Disassembly And Parts Replacement Procedure - Panasonic NE-C1275 Service Manual

WARNING
Never operate the oven until the following are confirmed:
(A) The door is tightly closed.
(B) There is no broken hinge or door arm.
(C) The door seal is not damagd.
(D) The door is not bent or warped.
(E) There is no other visible damage.
6.4. When parts must be replaced,
remove the power plug from
the outlet.
7 DISASSEMBLY AND PARTS REPLACEMENT
PROCEDURE
7.1. Magnetron (Front and Back)
1. Discharge the high voltage capacitors.
2. Remove 5 screws holding air guides.
3. Disconnect magnetron, lead wire connectors and grounding
lead.
4. Loosen wire harness and lift up air guide.
5. Remove 4 screws holding each magnetron.
6. Remove 2 screws holding thermal cutout.
NOTE:
To prevent microwave leakage, tighten mounting
screws making sure there is no gap between the
waveguide and the magnetron.
CAUTION
When replacing the magnetron, be sure the antenna gasket is in
place.
1. High voltage (above 250 volts) exists at following parts during
oven operation.
· Magnetron
· High Voltage Transformer
· High Voltage Diode
· High Voltage Capacitor
2. If the microwave oven is operated with incorrect installed door
hinge or magnetron, it can cause microwave leakage of over
5mW/square centimeter.
Hence it is absolutely necessary to check if magnetron and door
hinge are correctly and safety installed after repairs or
replacement.
6.5. Confirm after repair
1. After repair or replacement of parts, make sure that the
screws of the oven, etc. are neither loose nor missing.
Microwave might leak if screws are not properly tightened.
2. Make sure that all electrical connections are tight before
inserting the plug into the wall outlet.
6.6. Avoid inserting nails, wire, etc.
through holes in unit during
operation.
Never insert a wire, nail or any other metal object through the
lamp holes on the cavity or any other holes or gaps, because
such objects may work as an antenna and cause microwave
leakage.
MICROWAVE RADIATION
Personnel should not be exposed to the microwave energy which may
radiate from the magnetron or other microwave generating device if it
is improperly used or connected. All input and output microwave
connections waveguides, flanges, and gasket must be secure. Never
operate the device without a microwave energy absorbing load
attached. Never look into an open waveguide or antenna while the
device is energized.
High voltage parts may become uncovered when outer cabinet is
removed.
7.2. Digital programmer circuit
(DPC)
1. Remove 1 screw holding grounding strip tab of membrane
switch.
2. Remove 2 screws holding escutcheon base and slide the
escutcheon base upward slightly with door opened.
3. Disconnect all connectors from DPC.
4. Remove 3 screws holding DPC.
To replace membrane key board
1. Bend escutcheon A catch hooks straighten and separate
escutcheon A and base.
2. Push the upper part of key board (display window) from
back of escutcheon base and peel off membrane key
board.
15
NE-C1275 / NE-C1475
Important Note
CAUTION
CAUTION