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TROUBLESHOOTING
GUIDE
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§
1 . Check grounding before checking for trouble.
_
,
¢
2 . Be careful of the high voltage circuit.
:
;
. Discharge the high voltage capacitor (see page 15)
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BWwWN
=
. When
checking the continuity of the switches of transformer, disconnect one lead wire from these parts and then
& 5. Do not touch any part of the circuitry on the digital programmer circuit since static electric discharge may damage
check continuity with the AC plug removed.
To do otherwise may result in a false reading or damage to your meter.
this control panel.
Always touch yourself to ground while working on this panel to discharge any static charge built
up in your body.
DLL EID CLI PLD CLD CID CAI CSD LISD CLI CSS ALD CLD LD CLI CLS LS CLS ELS CS LSD CLS LID SSD SLD SSD CHD CSS CSP SLI CAS CSD CSS SD CAI CLI CLY AS ELI SSI LI CAI PIPED)
First of all operate the microwave oven following the correct operating procedures described on pages 3 to 10 either by time
cooking or in case of NE-7910, NE-7910C auto sensor cooking, in order to find the exact cause of any trouble.
[TROUBLE 1]
The following visual conditions indicate a probable defective digital programmer circuit
(D.P.C.).
1.
Incomplete segments
Auto Sensor
Cook Indicator
Light
A.»
Segments missing.
Defrost Indicator Light
Power Indicator Light
B.
Partial segments missing.
C.
Digit
flickering
other
than
normal
fluorescent
slight flickering.
D.
Colon does not turn on or does not blink when the
clock set button is pressed.
2.
A
distinct
change
in the
brightness
of one
or more
;
;
High © M.High
numbers in the display.
One or more digits in the display not on when they should be.
Wrong or no power indicator light for power level selected.
(Fig. 36)
5.
Display indicates
a number different from one touched.
For example, touch 5, and 3 appears in the display
6.
Specific numbers (for example 2 or 3) will not display.
7.
Display does not count down with time cooking or when using display as a timer.
8.
Display does not count up with clock operation.
9.
Oven is programable and cooks normally but no display shows.
10.
Display obviously jumps in time while counting down or up.
11.
Display counts down noticoably too fast while cooking.
12
Display can not shift from the first stage cooking to the second stage cooking while 2-phase cooking.
13.
Display does not stop counting down with time cooking even when stop pad (button) is tapped.
14.
TOD does not reappear when cooking is finished.
—27-—
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Table of Contents
Troubleshooting
