LG DV286, Service Manual

Page: 19 / 65

3-8
D
Focus on OK?
NO
Proper signals on
A, B, C, D of MT1389E
NO
YES
YES
Check connections between
MT1389E and pick-up head.
Check FEO signal
on MT1389E
NO
Check the FOSO connection
on MT1389E and motor driver.
Check FOSO signal
on MT1389E
Track on OK?
NO
NO
Normal TEO Signal
on MT1389E?
NO
YES
Check the related
circuit on MT1389E
YES
YES
YES
T+ & T- output
properly?
NO
YES
Check the tracking control
amp circuit on motor driver.
Properly TRSO signal
on MT1389E?
NO
YES
Check the TRSO
connection on MT1389E
and motor dirver.
Check cable connection
on pick-up head.
Disc is play ?
Check RFO & RFLVL
signal waveform.
E