Panasonic NN-GD576M User manual

© 2006 Panasonic Home Appliances Microwave
Oven (Shanghai) Co., Ltd. All rights reserved.
Unauthorized copying and distribution is a violation
of law.
NN-GD576M
NN-GD576W
NN-GT546W
NN-ST556M
NN-ST556W
HPE(Hong Kong)
YPQ(Singapore)
MPQ(Malaysia)
TPE(Thailand, Indonesia)
YTE(Others)
KTE(UAE)
PTE(Iran)
KPQ(Kuwait, Doha, Qatar, Oman, Bahrain, Pakistan)
STM(Saudi Arabia)
Microwave Oven
Please file and use this manual together with the service manual for Model NN-S553/K593/K573/K543
(ORDER NO. SIMMC0306022C3).
ORDER NO.PHAMOS0607033A3

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NN-GD576M / NN-GD576W / NN-GT546W / NN-ST556M / NN-ST556W /

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NN-GD576M / NN-GD576W / NN-GT546W / NN-ST556M / NN-ST556W /

1 SCHEMATIC DIAGRAM (STM) 5
2 SCHEMATIC DIAGRAM (Except STM) 6
3 CAUTIONS TO BE OBSERVED WHEN TROUBLESHOOTING
7
3.1. Check the grounding 7
3.2. Inverter warnings 7
3.3. Part replacement. 8
3.4. When the 10A fuse is blown due to the operation of the
short switch: 8
3.5. Avoid inserting nails, wire etc. through any holes in the
unit during operation. 8
3.6. Confirm after repair 8
3.7. Sharp edges 8
4 MEASUREMENTS AND ADJUSTMENTS 9
4.1. Adjustment of primary latch switch, secondary latch switch
and short switch. 9
4.2. Measurement of microwave output 9
5 EXPLODED VIEW AND PARTS LIST 10
5.1. EXPLODED VIEW 10
5.2. PARTS LIST 11
5.3. DOOR ASSEMBLY 12
5.4. WIRING MATERIALS 12
5.5. PACKING AND ACCESSORIES 13
5.6. ESCUTCHEON BASE ASSEMBLY 14
6 DIGITAL PROGRAMMER CIRCUIT 16
6.1. NN-GD576M/GD576W 16
6.2. NN-GT546W 18
6.3. NN-ST556M/ST556W 20
6.4. PARTS LIST 22
CONTENTS
Page Page
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1 SCHEMATIC DIAGRAM (STM)
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2 SCHEMATIC DIAGRAM (Except STM)
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Unlike many other appliances, the microwave oven is a high
voltage, high current device. It is free from danger in ordinary
use, though extreme care should be taken during repair.
Caution
Servicemen should remove their watches whenever
working close to or replacing the magnetron.
3.1. Check the grounding
Do not operate on a two wire extension cord. The microwave
oven is designed to be grounded when used. It is imperative,
therefore, to ensure the appliance is properly grounded before
beginning repair work.
3.2. Inverter warnings
DANGER, HIGH VOLTAGE AND HIGH TEMPERATURE
(HOT/LINE) OF THE INVERTER POWER SUPPLY (U)
The high voltage inverter power supply handles very high
voltage and current for the magnetron tube. Though it is
free from danger in ordinary use, extreme care should be
taken during repair.
The aluminum heat sink is also energized with high voltage
(HOT), do not touch when the AC input terminals are
energized. The power device Collector is directly connected
to the aluminum heat sink.
The aluminum heat sink may be HOT due to heat energy,
therefore, extreme care should be taken during servicing.
H.V. Inverter warning
WARNING FOR INVERTER POWER SUPPLY (U)
GROUNDING
Check the high voltage inverter power supply circuit
grounding. The high voltage inverter power supply circuit
board must have a proper chassis ground. The inverter
grounding bracket must be connected to the chassis. If the
inverter board is not grounded it will expose the user to very
high voltages and cause extreme DANGER! Be sure that
the inverter circuit is properly grounded via the inverter
earth bracket.
Grounding of the inverter circuit board
WARNING! DISCHARGE THE HIGH VOLATGE
CAPACITORS
For about 30 seconds after the oven is turned off, an
electric charge remains in the high voltage capacitors in the
inverter power supply circuit board.
