Copystar CS-1820, Service Manual

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2GM
1-5-23
Problem Causes Check procedures/corrective measures
(6)
The MP feed clutch
does not operate.
(7)
The registration
clutch does not op-
erate.
(8)
The eraser lamp
does not turn on.
(9)
The exposure lamp
does not turn on.
(10)
The exposure lamp
does not turn off.
(11)
The heater lamp
does not turn on.
(12)
The heater lamp
does not turn off.
Broken MP feed clutch
coil.
Poor contact in the MP
feed clutch connector ter-
minals.
Defective engine PWB.
Broken registration clutch
coil.
Poor contact in the regis-
tration clutch connector
terminals.
Defective engine PWB.
Poor contact in the eraser
lamp connector terminals.
Defective eraser lamp.
Defective engine PWB.
Poor contact in the expo-
sure lamp connector termi-
nals.
Defective scanner PWB.
Defective engine PWB.
Defective scanner PWB.
Defective engine PWB.
Broken wire in heater
lamp.
Thermal cutout triggered.
Broken heater lamp wire.
Dirty sensor part of the
thermistor.
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.