Panasonic NN-S215WF User manual

ORDERNO.PHAMOS0506021C3
Microwave Oven
NN-S215WF / NN-S215MF / NN-S235WF / NN-S235MF / NN-
S235BF
QPQ(Australia&New Zealand)
HPE(Hong Kong)
YPQ(Singapore)
MPQ(Malaysia)
TPE(Thailand, Indonesia)
LPK(Philippines)
YTE(Others)
KTE(UAE)
PTE( Iran)
KPQ(Kuwait, Doha, Qatar, Oman, Bahrain, Pakistan)
STM(Saudi Arabia)
ZPE(CISCountries)
SPECIFICATIONS
1

2005 PanasonicHome Appliances Microwave Oven (Shanghai)
Co., Ltd. / All rights reserved. Unauthorized copying and
distribution isaviolation of law.
2

3

1. FEATURE CHART
MODEL NN-S215WF/MF NN-S235WF/
MF
FEATURE
Three Stage Cooking — O
Turbo Defrost — O
AutoCook — O
PowerLevel Select — O
Variable PowerControl — O
ChildSafetyLock O —
2. CONTROL PANEL
3. OPERATION AND DIGITAL PROGRAMMER
CIRCUIT TEST PROCEDURE
3.1. Time Cooking for TwoStage
4

OPERATION SCROLL DISPLAY
1. Plug the powersupply
cordintowall outlet.
2. Place a waterloadin
the oven.
3. Press [MicroPower]
Padonce toset high
power.
(1st stage)
4. Set for10 Seconds.
5. Press [MicroPower]
Pad5 times toset low
power.
(2nd stage)
6. Set for1 minute.
7. Press [Start] Pad.
7. When1st stage
cooking time has
elapsed. Ovenbeeps
twice and automatically
switches to2nd stage
cooking.
8. When2nd stage
cooking time has
elapsed, ovenbeeps 5
times and shuts off.
5

3.2. Turbo Defrost
OPERATION SCROLL DISPLAY
1. Press [Turbo
Defrost1.0 kg] Padto
set the weight for1.0kg.
2. Press [Start] pad.
3. Press [Stop/Reset]
Padtwice, Ovenshuts
off.
3.3. Auto Cook
OPERATION SCROLL DISPLAY
1. Press [Vegetables]
padthrice toset the
weight for300g.
2. Press [Start] pad.
3. Whencooking time
has elapsed, Oven
beeps 5 times and shuts
off.
3.4. Auto Reheat
6

OPERATION SCROLL DISPLAY
1. Press [AutoReheat]
padtwice for2 serving.
2. Press [Start] pad.
3. Whencooking time
has elapsed, Oven
beeps 5 times and shuts
off.
3.5. To Set ChildSatetyLock
OPERATION SCROLL DISPLAY
1. Press [Start] pad3
times continuously.
"Child" appears inthe
display.
3.6. To Reset ChildLock
OPERATION SCROLL DISPLAY
1. Press [Stop / Reset]
pad3 times
continuously.
Time of dayorcolon if
set appears inthe
display.
4. SCHEMATIC DIAGRAM
4.1. NN-S215 (QPQ, ZPE)
7

4.2. NN-S215 (EXCEPT QPQ &ZPE)
8

4.3. NN-S235
9

5. DESCRIPTION OF OPERATING SEQUENCE
5.1. Variablepower cooking control (NN-S235)
The coil of powerrelayB (RY1) is energizedintermittentlybythe digital programmercircuit,
whenthe ovenis set at anypowerselection except forHigh powerposition. The digital
programmercircuit controls the ON-OFF time of powerrelayB contacts inordertovarythe
output powerof the microwave ovenfrom”Low” to“High” power. One complete ON and OFF
cycle of powerrelayB is 22 seconds. The relation betweenindications on the control panel and
the output of the microwave ovenis as shownintable.
NOTE:
10

