Sharp SD-EX220H, Руководство по обслуживанию

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SD-EX220H
7 – 4
T
T
DOUT
Stopped
CH1=2 V
DC 10:1
500 ns/div
1999/04/07 09:25:28
(500 ns/div)
NORM:200 MS/s
1
=Record Length=
Smoothing : ON CH1 : 0.00 V
CH2 : 0.00 V
Main : 1 K
Zoom : 100
Mode : NORMAL
Type : EDGE CH1
Delay :
2.887 ms
Hold off : 0.2
∝
s
CH3 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger= =Filter= =Offset=
T
FDO
PDO2
PDO1
Stopped
CH1=500 mV
DC 10:1
CH3=1 V
DC 10:1
CH4=1 V
DC 10:1
500 ms/div
(500 ms/div)
NORM:20 kS/s
1
4
3
=Record Length=
Smoothing : ON CH1 : 0.000 V
CH2 : 0.0 V
Main : 100 K
Zoom : 2 K
Mode : AUTO
Type : EDGE CH2
Delay :
0.0 ns
Hold off : 0.2
∝
s
CH3 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger= =Filter= =Offset=
CH1
v/DIV
500 mV
1999/04/05 17:33:17
Is pin 52 (C2F) on IC1 "L" ?
Yes
No
The HF waveform is normal and the time is displayed
normally, but no sound is produced. Or the sound
has dropouts.
2-5 Others.
There are too many error flags on a damaged disc which
makes error correction impossible.
Check again using a known good disc.
1. When playing at normal speed
Check the peripheral circuit at pin 39 (DOUT) on IC1 and
the waveform (Figure 7-4-2).
If OK, Check the unit.
When a disc is loaded, start play operation.
2-4 PLL system check.
The HF waveform is normal, but the TOC data cannot be
read.
Check the PDO waveform. (Figure 7-4-1)
Check around pins 73~78 on IC1.
Figure 7-4-1
Figure 7-4-2