The Cassette Heater Fails To Operate - Canon 1000 Service Manual

7. TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS
49

The cassette heater fails to operate.

Cause Step
Environment
sensor
Thermal switch
(THS4, THS6),
Cassette heater
(H4, H6)
Connector,
Wiring
7-138
COPYRIGHT © 2001 CANON INC.
Checks
1 Is there a significant discrepancy
between the temperature/humidity
indicated under 'DISP' > 'ANALOG'
in service mode and the readings of
a thermometer/hygrometer in the
room?
2 Turn OFF the power switch, and
disconnect the connector J6. Set the
meter to the ×1Ω range. Does the
index of the meter swing when the
probe of the meter is connected to
the terminals of the following con-
nectors?
Upper Cassette Heater
J6M1-1 and J6M1-3
Lower Cassette Heater
J6M2-1 and J6M2-3
3 Are the connection and the wiring
between the following connectors
normal?
J61, J62, power-saving switch, J6,
J37
Set the meter to the 12VDC range.
Yes/No
YES
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
Action
NO Replace the sensor.
NO Replace the cassette
heater.
NO Re-connect them.
Check the wiring from the
relay RL1 to the power
saving switch and SSR2;
if normal, replace SSR2.