Panasonic NN-8508 - Page 26

NN-8508, NN~8558
NN-8808, NN-8858
NN-8808P
{TROUBLE 2] Fuse is blown.
Replace fuse
Plug power cable into
wall receptacle and
open door
N
2 Is fuse blown? =
For U.S.A. For Canadian
models models
No continuity Check continuity of Continuity Check continuity of Check continuity of
short switch latch switch A and latch switch A
power relay B(RY B)
Continuity Continuity
Disconnect one side
of lead wire connected
between H.V.T. and
H.V.C. and operate
unit
Normal
Defective H.V.C.
Fuse blows
Defective H.V.T.
Shorted contacts of
short switch
Replace latch switch A
and short switch
(NOTE 1 and 2)
NOTE 1: All these switches must be replaced at same time.
(Refer to page 23 for adjustment instructions. )
NOTE 2: Check continuity of power relay B's contacts (between 1 and 2) and if it has continuity, replace power relay B too.
Shorted contacts of
latch switch A and
power relay B (RY B)
Shorted latch switch A
Replace latch switch A,
short switch and power
relay 8B (NOTE 1 and 2)
Replace latch switch A
and short switch
(NOTE 1)
{TROUBLE 3] Microwave cooking program works normally, but bake and/or broil cooking programs do not.
Lower heater does not heat up.
Check continuity No continuity
of lower heater
Which heater does
nok hast up'at all? Upper heater does not heat up.
Open lower heater
Normal
Approx: 102 Check continuity of
upper heater
Normal
:
Approx:102
No
continuity
Check
power
relay
Abnormal
N
Check
power
relay
D
(RY
D)
a
C
(RY
C)
Open
upper
heater
Normal
Abnormal
Defective power relay
D (RY D)
Defective D.P.C. See
“TROUBLE 5"
Defective D.P.C. See
“TROUBLE 5"
Defective power relay
C (RY C)