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~<-s* TROUBLESHOOTING
GUIDE
=.
'
CAUTION
4. Check grounding before checking for trouble.
2. Be careful of the high voltagé circuit.
5. Do not touch any parts of the circuitry on the digital programmer circuit, since static electric discharge may damage
this control panel.
:
;
:
AAINAG
Always touch yourself to ground while working on this panel to discharge any static charge in your body.
6. A 120V AC is present at the shaded area
of the digital programmer. circuit (Terminals of power relay B.and
primary circuit of low voltage transformer). When troubleshooting, be cautious of possible electrical.
shock hazard.
First of all operate the microwave oven following the correct operating procedures in order to find the exact cause of any trouble.
{TROUBLE 1} Oven does not start cooking
No
:
Does display show
;
Yes
any figure?
:
| Set power and cooking
time and then tap
start pad
Is fuse blown?
~<
o
a
Is fan motor
_
rotating?
Proceed to
No
"TROUBLE 2"
No
/ Check thermal
Abnormal
Defective Primary latch
cutout
switch (NOTE 1)
eee
Yes
Defective thermal
No
' Is 120V applied to
cutout (NOTE 2)
high voltage
. transformer?
Normal
'
2
he y s
Sak Yes" a
Check low voltage
Aaneenal
a
isisa2\Vvoc
\
Defective H.V.T., Diode,
«transformer
Ea
:
°
applied to power
s
relay B? (RY 2)
or Magnetron,
Normal
:
;
:
Yes
Defective D.P.C. See
ee
o t
Defective D.P.C. See
"TROUBLE 4"
:
Defective L.V.T.
"TROUBLE 4"
NOTE 1: See "Component Test Procedure" and "Measurements and
Adjustments" on previous pages. —
:
Defective power relay'
|
B (RY 2)
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