Panasonic NN-A883WB User manual

MOP0307006C2

MicrowaveOven

NN-A813AB/ NN-A873SB/ NN-A883WB

32 Litre

EPG Europe

SPECIFICATIONS

Unauthorizedcopying and distribution isaviolation oflaw.

1. Inverter Warning

The inverterboardlooks like a regularPCB, however, this PCB drives the magnetron tube using

veryhigh voltages and current.

Ithas

1. Veryhigh voltageand high current

2. AnAluminium heat sinkthat becomes veryhot

3. Thecapacitorson theinvertercircuitwill containahigh voltage

chargeevenwhentheovenisnotoperating.

Donot

1. Donottouchthecircuitryas itcontainsveryhigh voltages. When

replacing theboard please take extremecaretoavoidpossible

electricshock. High voltages mayremaininthecircuit.

2. Donottouchthealuminium heat sinkas itwill becomeveryhot. It

alsocontainshigh voltages.

3. DonotattempttorepairtheinverterPCB as thiscanbevery

dangerous. Replace thehigh voltageinvertercircuitas a

complete unit. Return theoldunitfullyrepackedintheoriginal

shipping boxand completedpaperwork.

4. Donotadjust or tamperwiththepreset volumeon theinverter

board. Itisverydangeroustoadjust thispreset withoutproper

test equipment.

5. Donottest theovenwhiletheinvertergrounding stripor screws

areloose. Itisverydangeroustooperate theinvertercircuitboard

withoutaproperground connection.

Figure 1

InverterGounding

Figure 2

InverterPCB layout

2. Feature Chart

Function A813ABEPG

Microwave 6

Grill 3

Convection 17

Combination YES

Sensorreheat 2

Sensorcook 2

Sensorcombination 4

Weight defrost 3

Weight combination 8

Weight reheat -

Weight cook -

Stage cooking 3

Delay/Stand YES

More/Less YES

Kg->lb/oz YES

Clock 12H

Wordprompt English

StepbyStep LED

3. Control Panel

4. Operation And Digital Programmer CircuitTest

Procdure

5. SchematicDiagram

6. Wiring Diagram

7. Description ofOperation

7.1. Variablecooking powercontrol

The HIGH VOLTAGEINVERTER POWER SUPPLYcontrols the output powerbya signal from

the Digital ProgrammerCircuit(DPC). The PowerRelay(RY1)turns on to supplypowerto the

invertercircuit. The level of output poweris controlledbythe drive signal level from the inverter

circuitas indicatedinthe table below.

/ NOTE1:The ON/OFF time ratiodoes not correspond with the percentage of microwave power

since approximately2 seconds are requiredforheating the magnetron filament.

NOTE2:Ifmicrowave cooking is over8 minutes on HIGH power, the fanmotorrotates for1

minute aftercooking to cool the ovenand its electrical components. /

DutyCycles forMicrowave Cooking

OUTPUT

(watts) DUTYON/OFF

(seconds)

ON time OFF time

HIGH 1000 22 0

DEFROST 270 16 6

MEDIUM 600 22 0

LOW 440 22 0

SIMMER 250 15 7

WARM 100 8 14

7.2. Grill Cooking

The Digital ProgrammerCircuitcontrols the grill powerbyoperating the powerrelayRY4 inthe

sequence displayedinthe table below:

DutyCycles forGrill Cooking

DUTYON/OFF (seconds)

ON time OFF time

Grill 1 66 0

Grill 2 54 12

Grill 3 42 24

7.3. AutoWeightDefrost and AutoWeightCook

Whenanauto control feature is selectedand the startpadpressed:

1. TheDigital ProgrammerCircuitdetermines thepowerlevel and

thecooking timeand indicates theoperating state inthedisplay.

Thetablebelowshowsthecorresponding cooking times for each

categoryand its respectiveweight.

2. Whenthecooking timeinthedisplaywindowhas elapsed, the

oventurnsoff automaticallyviathecontrol signal from theDigital

ProgrammerCircuit.

Note: Afterauto cooking, ifthe oventemperature is overthe predeterminedtemperature then

the fanmotorwill thenrotate to cool the ovenand its components.

Auto Weight Defrost

CATEGORY 1stTOUCH

WEIGHT

(grams)

COOKINGTIME

Bread& Rolls 100 4m18s

MeatItems 200 3m40s

MeatJoints 400 6m20s

Auto Weight Cook

CATEGORY 1stTOUCH

WEIGHT

(Grams)

COOKINGTIME

ChilledPizza 400 08m20s

FrozenPizza 400 08m40s

ChilledQuiche 400 12m40s

FrozenQuiche 400 12m40s

ChickenPieces 500 14m40s

ChickenWhole 1300 23m55s

Pork / Veal 1200 35m00s

Beef 900 26m00s

Lamb 1200 30m05s

Tarte 6 -8 (pieces) 29m00s

7.4. Convection Cooking

1. TheDigital ProgrammerCircuitoperates thepowerrelaysRY3,

RY5and RY6inthesequence illustratedbelow.

2. Whentheovenreaches apredeterminedtemperaturethedigital

programmercircuitstopssupplying powertotherelayRY5,

resulting intheconvection heaterturning off.

3. Whenthetemperaturedropsbelowthepredetermined

temperature, thedigital programmercircuitsupplies powertothe

relayRY5resulting intheconvection heaterturning on.

Note:Aftertheconvection process, iftheoventemperatureis

higherthanthepredeterminedtemperature, thefanmotor rotates

tocool theelectroniccomponents and thoven.

This manual suits for next models

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