LG CED-8081B Service Manual page 12

Spindle operating is abnormal
Is there
Spindle control signal input?
(IC510 pin 22)
YES
Is there
Spindle drive voltage output?
(IC510 pin 2, 4, 7)
YES
•
Check the Spindle
Connector(PN502)
•
Replace the Spindle Motor.
NO
Is there
DMO signal input?
(IC509 pin 5)
YES
Is there Spindle
control signal output?
(IC509 pin 7)
YES
Replace the IC508(BU4053).
NO
Is SPNON signal "H"?
(IC510 pin 23)
YES
Is SBRK signal "L"?
(IC510 pin 18)
YES
Is there a
SPNFG signal input?
(IC301 pin 62, IC201 pin 7)
YES
OK
NO
•
Check the connection of IC201 pin 2.
•
Replace the IC201(OTI-9790).
NO
•
Replace the IC509(NJM3404).
NO
•
Check the connection of IC301 pin 14.
•
Replace the IC301(MICOM).
NO
•
Check the connection of IC301 pin 30.
•
Replace the IC301(MICOM).
NO
•
Check the connection of IC510 pin 19.
•
Replace the IC510(BA6664FM).
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