tech-sheet-8169390
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u*!l Electrical Shock Hazard Disconnect power before servicing. Replace all panels before operating. Failure to do so could result in death or electrical shock.

PRECAUTIONS TO BE OBSERVED BEFORE

AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY.

a. Do not operate or allow the oven to be oper- magnetron, waveguide or transmission ated with the door open. line and cavity for proper alignment, in-

b. Make the following safety checks on all ov- tegrityand ens to be serviced before activating the magnetronor other mimwave source, and d. Any defective or misadjusted compo- make repairs as necessary: nents inthe interbck,monitor, door Seal, and microwave generation, and trans 1. Interlock Operation mission systems shall be repaired, re- placed, or adjusted by procedures 2. Proper Door Closing described in service manual before the oven is released to the owner. 3. Seal and Sealing Sulfaces (Arcing, Wear & Other Damage) e. A microwave leakage check to verify withthe ~~~~p~elrfom 4. Damage to or Loosening of Hinges & Latches ance standard should be performed on each oven prior to release to the owner. 5. Evidence of Dropping or Abuse f. Do not attempt to operate the oven if the c. Before turning on microwave power for any window area of the dooris broken. service test or inspedon within the micro- wave generating compartments, checkthe

MICROWAVE OVEN POWER compensate for either arcurnstance. Replace the magnetrononly l t h ewatertemperaturerise OUTPUT MEASUREMENT indicatesapoweroutputwellbeyondthe normal result. The power output of the magnetron can be measured by the folbwingtest: (for accuratere- FAILURE CODESnNDlCATlONS

sults, the line voltage must be 120 VAC andthe – POWER FAILURE After a power failure, the

oven cavitymust be dean). Welcome Saeen will be displayed.

1. Fill a glass measuring cup with 16 oz. -F2- KeyboardFailure(See page 6) (453cc) of tap water. Stir the thermometer -F3H- Humidity SensorFailure(See page 9) throughthe water untilthe temperaturesta- – F 6 Mcrowave Relay Failure

bilizes -F7- EEPROM Failure

2. Place the cup of water in the center of the

oven. Operate on HIGH for 60 seconds.

3. Stir the thermometer through the water and record the maximum temperature.

4. Subtract the cold water temperature from

– – the hot water temperature. The normal re-

sult should be a 20 38′ F (11.I 21.1′ C)

rise in temperature.

NOTE: Lessthana20′ F(11 .lo C)temperature rise may indicate an operating voltage of less

than 110 volts or a b w power output from the

magnetron. Cooking time can be adjusted to

FOR SERVICE TECHNICIANS USE ONLY PART NO. 461965197571R169390

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SCHEMATIC DlAGRAM

PART NO. 461965197571181693SO FOR SERVICE TECHNICIAN3 USE ONLY

PAGE 4 – TECH SHEET DO NOT DISCARD PICTORIAL DlAGRAM

– HlW HighTerrgeratureWire (differentiatedby a

fibre glass outer braid)

PART NO. 46196519757118169390 FOR SERVICE TECHNICIAN’S USE ONLY

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PARTS LAYOUT

Not to 8c81e

Turnlable

H.V.Tronsformer

~xho;st ran Line Fuse Thrrrnos~ol

PRIMARY, MONITOR, AND SECONDARY SWITCH CHECKOUTPROCEDURE

2. Check from the common terminal (White wire) to the NOTE: These diagramsare not intendedto show a complete citwii,they representthe positionof switchesduring’DOOR OPENED’ and ‘DOOR CLOSED’ (continuity checksow).

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. 4 6 1 % 5 1 9 7 5 7 1 ~ i S 9 3 9 0

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Exampleof use: When Cook Timeisselected, a resistanceof lessthan200 ohmswillbe observed between 4 and 10 on the flex circuit connector. See diagram bebw.

TOUCH PANEL M D UICROCOYPVlER BOACID TEST

The microwave hood combination is provided 2. Release the CANCEL button and then dose

with a setfdiagnostic routine that can be ac- thedoor.

cessedthroughthetouchkey pad.To initiatethis 3. When a key is pSSed a number amrding

routine: to KEY TABLE d i i a v e d . When no kev is

1. Open the door. Unplug the miaowave oven isd&6ed.

for at least2 seconds. Depressthe CANCEL Note :Donot pressanyotherkey than while the door isown. button and plug the microwave oven back while still depressingthe cancelbutton.

