DOWNLOAD Sharp CD-BA250 (serv.man10) Service Manual ↓ Size: 3.93 MB | Pages: 64 in PDF or view online for FREE

Model
CD-BA250 (serv.man10)
Pages
64
Size
3.93 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System
File
cd-ba250-sm10.pdf
Date
PREV: Sharp CD-BA250 (serv.man9) Service Manual

Sharp CD-BA250 (serv.man10) Service Manual ▷ View online

– 37 –
CD-BA250H/CD-BA2600H
Figure 37 WIRING SIDE OF P.W.BOARD (7/7)
7
8
9
10
11
12
CD LOADING MOTOR
PWB-E
1
6
1
2
3
4
5
6
BI4
M3
T/T UP/DOWN
LOADING MOTOR
RD
WH
BK
WH
BK
WH
–
+
SW3
DISC
NUMBER
SW2
CLAMP
SW1
OPEN/
CLOSE
B R
COLOR  TABLE
R D ( R )
O R
Y L
G R
B L
V L
G Y
W H ( W )
B K
P K
BROWN
RED
ORANGE
YELLOW
GREEN
BLUE
VIOLET
GRAY
WHITE
BLACK
PINK
CNS4
TAPE
MOTOR
-
+
1
1
2
3
2
4
5
6
7
8
1
8
CNS703
SOLENOID
PH
SW
SW
SW
SOLENOID
TAPE MECHANISM PWB-D
TAPE MECHANISM
ASSEMBLY
P34  4-G
TO DISPLAY PWB
CNP101
P33  11-E
TO MAIN PWB
P33  11-D
TO MAIN PWB
CNP102
TAPE 1
PLAYBACK HEAD
TAPE 2
 ERASE HEAD
RECORD/PLAYBACK
HEAD
FFC702
BL
WH
YL
BK
PK
WH
BK
BK
BK
PK
WH
WH
WH
PK
BK
7 6 5 4 3 2 1
GR
GR
GR
2
3
1
BL
YL
WH
PK
CD-BA250H/CD-BA2600H
– 38 –
VOLTAGE
1.6 V
1.0 V
1.6 V
1.8 V
3.3 V
0 V
1.6 V
1.6 V
1.6 V
1.6 V
1.6 V
1.6 V
1.5 V
1.5 V
1.5 V
1.5 V
0.8 V
3.2 V
0 V
1.6 V
1.6 V
1.6 V
1.6 V
0 V
0 V
3.2 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
1.6 V
0 V
0 V
3.2 V
3.2 V
0 V
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. VOLTAGE
IC1
3.7 V
3.7 V
0 V
0 V
3.7 V
3.2 V
3.2 V
3.2 V
0 V
0 V
0 V
3.2 V
0 V
0 V
0 V
0 V
0 V
3.2 V
0 V
0 V
0 V
4.7 V
0 V
4.9 V
4.9 V
4.9 V
0 V
4.9 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
3.2 V
3.2 V
3.2 V
0 V
3.2 V
PIN
NO. VOLTAGE
41
54
53
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
52
51
50
49
48
47
46
45
44
43
42
75
74
76
77
78
79
80
73
72
71
4.77 V
4.68 V
0 V
0 V
4.67 V
4.72 V
4.74 V
0 V
5.41 V
4.86 V
2.3 V
2 V
0 V
4.76 V
0 V
4.77 V
4.7 V
0 V
5.36 V
0.16 V
0 V
0 V
0 V
0 V
0 V
2.3 V
0.22 V
0 V
0 V
0 V
5.03 V
5.03 V
5.03 V
4.77 V
5.04 V
2.48 V
0 V
0 V
4.92 V
0 V
5.67 V
12.5 V
12.52 V
12.5 V
3.8 V
4.78 V
4.76 V
4.5 V
5.04 V
5.28 V
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. VOLTAGE
IC701
5.28 V
0 V
0 V
5.25 V
5.28 V
5.28 V
0 V
0.31 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
–28.82 V
–28.82 V
–28.8 V
–28.88 V
–28.79 V
–28.8 V
–16.2 V
–18.74 V
–26.3 V
–23.77 V
0 V
–21.2 V
–28.9 V
–26.2 V
–26.3 V
–26.3 V
–21.26 V
–28.83 V
0 V
0 V
–18.73 V
0 V
0 V
–26.26 V
–26.26 V
–26.24 V
–26.32 V
–26.3 V
–26.29 V
–26.3 V
–26.3 V
–26.3 V
–26.28 V
–26.3 V
PIN
