Panasonic NN-T704QF User manual

ORDERNO.SIMMC0407020A3
Microwave Oven
NN-T794AF / NN-T784SF / NN-T704QF / NN-T774SF / NN-
S784BF / NN-S784WF / NN-S754BF / NN-S754WF
QPQ(Australia&New Zealand)
Please fileand use thismanual together with the service manual for
Model NN-S560WF (ORDERNO. SIMMC0006012C3)
SPECIFICATIONS
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2004 PanasonicHome Appliances Microwave Oven (Shanghai)
Co., Ltd. / All rights reserved. Unauthorized copying and
distribution isaviolation of law.
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1. SCHEMATIC DIAGRAM
2. CAUTIONS TO BE OBSERVED WHEN
TROUBLESHOOTING
Unlike manyotherappliances, the microwave ovenis a high voltage, high current device. It is
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free fromdangerinordinaryuse, though extreme care shouldbe takenduring repair.
Caution
Servicemen shouldremove theirwatches whenever working close
to or replacing the magnetron.
2.1. Check the grounding
Donot operate on a twowire extension cord. The microwave ovenis designedtobe grounded
whenused. It is imperative, therefore, toensure the appliance is properlygroundedbefore
beginning repairwork.
2.2. Inverter warnings
DANGER, HIGH VOLTAGE AND HIGH TEMPERATURE (HOT/LINE) OFTHE INVERTER POWER
SUPPLY (U)
The high voltage inverter power supplyhandles veryhigh voltage
and current for the magnetron tube. Though itisfree from danger
inordinaryuse, extreme care shouldbe taken during repair.
The aluminum heat sink isalso energized with high voltage (HOT),
do not touch when the AC input terminalsare energized. The power
device Collector isdirectlyconnected to the aluminum heat sink.
The aluminum heat sink maybe HOTdue to heat energy, therefore,
extreme care shouldbe taken during servicing.
H.V. Inverterwarning
WARNING FOR INVERTER POWER SUPPLY (U) GROUNDING
Check the high voltage inverter power supplycircuitgrounding.
The high voltage inverter power supplycircuitboard must have a
proper chassisground. The inverter grounding bracket must be
connected to the chassis. Ifthe inverter board isnot grounded it
will expose the user to veryhigh voltages and cause extreme
DANGER!Besure that the inverter circuitisproperlygrounded via
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the inverter earth bracket.
Grounding of the invertercircuit board
WARNING!DISCHARGE THE HIGH VOLATGE CAPACITORS
For about 30 seconds after the oven isturned off, an electriccharge
remains inthe high voltage capacitors inthe inverter power supply
circuitboard.
When replacing or checking parts, remove the power plug from the
outlet and short the inverter output terminal of the magnetron
filament terminalsto the chassisground 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 ishigh voltage present with high current capabilities inthe
circuits of the primaryand secondarywindings, choke coil and heat
sink of the inverter. Itisextremelydangerous to work on or near
these circuits with the oven energized. DO NOTmeasure the
voltage inthe high voltage circuitincluding the filament voltage of
the magnetron.
WARNING
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Never touch anycircuitwiring with your hand or with an insulated
tool during operation.
2.3. Part replacement.
Whenanypart orcomponent is tobe replaced, always ensure that the powercordis removed
fromthe wall outlet.
2.4. When the 10Afuse isblowndue to the operation of the short
switch:
WARNING
When the 10A250V fuse isblowndue to the operation of the
interlock monitor switch, replace all of the components (primary
latch switch, door switch, short switch and power relayB(RY1)).
1. Thisismandatory. Refer to “adjustments and measurements” for
the location of these switches.
2. When replacing the fuse, confirm that ithas the appropriate rating
for these models.
3. When replacing faultyswitches, be sure the mounting tabs are
not bent, broken or deficient intheirabilityto holdthe switches.
2.5. Avoidinserting nails, wire etc. through anyholes inthe unit
during operation.
Neverinsert a wire, nail oranyothermetal object through the lampholes on the cavityorany
holes orgaps, because suchobjects maywork as anantenna and cause microwave leakage.
2.6. Confirm after repair
1. After repairor replacement of parts, make sure that the screwsof
the oven, etc. are neither loose nor missing. Microwaves might
leak ifscrewsare not properlytightened.
2. Make sure that all electrical connections are tight before inserting
the plug into the wall outlet.
3. Check for microwave energyleakage. (Refer to procedure for
measuring microwave energyleakage).