The ON/OFF time ratiodoes not correspond withthe percentage of microwave powersince
approximately2 seconds are requiredforheating of magnetron filament.
OUTPUT ON-OFF TIME OF
POWERSETTING POWER(
%) POWER RELAY B (RY1)
APPROX. ON(SEC) OFF(SEC)
HIGH 100% 22 0
MEDIUM-HIGH 70% 17 5
MEDIUM 50% 13 9
MEDIUM-LOW 30% 8 14
LOW 15% 5 17
DEFROST 30% 8 14
5.2. Variablepower cooking control (NN-S215)
The vari-powercontrollercontrols the ON-OFF time of the vari-powerswitchtovarythe output
powerof the microwave ovenfrom“Low” to“High”. The vari-powercontrolleris a part of the
timerassembly. The timerassemblyconsists of timermotor, timerswitch, vari-powerswitch
and the combination of gears, camand actuaterlevel.
One complete cycle of the vari-powercontrolleris 30 senconds, inwhichthe vari-powerswitch
is turned“ON” or“OFF” bythe camrotation inthe 30 ± 2 second period.
Bycontrolling the timing of the vari-powerswitch“ON” period, the 220 or240V AC suppliedto
the high voltage transformeris interruptedintermittentlysothat the average output powerof
the microwave ovenis varied.
Table shows the timing chart of vari-powerswitchoperation inresponse tothe powersetting on
the control panel.
NOTE:
The ON/OFF time ratiodoes not correspond withthe percentage of microwave powersince
approximately2 seconds are requiredforheating of magnetron filament.
Variable PowerCooking
OUTPUT ON-OFF TIME OF
POWER
SETTING POWER( %) POWER RELAY B (RY1)
APPROX. ON(SEC) OFF(SEC)
HIGH 100% 30 0
MEDIUM-HIGH 70% 23.2 6.8
MEDIUM 55% 16.5 13.5
MEDIUM-LOW 30% 9.8 20.2
LOW 15% 5 25
DEFROST 30% 9.8 20.2
5.3. Turbo Defrost, Auto Reheat, Auto Cook control (NN-S235)
Whenthose AutoControl feature is selectedand the Start Padis tapped:
11

1. The digital programmer circuitdetermines the power level and
cooking time to complete cooking and indicates the operating
state inthe displaywindow. / Tableshowsthe corresponding
cooking times for respective serving or weight bycategories.
2. When cooking time inthe displaywindow has elapsed, the oven
turns off automaticallybyacontrol signal from the digital
programmer circuit.
Turbo Defrost
WEIGHTSELECTED COOKING TIME
1.0KG 9 min.36 sec.
AutoReheat
WEIGHTSELECTED COOKING TIME
2 SERV 3 min.10 sec.
AutoCook
CATEGORY WEIGHT
SELECTED COOKING TIME
Vegetable 100g 1 min.50 sec.
6. 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.
6.1. 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.
6.2. 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.
12

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.
6.3. When parts must be replaced, remove the power plug from the
outlet.
6.4. When the 8Amp fuse isblowndue to the operation of short
switch:
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.
13

3. When replacing faultyswitches, be sure mounting tabs are not
bent, broken or otherwise deficient intheirabilityto holdthe
switches.
6.5. 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.
6.6. 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.
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.
7. DISASSEMBLY AND PARTS REPLACEMENT
14

PROCEDURE
7.1. Magnetron
1. Discharge the high voltage capacitor.
2. Remove 1screw holding airguide A&reinforce bracket.
3. Disconnect 2high voltage lead wires from magnetron filament
terminals.
4. Remove 4screwsholding the magnetron.
NOTE:
After replacement of the magnetron,tighten mounting screws
properlyinan Xpattern, making sure there isno gap between the
waveguide and the magnetron to prevent microwave leakage.
CAUTION
Whenreplacing the magnetron, be sure the
antenna gasket is inplace.
CAUTION
Whenconnecting 2 filament leadwires tothe
magnetron terminals, be sure toconnect the lead
wires inthe correct position. The leadwire of high
volatge transformershouldbe connectedto“F
terminal” and the leadwire fromhigh voltage
capacitorshouldbe connectedto“FA terminal”.
7.2. Digital Programmer Circuit(DPC)and membrane keyboard.
NOTE:
Besure to ground anystaticelectriccharge builtup on your body
before handling the DPC.
15