When replacing or checking parts, remove the power plug
from the outlet and short the inverter output terminal of the
magnetron filament terminals to the chassis ground with an
insulated handle screwdriver to discharge. Please be sure
to touch the chassis ground side first and then short to the
output terminals.
Discharging the high voltage capacitors
WARNING
There is high voltage present with high current capabilities
in the circuits of the primary and secondary windings, choke
coil and heat sink of the inverter. It is extremely dangerous
to work on or near these circuits with the oven energized.
DO NOT measure the voltage in the high voltage circuit
including the filament voltage of the magnetron.
WARNING
Never touch any circuit wiring with your hand or with an
insulated tool during operation.
3 CAUTIONS TO BE OBSERVED WHEN
TROUBLESHOOTING
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3.3. Part replacement.
When any part or component is to be replaced, always ensure
that the power cord is removed from the wall outlet.
3.4. When the 10A fuse is blown
due to the operation of the
short switch:
WARNING
When the 10A 250V fuse is blown due to the operation of
the interlock monitor switch, replace all of the components
(primary latch switch, secondary latch switch, short switch
and power relay B (RY1)).
1. This is mandatory. Refer to “adjustments and
measurements” for the location of these switches.
2. When replacing the fuse, confirm that it has the
appropriate rating for these models.
3. When replacing faulty switches, be sure the mounting
tabs are not bent, broken or deficient in their ability to
hold the switches.
3.5. Avoid inserting nails, wire etc.
through any holes in the unit
during operation.
Never insert a wire, nail or any other metal object through the
lamp holes on the cavity or any holes or gaps, because such
objects may work as an antenna and cause microwave
leakage.
3.6. Confirm after repair
1. After repair or replacement of parts, make sure that the
screws of the oven, etc. are neither loose nor missing.
Microwaves 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.
3. Check for microwave energy leakage. (Refer to procedure
for measuring microwave energy leakage).
CAUTION MICROWAVE RADIATION
USE CAUTION NOT TO BECOME EXPOSED TO
RADIATION FROM THE MICROWAVE MAGNETRON OR
OTHER PARTS CONDUCTING MICROWAVE ENERGY
IMPORTANT NOTICE
The following components have potentials above 2000V
while the appliance is operated.
•Magnetron
•High voltage transformer (Located on inverter (U))
•High voltage diodes (Located on inverter (U))
•High voltage capacitors (Located on inverter (U))
Pay special attention to these areas.
When the appliance is operated with the door hinges or
magnetron installed incorrectly, the microwave leakage can
exceed more than 5mW/cm2. After repair or exchange, it is
very important to check if the magnetron and the door
hinges are correctly installed.
3.7. Sharp edges
Caution
Please use caution when unpacking, installing or moving
the unit, as some exposed edges may be sharp to the touch
and cause injury if not handled with care.
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4.1. Adjustment of primary latch
switch, secondary latch switch
and short switch.
1. Mount the Primary latch switch, the secondary latch switch
and the short switch to the door hook assembly as shown in
ILL.
NOTE:
No specific individual adjustments during
installation of the Primary latch switch, Secondary
latch switch or Short switch to the door hook are
required.
2. When mounting the door hook assembly to the oven
assembly, adjust the door hook assembly by moving it in
the direction of the arrows in the illustration, so that the
oven door will not have any play in it. Check for play in the
door by pulling the door assembly. Make sure that the latch
keys move smoothly after adjustment is completed.
Completely tighten the screws holding the door hook
assembly to the oven assembly.
3. Reconnect the short switch and check the continuity of the
monitor circuit and all latch switches again by following the
component test procedures.
4.2. Measurement of microwave
output
The output power of the magnetron can be determined by
performing IEC standard test procedures. However,due to the
complexity of IEC test procedures, it is recommended to test
the magnetron using the simple method outlined below.
Necessary Equipment:
*1 liter beaker *Glass thermometer
*Wrist watch or stopwatch
NOTE:
Check the line voltage under load.Low voltage will
lower the magnetron output. Take the temperature
readings and heating time as accurately as possible.
1. Fill the beaker with exactly one liter of tap water.Stir the
water using the thermometer and record the water’s
temperature. (recorded as T1).
2. Place the beaker on the center of glass tray.
Set the oven for High power and heat it for exactly one
minute.
