Sharp CD-C472 Service Manual page 21

C28
0.1
R44
33K
26
033
41 R42
K
47K
25
R39
7P
1K
43
K
R38 C23
70 0.0027
C22
220P
C57
0.001
C35
1/50
D1
1SS133
D4
RL104A
P12
1 2 3 4 5 6 7 8 9
10 11 12 13 14
CNS12
TO DISPLAY PWB
P25 11-A
• The numbers 1 to 12 are waveform numbers shown in page 16.
7
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R57 1K
R61 1K
R62 1K
R63 1K
R60
C38
1K
0.01
+B
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50
U-COM
INTERFACE
0V DEF1
1
0V TA1
2
R51
3.3M 0V
PDO
3 2KX8
RAM
C39
R50
0V
680
0.047 VVSS
4
1.9V
ISET
5
C40
0.047
VCO CLOCK
ERROR COERECT
OSC CONTROL FLAG CONTROL
R52
27K
VVDD
4.8V
6
R53
0V FR
7
1.2K
0V VSS
8
SYNC-DETECT
2.5V EFMO
9 EFM DEMODULATE
SLICE LEVEL
2.5V EFMIN
CONTROL
10
IC2
0V TEST2
11
LC78623D
0V CLV+
12
SERVO/SIGNAL
CLV
CLV–
0V
DIGITAL SERVO
13
CONTROL
4.8V V/P
14
0V HLF
15
EXTERNAL
SERVO
0V TES OUTPUT
COMMAND
16
10
17 18 19 20 21 22 23 24 25 26 27
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 21 SCHEMATIC DIAGRAM (2/10)
CD-C472/C3400/C3400C/C3800/C3800C
49
EFLG
48
2.2V
SBSY
SUB-CODE
47
0V
0V
XVSS
46
XIN 2.1V
45
X-TAL
2.2V R93
XOUT
44
GENERATOR
220
XVDD
43
4.8V
MUTER
4.8V
42
R72
4.5V
RVDD
41
2.7K
2V
RCHO
40
4FS R74
1BIT RVSS 0V C72
39
390
10/50
DIGITAL DAC
R71
0V
R73
LVSS
38
2.7K
FILTER
390
2V
LCHO
37
LVDD 4.5V
36
C71
MUTEL 4.9V
10/50
4.8V
35 +B
0V
NC
34
33
TEST4
R55
L61
0V
150
0.82µH
DIGITAL
OUT
C51
C50
100/16
0.022
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 SOL
2 GND(M)
M–
3
M+
4
GND(D)
5
6 OPEN/CLOSE
DISC NO.
7
GND(D)
8
UP/DOWN
9
GND(D)
10
CNP10
CD SERVO PWB-C
10
– 21 –
R-CH
1
A_GND
CD_RCH 2
L-CH
3
D-GND
CNS11
4
A_GND
+B
7.3V TO MAIN PWB
5
P22 2-A
M_12V
6
CD_LCH
+B
CNP11
Q52
KTC3203 Y
6.5V
R66
5.5V 220
R64
C75
22
0.001
SOLM2
SOLENOID
LOCK
BIM5
1 6
M3 T/T
2 5
– UP/DOWN
3 4
M LOADING
3
4
+
SW1
5 2
OPEN
6 1
CLOSE
7
SENSOR
8
9
PWB-F
10
CNS10
SW2
MECHA UP
1 1
SW3
2 2
DISC NUMBER
CNS5
11 12