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Check the TE waveform at pin 18 on IC1.
If the waveform shown in Figure 45-1 appears and soon after
NO DISC appears.
No
"Initialization" is possible, but play is not possible.
No
"Initialization" is not possible.
(3) Spin system check
Press the OPEN/CLOSE switch without inserting a disc, and
then try starting the play operation.
1. The turntable rotates a little. (Waveform drawing 45-2)
No
2. The turntable doesn't rotate.
All manuals and user guides at all-guides.com
Yes
Yes
Yes
– 45 –
The tracking servo is not activated.
Check the peripheral circuits at pins 18 and 19 on IC1, pin 23 on
IC2, and CNS1A/B.
A normal jump operation cannot be completed or the beginning of
the track cannot be found.
Check the around pin 23 on IC2.
Data cannot be read. Check the VCO-PLL system.
T
Stopped
CH1=200mV
CH2=500mV
DC 10:1
DC 10:1
T
FDO
2
SPDO
1
=Filter=
=Offset=
=Record Length=
Smoothing : ON
CH1 :
0.000V
Main :
BW : FULL
CH2 :
0.000V
Zoom :
CH3 :
0.00V
CH4 :
0.00V
Figure 45-1
The spin driver circuit is OK.
Check around pin 25 on IC2, pins 15 and 16 on IC3, and CNS3A/B.
T
Stopped
CH1=200mV
CH2=500mV
DC 10:1
DC 10:1
T
FDO
2
SPDO
1
=Filter=
=Offset=
=Record Length=
Smoothing : ON
CH1 :
0.000V
Main :
BW : FULL
CH2 :
0.000V
Zoom :
CH3 :
0.00V
CH4 :
0.00V
Figure 45-2
CD-BK2100V
1999/04/07 09:51:15
500ms/div
(500ms/div)
NORM:20kS/s
=Trigger=
100K
Mode : NORMAL
2K
Type : EDGE CH2
Delay :
2.924ms
Hold off :
0.2µs
1999/04/07 09:51:15
500ms/div
(500ms/div)
NORM:20kS/s
=Trigger=
100K
Mode : NORMAL
2K
Type : EDGE CH2
Delay :
2.924ms
Hold off :
0.2µs
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