Read Sharp XL-HP500 (serv.man16) Service Manual online
XL-HP500E
XL-HP500H
– 46 –
T
T
FDO
SPDO
Stopped
CH1=200 mV
DC 10:1
CH2=500 mV
DC 10:1
500 ms/div
1999/04/07 09:51:15
(500 ms/div)
NORM:20 kS/s
2
1
=Record Length=
Smoothing : ON
CH1 : 0.000 V
CH2 : 0.000 V
CH2 : 0.000 V
Main : 100 K
Zoom : 2 K
Zoom : 2 K
Mode : NORMAL
Type : EDGE CH2
Delay : 2.924 ms
Hold off : 0.2
Type : EDGE CH2
Delay : 2.924 ms
Hold off : 0.2
µ
s
CH3 : 0.00 V
CH4 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
T
T
TE
DRF
Stopped
CH1=10 V
DC 10:1
CH2=1 V
DC 10:1
100 ms/div
(100 ms/div)
NORM:100 kS/s
2
1
=Record Length=
Smoothing : ON
CH1 : 0.0 V
CH2 : 0.00 V
CH2 : 0.00 V
Main : 100 K
Zoom : 2 K
Zoom : 2 K
Mode : NORMAL
Type : EDGE CH1
Delay : 2.924 ms
Hold off : 0.2
Type : EDGE CH1
Delay : 2.924 ms
Hold off : 0.2
µ
s
CH3 : 0.00 V
CH4 : 0.00 V
CH4 : 0.00 V
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.
Check the peripheral circuits at pins 14, 15 and 20 on IC1, and
CNS1A/B.
If the waveform shown in Figure 46-1 appears and soon after
NO DISC appears ?
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.
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 46-1
Figure 46-2
Press the OPEN/CLOSE switch without inserting a disc, and
then try starting the play operation.
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 46-2)
Check around pin 22 on IC1, pins 15 and 16 on IC3, and CNS3A/B.
2. The turntable doesn't rotate.
No
Yes
No
Yes
Yes
No
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