Troubleshooting - JVC XV-N330BUS Service Manual

5.1 Servo volume
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
SECTION 5

TROUBLESHOOTING

Confirmation of tray drive circuit
N
and circuit in surrounding
N
See "5.2.3 Traverse movement error"
in "Check points for individual errors"
Y
See "5.2.2 Disk detection, distinction error"
in "Check points for individual errors"
Y
See "5.2.1 Spindle start error"
in "Check points for individual errors"
See "5.2.4 Focus ON error"
N
in "Check points for
individual errors"
See "5.2.5 Tracking ON error"
N
in "Check points for
individual errors"
See "5.2.6 Spindle CLV error"
N
in "Check points for
individual errors"
A
Is the inter-layer jump OK?
FE
LO
Has the disc information
been collected?
Stop will result
Is playback
possible?
OK !
Fig.1
Two layers of DVD only.
N
5.2.8 Inter-layer
jump error
LI
Y
N
5.2.7 Address
read error
Y
Check 5.2.9 to 5.2.12
N
items in "Check points
for individual errors"
Y
(No.YD095)1-19