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5.4
Troubleshooting (DVD SECTION)
Press OPEN
/CLOSE key
Is tray
operation
correct?
Y
Is the traverse moving
along the innermost
perimeter for SW detection?
Y
"NO DISC" message appears
immediately after vertical
movement of the pick-up lens
N
The state that DISC does not rotate continues for
several seconds, and becomes NO DISC or an
error display afterwards.
The rotation of DISC becomes high-speed and
abnormal, and becomes NO DISC or an error
display afterwards.
N
Is focus retraction OK?
FE
OFF
ON
Even when it retracts
correctly, if it is out of focus
and makes repeated retries
with a clicking sound, it is
in error.
Y
Is tracking retraction OK?
TE
OFF
ON
If TE waveform reappears
or fails to converge after the
TE retraction, it is in error.
Y
Is the spindle servo
locked correctly?
Is the RF OUT waveform
locked correctly?
Y
A
Confirmation of tray drive circuit
N
and circuit in surrounding
N
See "5.5.3 Traverse movement error"
in "Check points for individual errors"
Y
See "5.5.2 Disk detection, distinction error"
in "Check points for individual errors"
Y
See "5.5.1 Spindle startup error"
in "Check points for individual errors"
See "5.5.4 Focus ON error"
N
in "Check points for
individual errors"
See "5.5.5 Tracking ON error"
N
in "Check points for
individual errors"
See "5.5.6 Spindle CLV error"
N
in "Check points for
individual errors"
A
Is the inter-layer jump OK?
FE
LO
Y
Has the disc information
been collected?
Stop will result
Y
Is playback
possible?
Y
OK !
Fig.5-4a
Two layers of DVD only.
N
5.5.8 Inter-layer
jump error
LI
N
5.5.7 Address read
error
Check 5.5.9, 5.5.10, 5.5.11, and
N
5.5.12 items in "Check points
for individual errors"
(No.YD001)1-31
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