KEY TABI.E FOR TEST YO#

The buzzerisactivatedwhentherotaryencoder is turned dockwise. and deactivatedwhen en-

coder isturnedcounterdockwise.

Humiditysensortest (Hum XXX)

Eight seconds after reset, the humidity sensor anditsinterface are tested.

Before the test isready ‘2is displayed. If the tests are successful. ‘ O K will be dis~lavedI.f one or more tests k i k d , ‘ERR’ wiil b;? d k played.

Trimming of lamp voltage, display conbast and nitel i e (CaI XXX) ‘ O K is dkplayed when all calibration paame- 1 tenare set Ifoneormore wametenaremks ing. ‘ERR’ willbe d i i G d .

Bunw test (Key XX) PART NO. 4619051975711816B390 FOR SERVICE TECHNICIAN% USE ONLY

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TROUBLESHOUIlNGGUIDE

Completethefolloiving steps beforechecking4. AU testing must be done with an ohmmeter

microwave ci1cu-W havinga sensitivity of 20,000ohmspervoltor

1. Chedc the line voltage, household fuses or greater, and poweredby at least a %voltbat- circuit breakers te ry.

2. Check for loosewiringor m i d r i n gwithinmi- 5. All operationalcheckswith miaowaveenergy crowave. done with a (160r. arp water in a glass measuring cup) in the m.kxowave

3. Disconned w h i i wire horn power bans- oven.

fotmerandd i i r g e high-voltagecapacitor. – MICROWAVE

COOKIN6

BWWWM …..-.-…………. TURNS ON AUTO~TlCALlY 0 F l r I— 1J-C FVI 1Dlnp. .

WCROWAVE Fu

tLU66EDIN-TlWE

OF MY

DIStUYED

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. 461B651B75711816B3BO

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— – . * him #J

COMPONENT TESTS

Discharge the highvoltage capacitorandre- Conduct a microwave energy test after per-

move the leadwires fromthe primary wind- forming any tests or repairs to the micro-

ing of the high voltage transformer before wave.

conducting any of the following tests Check that all w i n kads a n i n the correct

Conductall operationtestswith (1)16 o ~ c u p position before operating the microwave

of water in the oven. oven.

Grasp wire connectors when removing the

– wire kadsfrommicrowaveparts.

COMPONENT TEST RESULTS

H.V. 1. Remcrre wire leads.

Transfomr

2. Measureresistance(ohmrne(er 3. Measurn rsJistonce (ohmneter gmb:TZx1000):

– Primarywindingto gcound’ng

@ – Filamentwindingtogrounding — scale: Rxl) – Less than 0.5 ohm (appmximate) Ptimary winding Secondarywindii – 100 ohms (approximale) – 0 ohms Filament winding — Normal: IFTmle Nomral: IMmite

Magnetron 1. Remcwewire leads.

@ 2. Messurn resistonce Chassis – (ohmmeter Sale:bl): Fitament lerminal- Nomral: Lessthan1ohm

3. Measure rsJistonce

– – (ohmmeter scale:TZx1000): Nwmal:lgmle Fbrnentlo chasb

,. CONTINUED

PART NO. 46196519757118169390 FOR SERVICE TECHNICIAN’S USE ONLY

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– Abnompl: Continuity. – Normal: 17-28 ohms (approx.) – Abnoml: lnfimleor sevenl.

Stirrer Motor – Abnormal: Infimiteor several. – Normal:33004200ohms (appmx.). (ohmmeler scale: Rxl000): – Abnormal: Infiniteorseveaal.

Abnomral: Infiniteor several.

FOR SERVICE TECHNICIAN’S USE ONLY PART NO. 461965lS7571/81693SO

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(ohmmeter scale: RxlOOb):

2. Meawre resistance(ohmmeter – Normal:Severalohms (appcoxim&e) (Inside casing) – Akwxmal:lnfmite

PART NO. 46196519757118169390 FOR SERVICE TECHNICIANS USE ONLY