Sharp CD-C492 Service Manual page 27

C28
0.1
R44
33K
C26
0.033
R41
R42
47K
47K
C25
0 R39
27P
K 1K
4 R43
P
56K
R38 C23
470 0.0027
V
C22
220P
7
C57
GND
0.001
C35
D1
50
1SS133
D4
1N4004S
CNP12
1 2 3 4 5 6 7 8 9
10 11 12 13 14
CNSF12
TO MAIN PWB
P31 1-D
• The numbers 1 to 12
7
R57 1K
R58 1K
R59 1K
R61 1K
R62 1K
R63 1K R60
1K
C38
0.01
64 63 62 61 60 59 58 57 56 55
µ-COM
INTERFACE
0V DEF1
1
R51
0V TA1
2
3.3M
C39
0V
0.047
R50
PDO 2Kx8
3
680 RAM
0V VVSS
4
1.9V ISET
5
C40
0.047 VCO CLOCK
ERROR COERECT
R52 OSC CONTROL FLAG CONTROL
27K
4.8V
VVDD
6
0V FR
7
R53 1.2K
0V
VSS
8
2.5V
EFMO
SYNC-DETECT
9
SLICE LEVEL
EFM DEMODULATE
2.5V EFMIN
CONTROL
10
0V
TEST2
11
CLV+
0V
12
CLV
0V CLV2
DIGITAL SERVO
13
4.8V V/P
14
HLF
0V
15
SERVO
EXTERNAL
TES
0V
COMMAND
16
11
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
4.8V
4.8V
IC2
LC78622K
SERVO/SIGNAL
CONTROL
C56
0.022
CD2LD2M–
+B
IC81
TA7291S
LOADING MOTOR DRIVER
R81
3.9K
1 2 3 4 5 6 7 8 9
C82
R82
47/16 6.8K
are waveform numbers shown in page 20.
8 9
Figure 27 SCHEMATIC DIAGRAM (2/20)
54 53 52 51 50 49
EFLG
2.2V
48 C41
SBSY 12P
SUB-CODE
47 0V
C42
0V
XVSS
46
15P
XIN 2.1V
45
X-TAL
R93
XOUT 2.2V
GENERATOR 44
220
4.8V
XVDD
43
MUTER
42 4.8V
4.5V
C83
RVDD
41
0.022
RCHO
40 2.0V
0V
RVSS
4FS 39
DIGITAL
FILTER
0V
LVSS
38
LCHO
37 0V
4.5V
LVDD 36
4.8V
MUTEL
NC C43
35
330/6.3
34
0V
TEST4 33
L61
0V R55
0.82µH
150
DIGITAL
OUTPUT OUT
32
R54
330
Q51
KRC107 M
3 2 0V
0V
R80
1
6.8K
0V
+B
+B
Q91
KTA1271 Y
0V
12V
Q93
12V
KRC102 M
3 12V
2
0V R86
2.2K
1
0V
SOL
1
2
M–
3
M+
4
5
6
CD2D2NO
7
8
9
10
CNP10
10
– 27 –
CD-C492/492C
CD SERVO PWB-B
+B
XL1
CD-GND
+7.3V
+12V
Q52
CNP11
KTC3203 Y
+B
+B
R66
R64 330
22
C52
100/16
+B +7.3V
+B
BI99
1 1
2 2 CNPR11
TO MAIN PWB
3 3
P28 3-C
CNS99
SOLENOID 2
LOCK
BIM05
SENSOR PWB
SOL
1 1
GND(M)
2 2
–
M3 T/T
M–
3 3
M
UP/DOWN
M+
4 4
+ LOADING
GND(D)
5 5
SW1
OPEN CLOSE
6 6
OPEN/
DISC NO.
7
CLOSE
GND(D)
8
MECHA UP
9
SW2
GND(D)
10
MECHA UP
CNS10
SW3
1 1
DISC
2 2
NOMBER
CNS5
11
TO MAIN PWB
1
P30 1-C
2 CNSF11
3
12