3. Stir the water again and read the temperature of the water.
(recorded as T2).
4. The normal temperature rise at High power level for each
model, is as shown in table.
TABLE (1L-1min.test)
RATED OUTPUT TEMPERATURE RISE
1000W Min. 8.6°C
1100W Min. 9.4°C
4 MEASUREMENTS AND ADJUSTMENTS
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5 EXPLODED VIEW AND PARTS LIST
5.1. EXPLODED VIEW
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5.2. PARTS LIST
NOTE:
1. When ordering replacement part(s), please use part number(s) shown in this part list.
Do not use description of the part.
2. Important safety notice:
Components identified by mark have special characteristics important for safety.
When replacing any of these components, use only manufacture’s specified parts.
Ref. No. Part No. Part Name & Description Pcs/Set Remarks
1F00066V00HP CAUTION LABEL 1
6F10015Q00APG BASE 1
7F10084T00AP RUBBER FOOT 4
8F110D8J00SXP CABINET BODY 1GD576M(EXCEPT MPQ)
8F110D8J00SMP CABINET BODY 1GD576M(MPQ)
8F110D6W70HXP CABINET BODY 1GD576W,GT546W
8F110D8G80SZP CABINET BODY 1ST556M
8F110D6W80HXP CABINET BODY 1ST556W
9F200A5R50CP OVEN 1GD576M,GD576W
9F200A5R20BP OVEN 1GT546W
9F200A5Q30BP OVEN 1ST556M,ST556W
10 F20555Q00BP COVER 1
11 F21315G10XN PULLY SHAFT 1
12 F290D5Q00AP ROLLER RING (U) 1
13 F30205Q00AP DOOR HOOK 1
14 F31365Q00AP HOOK LEVER A 1
15 F400A5U00XN FAN MOTOR 1
16 F40085G10XN FAN BLADE 1
17 F40255Q00AP AIR GUIDE A 1
18 F40425Q00APG AIR GUIDE F 1
19 F612E8H00XP INCANDESCENT LAMP(U) 1
21 F41445Q00XP UPPER ORIFICE 1EXCEPT STM
21 F41445Q00AP UPPER ORIFICE 1STM
22 F42095Q00AP LOWER ORIFICE 1GD576W(STM)
23 F64505Q00APG SENSOR COVER B 1GD576M,GD576W
24 F65434W00AP SENSOR COVER C 1GD576M,GD576W
25 A707S4T00AP STEAM SENSOR 1GD576M,GD576W
26 F61425U30XN MICRO SWITCH 1V-15G-3C25 (PRIMARY LATCH SWITCH)
27 F61415U30XN MICRO SWITCH 1D3V-16G-3C25 (SECONDARY LATCH SWITCH)
28 F61785U30XN MICRO SWITCH 1D3V-1G-2C25 (SHORT SWITCH)
29 2M261-M32KLY MAGNETRON 1EXCEPT STM
29 2M261-M32J MAGNETRON 1STM
31 F62306V60BP FUSE 1(10A)
32 F62315G10XN FUSE HOLDER 1EXCEPT GD576W(STM)
33 F607X8A00BP NOISE FILTER (U) 1GD576W(STM)
34 F63265U30XN TURNTABLE MOTOR 1
35 F900C5Q00YK AC CORD W/PLUG 1EXCEPT PTE , STM & YPQ
35 F900C5Q00TN AC CORD W/PLUG 1PTE
35 F900C8G60ZP AC CORD W/PLUG 1TPE
35 F900C5G40SN AC CORD W/PLUG 1STM
35 F900C5Q00YP AC CORD W/PLUG 1YPQ
36 F606Y4V00XN H.V.INVERTER (U) 1
37 F65856W50XP INVERTER BRACKET 1EXCEPT GD576W(STM)
