Sharp CD-XP700H (serv.man18) Service Manual ▷ View online
– 37 –
CD-XP700H
T
T
DATA
DATACK
LRSY
Stopped
CH1=2 V
DC 10:1
CH2=2 V
DC 10:1
CH3=2 V
DC 10:1
5
µ
s/div
(5
µ
s/div)
NORM:100 kS/s
1
2
3
=Record Length=
Smoothing : ON
CH1 : 0.00 V
CH2 : 0.00 V
CH2 : 0.00 V
Main : 5 K
Zoom : 100
Zoom : 100
Mode : AUTO
Type : EDGE CH3
Delay : 0.0 ns
Hold off : 0.2
Type : EDGE CH3
Delay : 0.0 ns
Hold off : 0.2
µ
s
CH3 : 0.00 V
CH4 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
CH3
v/DIV
2 V
v/DIV
2 V
1999/04/05 20:50:17
10
IC1 58
IC1 59
IC1 60
11
12
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
CH2 : 0.00 V
Main : 1 K
Zoom : 100
Zoom : 100
Mode : NORMAL
Type : EDGE CH1
Delay : 2.887 ms
Hold off : 0.2
Type : EDGE CH1
Delay : 2.887 ms
Hold off : 0.2
µ
s
CH3 : 0.00 V
CH4 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
9
IC1 39
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
CH2 : 0.0 V
Main : 100 K
Zoom : 2 K
Zoom : 2 K
Mode : AUTO
Type : EDGE CH2
Delay : 0.0 ns
Hold off : 0.2
Type : EDGE CH2
Delay : 0.0 ns
Hold off : 0.2
µ
s
CH3 : 0.00 V
CH4 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
CH1
v/DIV
500 mV
v/DIV
500 mV
1999/04/05 17:33:17
1
IC1 21
7
IC1 73
8
IC1 74
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=
1
IC1 21
6
IC1 22
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=
3
IC1 67
4
IC1 15
Vp-p=1.0 V~1.3 V
0.5 mV/div,0.5
µ
sec/div
5
IC1 4
T
FDO
DRF
TE
Stopped
CH1=500 mV
DC 10:1
CH2=10 V
DC 10:1
DC 10:1
CH3=1 V
DC 10:1
500 ms/div
(500 ms/div)
NORM:20 kS/s
1
2
3
=Record Length=
Smoothing : ON
CH1 : 0.000 V
CH2 : 0.0 V
CH2 : 0.0 V
Main : 100 K
Zoom : 2 K
Zoom : 2 K
Mode : AUTO
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2
µ
s
CH3 : 0.00 V
CH4 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
-3 div
-1 div
0 div
+1 div
+3 div
CH Position To
CH2
Position
0.20 div
Position
0.20 div
1
IC1 21
3
IC1 67
4
IC1 15
T
FDO
TDO
Stopped
CH1=500 mV
DC 10:1
CH3=500 mV
DC 10:1
500 ms/div
(500 ms/div)
NORM:20 kS/s
1
3
=Record Length=
Smoothing : ON
CH1 : 0.000 V
CH2 : 0.0 V
CH2 : 0.0 V
Main : 100 K
Zoom : 2 K
Zoom : 2 K
Mode : AUTO
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2
µ
s
CH3 : 0.000 V
CH4 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
CH1
v/DIV
500 mV
v/DIV
500 mV
1
IC1 21
2
IC1 20
WAVEFORMS OF CD CIRCUIT
CD-XP700H
– 38 –
HOW TO USE
CAUTION
Cleaning fluid
Cleaner disc
Using the brush in the cleaner cap, apply 1 or 2 drops of the cleaning fluid to the
brush on the CD cleaner disc which has the mark next to it.
Place the CD cleaner disc onto the CD disc tray with the brush side down,then
press the play button.
You will hear music for about 20 seconds and the CD player will automatically stop.
If it continuous to turn, press the stop button.
1.
2.
3.
The CD lens cleaner should be effective for 30-50 operations, however if the
brushes become worn out earlier then please the cleaner disc.
If the CD cleaner brushes become very wet then wipe off any excess fluid with a soft
cloth.
Do not drink the cleaner fluid or allow it to come in contact with the eyes. In the
event of this happening then drink and / or rinse with clean water and seek medical
advice.
