Sharp CD-C452 Service Manual - Page 15

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Sharp CD-C452 Service Manual
C28
0.1
R44
33K
6
33
R42
47K
5
R39
P
1K
38
C23
0
0.0027
C22
220P
C57
0.001
C35
1/50
D1
1SS133
D4
RL104A
12
1 2 3 4 5
6 7 8 9
10
11 12 13
14
CNS12
TO DISPLAY PWB
P19 11-A
7
R57 1K
R61 1K
R62 1K
R63 1K
R60
C38
1K
0.01
+B
64 63 62
60
59 58 57
56
55 54 53 52 51 50
61
U-COM
0V
DEF1
INTERFACE
1
0V
TA1
2
R51
0V
3.3M
PDO
2KX8
3
C39
RAM
R50
0V
680
0.047
VVSS
4
1.9V
ISET
5
C40
0.047
VCO CLOCK
ERROR COERECT
OSC CONTROL
R52
FLAG CONTROL
27K
4.8V
VVDD
6
R53
0V
FR
7
1.2K
VSS
0V
8
SYNC-DETECT
2.5V
EFMO
9
EFM DEMODULATE
SLICE LEVEL
2.5V
EFMIN
CONTROL
10
IC2
TEST2
0V
11
LC78623D
0V
CLV+
12
SERVO/SIGNAL
CLV
0V
CLV–
DIGITAL SERVO
13
CONTROL
V/P
4.8V
14
0V
HLF
15
EXTERNAL
SERVO
0V
TES
OUTPUT
COMMAND
16
11
17
18
19
20
21
22
23
24
25
26
4.8V
+B
C56
0.022
CD_LD_M+
+B
IC81
TA7291S
LOADING MOTOR DRIVER
1 2 3 4 5 6 7 8 9
R81
2.7K
R83
R82
3.9
C82
3.3K
47/16
R85
56
(1/2W)
CD SIGNAL
8
9
Figure 15 SCHEMATIC DIAGRAM (2/10)
49
EFLG
48
2.2V
SUB-CODE
SBSY
47
0V
0V
XVSS
46
2.1V
XIN
45
X-TAL
2.2V
R93
XOUT
GENERATOR
44
220
XVDD
43
4.8V
MUTER
4.8V
42
R72
4.5V
RVDD
41
2.7K
RCHO
2V
40
4FS
R74
0V
C72
1BIT
RVSS
39
390
10/50
DAC
DIGITAL
0V
R71
R73
LVSS
38
2.7K
FILTER
390
2V
LCHO
37
4.5V
LVDD
36
C71
MUTEL
10/50
35
4.8V
+B
0V
NC
34
33
TEST4
R55
L61
0V
150
0.82µH
DIGITAL
OUT
C51
C50
100/16
0.022
27
28
29
30
31
32
+B
+B
+B
Q91
KTA1271 Y
0V
12V
Q93
KRC102 M
12V
R87
12V
10K
0V
3
2
R86
D91
0V
1
2.2K
1SS133
1
2
3
4
5
6
7
8
9
10
CNP10
CD SERVO PWB-C
10
– 15 –
CD-C452/C452C
CD SECTION
R-CH
1
A_GND
2
CD_RCH
L-CH
3
D-GND
4
A_GND
+B
7.3V
5
M_12V
6
CD_LCH
+B
CNP11
Q52
4.9V
KTC3203 Y
6.5V
R66
5.5V
220
R64
C75
22
0.001
SOLM2
SOLENOID
LOCK
BIM5
SOL
1
6
M3 T/T
GND(M)
2
5
+
UP/DOWN
M+
3
4
M
LOADING
M–
4
3
–
SW1
GND(D)
5
2
OPEN
OPEN/CLOSE
1
6
CLOSE
DISC NO.
7
SENSOR
GND(D)
8
UP/DOWN
9
PWB-F
GND(D)
10
CNS10
SW2
MECHA UP
1
1
SW3
2
2
DISC NUMBER
CNS5
11
CNS11
TO MAIN PWB
P16 2-A
12