Panasonic NN-GS597M / NN-GS597MZPE Service Manual ▷ View online
9. Remove 2 screws holding air guide B on magnetron & on
base plate respectively, then remove air guide B.
10. Disconnect 2 lead wires from fan motor terminals.
11. Disconnect lead wires from noise filter (U) terminals.
12. Release locking tabs of reinforce bracket A hanging on both
11. Disconnect lead wires from noise filter (U) terminals.
12. Release locking tabs of reinforce bracket A hanging on both
sides of oven cavity, then withdraw the reinforce bracket A
outside slightly.
NOTE:
outside slightly.
NOTE:
Pay attention to the sharp edges of reinforce
bracket A.
bracket A.
13. Hold the reinforce bracket A, then remove 4 screws holding
magnetron.
NOTE:
After replacement of the magnetron, tighten mounting
screws properly in an x pattern, making sure there is no
gap between the waveguide and the magnetron to
prevent microwave leakage.
screws properly in an x pattern, making sure there is no
gap between the waveguide and the magnetron to
prevent microwave leakage.
CAUTION
When replacing the magnetron, be sure the antenna gasket is in
place.
place.
6.2. Digital programmer circuit
(D.P.C.) DU and low voltage
transformer
transformer
1. Remove 5 screws holding board cover & D.P.C. board DU
on the reinforce bracket A.
2. Disconnect all connectors on D.P.C. board DU.
3. Remove D.P.C. board DU.
3. Remove D.P.C. board DU.
4. Using solder wick or a desoldering tool and 30W soldering
iron carefully to remove all solder from the terminal pins of
the low voltage transformer and/or power relays.
NOTE:
the low voltage transformer and/or power relays.
NOTE:
Do not use a soldering iron or desoldering tool of
more than 30 watts on D.P.C. contacts.
more than 30 watts on D.P.C. contacts.
5. With all the terminal pins cleaned and separated from
D.P.C. contacts, remove the defective transformer/power
relays. Replace components making sure all terminal pins
are inserted completely, then resolder all terminal contacts
carefully.
relays. Replace components making sure all terminal pins
are inserted completely, then resolder all terminal contacts
carefully.
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NN-GS597M
6.3. Digital programmer circuit
(D.P.C) AU, (D.P.C.) HU,
membrane key board and
power relay
membrane key board and
power relay
CAUTION
Be sure to ground any static electric charge built up in
your body before handling the DPC.
your body before handling the DPC.
1. Remove water tank from escutcheon base.
2. Keep pressing [Steam Deforst] pad for more than 2
2. Keep pressing [Steam Deforst] pad for more than 2
seconds to drain the water remaining in the water pipes and
tubes into oven cavity.
tubes into oven cavity.
3. Pull out tube A connecting to pump from copper pipe.
4. Remove 5 screws holding board cover & D.P.C. board DU
4. Remove 5 screws holding board cover & D.P.C. board DU
on the reinforce bracket A.
5. Disconnect all connectors on D.P.C. board DU.
6. Remove D.P.C. board DU.
7. Disconnect all wiring connectors on D.P.C. board HU.
6. Remove D.P.C. board DU.
7. Disconnect all wiring connectors on D.P.C. board HU.
8. Remove 1 screw holding escutcheon base on cavity front
plate.
9. Open the door of oven, slide the escutcheon base upward
and out slightly.
10. Remove 2 flat cables connecting between D.P.C. board HU
and AU from connectors CN13 & CN20 on D.P.C. board HU
by pulling upward slightly.
by pulling upward slightly.
11. Remove 2 screws holding D.P.C. board HU on escutcheon
base, then remove D.P.C. board HU.
12. Remove 5 screws holding backstop on escutcheon base.
13. Remove 2 screws holding D.P.C. board AU (big one) on
13. Remove 2 screws holding D.P.C. board AU (big one) on
escutcheon base.
14. Release locking tabs holding D.P.C. board AU (big one) on
escutcheon base then remove 5 screws holding D.P.C.
board AU (small one) on backstop to remove D.P.C. board
AU.
board AU (small one) on backstop to remove D.P.C. board
AU.
