Inverter Power Supply (U) - Panasonic NN-H264SFR Service Manual

before handling the DPC.
(A) Using solder wick or a desoldering tool and 30W soldering iron, carefully remove all solder from
the terminal pins of the low voltage transformer and/or power relays.
NOTE:
Do not use a soldering iron or desoldering tool of more than 30 watts on
DPC contacts.
(B) With all the terminal pins cleaned and separated from DPC contacts, remove the defective
transformer/power relays making sure all terminal pins are inserted completely. Resolder all terminal
contacts carefully.

9.4. Inverter power supply (U)

CAUTIONS WHILE REPLACING INVERTER /
POWER SUPPLY (U)
1. Make sure to leave the grounding plate in its
place.
2. Make sure to securely tighten grounding screw
from the bottom of chasis (base).
3. Securely connect 3 lead wire connectors.
4. Make sure the heat sink has enough space (gap)
from the oven. Take special care not to touch any
lead wire to the aluminum heat sink because it is
hot.
1. Remove 1 screw holding orifice on the cover plate.
2. Remove 1 screw holding top front cover on the oven.
3. Remove 1 screw holding Inverter grounding plate on the oven.
4. Remove 3 screws holding Inverter bracket on top front cover.
5. Slide 2 locking of Inverter bracket at the top front cover slightly.
6. Disconnect 2 lead wires from fan motor A terminals.
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