Panasonic NN-GS597M / NN-GS597MZPE Service Manual ▷ View online
6.8. Pump
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. Disconnect all wiring connectors from D.P.C board AU.
5. Remove 1 grounding screw holding on cavity front plate.
6. Open the door of oven, slide the escutcheon base upward
4. Disconnect all wiring connectors from D.P.C board AU.
5. Remove 1 grounding screw holding on cavity front plate.
6. Open the door of oven, slide the escutcheon base upward
and out slightly.
7. Pull out tube B from inlet of pump.
8. Remove 2 screws holding pump bracket on escutcheon
8. Remove 2 screws holding pump bracket on escutcheon
base.
9. Slide out pump bracket from bottom rail of escutcheon
base.
10. Slightly uplift the pump over the locking tabs on the pump
bracket, then slide the pump out.
11. Pull out tube A from outlet of pump.
To install pump
1. Insert pump into pump bracket (Inlet of pump must be
aligned toward the harness clasp of pump bracket).
2. After installation confirm that the pump is properly
aligned.
NOTE:
To prevent tube A from slipping out after repairing,
make sure that when inserting tube A into copper
pipe, the inserted depth is not less than 9mm.
make sure that when inserting tube A into copper
pipe, the inserted depth is not less than 9mm.
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NN-GS597M
6.9. IR sensor
1. Disconnect connector CN5 from D.P.C. board HU.
2. Remove 1 screw holding IR sensor (U) on right heater
2. Remove 1 screw holding IR sensor (U) on right heater
panel.
To replace swing motor of IR sensor
1. Release the locking lever of connector on swing motor,
then remove drive line.
2. Remove 2 screws holding swing motor on motor
mounting plate.
3. Remove swing motor from IR sensor assy.
6.10. Stirrer motor
1. Remove the motor cover by breaking off at the 8 spots
indicated by arrows with a cutter or the like.
NOTE:
After removing the motor cover, be sure that cut
portions are properly trimmed or bent to the Inside
so that no sharp edges will be exposed to outside.
portions are properly trimmed or bent to the Inside
so that no sharp edges will be exposed to outside.
2. Disconnect 2 lead wires from stirrer motor terminals.
3. Remove 2 screws holding stirrer motor.
3. Remove 2 screws holding stirrer motor.
NOTE:
After reinstalling the new stirrer motor and
reconnecting the 2 lead wires, reinstall the motor
cover by rotating it around 180, tucking the 2 tabs
under the base in the 2 provided slots, then screw
the single tab to the base using a screw.
reconnecting the 2 lead wires, reinstall the motor
cover by rotating it around 180, tucking the 2 tabs
under the base in the 2 provided slots, then screw
the single tab to the base using a screw.
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NN-GS597M
6.11. Heater DU (steam heater)
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. Remove tubes from both ends of copper pipe.
4. Remove 1 screw holding air guide B on the base.
5. Release catch of nozzle holding copper pipe.
4. Remove 1 screw holding air guide B on the base.
5. Release catch of nozzle holding copper pipe.
6. Remove left and right door key springs from door arm.
NOTE:
Support door before removing door springs.
7. Turn over the microwave oven and remove all screws
holding base on oven assy & two hinges.
NOTE:
NOTE:
Do not remove the two screws holding the left and
right hinges on the bottom of cavity front plate.
right hinges on the bottom of cavity front plate.
8. Remove base from oven assy.
9. Disconnect 2 lead wires from heater DU terminals.
10. Remove 1 screw holding thermistor on heater DU.
9. Disconnect 2 lead wires from heater DU terminals.
10. Remove 1 screw holding thermistor on heater DU.
11. Remove 6 screws holding heater DU & thermal cutout
bracket on the bottom of oven assy.
To install heater DU
NOTE:
1.Spread
silicon
grease
evenly
between
the
interface of heater DU and bottom of oven cavity.
(about
(about
0.3mm
thickness),
this
is
for
good
conductibility.
2.Tighten 6 screws and make sure there is no gap
between heater DU and bottom of oven cavity.
3.Do not forget to screw the thermal cutout bracket
along with heater Du.
2.Tighten 6 screws and make sure there is no gap
between heater DU and bottom of oven cavity.
3.Do not forget to screw the thermal cutout bracket
along with heater Du.
To install thermistor
NOTE:
Before installing thermistor, please fill enough
silicon grease into the installation hole of heater DU
for good conductibility.
silicon grease into the installation hole of heater DU
for good conductibility.
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NN-GS597M
WARNING
1. High voltage is present at the output terminals of the High Voltage
Inverter (U) including aluminum heat sink during any cook cycle.
2. It is neither necessary nor advisable to attempt measurement of the
high voltage.
3. Before touching any oven components, or wiring, always unplug
the power cord and discharge the high voltage capacitors.
Inverter (U) including aluminum heat sink during any cook cycle.
2. It is neither necessary nor advisable to attempt measurement of the
high voltage.
3. Before touching any oven components, or wiring, always unplug
the power cord and discharge the high voltage capacitors.
7.1. Primary latch switch
Secondary Latch switch and
power relay RY3
power relay RY3
1. Unplug lead connectors to Power Relay RY3 and verify
open circuit of the Power Relay RY3 (1-2) terminals.
2. Unplug lead connectors to Primary Latch Switch and
Secondary Latch Switch.
3. Test the continuity of switches at door opened and closed
positions with ohm meter (low scale).
Normal continuity readings should be as follows.
Normal continuity readings should be as follows.
Door Closed
Door Opened
Primary Latch Switch
0
Ω (Close)
Ω(Open)
Secondary Latch Switch
0
Ω (Close)
Ω(Open)
Power Relay RY3
Ω (Open)
Ω(Open)
7.2. Short switch & monitor
1. Unplug lead wires from Inverter Power Supply (U) primary
terminals.
2. Connect test probes of ohm meter to the disconnected
leads that were connected to Inverter Power Supply (U).
3. Test the continuity of short switch with door opened and
closed positions using lowest scale of the ohm meter.
Normal continuity readings should be as follows.
Normal continuity readings should be as follows.
Door Opened
Door Closed
0
Ω (Close)
Ω(Open)
7.3. Magnetron
Continuity checks can only indicate an open filament or a
shorted magnetron. To diagnose for an open filament or
shorted magnetron.
1. Isolate magnetron from the circuit by disconnecting the
shorted magnetron. To diagnose for an open filament or
shorted magnetron.
1. Isolate magnetron from the circuit by disconnecting the
leads.
2. A continuity check across magnetron filament terminals
should indicate one ohm or less.
3. A continuity check between each filament terminal and
magnetron case should read open.
7.4. Membrane key board
(Membrane switch assembly)
Check continuity between switch terminals, by tapping an
appropriate pad on the key board. The contacts assignment of
the respective pads on the key board is as shown in digital
programmer circuit.
appropriate pad on the key board. The contacts assignment of
the respective pads on the key board is as shown in digital
programmer circuit.
7 COMPONENT TEST PROCEDURE
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NN-GS597M
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