The CD cleaner disc must not be used on car CD players or on computer CD-ROM
drives.
All rights reserved. Unauthorized duplicating, broadcasting and renting this product
is prohibited by law.
Parts code
1.
CD optical pickup Lens cleaner disc
UDSKA0004AFZZ
TROUBLESHOOTING
When the CD does not function
When the CD section does not operate when the objective lens of the optical pickup is dirty, this section may not operate. Clean
the objective lens, and check the playback operation. When this section does not operate even after the above step is taken, check
the following items.
Remove the cabinet and follow the trouble shooting instructions.
"Track skipping and/or no TOC (Table Of Contents) may be caused by build up of dust other foreign matter on the laser pickup
lens. Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below."
the objective lens, and check the playback operation. When this section does not operate even after the above step is taken, check
the following items.
Remove the cabinet and follow the trouble shooting instructions.
"Track skipping and/or no TOC (Table Of Contents) may be caused by build up of dust other foreign matter on the laser pickup
lens. Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below."
Turn the power off.
Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol.
Do not touch the lens with the bare hand.
Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol.
Do not touch the lens with the bare hand.
When a CD cannot be played
1. "E-CD01" is displayed.
(1) Check the power to IC1 (LC78645NE), the presence of the clock signal (33.8688 MHz) and the status of the RESET terminal
(pin 66 on IC1).
(2) Does the pickup move to the PICKUP IN Switch (SW4) position?
(pin 66 on IC1).
(2) Does the pickup move to the PICKUP IN Switch (SW4) position?
If (1) and (2) are OK, check the system microcomputer (especially the communication line with the DSP).
2. Pressing the CD operation key is accepted, but playback does not occur.
(1) Focus-HF system check
(2) Tracking system check
(3) Spin system check
(4) PLL system check
(5) Others
(2) Tracking system check
(3) Spin system check
(4) PLL system check
(5) Others
– 39 –
CD-XP700H
Vp-p=1.0 V~1.3 V
0.5 mV/div,0.5
µ
sec/div
T
FDO
DRF
TE
Stopped
CH1=500 mV
DC 10:1
CH2=10 V
DC 10:1
CH3=1 V
DC 10:1
500 ms/div
(500 ms/div)
NORM:20 kS/s
1
2
3
=Record Length=
Smoothing : ON
CH1 : 0.000 V
CH2 : 0.0 V
CH2 : 0.0 V
Main : 100 K
Zoom : 2 K
Zoom : 2 K
Mode : AUTO
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2
µ
s
CH3 : 0.00 V
CH4 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
-3 div
-1 div
0 div
+1 div
+3 div
CH Position To
CH2
Position
0.20 div
Position
0.20 div
T
FDO
TDO
Stopped
CH1=500 mV
DC 10:1
CH3=500 mV
DC 10:1
500 ms/div
(500 ms/div)
NORM:20 kS/s
1
3
=Record Length=
Smoothing : ON
CH1 : 0.000 V
CH2 : 0.0 V
CH2 : 0.0 V
Main : 100 K
Zoom : 2 K
Zoom : 2 K
Mode : AUTO
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2
µ
s
CH3 : 0.000 V
CH4 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
CH1
v/DIV
500 mV
v/DIV
500 mV
If the level is not normal.
1. Is focus servo activated ?
(Waveform drawing Figure 39-2)
(Waveform drawing Figure 39-2)
Pins 7~11, 79 and 80 on IC1
Check the laser diode driver Q1 peripheral circuit.
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 39-3)
Check the spin system.
If the disc is spinning and a HF waveform is generated,
DRF will go H.
DRF will go H.
Figure 39-1
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.
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.
disc, and try starting the playback operation.
2. Does the focus (lens) move up and down ?
(Waveform drawing Figure 39-1)
(Waveform drawing Figure 39-1)
Check the focus peripheral circuit.
3. Is the laser lit ?
Spindle motor (M1).
4. Is the turntable rotating ?
Figure 39-2
Figure 39-3
Yes
Yes
Yes
No
No
No
No
No
No
No
Yes
Yes
No
CD-XP700H
– 40 –
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 40-1 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 40-1
Figure 40-2
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 40-2)
Check around pin 22 on IC1, pins 15 and 16 on IC2, and CNS3A/B.
2. The turntable doesn't rotate.
No
Yes
No
Yes
Yes
No
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