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?-9970,
NE-9970C
'-9870, NE-9870C
i
{TROUBLE 2] Oven does not operate at all; Display window does not display any figures and no key in of any pads
will be accepted.
1. 15A fuse blows (For NE-9970, NE-9870)
RESULT
REMEDY
Shorted contacts of short
Replace power relay C, latch
switch A (secondary) and short
switch
Check continuity of short
switch with door closed
Continuity
No continuity
(Replace 15A fuse)
NOTE: All these switches and
power relay C must be re-
placed at the same time (refer
to page 29 for adjustment in-
structions.)
Shorted contacts of latch
tinuity
of
er
Check continuity of pow
switch A and power relay C
relay C's contacts and latch
switch A's contacts with door
partially open until short switch
contacts close
Both continuity
One has continuity and the
other does not
Shorted contacts of power re-
lay C and incorrect operation
of latch switch A
Both no continuity
Defective high voltage capa-
citor
Disconnect one side of lead
wire connected from high vol-
Replace
tage transformer to the high
voltage capacitor and operate
the unit.
Defective high voltage trans-
15A fuse again blows
fonner
Replace
.
1". 15A fuse blows (For NE-9970C, NE-9870C)
RESULT
REMEDY
Shorted contacts of short
Replace latch switch A
(secondary) and short switch
Check continuity of short
switch with door closed
Continuity
No continuity
(Replace 15A fuse)
NOTE: All these switines
must be replaced at tre same
'time (refer to page 24 for
adjustment instructions.)
Shorted contacts of latch
switch A
Continuity
Check continuity of latch
switch A's contacts with door
Partially open until short switch
contacts close
No continuity
Defective high
vol
-
citor
g
lege eae
Replace
Defective high voltage trans-
former
Replace
Disconnect one side of lead
wire connected from high vol-
.
tage transformer to the high
voltage capacitor and operate
the unit.
15A fuse again blows
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