LG RCT689H Service Manual page 124

Sled operating is abnormal.
Is there Sled
control signal output?
(LIC201 pin75,
76)
YES
Is there
Sled drive voltage
input? (LIC301
pin25, 26)
YES
Is there
Sled drive voltage
output? (LIC301 pin29,
30, 31, 32)
YES
Is there
Sled drive voltage
output? (LPM302 pin1,
2, 3, 4)
YES
Check the
Connection LPM302.
NO
NO
Check the LR319, LR320.
Is CTL2
NO
signal "H"?
(LIC301 pin17)
YES
Replace the LIC301.
NO
Replace the Sled Motor.
5-5
Replace the LIC201.
NO Check the connection of
LIC101 pin27.
YES
Replace the LIC101.