Sharp CD-BA3100 Service Manual

CD-BA3100
– 50 –
T
T
FDO
SPDO
Stopped
CH1=200mV
DC 10:1
CH2=500mV
DC 10:1
500ms/div
1999/04/07 09:51:15
(500ms/div)
NORM:20kS/s
2
1
=Record Length=
Smoothing : ON CH1 : 0.000V
CH2 : 0.000V
Main : 100K
Zoom : 2K
Mode : NORMAL
Type : EDGE CH2
Delay : 2.924ms
Hold off : 0.2µs
CH3 : 0.00V
CH4 : 0.00V
BW : FULL
=Trigger=
=Filter= =Offset=
T
T
TE
DRF
Stopped
CH1=10V
DC 10:1
CH2=1V
DC 10:1
100ms/div
(100ms/div)
NORM:100kS/s
2
1
=Record Length=
Smoothing : ON CH1 : 0.0V
CH2 : 0.00V
Main : 100K
Zoom : 2K
Mode : NORMAL
Type : EDGE CH1
Delay : 2.924ms
Hold off : 0.2µs
CH3 : 0.00V
CH4 : 0.00V
BW : FULL
=Trigger=
=Filter= =Offset=
The tracking servo is not activated.
Check the peripheral circuits at pins 14, 15 and 20 on IC1, and
CNS1A/B.
If the waveform shown in Figure 50-1 appears and soon after
NO DISC appears. ?
(2) Tracking system check
Check the TE waveform at pin 15 on IC1.
A normal jump operation cannot be completed or the beginning of
the track cannot be found.
Check the around pin 20 on IC1.
"Initialization" is possible, but play is not possible. ?
Data cannot be read. Check the VCO-PLL system.
"Initialization" is not possible.
Figure 50-1
Figure 50-2
Press the Disc 1~6 switch without inserting a disc, and then
try starting the play operation.
(3) Spin system check
The spin driver circuit is OK.
1. The turntable rotates a little. ? (Waveform drawing
Figure 50-2)
Check around pin 22 on IC1, pins 26 and 27 on IC2, and CNS3A/B.
2. The turntable doesn't rotate.
No
Yes
No
Yes
Yes
No

Sharp CD-BA3100 Specifications

General

Brand	Sharp
Model	CD-BA3100
Category	Stereo System
Language	English