Panasonic NN-DF383BZPE Service Manual ▷ View online
7.4. Trouble related to Digital Programmer Circuit
SYMPTOM
STEP
CHECK
RESULT
CAUSE/CORRECTIONS
No display when oven is first plugged
in
in
1
Fuse pattern of D.P.C.
Normal
→Step2
Open
Replace D.P.C. or Fuse
Pattern
Pattern
2
IC10 pin4 voltage
Abnormal 0V
IC26
Normal=12V
→Step3
3
IC10 pin5 voltage
Abnormal
IC10
Normal=5V
IC1, CX320, Display
No key input
1
Touch switch continuity
Abnormal
Touch switch
Normal
IC1
No beep sound
1
IC1 pin 5 voltage
Abnormal
IC1
Normal=5V
BZ210, Q210
Power relay A(RY2) does not turn on
even though the program had been set
and the start pad is tapped
even though the program had been set
and the start pad is tapped
1
IC1 pin 78 voltage while operation
Abnormal
IC1
Normal=5V
RY2, Q222
No microwave oscillation at any power
1
IC1 pin 77 voltages while operation at high
power
power
Abnormal
IC1
Normal=5V
→Step2
2
Collector of Q223
Abnormal
Q223 and/or Q225, Q226,
Q227
Q227
Normal 0.7V
RY1
Dark or unclear display
1
Replace display and check operation
Normal
Display
Abnormal
IC1
Missing or lighting of unnecessary
segment
segment
1
Replace IC1 and check operation
Normal
IC1
Abnormal
Display
H95/H97/H98 appears in window and
oven stops operation.Program High
power for 1 minute and conduct
following test quickly, unless
H95/H97/H98 appears and oven stops
oven stops operation.Program High
power for 1 minute and conduct
following test quickly, unless
H95/H97/H98 appears and oven stops
1
Unplug CN702 (2 pin) connector and
measure voltage between terminals
measure voltage between terminals
Abnormal=0V
1. Latch Switch
2. D.P.C. /Power Relay
2. D.P.C. /Power Relay
Normal=220V
→Step2
2
Unplug CN701 (3 pin) connector and
measure pin1 voltage of D.P.C. CN3
measure pin1 voltage of D.P.C. CN3
Abnormal=0V
D.P.C.
Approx. AC 3V
Magnetron
29
NN-DF383B
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.
procedure.
Power will:
Ammeter reading is:
To do:
Remedy:
Shut off in 23 seconds
after “Start”.
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
(F606YBA00QP)
(F606YBA00QP)
2. D702 is OK
Replace magnetron
Shut off in 3 seconds
after “Start”
after “Start”
1. Less than 0.5A
Check open circuit: Latch Switch, DPC,
Power Relay and CN701
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
30
NN-DF383B
7.7. H.V. INVERTER MAIN PARTS LIST (F606YBA00QP)
Ref. No.
Part No.
Part Name & Description
Pcs/Set
Remarks
Q701
B1JAEV000003
IGBT
1
C701
ECWHC3B104JA
FILM CAPACITOR
1
0.1µF,1000VDC
C702
ECWF4305N851
FILM CAPACITOR
1
3µF,250VDC
DB701
B0FBBQ000006
RECTIFIER BRIDGE
1
L701
F5020W100AP
CHOKE COIL
1
R702
D0CM562JA002
SAND BAR RESISTOR
1
T701
F609ABA00GP
TRANSFORMER
1
(INCLUDING D701,D702,C706,C707)
D701,D702
B0FBAZ000003
DIODE
2
C706
F0C3F562A002
FILM CAPACITOR
1
5600PF/3KV
C707
F0C3F822A002
FILM CAPACITOR
1
8200PF/3KV
31
NN-DF383B
8 EXPLODED VIEW AND PARTS LIST
8.1. EXPLODED VIEW
32
NN-DF383B
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