Simple Way Of H.v. Inverter/Magnetron Troubleshooting; H.v.inverter Board Main Parts List (F606Y8X00Ap) - Panasonic NN-SD291S Service Manual

NN-SD291S / NN-SD291W
7.2.

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:
Shut off in 23 seconds 1. Between 0.5A and 1.0A.
after "Start".
2. Between 1.0A and 2.0A.
Shut off in 3 seconds 1. Less than 0.5A
after "Start"
7.3.

H.V.INVERTER BOARD MAIN PARTS LIST (F606Y8X00AP)

Ref. No. Part No.
DB701 B0FBBQ000007
L701 F5020W100AP
Q701 B1JAGV000015
T701 A609A8X00AP
C701 F0C2H284A012
C702 F0C2E455A246
Ammeter reading is:
Check and repair open magnetron circuit Open magnetron wiring between Inverter
Check continuity of D702 in Inverter PCB.
1. D702 shorted
2. D702 is OK
Check open circuit: Interlock Switch,
DPC, Power Relay and CN701
Part Name & Description
BRIDGE DIODE
CHOKE COIL
TRANSISTOR SI
H.V. TRANSFORMER
CAPACITOR
CAPACITOR
To do:
Pcs/Set
1 20A,600V
1
1 1000V
1
1 0.28µF/500VDC
1 4.5µF/250VDC
16
Remedy:
and magnetron terminal.
Replace H.V.Inverter(F606Y8X00AP)
Replace magnetron
Replace defective component(s),
correct switch, cables and connectors.
Remarks
or