GE JS998 Series - Lamp and Microwave Failures Troubleshooting; Halogen Lamp Not Working Troubleshooting

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Halogen Lamp Does Not Work
Enter the service mode and
turn the oven lights on.
Are the lights on?
No
Remove the halogen bulbs.
Is 120 VAC present from the MPB
relay K13 NO contact to AC IN (NT)?
Yes
No
Is 120 VAC present from the MPB
relay K13 NO contact to the EMI
filter board IN2 contact?
Yes
Is 120 VAC present from the MPB
relay K13 NO contact to the EMI
filter board OUT2 contact?
Yes
Is 120 VAC present from the
MPB relay K13 NO contact to
the halogen lamp sockets?
Yes
Is 120 VAC present from the positive
contact to the negative contact of the
halogen lamp sockets?
Yes
Replace the
halogen bulb.
Is 120 VAC present from
the MPB relay K13 COM
contact to AC IN (NT)?
Yes
Is 0 VDC present from
the MLB connectors
J3, pin 4 to J5, pin 2?
Yes
No
Is 120 VAC present from
the EMI filter board OUT1
contact to AC IN (NT)?
No
Is 120 VAC present from
the EMI filter board IN1
contact to AC IN (NT)?
No
Repair the faulty
wiring from L1 input to
the EMI filter board.
Repair the faulty wiring from NT
input to the EMI filter board.
No No
Replace the
EMI filter board.
Repair the faulty wiring
from the EMI filter board
to the lamp sockets.
No
Repair the faulty wiring from
the MLB relay K13 NO
contact to the lamp sockets.
No
No
Replace
the MLB.
Replace
the MPB.
Repair the faulty wiring from
the MPB relay K13 COM
contact to the EMI filter board.
Yes
Replace the EMI
filter board.
Yes