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Model
CD-MPX880H
Pages
84
Size
13.51 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System
File
cd-mpx880h.pdf
Date
PREV: Sharp CD-MPX860H (serv.man2) Service Manual

Sharp CD-MPX880H Service Manual ▷ View online

CD-MPX880H
5 – 1
CHAPTER 5. CIRCUIT DESCRIPTION
[1] Waveforms Of CD Circuit
IC1
IC1
IC1
IC1
IC1
IC1
IC1
IC1
IC1
IC1
IC1
IC1
1
22
23
2
22
25
22
16
28
22
27
2
RFOUT
1
7
6
5
1
3
1
4
FDO
TDO
FDO
SPDO
PDOUT 1
PDOUT 0
FDO
FDO
TE
TE
16
RFOUT
2
3
4
CD-MPX880H
5 – 2
[2] Voltage
PIN PIN 
VOLTAGE
PIN 
NO
NO
NO
1
4.94 V
4.94 V
4.92 V
4.92 V
1.32 V
4.92 V
4.92 V
51
1
0
2
52
4.40 V
4.38 V
4.39 V
4.43 V
-0.92 V
-0.96 V
2
0
3
53
3
0
4
54
4
4.98
5
55
5
4.95
6
56
6
4.96
7
57
-29.05 V
-29.08 V
-23.60 V
-23.60 V
-26.20 V
-26.40 V
-26.40 V
-21.10 V
-25.12 V
-24.99 V
-24.85 V
-24.82 V
-24.87 V
-24.63 V
-24.89 V
-24.92 V
-23.01 V
-25.00 V
-24.98 V
-25.00 V
-26.40 V
-28.93 V
-23.60 V
-23.60 V
-23.60 V
-23.61 V
-20.84 V
-10.43 V
-23.50 V
-29.00 V
-26.42 V
-18.41 V
-11.10 V
-29.08 V
-29.08 V
7
4.99
8
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
0.00 V
58
8
4.96
9
4.87 V
4.87 V
4.87 V
59
9
4.96
10
60
10
4.99
11
61
11
4.96
12
62
12
4.96
13
63
13
4.96
14
64
14
4.96
15
65
15
4.96
16
66
16
4.96
17
67
17
4.99
18
68
18
4.96
19
69
19
4.96
20
70
20
4.96
21
71
21
4.96
22
4.52 V
72
22
4.98
23
4.41 V
73
23
9.95
24
4.54 V
4.05 V
4.07 V
74
24
0
25
75
26
76
27
1.87 V
77
PIN 
28
78
NO
29
79
1
53.7
30
80
2
22.7
31
4.66 V
81
3
10.7
32
0.23 V
82
4
-10.7
33
4.95 V
83
5
-22.7
PIN  VOLTAGE
34
4.95 V
84
6
-53.7
NO
35
85
7
0
1
0
36
86
8
0
2
0
37
13.15 V
13.15 V
13.15 V
87
9
0
3
0
38
88
10
0
4
2
39
89
11
0
5
2
40
90
12
-52.2
6
1.32
41
-23.60 V
91
13
52.4
7
0
42
4.72 V
92
14
0
8
0.6
43
4.41 V
4.54 V
93
15
0
9
3.48
44
94
16
-51
10
3.44
45
0.00 V
95
17
0
11
0
46
96
18
0
12
0
47
97
13
6.9
48
98
14
4.18
49
4.54 V
99
15
0
50
0.00 V
100
16
3.45
17
0.6
18
0
19
2.59
20
2
21
2
22
0
23
0
24
0
IC 901
VOLTAGE
IC101
IC 601
VOLTAGE
IC701
VOLTAGE
1
1.59
21
3.24
41
3.13
61
1.55
2
0.47
22
1.62
42
0.01
62
1.93
3
0.39
23
1.63
43
0.05
63
1.93
4
2.79
24
1.62
44
2.93
64
1.93
5
1.63
25
1.64
45
2.88
65
0.00
6
1.63
26
0.00
46
1.87
66
1.81
7
1.63
27
0.33
47
3.13
67
0.00
8
1.63
28
1.62
48
3.13
68
3.13
9
1.63
29
1.10
49
3.13
69
0.03
10
1.63
30
3.05
50
0.00
70
0.02
11
1.64
31
0.00
51
3.12
71
0.01
12
0.00
32
3.26
52
3.12
72
1.34
13
1.63
33
0.03
53
0.00
73
1.53
14
1.63
34
0.03
54
0.00
74
3.01
15
1.62
35
0.03
55
0.00
75
1.54
16
1.64
36
3.26
56
0.00
76
3.23
17
1.63
37
0.02
57
0.00
77
0.00
18
3.27
38
1.81
58
0.00
78
1.59
19
0.00
39
2.56
59
1.58
79
3.24
20
0.00
40
0.00
60
1.57
80
1.59
IC 1
PIN 
NO
VOLTAGE 
(V)
PIN 
NO
VOLTAGE 
(V)
PIN 
NO
VOLTAGE 
(V)
PIN 
NO
VOLTAGE 
(V)
1
3.43
10
3.28
19
4.51
28
7.64
2
3.50
11
1.65
20
4.50
29
7.58
3
3.44
12
1.65
21
3.45
30
0.00
4
3.48
13
1.65
22
3.10
31
0.00
5
3.44
14
1.65
23
3.10
32
0.00
6
3.49
15
1.65
