LG DKC880 Manual page 17

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