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Extracted text from sharp cd xp 200h troubleshooting (Ocr-read)
Page 1
CD-XP200H
Ð 38 Ð
Vp-p=1.0 V~1.3 V
0.5 mV/div,0.5 µsec/div
T
FDO
DRF
TE
StoppedCH1=500 mV
DC 10:1CH2=10 V
DC 10:1CH3=1 V
DC 10:1500 ms/div
(500 ms/div)
NORM:20 kS/s
1
2
3
=Record Length=
Smoothing : ON CH1 : 0.000 V
CH2 : 0.0 VMain : 100 K
Zoom : 2 KMode : AUTO
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2 µs CH3 : 0.00 V
CH4 : 0.00 V BW : FULL =Trigger= =Filter= =Offset= -3 div -1 div 0 div +1 div +3 divCH Position ToCH2
Position
0.20 div
T
FDO
TDO
StoppedCH1=500 mV
DC 10:1CH3=500 mV
DC 10:1500 ms/div
(500 ms/div)
NORM:20 kS/s
1
3
=Record Length=
Smoothing : ON CH1 : 0.000 V
CH2 : 0.0 VMain : 100 K
Zoom : 2 KMode : AUTO
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2 µs CH3 : 0.000 V
CH4 : 0.00 V BW : FULL =Trigger= =Filter= =Offset=
CH1
v/DIV
500 mV
If the level is not normal.
1. Is focus servo activated ?
(Waveform drawing Figure 38-2) Pins 7~11, 79 and 80 on IC1
Check the laser diode driver Q1 peripheral circuit. When a disc is loaded, start playback operation.
2. Does DRF change from "L" to "H" ? Is the disc rotating ?
3. Is the HF waveform normal ?
(Waveform drawing Figure 38-3)
Check the spin system.
If the disc is spinning and a HF waveform is generated,
DRF will go H.
Figure 38-1
Check the laser diode driver Q1 peripheral circuit.
(1) Focus-HF system check.
Although a CD is inserted and the cover is closed, "NO
DISC" is displayed.
1. Does the pickup move to the PICKUP-IN Switch (SW4)
position ? Sled motor (M2). Press the OPEN/CLOSE switch (SW1) without inserting a
disc, and try starting the playback operation.
2. Does the focus (lens) move up and down ?
(Waveform drawing Figure 38-1) Check the focus peripheral circuit.
3. Is the laser lit ?
Spindle motor (M1). 4. Is the turntable rotating ?
Figure 38-2Figure 38-3
Yes
Yes
YesNo
No
No
No
No
No
No Yes
YesNo
Page 2
Ð 39 Ð
CD-XP200H
T
T
FDO
SPDO
StoppedCH1=200 mV
DC 10:1CH2=500 mV
DC 10:1500 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 VMain : 100 K
Zoom : 2 KMode : NORMAL
Type : EDGE CH2
Delay : 2.924 ms
Hold off : 0.2 µs CH3 : 0.00 V
CH4 : 0.00 V BW : FULL=Trigger= =Filter= =Offset=
T
T
TE
DRF
StoppedCH1=10 V
DC 10:1CH2=1 V
DC 10:1100 ms/div
(100 ms/div)
NORM:100 kS/s
2
1
=Record Length=
Smoothing : ON CH1 : 0.0 V
CH2 : 0.00 VMain : 100 K
Zoom : 2 KMode : NORMAL
Type : EDGE CH1
Delay : 2.924 ms
Hold off : 0.2 µs CH3 : 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. If the waveform shown in Figure 39-1 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 39-1
Figure 39-2
Press the OPEN/CLOSE 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 39-2)
Check around pin 22 on IC1, pins 15 and 16 on IC3, and CNS3A/B. 2. The turntable doesn't rotate.
NoYes
NoYes
Yes
No