NO. VOLTAGE
51
64
63
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
62
61
60
59
58
57
56
55
54
53
52
85
84
86
87
88
89
90
83
82
81
50
49
48
47
46
45
44
43
42
41
95
94
96
97
98
99
100
93
92
91
1.7 V
1.7 V
1.8 V
2.1 V
2.1 V
2.1 V
2.0 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
2.1 V
2.1 V
1.6 V
4.9 V
3.0 V
1.6 V
0 V
0 V
4.9 V
4.9 V
1.6 V
2.1 V
2.1 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
0 V
4.2 V
0 V
2.1 V
2.1 V
4.9 V
3.7 V
3.7 V
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
42
41
37
36
35
34
33
32
31
PIN
NO. VOLTAGE
IC2
0 V
0 V
0 V
5.03 V
5.00 V
5.01 V
5.01 V
5.03 V
5.01 V
5.01 V
5.01 V
5.01 V
5.01 V
5.01 V
5.01 V
5.01 V
5.03 V
5.01 V
5.01 V
5.00 V
5.04 V
5.03 V
10.03 V
0 V
9
8
7
6
5
4
3
2
1
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
PIN
NO. VOLTAGE
IC601
0 V
0 V
0.57 V
2.0 V
0.59 V(AC)
1.32 V
0 V
0.59 V
3.45 V
3.42 V
0 V
0 V
6.92 V
4.13 V
0 V
3.43 V
0.59 V
0 V
2.63 V
0.56 V(AC)
2.00 V
0.57 V
0 V
0 V
9
8
7
6
5
4
3
2
1
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
PIN
NO. VOLTAGE
IC101
2.09 V
5.17 V
2.09 V
2.08 V
0 V
5.15 V
5.15 V
3.02 V
5.17 V
4.35 V
4.01 V
4.01 V
4.10 V
1.18 V
1.19 V
2.08 V
1.79 V
1.79 V
0 V
0.58 V
2.60 V
2.96 V
5.17 V
3.64 V
9
8
7
6
5
4
3
2
1
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
PIN
NO. VOLTAGE
IC303
2.55 V
0 V
0 V
0 V
0 V
5.16 V
0 V
4.69 V
4.02 V
4.10 V
5.15 V
0 V
5.15 V
0 V
0 V
2.53 V
5.16 V
0.90 V
0.90 V
1.31 V
0 V
2.55 V
9
8
7
6
5
4
3
2
1
22
21
20
19
18
17
16
15
14
13
12
11
10
PIN
NO. VOLTAGE
IC302
0 V
0 V
0 V
50.1 V
–48.8 V
0 V
0 V
51.6 V
–51.5 V
0 V
0 V
–50.1 V
0 V
0 V
0 V
9
8
7
6
5
4
3
2
1
15
14
13
12
11
10
PIN
NO. VOLTAGE
IC901
2.58 V
2.58 V
5.16 V
0 V
2.58 V
2.58 V
0 V
2.62 V
2.48 V
0 V
5.16
5.16 V
0 V
0 V
4.76 V
0 V
9
8
7
6
5
4
3
2
1
15
14
15
13
12
11
10
PIN
NO. VOLTAGE
ICT1
0.17 V
0.2 V
0.19 V
–13.11 V
0.19 V
0.2 V
0.17 V
6.23 V
8
7
6
5
4
3
2
1
PIN
NO. VOLTAGE
IC561
3
2
1
PIN
NO. VOLTAGE
IC902
12.56 V
24.75 V
13.17 V
3
2
1
PIN
NO. VOLTAGE
IC903
24.70 V
0 V
10.04 V
3
2
1
PIN
NO. VOLTAGE
IC904
12.21 V
0.66 V
5.68 V
8
9
7
6
5
4
3
2
1
PIN
NO. VOLTAGE
IC301
0.91 V
1.64 V
5.40 V
1.62 V
0 V
5.41 V
4.65 V
5.37 V
5.41 V
0.25 V
0.3 V
0.3 V
–13.11 V
0 V
0 V
0 V
6.23 V
8
7
6
5
4
3
2
1
PIN
NO. VOLTAGE
IC562
– 39 –
CD-BA250H/CD-BA2600H
•
 The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chas-
sis 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 “ 
1 
” (                          ) are important for
maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.
