LG LTCS20020 Series Service Manual page 13

Actions for each number of LED blinking
LED 1 time repeated
1
Blink Off Blink Off Blink
LED 6 times repeated
2
Blink Blink Blink Blink Blink Blink
LED 7 times repeated
3
Blink Blink Blink Blink Blink Blink Blink
Off Blink Off Blink Off Blink Off
Off Blink Blink Blink Blink Blink Blink
Off Blink Blink Blink Blink Blink Blink Blink
AD-offset
Blink Off Blink Off Repeated
Circuit over-
Off Repeated
PCB defect
part (IPM)
Off Repeated
13
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Only training and service purposes.
1. Check normal
operation after
power reset
2. If same error
Error
occurs after 1,
replace PCB.
1. Check normal
operation after
power reset
2. If same error occurs
current
after 1, replace
error
PCB.
3. If same error occurs
after 2, replace
COMP unit.
1. Check normal
operation after
power reset
2. If same error occurs
after 1, replace
PCB.
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