LN-742 & LN-742H
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F-20
TROUBLESHOOTING AND REPAIR
F-20
7. Measure the resistance of each key at
plug J10 on the keypad. The resistance
measurements are taken from the pin
locations on plug J10 shown in Figure
F.8.
8. If any of the resistance tests are not
correct per Table F.1, the keypad is
faulty and should be replaced.
PLUG
J10
PIN
#1
(1J10)
PIN
#8
(8J10)
KEYPAD RESISTANCE TEST
(continued)
FIGURE F.8 – KEYPAD RESISTANCE TEST POINTS.