LG MDT505 - Focus and Tracking Signal Verification

3-14
NO
NO
NO
Check connections between
MT1389SE/GH and pick-up head.
Check the related circuit on
MT1389SE/GH CD_DVDCT.
Check the related circuit on
MT1389SE/GH.
Check the TRACK connection
on MT1389SE/GH and motor driver.
Check the tracking control amp
circuit on motor driver.
NO
NO
NO
YES
Proper
TRACK signal
on MT1389SE/GH.
YES
T+ & T- output
properly?
YES
E
D
YES
Check CD_DVDCT connection
between S3053 and
MT1389SE/GH.
Check cable connection
on pick-up head.
YES
YES
Proper
signals on A, B, C,
D of MT1389SE/GH.
Proper
CD_DVDCT signal on
MT1389SE/GH.
Focus on ok?
NO
Disc Playback?
NO
YES
Proper
CD_DVDCT signal on
MT1389SE/GH.
YES
YES
Track On OK?
Check RF signal waveform.