37 F65855R00BP INVERTER BRACKET 1GD576W(STM)
41 XTWFA4+12T SCREW 4FOR MAGNETRON
44 XTWFA4+12D SCREW 4FOR CABINET BODY
45 XTCAFA4+12AFW SCREW 1FOR CABINET BODY SIDE (GD576W,GT546W,ST556W)
45 XTCAFA4+12AFS SCREW 1FOR CABINET BODY SIDE (GD576M,ST556M)
51 F630G5R20GP HEATER (AU) 2GD576M(HPE,YTE),)GD576W (KTE,PTE,STM)
51 F630G5R60GP HEATER (AU) 2GD576M(TPE)
51 F630G5R20BP HEATER (AU) 2GD576M (MPQ,YPQ),GD576W (KPQ)
51 F630G6B80XN HEATER (AU) 2GT546W(HPE,YTE,KTE,PTE)
51 F630G5R00BP HEATER (AU) 2GT546W(MPQ)
52 F64605R00BP HEATER SUPPORT 2GD576M,GD576W,GT546W
55 F40245R00BPG EXHAUST GUIDE A 1GD576M,GD576W,GT546W
57 F01506W50XP NO TOUCHING LABEL 1GD576M,GD576W,GT546W
58 F02395E20KN CORD CAUTION LABEL 1KTE,PTE,KPQ,STM
60 F11404J60XN STOPPER 2
61 F03348G60HP MENU LABEL 1GD576M(HPE,YPQ,MPQ,YTE,TPE)
61 F03348G60KT MENU LABEL 1GD576W(KTE,PTE,KPQ,STM)
62 F00066W10MP CAUTION LABEL 1YPQ
62 F00068H00YT CAUTION LABEL 1YTE
63 F02846W10YP NO. LABEL 1GD576M(YPQ)
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Ref. No. Part No. Part Name & Description Pcs/Set Remarks
63 F02846W40YP NO. LABEL 1ST556M(YPQ)
64 F0005-6S10 EARTH LABEL 1TPE
65 F20345Q00CP REINFORCE BRACKET 1
5.3. DOOR ASSEMBLY
Ref. No. Part No. Part Name & Description Pcs/Set Remarks
D1 F30185Q00AP DOOR KEY A 1
D2 F30018G60SZP DOOR A 1GD576M,ST556M
D2 F30015Q00HBP DOOR A 1GD576W,GT546W,ST556W
D3 F302K5Q00AP DOOR E(U) 1
D4 F30215G10XN DOOR KEY SPRING 1
D5 F30855Q00AP DOOR C 1
D6 F31456V60XP DOOR SCREEN A 1
D7 F31468G60SZP DOOR SCREEN B 1GD576M,GD576W,GT546W
D7 F31468G40EP DOOR SCREEN B 1ST556M,ST556W
5.4. WIRING MATERIALS
Ref. No. Part No. Part Name & Description Pcs/Set Remarks
W1 F030A6W80XP LEAD WIRE HARNESS 1GD576M,GD576W(EXCEPT STM),GT546W
W1 F030A5R30ZP LEAD WIRE HARNESS 1GD576W(STM)
W1 F030A8G90HP LEAD WIRE HARNESS 1ST556M,ST556W
W2 F030E5Q00AP H.V.LEAD WIRE 1
W3 F03535Q00AP LEAD WIRE HARNESS U 1(INCLUDING THERMISTOR)
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5.5. PACKING AND ACCESSORIES
Ref. No. Part No. Part Name & Description Pcs/Set Remarks
P1 F00038G60HP INSTRUCTION MANUAL 1GD576M(HPE,YPQ,MPQ,YTE,TPE)
P1 F00038G60KP INSTRUCTION MANUAL 1GD576W(KTE,PTE,KPQ,STM)
P1 F00038G70HP INSTRUCTION MANUAL 1GT546W(HPE,MPQ,YTE,TPE)
P1 F00038G70KP INSTRUCTION MANUAL 1GT546W(KTE,PTE)
P1 F00038G90HP INSTRUCTION MANUAL 1ST556M(HPE,YPQ,MPQ),ST556W(MPQ,YTE,TPE)
P2 F01028G60SHP PACKING CASE,PAPER 1GD576M(HPE,YPQ,MPQ,YTE,TPE)
P2 F01028G60HKT PACKING CASE,PAPER 1GD576W(KTE,PTE)
