Cassette; Paper - Kyocera FS C5020N - Color LED Printer Service Manual

2F3/2F4
Problem
(3)
"Close paper trans-
fer unit" display is not
cancelled to closing
the paper feed unit.
(4)
"Cassette 1 not
loaded" display is not
cancelled to closing
the paper cassette.
(5)
"Check waste toner
box" display is not
cancelled to replac-
ing the waste toner
box.
1-5-22
Causes
Defective top cover/paper
feed unit switch (SW701) of
the sensor PWB (A0001).
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 cassette size
switch.
Defective sensor PWB
(A0001).
Defective harness (S02861)
between cassette size
switch and sensor PWB
(A0001) or poor contact of
the connector terminals.
Defective harness (S02849)
between engine controller
PWB (A0004) and sensor
PWB (A0001) or poor con-
tact of the connector termi-
nals.
Defective engine controller
PWB (A0004).
The waste toner full sensor
or the waste toner full sen-
sor [PWB] (KP-974) the
sensor section is dirty.
Defective harness (S02863)
between bias high voltage
PWB (KP-980) and waste
toner full sensor [PWB]
(KP-974) or poor contact of
the connector terminals.
Defective harness (S02862)
between waste toner full
sensor and waste toner full
sensor [PWB] (KP-974) or
poor contact of the connec-
tor terminals.
Defective engine controller
PWB (A0004).
Check procedures/corrective measures
Replace the sensor PWB (A0001).
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 cassette size switch.
Replace the sensor PWB (A0001).
Check the continuity of the harness (S02861), check the connec-
tion YC703 connector of sensor PWB (A0001), if there is trouble,
remedy or replace.
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 engine controller PWB (A0004). See page 1-6-41.
Replace the waste toner full sensor or the waste toner full sensor
[PWB] (KP-974).
Check the continuity of the harness (S02863), check the connec-
tion of YC802 connector of the bias high voltage PWB (KP-980),
check the connection of YC682 connector of the waste toner full
sensor [PWB] (KP-974) if there is trouble, remedy or replace.
Check the continuity of the harness (S02862), check the connec-
tion YC681 connector of the waste toner full sensor [PWB] (KP-
974), if there is trouble, remedy or replace.
Replace the engine controller PWB (A0004). See page 1-6-41.