Sled Operating Is Abnormal - LG HB954TB Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

4. SLED OPERATING IS ABNORMAL

Sled operating is abnormal.
Is there sled
control signal output?
(LIC501 Pin56,57)
Is there
sled drive voltage input?
(LIC201 Pin2,3 )
Is there
sled drive voltage output?
(LIC201 Pin6,8,9,10)
Is there
sled drive voltage output?
(LPM302 Pin1,2,3,4)
Check the connection LPM302.
YES
YES
YES
YES
NO
Replace the LIC501.
NO
Check the PCB pattern and components
between LIC501 and LIC201 sled signals
NO
Check the LIC201.
NO
Replace the sled motor.
4-5