Panasonic NN­GS595A - 7.5 Simple H.V. Inverter;Magnetron Troubleshooting; 7.6 Semiconductor Checking with OHM Meter

10/24/2016 XMLServiceManual
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7.5SimplewayofH.V.Inverter/magnetron
troubleshooting
Purpose:
Simpleway(3/23secondsrule)ofidentifyingwhetherit’sMagnetron,Inverterorothers.
Setup:
TheunitunderquestionisconnectedthroughtheAmmeterasshownbelow.
Procedure:
Followthematrixtablebelowtoidentifytheproblemsource.
Note:
DonotreplacebothInverterboardandMagnetronsimultaneouslyandautomaticallywithoutgoingthroughthisprocedure.
Powerwill:
Ammeter
readingis:
Todo: Remedy:
Powerwill:
Ammeter
readingis:
Todo: Remedy:
Shut off in 23
secondsafter“Start”.
1.Between 0.5A
and1.0A.
Checkandrepairopenmagnetroncircuit
Open magnetron wiring between Inverter and
magnetronterminal.
2.Between 1.0A
and2.0A.
CheckcontinuityofD702inInverterPCB.
1.D702shorted
ReplaceH.V.Inverter
(F606YM300GP)
2.D702isOK Replacemagnetron
Shutoffin3seconds
after“Start”
1. Less than
0.5A
Check open circuit: Latch Switch, DPC,
PowerRelayandCN701
Replace defective component(s), or correct
switch,cablesandconnectors.
7.6HowtocheckthesemiconductorsusinganOHM
meter