COMPONENT

TEST PROCEDURE

RESULT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Relay 2

Set the ohmmeter to the R x 1

 

 

 

 

 

 

 

WARNING: When you apply

scale, and check

for continuity

 

 

 

 

 

 

 

between the two

relay terminal

 

 

 

 

 

 

 

power to the unit, be careful

 

 

 

 

 

 

 

pins. Use the following steps.

 

 

 

 

 

 

 

not to touch any of the high

 

 

 

 

 

 

 

1.Remove the wire connectors

 

 

 

 

 

 

 

voltage circuits.

 

 

 

 

 

 

 

 

from the relay terminals.

 

 

 

 

 

 

 

 

2.Use a pair of alligator clips,

 

 

 

 

 

 

 

 

and clip the ohmmeter leads

 

 

 

 

 

 

 

 

to the two terminals of the re-

 

 

 

 

 

 

 

 

lay. Make sure that you do not

 

 

 

 

 

 

 

 

allow the clips to short to any-

 

 

 

 

 

 

 

 

thing.

 

 

 

 

 

 

 

 

 

3.Plug the microwave oven into

 

 

 

 

 

 

 

 

an AC receptical.

 

 

 

 

 

 

 

 

 

∞

0

 

∞

0

 

 

4.Set the power level, as shown

 

 

 

 

in the chart in the right col-

 

 

 

 

 

 

 

 

umn, and check the relay op-

 

 

 

 

 

 

 

 

eration for the ten power lev-

 

 

 

 

 

 

 

 

els. NOTE: During the operat-

 

CLOSED

OPEN

 

ing time set for each level, the

 

 

 

 

 

 

 

 

relay will close (short) for the

 

 

 

 

 

 

 

 

time specified in the chart, and

 

 

 

 

 

 

 

 

then open for another speci-

 

 

 

 

 

 

 

 

fied amount of time. When the

 

 

 

 

 

 

 

 

open time elapses, the cycle

 

 

 

 

 

 

 

 

begins again until the cooking

 

 

 

 

 

 

 

 

time elapses and the oven

 

 

 

 

 

 

 

 

turns off.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CONTROL CIRCUIT BOARD CHECK LIST

The following problems indicate a defective control circuit board:

1.The START function fails to operate, but the high voltage systems, the interlock switches, the door sensing, and the relay checks are good.

2.The oven operates okay with a replace- ment relay installed.

3.Proper temperature measurements can- not be obtained.

4.The buzzer does not sound, or continues to sound.

5.Some segments of one or more digits do not light up, or they continue to light up, or segments light when they should not.

6.Wrong figures appear on the display.

7.The digits on the display flicker.

8.Some of the indicators do not light.

9.The clock does not keep the proper time.

3-24

Page 65 Page 67
Page 66
Image 66
KitchenAid KHMS105E service manual Control Circuit Board Check List, Voltage circuits
Page 65 Page 67

KHMS105E specifications

The KitchenAid KHMS105E is a versatile and efficient microwave oven designed to enhance your cooking experience. With a sleek and modern design, it seamlessly fits into any kitchen decor while providing robust functionality.

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