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DANGER OF HIGH VOLTAGE
4000
volts exist at the high voltage area.
Do not operate
the oven with the cabinet parts removed.
Do not remove
the cabinet parts unless the power cord is unplugged from
wall outlet.
Determine whether or not any defect exists in the control
panel block or others first.
The control panel assembly consists of Key Board As-
sembly and PC Board Assembly.
1. Troubleshooting
by unit replacement according to
the symptoms indicated
1-1. Key Board Assembly
(A) When touching the pads, a pad produces no signal
at all.
(B) When touching a numeral pad, two figures or more
are displayed.
(C) When touching any pads, sometimes the pad
produces no signal.
(D) Only one indicator does not light up.
1-2. PC Board Assembly
The following symptoms indicate a defective PC board
assembly.
Replace the PC board assembly.
(A) In connection with keyboard
a. When touching any pad, a certain group of pads
do not produce the signal.
b. When touching any pad, the pad produce no signal.
c. Clock does not operate properly.
(B) Fluorescent Display
a. The corresponding segments of all digits do not
light up, or they continue lighting up.
b. Wrong figure appears.
c. The figures of all digits flicker.
(C) Other possible troubles
a. Buzzer does not sound or continues sounding.
b. When convection cooking, broil cooking or com-
bination cooking is started, ERR 1 appears, then
the oven sensor is fault.
_ 1-3, Check the oven sensor
if the oven sensor does not fall into the value between
maximum and minimum, it is. fault.
(Example: Resistor is 219KQ+12% at 25°C. Refer to
Fig. 33, 34).
28
Circuit Tester
kQ
Resister
+12%
t
{
|
t
1
t
40
Oven Sensor Temperature
(Fig. 34)
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