P2 F01028G60HKP PACKING CASE,PAPER 1GD576W(KPQ,STM)
P2 F01028G70HHP PACKING CASE,PAPER 1GT546W(HPE,MPQ,YTE,TPE)
P2 F01028G70HKT PACKING CASE,PAPER 1GT546W(KTE,PTE)
P2 F01028G90SHP PACKING CASE,PAPER 1ST556M(HPE,YPQ,MPQ)
P2 F01028G90HMP PACKING CASE,PAPER 1ST556W(MPQ,YTE,TPE)
P3 F01045Q00AP UPPER FILLER 1
P4 F01055Q00AP LOWER FILLER 1
P5 F01068J00XN P.E.BAG 1
P6 F01078100XN DOOR SHEET 1
P7 F06015Q00AP COOKING TRAY 1
P8 F01924T00AP SHEET 1GD576M,ST556M,ST556M
P9 F01085R00AP RACK PACKING 1GD576M,GD576W,GT546W
P12 F060V5U00XN OVEN RACK 1GD576M,GD576W,GT546W
P13 F04458G60SMP OVERLAY 1GD576M(YPQ,MPQ)
P13 F04458G60STP OVERLAY 1GD576M(TPE)
P13 F04458G60HKT OVERLAY 1GD576W(KTE,PTE,KPQ,STM)
P13 F04458G70HMP OVERLAY 1GT546W(MPQ)
P13 F04458G70HKT OVERLAY 1GT546W(KTE,PTE)
P13 F04458G90SMP OVERLAY 1ST556M(YPQ,MPQ)
P13 F04458G90HMP OVERLAY 1ST556W(MPQ)
P13 F04458G90HTP OVERLAY 1ST556W(TPE)
P14 F000B6V70MP COOKING GUIDE 1HPE,YPQ,YTE,MPQ,TPE
P14 F000B7J70KP COOKING GUIDE 1KTE,PTE,KPQ,STM
P20 F91644000XN EARTH LEAD 1TPE
P21 F00324040XN EARTH CAUTION LABEL 1TPE
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5.6. ESCUTCHEON BASE ASSEMBLY
5.6.1. NN-GD576M, NN-GD576W
Ref. No. Part No. Part Name & Description Pcs/Set Remarks
E1 F603L8G60HP D.P.CIRCUIT(AU) 1GD576M(HPE,TPE)
E1 F603L8G60YP D.P.CIRCUIT(AU) 1GD576M(YPQ)
E1 F603L8G60YT D.P.CIRCUIT(AU) 1GD576M(YTE)
E1 F603L8G60MP D.P.CIRCUIT(AU) 1GD576M(MPQ)
E1 F603L8G60KT D.P.CIRCUIT(AU) 1GD576W(KTE,PTE)
E1 F603L8G60KP D.P.CIRCUIT(AU) 1GD576W(KPQ)
E1 F603L8G60ST D.P.CIRCUIT(AU) 1GD576W(STM)
E2 F603Y8G60YT D.P.CIRCUIT(DU) 1GD576M,GD576W
E4 F630Y8G60SHP MEMBRANE SWITCH(U) 1GD576M
E4 F630Y8G60HKT MEMBRANE SWITCH(U) 1GD576W
E5 F80348J20SXP ESCUTCHEON BASE 1GD576M
E5 F80348J20HXP ESCUTCHEON BASE 1GD576W
E6 F80728G60SZP DOOR OPENING BUTTON 1GD576M
E6 F80725Q00HAP DOOR OPENING BUTTON 1GD576W
E7 F80375K00AP COOK BUTTON SPRING 1
E8 F82565Q00AP DOOR OPENING LEVEL 1
E9 F803G8H10SXP POP-UP DIAL (U) 1GD576M
E9 F803G8H20HXP POP-UP DIAL (U) 1GD576W
E10 F66167D00AP FLAT CABLE 1GD576M,GD576W
E11 F80187D00BAP BACKSTOP 1GD576M,GD576W
E12 F00078G60SHP NAME PLATE 1GD576M (HPE)
E12 F00078G60SYP NAME PLATE 1GD576M (YPQ)
E12 F00078G60SYT NAME PLATE 1GD576M (YTE)
E12 F00078G60SMP NAME PLATE 1GD576M (MPQ)
E12 F00078G60STP NAME PLATE 1GD576M (TPE)
E12 F00078G60HKT NAME PLATE 1GD576W (KTE)
E12 F00078G60HPT NAME PLATE 1GD576W (PTE)
E12 F00078G60HKP NAME PLATE 1GD576W (KPQ)
