KitchenAid KHMS105E Service Manual page 65

Microwave Oven Hood Combo Service Manual — LIT 4317216
COMPONENT
Touch Keyboard (see below).
FPC CONNECTOR
(TOP)
8
9
10
11
12
13
TEST PROCEDURE
Measure the resistance between
the terminal pins of the keypad
(shown below) that you wish to
check.
For example: To measure the
1
"TEMP PROBE" keypad, refer to
2
the illustration, and:
3
4
1.Find the first terminal number
5
along the top bar (pin 4).
6
7
2.Find the second terminal num-
ber in the side bar (pin 8).
8
9
3.Set the ohmmeter to the R x 1
10
scale.
11
12
a) With the keypad not de-
13
pressed, touch the ohmmeter
leads between pins 4 and 8
on the ends of the FPC con-
nector.
b) Press the TEMP PROBE
keypad.
KEYBOARD MATRIX
1 3
2
TEMP
AUTO
BEVERAGE
PROBE
ROAST
FAN
CUSTOM
HIGH / LOW
POPCORN DEFROST
/ OFF
KEEP
WARM
EASY
MINUTE
LIGHT
FAVORITE
ON / NIGHT
RECIPE
/ OFF
AUTO
COOK
4 5
CLOCKSET
6
TIMER
7
SET/START
TIMER
8
CANCEL
DELAY
9
START
MICRO CANCEL
COOK OFF
COOK
POWER START
3-23
Original 03/97
Page 3-23
RESULT
Normal Readings:
KEYPAD NOT PRESSED - In-
dicates more than 1 MΩ re-
sistance.
Normal Readings:
KEYPAD PRESSED - Indicates
less than 400 Ω resistance.
Abnormal Readings:
KEYPAD NOT PRESSED - In-
dicates continuity (zero re-
sistance).
Abnormal Readings:
KEYPAD PRESSED - Indicates
infinite resistance.
6 7
0
1
2
3
4
5