Sharp CD-DP900 (serv.man27) Service Manual ▷ View online
– 49 –
CD-DP900H/E
7
8
9
10
11
12
-
+
SW1
OPEN/CLOSE
SW3
DISC
NUMBER
SW2
CLAMP
M3
T/T UP/DOWN
LOADING
MOTOR
BI4
CNS4
CD LOADING MOTOR PWB-F
TAPE MECHANISM
ASSEMBLY
ASSEMBLY
TAPE MECHANISM PWB-G
RD
WH
BK
WH
BK
WH
WH
BK
1
2
3
4
5
6
2
3
4
5
6
TAPE 2
ERASE HEAD
RECORD/PLAYBACK
HEAD
TAPE 1
PLAYBACK HEAD
WH
BK
GR
GR
BL
YL
WH
PK
PK
BK
BK
WH
WH
PK
GR
2
3
1
P43 10 - C
TO MAIN PWB-A
CNP102
CNP101
P43 11 - C
TO MAIN PWB-A
SOLENOID
PH
SW
1
1
2
3
2
4
5
6
7
8
1
8
CNP702
SW
P44 3 - F
TO DISPLAY PWB-B1
FC702
TAPE
MOTOR
SOLENOID
SW
BL
YL
WH
BK
PK
WH
BK
7 6 5 4 3 2 1
–
+
1
6
Figure 49 WIRING SIDE OF P.W.BOARD (8/8)
CD-DP900H/E
– 50 –
VOLTAGE
0V
0V
0.27V
0V
0V
0V
0.35V
0.37V
1.4V
1.31V
1.32V
1.32V
1.33V
1.18V
0V
2.88V
1.27V
0.75V
1.27V
2.51V
1.32V
0.48V
0.47V
2.86V
0V
1.04V
0V
0V
0.28V
0V
2.88V
0V
0V
0V
0V
1.3V
0V
0V
0V
0V
9
8
7
6
5
4
3
2
1
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
40
39
38
37
36
35
34
33
32
31
PIN
NO.
NO.
VOLTAGE
IC2
PIN VOLTAGE
3.24V
0V
0V
1.49V
3.24V
4.22V
0V
0V
2.87V
2.87V
0V
1.49V
2.88V
1.27V
1.29V
0V
0V
2.88V
0V
0V
0V
0V
0V
4.39V
50
49
48
47
46
45
44
43
42
41
51
64
63
62
61
60
59
58
57
56
55
54
53
52
2.87V
0V
2.88V
2.88V
2.88V
0V
4.39V
4.25V
0V
4.39V
0V
0V
0V
0V
0V
0V
68
67
66
65
69
80
79
78
77
76
75
74
73
72
71
70
2.82V
4.57V
0V
4.58V
5V
0V
0V
4.04V
5.01V
5.01V
2.79V
4.05V
5.01V
5.01V
5.01V
5.01V
5.01V
4.05V
2.83V
5.01V
2.79V
0V
0V
4.9V
0V
0V
4.1V
2.8V
2.82V
2.82V
9
8
7
6
5
4
3
2
1
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
PIN
NO.
NO.
VOLTAGE
IC501
PIN VOLTAGE
2.82V
0.64V
0.64V
2.82V
2.82V
5.18V
3.3V
4.95V
3.74V
4.96V
4.95V
2.82V
2.82V
2.82V
2.81V
2.82V
5.01V
5V
5.01V
5V
0V
3.63V
5.03V
5.03V
40
39
38
37
36
35
34
33
32
31
41
54
53
52
51
50
49
48
47
46
45
44
43
42
5.18V
5.14V
5.03V
5.01V
4.98V
4.93V
58
57
56
55
59
60
60
0V
4.96V
0V
4.54V
0V
0V
4.59V
4.61V
2.35V
1.97V
2.21V
4.74V
0V
4.55V
4.49V
4.48V
4.58V
4.46V
0V
0V
1.19V
0V
0.65V
0V
0.57V
4.7V
0V
4.95V
2.97V
4.95V
0V
4.95V
4.95V
4.95V
4.58V
4.96V
1.85V
4.95V
4.95V
4.82V
9
8
7
6
5
4
3
2
1
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
40
39
38
37
36
35
34
33
32
31
0V
13.25V
13.25V
13.25V
1.94V
3.67V
4.57V
4.45V
4.32V
0V
50
49
48
47
46
45
44
43
42
41
PIN
NO.
NO.
