Diagnosis & Troubleshooting; Touch Panel Continuity Test; Microwave Oven Power Output Test - Whirlpool GM8155XJQ Job Aid

DIAGNOSIS & TROUBLESHOOTING

TOUCH PANEL CONTINUITY TEST

1. Remove the electronic oven control from
the microwave oven (see page 2-3 for the
procedure).
2. Set the ohmmeter to the R x 1 scale.
3. Refer to the "Touch Panel Continuity Dia-
gram," and touch the ohmmeter leads to the
indicated conducting paths on the "Flex
Circuit Connector Diagram." Press the key-
pad indicated in the chart for the circuit
under test. The meter should indicate con-
tinuity if the switch is working properly.
Electronic Oven Control Board Layout
13-Pin Flex
Connector
Relay 7
Relay 8
Relay 1
9-Pin Connector
MICROWAVE OVEN
POWER OUTPUT TEST
The power output of the magnetron can be
measured by the following test: (for accurate
results, the line voltage must be 120 VAC and
the oven cavity must be clean).
1. Fill a glass measuring cup with one cup
(250 ml) of "lukewarm" (68˚F / 20˚C) to
(77˚F / 25˚C) tap water.
Sensor
Connector
Relay 4
Buzzer
Relay 2
Low Voltage
Transformer
2. Place the cup of water in the center of the
3. Operate the microwave oven at HIGH
4. The water should boil within 3-1/2 to 4
NOTE: Times longer than 4 minutes may indi-
cate that the operating voltage is lower than
110 volts, or that there is a problem with the
oven.
4-1
Touch Panel Continuity Diagram
1 2 3
SENSOR SENSOR SENSOR
DEFROST
POPCORN REHEAT COOK
8
HOUR HOUR MINUTE
OPTIONS
UP DOWN
9
OFF/ JET START
N.C. MICRO
CANCEL /ENTER
10
N.C. N.C. N.C.
11
BAKED
POULTRY FISH
MEAT
GOODS
12
TEMP/POWER TEMP/POWER
COMBI.
N.C.
UP
13
Flex Circuit Connector Diagram
13 12 11 10 9 8 7
oven.
power.
minutes.
4 5 6 7
WARM TIMER CLOCK
HOLD SET/OFF SET
MINUTE SECOND SECOND
UP DOWN UP DOWN
N.C. N.C. N.C.
N.C. N.C. N.C. N.C.
SNACK OTHER
CONVECT
FOODS
FOODS
N.C. N.C. N.C.
DOWN
6 5 4 3 2 1