Troubleshooting; H.v.inverter Board Main Parts List - Panasonic NN-SN776S Service Manual

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

5. H.V.INVERTER BOARD MAIN PARTS LIST

(F606Y6G00CP)
To do:
Check and repair open
magnetron circuit
Check continuity of D702 in
Inverter PCB.
1. D702 shorted
2. D702 is OK
Check open circuit: Latch
Switch, DPC, Power Relay and
CN701
12
Remedy:
Open magnetron wiring
between Inverter and
magnetron terminal.
Replace H.V.Inverter
(F606Y6G00CP)
Replace magnetron
Replace defective
component(s), or correct
switch, cables and
connectors.