VOLTAGE
IC701
PIN VOLTAGE
0V
4.94V
4.48V
4.94V
4.94V
–19.09V
33.7V
–33.6V
–19.2V
0V
0V
0V
0V
4.49V
0V
0V
0V
0V
4.56V
4.56V
4.56V
0V
–37.5V
–22.81V
60
59
58
57
56
55
54
53
52
51
61
74
73
72
71
70
69
68
67
66
65
64
63
62
–37.4V
–37.4V
–37V
–37.5V
–18.94V
0V
–22.65V
–37.4V
–26.42V
–22.76V
–37.6V
–26.43V
–15.2V
–33.7V
–37.4V
–22.7V
78
77
76
75
79
90
89
88
87
86
85
84
83
82
81
–33.8V
–33.7V
–33.7V
–33.8V
–33.8V
–33.8V
–33.6V
–33.6V
–33.8V
–33.8V
100
99
98
97
96
95
94
93
92
91
80
3.5V
3.49V
0V
0V
1.33V
0V
0.37V
0V
0V
0V
0V
0V
2.43V
0.49V
2.49V
0V
0V
1.09V
0.47V
0V
0V
2.54V
3.49V
0V
3.49V
0V
1.18V
2.65V
0V
0V
0V
0V
0V
0V
0V
2.92V
9
8
7
6
5
4
3
2
1
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
36
35
34
33
32
31
0V
3.54V
3.54V
7.56V
0V
41
0V
42
40
39
38
37
PIN
NO. VOLTAGE
IC1
18.83V
0V
4.94V
3
2
1
PIN
NO.
VOLTAGE
IC801
18.94V
0V
9.9V
3
2
1
PIN
NO.
VOLTAGE
IC802
18.91V
1.32V
13.24V
3
2
1
PIN
NO.
VOLTAGE
IC803
7.81V
13.24V
8.34V
3
2
1
PIN
NO.
VOLTAGE
IC823
4.92V
4.91V
0V
0V
0V
4.94V
4.91V
4.95V
4.91V
4.91V
4.91V
4.92V
9
8
7
6
5
4
3
2
1
12
11
10
4.91V
4.92V
4.92V
4.92V
4.94V
4.91V
4.91V
4.91V
17
16
15
14
13
20
19
18
4.94V
4.94V
9.89V
4.56V
21
24
23
22
PIN
NO.
VOLTAGE
IC401
0V
0.62V
0V
0V
0.58V
2V
1.32V
0.58V
3.36V
3.35V
0V
0V
9
8
7
6
5
4
3
2
1
12
11
10
0V
6.89V
4.11V
3.36V
0.58V
0V
2.52V
0.37V
17
16
15
14
13
20
19
18
3.51V
0.58V
0V
0V
21
24
23
22
PIN
NO.
VOLTAGE
IC101
4.25V
0V
2.11V
4.14V
2.12V
2.11V
0V
2.01V
4.16V
0V
2.98V
2.99V
9
8
7
6
5
4
3
2
1
12
11
10
1.21V
3.1V
1.22V
2.09V
1.9V
2.29V
0V
2.79V
17
16
15
14
13
20
19
18
2.45V
2.44V
4.15V
2.66V
21
24
23
22
PIN
NO.
VOLTAGE
IC303
0V
4.56V
2.07V
0V
0V
0V
4.12V
0V
2.98V
3.1V
4.24V
2.05V
9
8
7
6
5
4
3
2
1
12
11
10
0V
0V
0V
2.07V
4.26V
0.89V
0.89V
1.48V
17
16
15
14
13
20
19
18
0V
2.08V
21
22
22
PIN
NO.
VOLTAGE
IC302
0V
–22.34V
0V
0V
0V
0V
0V
24.83V
–24.87V
0V
0V
–23.54V
9
8
7
6
5
4
3
2
1
12
11
10
0V
0V
0V
15
14
13
PIN
NO.
VOLTAGE
IC901
0V
–32.34V
0V
0V
0V
33.4V
0V
34.6V
–34.6V
0V
0V
–33.5V
9
8
7
6
5
4
3
2
1
12
11
10
0V
0V
0V
15
14
13
PIN
NO.
VOLTAGE
IC902
0V
2.57V
2.63V
2.5V
5.1V
0V
2.36V
2.63V
2.49V
0V
5.18V
5.18V
9
8
7
6
5
4
3
2
1
12
11
10
0V
0V
0V
15
0V
16
14
13
PIN
NO.
VOLTAGE
ICT21
* ICT21
CD-DP900H Only
CD-DP900H Only
*
– 51 –
CD-DP900H/E
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
CD-DP900H/E
– 52 –
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 52-2)
(Waveform drawing Figure 52-2)
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 52-3)
Check the spin system.
If the disc is spinning and a HF waveform is generated,
DRF will go H.
DRF will go H.
Figure 52-1
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 52-1)
(Waveform drawing Figure 52-1)
Check the focus peripheral circuit.
3. Is the laser lit ?
Spindle motor (M1).
4. Is the turntable rotating ?
Figure 52-2
Figure 52-3
Yes
Yes
Yes
No
No
No
No
No
No
No
Yes
Yes
No
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