Panasonic NN-G335MF User manual

ORDERNO.PHAMOS0506022A3
Microwave Oven
NN-G315WF / NN-G335WF / NN-G335MF / NN-G335BF /
HPE(Hong Kong)
LPK(Philippines)
YTE(Others)
KTE(UAE)
PTE( Iran)
ZPE(CISCountries)
Please fileand use thismanual together with the service manual for
Model NN-S215/S235 (Order No.PHAMOS0506021C3).
SPECIFICATIONS
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2005 PanasonicHome Appliances Microwave Oven (Shanghai)
Co., Ltd. / All rights reserved. Unauthorized copying and
distribution isaviolation of law.
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1. SCHEMATIC DIAGRAM
1.1. NN-G315
1.2. NN-G335
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2. CAUTIONS TO BE OBSERVED WHEN
TROUBLESHOOTING
Unlike manyotherappliances, the microwave ovenis high-voltage, high-current equipment.
Though it is free fromdangerinordinaryuse, extreme care shouldbe takenduring repair.
CAUTION
Servicemenshouldremove theirwatches
wheneverworking close toorreplacing the
magnetron.
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2.1. Check the grounding
Donot operate on a 2-wire extension cord. The microwave ovenis designedtobe grounded
whenused. It is imperative, therefore, tomake sure it is groundedproperlybefore beginning
repairwork.
2.2. Warning about the electriccharge inthe high voltage capacitor
Forabout 30 seconds afterthe ovenis turnedoff, anelectric charge remains inthe high voltage
capacitor.Whenreplacing orchecking parts, remove the powerplug fromthe outlet and short
the terminal of the high voltage capacitor(terminal of leadwire fromdiode) tochassis ground
withaninsulatedhandle screwdrivertodischarge.
WARNING
There is high-voltage present, withhigh-current
capabilities inthe circuits of the high voltage
winding and filament winding of the high voltage
transformer. It is extremelydangerous towork on
ornearthese circuits withovenenergized. / DO
NOTmeasure the voltage inthe high voltage
circuit including filament voltage of magnetron.
WARNING
Nevertouchanycircuit wiring withyourhand nor
withaninsulatedtool during operation.
2.3. When parts must be replaced, remove the power plug from the
outlet.
2.4. When the 8Amp fuse isblowndue to the operation of short
switch:
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WARNING
Whenthe 8 Ampfuse is blowndue tooperation of
the interlock monitorswitch, you must replace all
of the components (Primarylatchswitch, Door
switch, Short switchand PowerrelayB (RY1)).
1. Thisismandatory. Refer to “Adjustments and Measurement” for
these switches.
2. When replacing the fuse, confirm that ithas the appropriate rating
for these models.
3. When replacing faultyswitches, be sure mounting tabs are not
bent, broken or otherwise 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
otherholes 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 evergyleakage.)
CAUTION / MICROWAVE RADIATION
USE CAUTION NOTTO BECOME EXPOSED TO
RADIATION FROM THE MICROWAVE
MAGNETRON OR OTHER PARTS CONDUCTING
MICROWAVE ENERGY.
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IMPORTANTNOTICE
1.The following components have potentials above
2000V while the appliance is operated.
*Magnetron
*High voltage transformer
*High voltage diode
*High voltage capacitor
Payspecial attention tothese areas.
2.Whenthe appliance is operatedwiththe door
hinge ormagnetron adjustedincorrectly, the
microwave leakage canexceedmore than5mW/cm
2. Afterrepairorexchange, it is veryimportant to
check that magnetron and the doorhinge is
correctlyinstalled.
3. MEASUREMENTS AND ADJUSTMENTS
3.1. Adjustment of Primarylatch switch, Secondarylatch switch and
Short switch.
1. Mount the Primarylatch swith, 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 coninuityof 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:
-1liter 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 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.
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TABLE (1L-1min.test)
RATED OUTPUT TEMPERATURE RISE
800W Min.12.6°F(7.0°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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