24
3.09
33
0.00
7
0.00
16
1.65
25
1.65
34
0.00
8
4.20
17
1.65
26
0.02
35
3.49
9
7.63
18
1.65
27
7.64
36
3.45
E
3.26
E
4.86
E
1.81
E
0.00
C
0.10
C
3.27
C
3.26
C
3.28
B
3.23
B
4.19
B
2.33
B
0.00
IC 2
Q 1
Q 2
Q 3
Q 4
VOLTAGE 
(V)
PIN 
NO
VOLTAGE 
(V)
PIN 
NO
VOLTAGE 
(V)
PIN 
NO
VOLTAGE 
(V)
PIN 
NO
VOLTAGE 
(V)
PIN 
NO
VOLTAGE 
(V)
PIN 
NO
VOLTAGE 
(V)
PIN 
NO
VOLTAGE 
(V)
PIN 
NO
PIN 
NO
1
5.06
2
12.83
3
19.6
4
0
5
18.28
6
9.92
7
8.4
IC 851
VOLTAGE
(V)
(V)
(V)
(V)
(V)
(V)
CD-MPX880H
6 – 1
CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS LAYOUT
[1] Notes On Schematic Diagram
•
Resistor:
To differentiate the units of resistors, such symbol
as K and M are used: the symbol K means 1000
ohm and the symbol M means 1000 kohm and the
resistor without any symbol is ohm-type resistor.
Besides, the one with “Fusible” is a fuse type.
• Capacitor:
To indicate the unit of capacitor, a symbol P is used:
this symbol P means pico-farad and the unit of the
capacitor without such a symbol is microfarad. As to
electrolytic capacitor, the expression “capacitance/
withstand voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
• Schematic diagram and Wiring Side of P.W.Board
for this model are subject to change for improve-
ment without prior notice.
• The indicated voltage in each section is the one
measured by Digital Multimeter between such a
section and the chassis with no signal given.
1. In the tuner section,
    indicates AM
    indicates FM stereo
2. In the main section, a tape is being played back.
3. In the deck section, a tape is being played back.
     (  ) indicates the record state.
4. In the power section, a tape is being played back.
5. In the CD section, the CD is stopped.
•
Parts marked with “
“ (
) are impor-
tant for maintaining the safety of the set. Be sure to
replace these parts with specified ones for maintain-
ing the safety and performance of the set.
[2] Types Of Transistor And LED
REF. NO
DESCRIPTION
POSITION
JOG701
VOLUME
MAX—MIN
SW701
POWER ON /STAND-BY
ON—OFF
SW702
CD
ON—OFF
SW703
TAPE
ON—OFF
SW704
TUNER (BAND)
ON—OFF
SW705
PLAY
ON—OFF
SW706
STOP
ON—OFF
SW707
FAST REWIND/PRESET DOWN
ON—OFF
SW708
TUNING DOWN
ON—OFF
SW709
FAST FORWARD/PRESET UP
ON—OFF
SW710
OPEN/CLOSE
ON—OFF
SW711
DISC 5
ON—OFF
SW712
DISC 4
ON—OFF
SW713
DISC 3
ON—OFF
SW714
DISC 2
ON—OFF
SW715
DISC 1
ON—OFF
SW716
TUNING UP
ON—OFF
SW717
AUDIO IN
ON—OFF
REF. NO
DESCRIPTION
POSITION
KTA1504 GR
KRA107 S
KRC102 S
KRC104 S
KTA1504 Y
KTC3875 GR
B
(3)
E
(1)
C
(2)
TOP
VIEW
KDS184
TOP VIEW
TOP VIEW
KTA1271 Y
KTA1273 Y
KTA1274 Y
KIA78L05
VIEW
FRONT
E   C   B
(S)(G)(D)
(1)(2)(3)
MA111
1N4004
HSS4148
DRL204F
D10XB60F
A C
A C
VIEW
FRONT
FRONT
VIEW
SLR342VC
KTC3199 GR
KTC3200 GR
KTC3203 Y
CD-MPX880H
6 – 2
[3] Schematic Diagram
Figure 6-1: MAIN SCHEMATIC DIAGRAM (1/6)
NC
NC
NC
NC
NC
NC
A
B
C
D
E
F
G
H
1
2
3
4
5
6
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