15. Disconnect 1 flat cable connected from the membrane
keyboard to connector CN7 on the D.P.C. board AU.
To replace membrane key board
To replace membrane key board
16. Use tools such as kinfe etc. to lift the edge of escutcheon
sheet and peel off escutcheon sheet and membrane key
board completely from escutcheon base.
board completely from escutcheon base.
NOTE:
1. The membrane key board is attached to the
escutcheon base with double faced adhesive tape.
Therefore, applying hot air such as using a hair dryer is
recommended for smoother removal.
2. When installing new membrane key board, make
sure that the surface of escutcheon base is cleaned
sufficiently so that any problems (shorted contacts or
uneven surface) can be avoided.
escutcheon base with double faced adhesive tape.
Therefore, applying hot air such as using a hair dryer is
recommended for smoother removal.
2. When installing new membrane key board, make
sure that the surface of escutcheon base is cleaned
sufficiently so that any problems (shorted contacts or
uneven surface) can be avoided.
6.4. Fan motor
1. Disconnect 2 lead wires from fan motor terminals.
2. Remove 2 screws holding air guide B on magnetron & on
2. Remove 2 screws holding air guide B on magnetron & on
base plate respectively, then remove air guide B.
3. Remove 2 screws holding fan motor and detach fan motor
from oven assy.
4. Remove fan blade from fan motor shaft by pulling it straight
out.
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NN-GS597M
6.5. H.V. Inverter
1. Discharge high voltage remaining in high voltage capacitor.
2. Remove 2 screws holding reinforce bracket A on oven
2. Remove 2 screws holding reinforce bracket A on oven
cavity.
3. Remove 2 screws holding reinforce bracket B on cavity top
plate.
4. Remove 1 screw holding oven thermistor on cavity top
plate.
5. Release lead wire harness from locking tabs on Inverter
bracket A.
6. Disconnect 2 lead wires from noise filter (U) terminals.
7. Disconnect 2 lead wires from fan motor terminals.
8. Disconnect 2 high voltage lead wires from magnetron
7. Disconnect 2 lead wires from fan motor terminals.
8. Disconnect 2 high voltage lead wires from magnetron
filament terminals.
9. Unplug connector CN701 & CN702 from H.V. Inverter
board.
10. Remove 1 screw holding air guide bracket on reinforce
bracket B, then release locking tabs, detach air guide
bracket.
bracket.
11. Release locking tabs connecting Inverter bracket A with
Inverter bracket B, detach bracket A & B.
12. Remove 2 screws holding H.V. Inverter on Inverter bracket.
6.6. Upper heater
1. Disconnect lead wires from both sides of upper heater
terminals.
2. Remove 1 screw holding heater support from the left side of
microwave oven.
3. Remove the upper heater by pulling it out.
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NN-GS597M
6.7. Door assembly
1. Remove 3 screws holding right shield on the oven cavity.
2. Remove left and right door key springs from door arm with
plier.
NOTE:
NOTE:
Support door before removing door springs.
To remove door C and door A (U)
•••• Insert flat blade screwdriver to release hinge pin
from left hinge.
•••• Release catch hooks between door C and door A, to
detach the door C.
Release catch hooks.
NOTE:
NOTE:
After replacement of the defective component
parts of the door, reassemble it properly and
adjustment so as to prevent an excessive
microwave leakage. Adjustment of the door
assembly(Refer page 22).
parts of the door, reassemble it properly and
adjustment so as to prevent an excessive
microwave leakage. Adjustment of the door
assembly(Refer page 22).
3. When mounting the door to the oven, be sure to adjust the
door parallel to the cavity front plate by moving hinges back
or forward.
or forward.
4. Adjust so that the upper portion of the door will touch firmly
to the oven cavity front plate, without pushing the door.
If the door assembly is not mounted properly, microwave
power may leak from the clearance between the door and
oven.
If the door assembly is not mounted properly, microwave
power may leak from the clearance between the door and
oven.
5. Be sure the gap between left or right portion of door
assembly and cavity front plate will be 0.6±0.3mm.
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NN-GS597M
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