector termi-
nals.
Defective side cover switch
(SW702) of the sensor
PWB (A0001).
The actuator of the side
cover switch (SW702) of
the sensor PWB (A0001) is
bent.
Defective sensor PWB
(A0001).
Defective engine controller
PWB (A0004).
Defective harness (S02849)
between engine controller
PWB (A0004) and sensor
PWB (A0001) or poor con-
tact of the connector termi-
nals.
Check procedures/corrective measures
Close the top cover securely.
Replace the top cover switch 2.
Replace the sensor PWB (A0001).
Check the continuity of the harness (S02880), check the connec-
tion YC11 connector of the engine controller PWB (A0004), if
there is trouble, remedy or replace.
Check to see if the interlock rod malfunctions. If it malfunctions,
repair it.
Replace the engine controller PWB (A0004). See page 1-6-41.
Check the continuity of the harness (S02849), check the connec-
tion YC2 connector of the engine controller PWB (A0004), check
the connection YC701 and YC702 connectors of the sensor PWB
(A0001), if there is trouble, remedy or replace.
Replace the sensor PWB (A0001).
Check the bending of the actuator of the side cover switch, if there
is trouble, remedy or replace.
Replace the sensor PWB (A0001).
Replace the engine controller PWB (A0004). See page 1-6-41.
Check the continuity of the harness (S02849), check the connec-
tion YC2 connector of the engine controller PWB (A0004), check
the connection YC701 and YC702 connectors of the sensor PWB
(A0001), if there is trouble, remedy or replace.
2F3/2F4
1-5-21