LG TCD1870QGS Service Manual page 39

Test 4
Door switch test
WARNING
• Before measuring resistance, be sure to turn power off, and do voltage discharge. (When discharging,
contact the metal plug of power cord with the earth line.)
• Failure to follow these instructions can result in death or electric shock.
Trouble Symptom
Measurement Condition
BK2 YL3
1
Door opening is not sensed. (During operation, when opening door, drum motor and
Heater run continuously) Door close is not sensed.
(Drum motor will not operate. Display will flash at 1/
Turn the dryer's power off, then measure resistance.
Measure while door&lint filter are closed.Check it
resistance is over 1‰ between CN3 -
and CN5- 3 connector for Main PCB
Measure while door&lint filter are open.Check it
resistance is over 1‰ between CN3 -
and CN5- 3 connector for Main PCB
Check hontroller.
Check harness-linking connector.
or
1 2
NO
or
1 2
YES
39
• Door switch
check (Refer to
YES
component
testing.)
• Door switch check
(Refer to
NO
component
testing.)