E12 F00078G60HST NAME PLATE 1GD576W (STM)
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5.6.2. NN-GT546W, ST556M, ST556W
Ref. No. Part No. Part Name & Description Pcs/Set Remarks
E41 F603L6W20HP D.P.CIRCUIT(AU) 1GT546W(HPE,TPE)
E41 F603L6W20MP D.P.CIRCUIT(AU) 1GT546W(MPQ)
E41 F603L6W20YT D.P.CIRCUIT(AU) 1GT546W(YTE)
E41 F603L6W20KT D.P.CIRCUIT(AU) 1GT546W(KTE,PTE)
E41 F603L8G90HP D.P.CIRCUIT(AU) 1ST556M(HPE),ST556W(TPE)
E41 F603L8G90YP D.P.CIRCUIT(AU) 1ST556M(MPQ,YPQ),ST556W(YPQ)
E41 F603L8G90YT D.P.CIRCUIT(AU) 1ST556W(YTE)
E44 F630Y8G70HHP MEMBRANE SWITCH(U) 1GT546W(HPE,YTE,MPQ,TPE)
E44 F630Y8G70HKT MEMBRANE SWITCH(U) 1GT546W(KTE,PTE)
E44 F630Y8G90HYP MEMBRANE SWITCH(U) 1ST556M(HPE,MPQ,YPQ)
E44 F630Y8G90HMP MEMBRANE SWITCH(U) 1ST556W(YTE,MPQ,TPE)
E45 F80345Q00HBP ESCUTCHEON BASE 1GT546W,ST556W
E45 F80348G90SHP ESCUTCHEON BASE 1ST556M
E46 F80725Q00HAP DOOR OPENING BUTTON 1GT546W,ST556W
E46 F80728G60SZP DOOR OPENING BUTTON 1ST556M
E47 F80375K00AP COOK BUTTON SPRING 1
E48 F82565Q00AP DOOR OPENING LEVEL 1
E50 F00078G70HHP NAME PLATE 1GT546W (HPE)
E50 F00078G70HMP NAME PLATE 1GT546W (MPQ)
E50 F00078G70HYT NAME PLATE 1GT546W (YTE)
E50 F00078G70HTP NAME PLATE 1GT546W (TPE)
E50 F00078G70HKT NAME PLATE 1GT546W (KTE)
E50 F00078G70HPT NAME PLATE 1GT546W (PTE)
E50 F00078G90SHP NAME PLATE 1ST556M (HPE)
E50 F00078G90SMP NAME PLATE 1ST556M (MPQ)
E50 F00078G90SYP NAME PLATE 1ST556M (YPQ)
E50 F00078G90HMP NAME PLATE 1ST556W (MPQ)
E50 F00078G90HYT NAME PLATE 1ST556W (YTE)
E50 F00078G90HTP NAME PLATE 1ST556W (TPE)
5.6.3. H.V. INVERTER BOARD MAIN PARTS LIST (F606Y4V00XN)
Ref. No. Part No. Part Name & Description Pcs/Set Remarks
Q701
A691E4V10GP
TRANSISTOR SI 1
Q702 TRANSISTOR SI 1
DB701 AESTRS2006M DIODE SI 120A,600V
D701,D702 A62024V00GP DIODE SI 20.3A
C704,C705 ECWH30822JUA CAPACITOR 28200PF 3000VDC
T701 F609A4V00XN H.V. TRANSFORMER 1
F607D4V00XN D.P.CIRCUIT (KU) 1
L701 F50204V00XN CHOKE COIL 1
CT701 F66904V00XN CURRENT TRANSFORMER 1
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NN-GD576M / NN-GD576W / NN-GT546W / NN-ST556M / NN-ST556W /

6 DIGITAL PROGRAMMER CIRCUIT
6.1. NN-GD576M/GD576W
16
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17
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6.2. NN-GT546W
18
NN-GD576M / NN-GD576W / NN-GT546W / NN-ST556M / NN-ST556W /

19
NN-GD576M / NN-GD576W / NN-GT546W / NN-ST556M / NN-ST556W /

6.3. NN-ST556M/ST556W
20
NN-GD576M / NN-GD576W / NN-GT546W / NN-ST556M / NN-ST556W /