Test 5 Door Switch Test - LG CDE3379WD Service Manual

Test 5
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 electrical shock.
Trouble Symptom
Measurement Condition
BK2 WH1
1 2 1
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 / 2 second intervals.)
After turning dryer power off, measure resistance.
Measure while door is closed. Check it resistance is
below 2500 Ω between WH1- (White wire) and
BK2- Connector
WH1,BL2 after taking WH1,BL2 out from Controller.
Measure while door is open. Check it resistance is
300~60 Ω between WH1- (White wire) and BK2-
(Black wire). Connector WH1,BL2 after taking
WH1,BL2 out from controller.
Measure while door is open. Check it resistance is
below 1 Ω between BL2-
WH1- (White wire) after taking connector WH1,BL2
out from controller.
Measure while door is closed. Check it resistance is
below 1 Ω between BL2-
WH1- (White wire) after taking connector WH1,BL2
out from controller.
Check hontroller.
Check harness-linking connector.
NO
YES
(Yellow wire) and
NO
(Yellow wire) and
YES
43
• Door switch
check (Refer to
YES
component
testing.)
• Check lamp. (When
opening lamp,
replace then
NO
measure again.)
• Door switch check
(Refer to
component testing.)
• Door switch
check (Refer to
YES
component
testing.)
• Door switch
check (Refer to
NO
component
testing.)