7-23
PROBLEM -
C
:
Display does not start countdown when START key is touched.
Check: 1. TOUCH KEY BOARD (START KEY FUNCTION)
Check: 1. AIR VENTS
PROBLEM - D:
Unit operation seems to be normal but
no heating is produced in oven load.
1
1
Check continuity of connector
CN1 between Pin 11(PK) and
pin 12(BL) when the door is
closed
Continuity
OK
Check contact of
connector S1
Contact
OK
Replace
Circuit board
Correct
Correct
seating
Normal
circuit board
Normal
contact
Poor
Normal Secondary
switch
No
continuity
Adjust or replace door
sensing switch.
Runs
Runs
Runs
Check operation of fan
motor when ST
AR
T
key
is touched.
Measure resistance
of H.V
.capacitor
(see page 7-16)
Resistance
incorrect
Measure resistance
of fan motor
T
erminal
A~C: 35 to 50 ohms
T
erminal
A~B: 5 to 15 ohms
Resistance
incorrect
Replace
fan motor
Normal
circuit board
Replace
Normal
fan motor
circuit board
Normal
resistance
Replace H.V
.C.
Normal H.V
.C.
Normal
magnetron
Replace
Normal
operation
No
operation
Runs
Runs
Runs
Runs
33
Normal
resistance
33