1. Release 1flat cablefrom D.P.Cboard holding on the oven cavity.
2. Remove 1screw holding escutcheon base and slide the
escutcheon base upward slightly.
3. Remove 1screwsholding D.P.Cboard.
4. Separate D.P.Cboard from tabs on the escutcheon base and
remove D.P.Cboard.
5. Remove rubber connector.
6. Separate displayfrom tabs on the escutcheon base and remove
display.
To replace membrane keyboard
7. Push the upper part of keyboard (displaywindow portion) from
back of escutcheon base, and peel off escutcheon sheet &
membrane keyboard completelyfrom escutcheon base.
NOTE:
1. The membrane keyboard isattached to the escutcheon base
with doublefaced adhesive tape. Therefore, applying hot airsuch
as using ahairdryer isrecommended for smoother removal. / 2.
When installing new membrane keyboard, make sure that the
surface of escutcheon base iscleaned sufficientlyso that any
problems (shorted contacts or uneven surface) can be avoided. / 3.
Alignment position of membrane keyboard isas follows; /
Membrane keyboard: Right and upper edges / Escutcheon sheet:
Right and upper edges
7.3. Low voltage transformer and/or power relays(RY1, RY2)
NOTE:
16

Besure to ground anystaticelectriccharge builtup on your body
before handling the DPC.
1. Disconnect all connectors from D.P.C..
2. Remove 2screwsholding D.P.C. board on the oven cavity.
3. Using solder wick or adesoldering tool and 30W soldering iron,
carefullyremove all solder from the terminal pins of the low
voltage transformer and/or power relays.
NOTE:
Donot use asoldering iron or desoldering tool of more than 30
watts on DPCcontacts.
4. With all the terminal pins cleaned and separated from DPC
contacts, remove the defective transformer/power relays. Replace
components, making sure all terminal pins are inserted
completely. Resolder all terminal contacts carefully.
7.4. Timer
1. Disconnect all lead wires from timer.
2. Remove 1screw holding escutcheon base and slide the
escutcheon base upward slightly.
3. Remove 3screwsto detach timer from escutcheon base.
4. Remove 2knobs from timer shaft.
17

7.5. Fan motor
1. Disconnect 2lead wires from fan motor terminals.
2. Remove 1screw holding diode (U)on side of the oven.
3. Disconnent 2H.V. lead wires which linking to H.V. transformer
from H.V. capacitor terminals.
4. Remove 3screwsholding orifice assyand detach the orifice assy
from oven assy.
5. Remove fan blade from the motor shaft bypulling itstraight out.
6. Remove 2screwsholding fan motor on orifice assyand detach
the fan motor from orifice assy.
7.6. Door assembly
1. Remove door Cfrom door Ebycarefullypulling outward starting
from upper right hand corner using aflat blade screwdriver.
2. Separate door Efrom tabs on door Aand remove door A.
3. Remove door screen Bfrom door A.
4. Remove handlespring which hitching door handle, seperate door
handlefrom door Abypulling outward door handleslightly,
moving ittowards the side of door Aand out.
18

5. Open Door Eat the opening angleof approximately10°(Note: The
door cannot be removed ifthe opening angleisgreater than 10°).
6. Remove the door Efrom its hinges bypushing the door E's
bottom upward and out.
7. Remove door keyand door keyspring from door E.
8. Replace other components.
NOTE:
Door alignment iscrucial. Ifdoor ismisaligned, applypressure until
alignment isachieved.
NOTE:
After replacement of the defective component parts of the door,
reassemble, and perform microwave leakage test.
7.7. Turntablemotor
1. Remove the motor cover bybreaking off at the 4spots indicated
byarrowswith acutter or the like.
NOTE:
After breaking off the motor cover, make sure that cut-off portions
are properlytrimmed off or bent to inside so that no sharp edges
will be exposed to the outside.
2. Disconnect 2lead wires connected to the turntablemotor.
19

3. Remove the turntablemotor byremoving 1screw.
NOTE:
After reinstalling the new turntablemotor and reconnecting the 2
lead wires, reinstall the motor cover byrotating itaround 180°,
tucking the 2tabs under the base into the 2provided slots, then
screw the singletab to the base using ascrew.
8. COMPONENT TEST PROCEDURE
CAUTION
1. High voltage is present at the high voltage
terminal of the high voltage transformerduring any
cook cycle.
2. It is neithernecessarynoradvisable toattempt
measurement of the high voltage.
3. Before touching anyovencomponents, or
wiring, always unplug the ovenfromits power
source and discharge the high voltage capacitor.
8.1. PrimaryLatch Switch, (Door Switch and Power RelayB)
Interlocks.
1. Unplug the lead connectors to Power RelayBand verify
continuityof the power relayB1-2 terminals.
20