CAUTION MICROWAVE RADIATION
USE CAUTIONNOTTO BECOME EXPOSEDTO RADIATIONFROM
THEMICROWAVE MAGNETRONOROTHERPARTS CONDUCTING
MICROWAVE ENERGY
IMPORTANTNOTICE
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The following components have potentialsabove 2000V whilethe
appliance isoperated.
-Magnetron
-High voltage transformer (Located on inverter (U))
-High voltage diodes (Located on inverter (U))
-High voltage capacitors (Located on inverter (U))
Payspecial attention to these areas.
When the appliance isoperated with the door hinges or magnetron
installed incorrectly, the microwave leakage can exceed more than
5mW/cm2. After repairor exchange, itisveryimportant to check if
the magnetron and the door hinges are correctlyinstalled.
2.7. Sharp edges
Caution
Please use caution when unpacking, installing or moving the unit,
as some exposed edges maybe sharp to the touch and cause
injuryifnot handled with care.
3. MEASUREMENTS AND ADJUSTMENTS
3.1. Adjustment of primarylatch switch, secondarylatch switch and
short switch.
1. Mount the Primarylatch switch, the secondarylatch switch and
the short switch to the door hook assemblyas showninILL.
NOTE:
Nospecificindividual adjustments during installation of the
Primarylatch switch, Secondarylatch switch or Short switch to
the door hook are required.
2. When mounting the door hook assemblyto the oven assembly,
adjust the door hook assemblybymoving itinthe direction of the
arrowsinthe illustration, so that the oven door will not have any
playinit. Check for playinthe door bypulling the door assembly.
Make sure that the latch keysmove smoothlyafter adjustment is
completed. Completelytighten the screwsholding the door hook
assemblyto the oven assembly.
3. Reconnect the short switch and check the continuityof the
monitor circuitand all latch switches againbyfollowing the
component test procedures.
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3.2. Measurement of microwave output
The output powerof the magnetron canbe determinedbyperforming IEC standardtest
procedures. However,due tothe complexityof IEC test procedures, it is recommendedtotest
the magnetron using the simple method outlinedbelow.
NecessaryEquipment:
*1 literbeaker*Glass thermometer/ *Wrist watchorstopwatch
NOTE:
Check the line voltage under load.Low voltage will lower the
magnetron output. Take the temperature readings and heating time
as accuratelyas possible.
1. Fill the beaker with exactlyone liter of tap water.Stirthe water
using the thermometer and record the water’stemperature.
(recorded as T1).
2. Place the beaker on the center of glass tray. / Set the oven for
High power and heat itfor exactlyone minute.
3. Stirthe water againand read the temperature of the water.
(recorded as T2).
4. The normal temperature rise at High power level for each model,
isas shownintable.
TABLE (1L-1min.test)
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RATED OUTPUT TEMPERATURE RISE
1100W Min. 9.4°C
4. EXPLODED VIEW AND PARTS LIST
4.1. EXPLODEDVIEW
4.2. PARTS LIST
NOTE:
1. When ordering replacement part(s), please use part number(s)
showninthispart list.
Donot use description of the part.
2. Important safetynotice:
Components identified bymark have special characteristics
important for safety.
When replacing anyof these components, use onlymanufacture’s
specified parts.
NOTE:
“A”parts are supplied byCSD(Japan)
“F” parts are supplied byPHAMOS(China)
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Ref. No. PartNo. PartName& Description Pcs/Set Remarks
1F00066V00HP CAUTION LABEL 1
3F03534W00QP LEAD WIREHARNESS 1
4F10014W00AP BASE 1
5F10084T00AP RUBBER FOOT 4
6F110D4W00BQP CABINETBODY(U) 1 T794AF,T704QF,S784BF,S754BF
6 F110D6V00SQP CABINETBODY(U) 1 T784SF
6F110D6V10SQP CABINETBODY(U) 1 T774SF
6F110D4W00HQP CABINETBODY(U) 1 S784WF,S754WF
7F200A5X20AP OVEN (U) 1 EXCEPTS754BF/WF
7F200A5X30AP OVEN (U) 1 S754BF/WF
8F20555K00AP COVER 1
9F21315Y00AP PULLYSHAFT 1
10 F2177-F80 WASHER 1
11 F290D9330AP ROLLER RING (U) 1
12 F3020-1200 DOOR HOOK 1
14 F3136-1200 HOOK LEVER A 1
15 F31374650AP HOOK LEVER B 1
16 F31384650AP HOOK LEVER C 1
17 F400A6V00QP FAN MOTOR 1 AC240V,SINGLEPHASE,50Hz
18 F40084T00AP FAN BLADE 1
19 F40254W00AP AIR GUIDEA 1
20 F40264W00AP AIR GUIDEB 1
21 F41444W00AP ORIFICE 1
22 F64508660AP SENSOR COVER B 1 EXCEPTS754BF/WF
24 F65434W00AP SENSOR COVER C 1 EXCEPTS754BF/WF
25 A607S4M00AP STEAMSENSOR 1 EXCEPTS754BF/WF
26 F612E4Y00XN INCANDESCENTLAMP(U) 1 24V,50Hz,20W
27 J61424T00AP MICRO SWITCH 1 (PRIMARYLATCH SWITCH)(V-15G-3C25)
28 J61414T00AP MICRO SWITCH 1 (SECONDARYLATCH SWITCH)(D3V-16G-3C25)
31 J61784T00AP MICRO SWITCH 1 (SHORTSWITCH)(D3V-1G-2C25)
32 F606Y4V00XN H.V.INVERTER (U) 1
33 F65854W00AP INVERTER BRACKETA 1
34 2M261-M32J MAGNETRON 1
35 A62304210BP FUSE 1 10A/240V,50Hz
37 F63265U30XN TURNTABLEMOTOR 1
38 F900C4W00QP AC CORD W/PLUG 1
39 F66624W00AP GROUNDING PLATE 1
40 XTWFA4+12T SCREW 4 FOR MAGNETRON
41 F90804W00AP CANOECLIP 1 FOR COVER
42 XTWFA4+12D SCREW 5 FOR CABINETBODY
43 XTTFA4+6BFZ SCREW 2 FOR CABINETBODYSIDE(T794AF,T704QF)
43 XTTFA4+6BN SCREW 2 FOR CABINETBODYSIDE(T784SF,T774SF)
43 XTTFA4+8BFZ SCREW 2 FOR CABINETBODYSIDE(S784BF,S754BF)
43 XTTFA4+8BCR SCREW 2 FOR CABINETBODYSIDE(S784WF,S754WF)
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Ref. No. PartNo. PartName& Description Pcs/Set Remarks
44 J692Y4T00QPR NOISE FILTER 1
45 F02445Y00AP CAUTION LABEL 1 T784SF
4.3. DOORASSEMBLY
Ref. No. PartNo. PartName& Description Pcs/Set Remarks
D1 F3018-1200 DOOR KEY A 1
D2 F302A5X10AAP DOOR A(U) 1 T794AF QPQ
D2 F302A5X00SAP DOOR A(U) 1 T784SF QPQ,T774SF QPQ
D2 F302A5X10QAP DOOR A(U) 1 T704QF QPQ
D2 F30016V20BQP DOOR A 1 S784BF,S754BF
D2 F30016V20HQP DOOR A 1 S784WF,S754WF
D3 F302K4W00AP DOOR E(U) 1
D4 F30215G10XN DOOR KEY SPRING 1
D5 F30854W00AP DOOR C 1
D6 F31456V00XP DOOR SCREEN A 1
D7 F31465X00SAP DOOR SCREEN B 1 T794AF,T784SF,T704QF
D7 F31465X70BAP DOOR SCREEN B 1 T774SF
D7 F31466J00BAP DOOR SCREEN B 1 S784BF/WF,S754BF/WF
D8 F01726V00JP CAUTION LABEL B 1
4.4. WIRING MATERIALS
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Ref. No. PartNo. PartName& Description Pcs/Set Remarks
W1 F030A5T50QP LEAD WIREHARNESS 1
W2 F030E6V00QP H.V.LEAD WIRE 1
4.5. ESCUTCHEONBASE ASSEMBLY
4.5.1. NN-T7*4
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Ref. No. PartNo. PartName& Description Pcs/Set Remarks
E10 F608E6V00QP D.P.CIRCUIT(ABU) 1 T794AF, T784SF, T704QF
