Sharp MD-C2 Service Manual page 55

R57 1K
R58 1K
R59 1K
R61 1K
R62 1K
R63 1K
+B
R51
3.3M
R50
C39
680
0.047
C40
0.047
R52
27K
R53
1.2K
C56
C57 0.022
0.001
R82
1.2K
PCCL
DISC NO.
UP/DOWN
5 6 7 8 9 10 11 12 13 14 15
TO MAIN PWB(1/3)
P42 1-C,D
CNS12
• The numbers 1 to 12 are waveform numbers shown in page 64.
7
C38
0.01
0V 0V 0V 2.3V 2.3V 0V 4.7V 4.6V 4.6V 0V 0V 0V 2.5V 0V
64 63 62 61 60 59 58 57 56 55 54 53 52
MICROCOMPUTER
INTERFACE
0V DEF1
1
0V
2
TA1
0V
PDD 2K x 8
3
RAM
0V
4
VVSS
ISET
1.9V
5
VCO CLOCK
ERROR COERECT
OSC
FLAG CONTROL
CONTROL
5.0V
6 VVDD
0V FR
7
0V
8 VSS
EFMO
2.5V
9 SYNC-DETECT
SLICE LEVEL
EFM DEMODULATE
EFMIN
2.4V CONTROL
10
0V
11 TEST2
CLV+
0V
CLV
12
DIGITAL
0V CLV–
13 SERVO
V/P
5.0V
14
0V HLF
15
SERVO
EXTERNAL
0V TES COMMAND
OUTPUT
16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
5.0V
+B
R80
1K
R83 R81
1.2K 1K
Q51
KRC102 M
2 3
D93
1SS133
1
R84
2.2K
8 9
Figure 55 SCHEMATIC DIAGRAM (14/16)
+B
2.5V 0V
51 50 49
EFLG
48
NC
C41
SBSY
SUB–CODE
47
12P
NC
0V
C42
XVSS 46
15P
XIN
45
X-TAL
XOUT R93
GENERATOR 44
220
43
XVDD
5.0V
MUTER
42
5.0V
NC
4.6V C72
41
RVDD
10/50
RCHO
1.9V
40
R72
0V
39
RVSS
2.7K
4FS
1BIT
DIGITAL
FILTER
DAC 0V
R71 C71
LVSS 38
2.7K 10/50
LCHO
37
LVDD 36
R55
MUTEL
35
100
NC 5.0V
C43
0V
34 330/6.3
PCCL
0V
33
TEST4
L61
R65
0.82µH
1K
DIGITAL
OUT
C50
C51
0.022
100/16
32
IC2
LC78622NE
SERVO /
SIGNAL
CONTROL
R54 BI1/2
330
2
1
D91
1SS133
1
SOL+
2
SOL–
M–
3
M–
M+
4
M+
5
GND(D)
6
OPEN CLOSE
CD_D_NO
7
DISC NO.
8
GND(D)
9
MECHA UP
10
GND(D)
CNP10
10
– 55 –
MD-C2
+B
CD SIGNAL
R-CH
A_GND
CD_RCH
L-CH
R74 C74
D-GND
100K 220P
A_GND
+7.3V(CD)
C73
R73
+12V
220P
100K
CD_LCH
Q52
KTC3203 Y
+B
R66
220
R64
22
C52
100/16
BI1/1
2
1
CD SERVO PWB-E
SOK01
LOCK
SOLENOID
BIM05
1 1
2 2
MK01
3 3
M
UP/DOWN
4 4
LOADING MOTOR
SW1
5 5
OPEN
6 6
CLOSE
7
CD LOADING PWB-G
8
9
SW2
MECHA UP
10
CNS 10
SW3
DISC NUMBER
1 1
2 2
CNS5
11 12
1
TO MAIN
2
PWB(1/3)
3
P42 1-E
4
CNS11
5
6
TO MAIN
3
PWB(1/3)
2
P42 1-F
CNS99
1