Harman Kardon CDR20 Service Manual page 28

CDR20
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
(CN502)
•Replace the Spindle Motor.
NO
Is there DMO signal input?
(IC509 pin5)
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?
(IC701 pin 7, IC201
pin 95)
YES
OK
28
harman/kardon
NO
•Check the connection of IC201 pin2.
•Replace the IC201(OTI-9790)
NO
•Replace the IC509(NJM3404).
NO
•Check the connection of IC301 pin99.
•Replace the IC701(MICOM)
NO
•Check the connection of IC701 pin94.
•Replace the IC701(MICOM)
NO
•Check the connection of IC510 pin19.
•Replace the IC501(BA6664FM)