3-8
D
Proper signals on A, B, C,
D of MT1389D
Focus ON OK?
Track On OK?
Disc is play ?
E
NO
NO
NO
YES
YES
YES
YES
YES
Check connections between
MT1389D and pick-up head.
NO
Check FEO signal on
MT1389D
YES
Check the FOSO connec-
tion on MT1389D and
motor driver.
NO
Check FOSO signal on
MT1389D
YES
YES
Check the TRSO
connection on MT1389D
and motor dirver.
NO
Check the tracking control
amp circuit on motor driver.
NO
Normal TEO Signal on
MT1389D?
NO
Check the related
circuit on MT1389D
Properly TRSO signal on
MT1389D?
T+ & T- output properly?
Check cable connection on
pick-up head.
Check RFO & RFLVL signal
waveform.
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