The Exposure Lampdoes Not Turn Off; The Fixing Heater Does Not Turn On (C6000); The Fixing Heater Does Not Turn Off - Kyocera KM-2550 Service Manual

2FT-3.0
Problem
(13)
The bypass paper
feed solenoid does
not operate.
(14)
The drawer paper
feed clutch doesnot
operate.
(15)
The cleaning lamp
does not turn on.
(16)
The exposure lamp-
does not turn on.
(17)
The exposure lamp-
does not turn off.
(18)
The fixing heater
does not turn on
(C6000).
(19)
The fixing heater
does not turn off.
1-5-36
Causes
Broken bypass paper feed
solenoid coil.
Poor contact in the bypass
paper feed solenoid con-
nector terminals.
Defective engine PCB.
Broken drawer paper feed-
clutch coil.
Poor contact in the drawer-
paper feed clutch connec-
torterminals.
Defective engine PCB.
Poor contact in the cleaning
lamp connector terminals.
Defective cleaning lamp.
Defective engine PCB.
Poor contact in the expo-
sure lamp connector termi-
nals.
Defective inverter PCB.
Defective engine PCB.
Defective inverter PCB.
Defective engine PCB.
Broken wire in fixing heater
M or S.
Fixing thermostat triggered.
Broken fixing thermistor
wire.
Dirty sensor part of the fix-
ing thermistor.
Check procedures/corrective measures
Check for continuity across the coil. If none, replace the bypass
paper feed solenoid.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Run maintenance item U032 and check if YC8-5 on the engine
PCB goes low. If not, replace the engine PCB.
Check for continuity across the coil. If none, replace the drawer
paper feed clutch.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Run maintenance item U032 and check if YC8-3 on the drawer
main PCB goes low. If not, replace the drawer main PCB.
Reinsert the connector. Also check for continuity within the con-
nectorcable. If none, remedy or replace the cable.
Check for continuity. If none, replace the cleaning lamp.
If the cleaning lamp turns on when YC3-12,13,14 on the engine
PCB is held low, replace the engine PCB.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Run maintenance item U061 and check if the exposure lamp turns
on with YC1-1 and YC1-6 on the inverter PCB go low. If not,
replace the inverter PCB.
Run maintenance item U061 and check if YC17-1 and YC17-6 on
the engine PCB goes low. If not, replace the engine PCB.
If the exposure lamp does not turn off with YC1-1 and YC1-6 on
the inverter PCB high, replace the inverter PCB.
If YC17-1 and YC17-6 on the engine PCB are always low, replace
the engine PCB.
Check for continuity across each heater. If none, replace the
heater M or S.
Check for continuity across thermostat. If none, remove the cause
and replace the thermostat.
Measure the resistance. If it is ∞ Ω, replace the fixing thermistor.
Check visually and clean the thermistor sensor parts.