E10 F603L6V10QP D.P.CIRCUIT(AU) 1 T774SF
E11 F800L4W70BAP CONTROL PANEL (AU) 1 T774SF
E12 F630Y6V10BQP MEMBRANESWITCH (U) 1 T774SF
E13 F82565X00AP DOOR OPENING LEVEL 1 T794AF, T784SF, T704QF
E13 F82564W00AP DOOR OPENING LEVEL 1 T774SF
E14 F81274W70AP BACK PANEL 1 T774SF
E15 F00076V00AQP NAMEPLATE 1 T794AF
E15 F00076V00SQP NAMEPLATE 1 T784SF
E15 F00076V00QQP NAMEPLATE 1 T704QF
E15 F00076V10SQP NAMEPLATE 1 T774SF
E16 F66164W20AP FLATCABLE 1 T794AF, T784SF, T704QF
E17 F603Y6V00QP D.P.CIRCUIT(DU) 1 T794AF, T784SF, T704QF
E18 F83376V00SQP MEMBRANESHEET 1 T794AF, T784SF, T704QF
E19 F800L5X00AAP CONTROL PANEL (AU) 1 T794AF
E19 F800L5X00BAP CONTROL PANEL (AU) 1 T784SF
E19 F800L5X00QAP CONTROL PANEL (AU) 1 T704QF
E20 F82985X00AP BUTTON 1 T794AF, T784SF, T704QF
E21 F90095X00AP GROUNDING PANEL 1 T794AF, T784SF, T704QF
E22 F80724W70AAP DOOR OPENING BUTTON (U) 1 T794AF
E22 F80724W70SAP DOOR OPENING BUTTON (U) 1 T784SF, T774SF
E22 F80724W70QAP DOOR OPENING BUTTON (U) 1 T704QF
E23 F80375K00AP COOK BUTTON SPRING 1
4.5.2. NN-S7*4
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Ref. No. PartNo. PartName& Description Pcs/Set Remarks
E1 F603L6V20QP D.P.CIRCUIT(AU) 1 S784BF/WF
E1 F603L6V30QP D.P.CIRCUIT(AU) 1 S754BF/WF
E3 F630Y6V20BQP MEMBRANESWITCH (U) 1 S784BF
E3 F630Y6V20HQP MEMBRANESWITCH (U) 1 S784WF
E3 F630Y6V30BQP MEMBRANESWITCH (U) 1 S754BF
E3 F630Y6V30HQP MEMBRANESWITCH (U) 1 S754WF
E4 F80346J00BAP ESCUTCHEON BASE 1 S784BF, S754BF
E4 F80346J00HAP ESCUTCHEON BASE 1 S784WF, S754WF
E5 F80726J00BAP DOOR OPENING BUTTON 1 S784BF, S754BF
E5 F80726J00HAP DOOR OPENING BUTTON 1 S784WF, S754WF
E6 F80375K00AP COOK BUTTON SPRING 1
E7 F82564W00AP DOOR OPENING LEVEL 1
E8 F00076V20BQP NAMEPLATE 1 S784BF QPQ
E8 F00076V20HQP NAMEPLATE 1 S784WF QPQ
E8 F00076V30BQP NAMEPLATE 1 S754BF QPQ
E8 F00076V30HQP NAMEPLATE 1 S754WF QPQ
4.6. PACKING AND ACCESSORIES
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Ref. No. PartNo. PartName& Description Pcs/Set Remarks
P1 F00036V20QP INSTRUCTION MANUAL 1
P2 F01026V00AQP PACKING CASE,PAPER 1 T794AF QPQ
P2 F01026V00SQP PACKING CASE,PAPER 1 T784SF QPQ
P2 F01026V00QQP PACKING CASE,PAPER 1 T704QF QPQ
P2 F01026V10SQP PACKING CASE,PAPER 1 T774SF QPQ
P2 F01026V20BQP PACKING CASE,PAPER 1 S784BF QPQ
P2 F01026V20HQP PACKING CASE,PAPER 1 S784WF QPQ
P2 F01026V30BQP PACKING CASE,PAPER 1 S754BF QPQ
P2 F01026V30HQP PACKING CASE,PAPER 1 S754WF QPQ
P3 F01044W00AP UPPER FILLER 1
P4 F01054W00AP LOWER FILLER 1
P5 F01064W00AP P.E.BAG 1
P6 F01074W00AP DOOR SHEET 1
P7 B06014W00AP COOKING TRAY 1
P8 F01084W00AP TRAYPACKING 1
P9 F00065G40AP CAUTION LABEL 1
P10 F01924T00AP SHEET 1 EXCEPTS784WF, S754WF
4.7. H.V. INVERTERBOARD MAINPARTS LIST (F606Y4V00XN)
Ref. No. PartNo. PartName& Description Pcs/Set Remarks
Q701
A691E4V10GP TRANSISTOR SI 1
Q702 TRANSISTOR SI 1
DB701 AESTRS2006M DIODESI 1 20A,600V
D701,D702 A62024V00GP DIODESI 2 0.3A
C704,C705 ECWH30822JUA CAPACITOR 2 8200PF 3000VDC
T701 F609A4V00XN H.V. TRANSFORMER 1
F607D4V00XN D.P.CIRCUIT(KU) 1
L701 F50204V00XN CHOKECOIL 1
CT701 F66904V00XN CURRENTTRANSFORMER 1
5. DIGITAL PROGRAMMER CIRCUIT
5.1. NN-T794AF/T784SF/T704QFQPQ
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