The Mp Feed Clutch Does Not Operate; The Exposure Lamp Does Not Turn Off; The Heater Lamp Does Not Turn On; The Heater Lamp Does Not Turn Off - Kyocera KM-1820 Service Manual

Problem
(6) Broken MP feed clutch
The MP feed clutch coil.
does not operate.
Poor contact in the MP
feed clutch connector ter-
minals.
Defective engine PWB.
(7) Broken registration clutch
The registration coil.
clutch does not op-
Poor contact in the regis-
erate.
tration clutch connector
terminals.
Defective engine PWB.
(8) Poor contact in the eraser
The eraser lamp lamp connector terminals.
does not turn on.
Defective eraser lamp.
Defective engine PWB.
(9) Poor contact in the expo-
The exposure lamp sure lamp connector termi-
does not turn on. nals.
Defective scanner PWB.
Defective engine PWB.
(10) Defective scanner PWB.
The exposure lamp
does not turn off.
Defective engine PWB.
(11) Broken wire in heater
The heater lamp lamp.
does not turn on.
Thermal cutout triggered.
(12) Broken heater lamp wire.
The heater lamp
Dirty sensor part of the
does not turn off.
thermistor.
Causes
Check for continuity across the coil. If none, replace the MP feed
clutch.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check if YC5-2 on the engine PWB goes low when the MP feed
clutch is turned on. If not, replace the engine PWB.
Check for continuity across the coil. If none, replace the registra-
tion clutch.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check if YC6-2 on the engine PWB goes low when the registra-
tion clutch is turned on. If not, replace the engine PWB.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check for continuity. If none, replace the eraser lamp.
If the eraser lamp turns on when YC14-2 on the engine PWB is
held low, replace the engine PWB.
Reinsert the connector. Also check for continuity within the con-
nector cable. If none, remedy or replace the cable.
Check if the exposure lamp turns on with YC7-1 and YC7-2 on
the scanner PWB goes low. If not, replace the scanner PWB.
Check if the exposure lamp turns on with YC11-10 on the engine
PWB goes low. If not, replace the engine PWB.
Check if the exposure lamp turns on with YC7-1 and YC7-2 on
the scanner PWB goes low. If not, replace the scanner PWB.
Check if the exposure lamp turns on with YC11-10 on the engine
PWB goes low. If not, replace the engine PWB.
Check for continuity across heater lamp. If none, replace the
heater lamp.
Check for continuity across thermal cutout. If none, remove the
cause and replace the thermal cutout.
Measure the resistance. If it is ∞Ω, replace the thermistor.
Check visually and clean the thermistor sensor parts.
Check procedures/corrective measures
2GM
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