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 improvement without prior
notice.
REF. NO
DESCRIPTION
POSITION
POSITION
SW716
EQUALIZER
ON—OFF
SW717
VOLUME UP
ON—OFF
SW718
VOLUME DOWN
ON—OFF
SW720
CD
ON—OFF
SW721
TAPE
ON—OFF
SW722
TUNING DOWN
ON—OFF
SW723
MEMORY/SET
ON—OFF
SW724
FAST REWIND
ON—OFF
SW725
FAST FORWARD
ON—OFF
SW726
PLAY
ON—OFF
SW727
STOP
ON—OFF
SW729
REC/PAUSE
ON—OFF
SW730
TUNING UP
ON—OFF
SW731
VIDEO
ON—OFF
SW732
TUNER
ON—OFF
REF. NO
DESCRIPTION
SW1
OPEN/CLOSE
ON—OFF
SW2
CLAMP
ON—OFF
SW3
DISC NUMBER
ON—OFF
SW4
PICKUP IN
ON—OFF
SW701
ON/STAND-BY
ON—OFF
SW702
CLOCK
ON—OFF
SW703
TIMER
ON—OFF
SW704
RTY
ON—OFF
SW705
EON
ON—OFF
SW706
ASPM
ON—OFF
SW707
DISPLAY MODE
ON—OFF
SW712
DISC SKIP
ON—OFF
SW713
OPEN/CLOSE
ON—OFF
SW714
DIMMER
ON—OFF
SW715
X-BASS
ON—OFF
TYPES OF TRANSISTOR AND LED
(1)  (2) (3) 
(S) (G) (D) 
E   C    B 
FRONT
VIEW
KTA1266  GR
KRC102  M
KRC104  M
KTA1271 Y
KTA1274 Y
2SC1845 F
2SC380 O
KTA1273  Y
KTC3203  Y
KTC3199  GR
KRA107 M
KRC107 M
SLR342VCJ1
FRONT
VIEW
CD-BA250H/CD-BA2600H
– 40 –
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
Main  :        5 K
Zoom  :     100
Mode  :   AUTO
Type   :   EDGE CH3
Delay  :                    0.0 ns
Hold off  :                0.2 
µ
s
CH3  :        0.00 V
CH4  :        0.00 V
BW   : FULL
=Trigger=
=Filter=
=Offset=
CH3
  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
Main  :         1 K
Zoom  :      100
Mode  :   NORMAL
Type   :   EDGE CH1
Delay  :               2.887 ms
Hold off  :                0.2 
µ
s
CH3  :        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
Main  :      100 K
Zoom  :         2 K
Mode  :   AUTO
Type   :   EDGE CH2
Delay  :                    0.0 ns
Hold off  :                0.2 
µ
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
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
Main  :      100 K
Zoom  :         2 K
Mode  :   NORMAL
Type   :   EDGE CH2
Delay  :               2.924 ms
Hold off  :                0.2 
µ
s
CH3  :        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
Main  :      100 K
Zoom  :         2 K
Mode  :   NORMAL
Type   :   EDGE CH1
Delay  :               2.924 ms
Hold off  :                0.2 
µ
s
CH3  :         0.00 V
CH4  :         0.00 V
BW   : FULL
=Trigger=
=Filter=
=Offset=
3
IC1  67
4
IC1  15
Vp-p=1.0V~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
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
Main  :      100 K
Zoom  :         2 K
Mode  :   AUTO
Type   :   EDGE CH1
Delay  :                   0.0 ns
Hold off  :                0.2 
µ
s
CH3  :        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
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
Main  :      100 K
Zoom  :         2 K
Mode  :   AUTO
Type   :   EDGE CH1
Delay  :                   0.0 ns
Hold off  :                0.2 
µ
s
CH3  :      0.000 V
CH4  :        0.00 V
BW   : FULL
=Trigger=
=Filter=
=Offset=
CH1
  v/DIV
  500 mV
1
IC1  21
2
IC1  20
WAVEFORMS OF CD CIRCUIT
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