LG CED-8081B Service Manual page 11

Sled operating is abnormal.
Is there Sled
control signal output?
(IC409 pin 7)
YES
Is there Sled drive voltage
input? (IC501 pin 23)
YES
Is there
Sled drive voltage output?
(IC501 pin 17, 18)
YES
Is there
HALL/SLDOUT signal
input? (IC301 pin 39)
YES
Is there
SLED FG signal input?
(IC301 pin 63)
YES
OK
52
NO
Check the communication line
between IC409 and IC301.
NO
•
Check the connction of IC502 pin 17.
•
Replace the IC502(BA5925FA)
NO
Is Act_Mute signal 'L'?
(IC501 pin 9)
YES
Replace the IC501 (BA5983).
Is there
NO
HALL 1 signal input?
(IC508 pin 3)
NO
NO
Check the IC502(BA5925).
•
Check the Connector(PN501).
•
Replace the SLED Motor.
NO
Replace the IC409.
NO
Check the connection of IC301
pin 13.
YES
Replace the IC508 (BU4053).