CD-C471
Playback can only be performed
disc is
l
o
a
d
e
d
.
. .
Is the Focus servo active? (Can you hear it working?)
Yes
No
Check the laser diode driver.
Check the area around
(21) (focus servo circuit).
No
If the disc is not turning, the DRF
should not change to
Check the spin system.
Yes
Yes
Is HF waveform normal (see the Fig.
Yes
Check the tracking system.
H i
(When playing
back the disc)
Waveform is unstable.
Yes
Check the spin system.
0.5s
ICI
FD
Waveform in case of
normal play-back
0.55
10.0
ICI
DRF
2.00
Figure
Figure 42-2
l
--
Check waveform of
pin 7 (TE).
Check the periphery of
pins 41 and 42.
The waveform shown in Fig.
42-3 appears, and no-disc
Tracking servo is
Yes
inoperative.
state appears soon.
Although IL is possible,
is impossible.
Yes
Check the VCO-PLL system.
Figure 42-3
Summary of Contents for CD-C471 W
Page 16: ... I I Ill I i c r __ __ I Figure 16 BLOCK DIAGRAM 2 3 16 ...
Page 17: ...CD C471 W w UTER lC56115621563 N5M4558L lC562 1 2 Figure 17 BLOCK DIAGRAM 3 3 17 ...
Page 36: ... POWER PWB B 1 MAII IUPWB P33 7 A 1 2 3 4 5 6 Figure 36 WIRING SIDE OF P W BOARD 6 8 36 ...
Page 54: ...CD C471 W MEMO 54 ...
Page 70: ......
Page 71: ...CD C471 W MEMO ...
