LG LTM9020W Service Manual page 32

(TROUBLE 6) When toaster operates, strange code can be seen on the display and stop with beep sound.
CONDITION
1. "F-1" code.
2. "F-2" code.
3. "HOT" code.
CHECK
Check continuity
of thermistor.
Check the
continuity of
heater.
Check the
connection
between CN3
connector and
PCB assembly.
Check the CN3
connector
whether 2 wire
leads are
attached.
RESULT
Defective
No continuity.
thermistor
Continuity.
No continuity. Defective heater
Continuity.
Defective PCB
Continuity.
assembly.
No continuity. Loose connection
2 wire leads are
Attached
shorted contact
Defective PCB
Seperated
assembly.
Internal
temperature is
over 220 deg c
-31-
CAUSE REMEDY
Replace thermistor
Replace toaster
Assembly.
Replace PCB
Assembly.
Connect them
tightly.
Apart 2 wire leads
as far as possible.
Replace PCB
assembly.
Allow the toaster to
cool down.
(Automatically fan
will blow for
3 minutes to cool
this unit)