Sharp MD-MT180 Service Manual page 31

D2
1SS385
C2
0.1
D1
1SS385
1413121110 9 8
R1
10K
1 2 3 4 5 6 7
R2
10K
25 24 23
SYD3
26
SYD4
27
SYD5
28
SYD6
29
SYD7
30
VSS
31
RCAULT
RCLAT
32
MCPGIN
MCPGI
33
INPGIN
INPGI
34
INPGCK
INPGCK
35
RCPCNT
36
TP416 TEST1
37
TEST0
TP417 38
JPNP
39
VCC
40
OPICGA
OPICGA
41
PBMUTE
PBOPON
42
PBAULT
PBLAT
43
LDON
LDON
44
DISC
DISCP
45
SGAIN
SGAIN
46
RACLK
47
48
49
50
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75
+B
7
8
C3
0.1
8 7 6 5
1 2 3 4
C1
100P
(CH)
+B
9 8 7 6 5 4 3 2 1
22 21 20 19 18 17 16 15 14 13 12 11 10
PCNT1
100
PCNT2 99
VCC
98
EJSW
97
CKSTP
96
SYD0 1 CIN XRST
23
95
FOK
24 SYD1 2 SPIN 94
SENSE
93
25 3 RFPCNT
SYD2
DCNT1
92
IC401
PLVON
91
MCMON
90
IX0484AW
CHGON
89
SYSTEM VSS
88
AVSS
87
MICROCOMPUTER
LDVAR
86
CHGCNT
85
HKEY2
84
48 RADAT Vref
78
HKEY1
83
VSS AVCC
49 77
RKEY
82
50 DLBHP ARQK TEMP
76 81
CHIMON
80
PLVBAT
79
78
77
76
TP402
9
Figure 31 SCHEMATIC DIAGRAM (4/4)
– 31 –
MAIN PWB VERSION
+B
INPGCK
INPGIN
MCPGIN
C762
2.2
R754
150K C758
TP412
1
C754
12 11 10 9 8 7 6 5 4 3 2 1
RLPFO
RHPVEE
BIAS AMPuGAIN SEL.
LOGIC AMPuGAIN SEL.
LHPVEE
LLPFO
13 14 15 16 17 18 19 20 21 22 23 24
R765
TP772
C753
1
4
3
2
1
PCNT1
PCNT2
TP406
R406
10K
CK405
R405 XRT
10K
FOK
SENSE
PLVON
TP415
CHGON
TP401
C401 LDVAR
CHGCNT
0.1
HKEY2
HKEY1
TEMP
C130
0.1
PLVBAT
+B
DINT
10 11
MD-MT180
X
MAIN PWB-A
R720 R712
6.8K 6.8K
R719
R711
6.8K
6.8K
12 11 10 9 8 7 6 5 4 3 2 1
RI LI
DGND VCC
13 14 15 16 17 18 19 20 21 22 23 24
R703
100K
R702
22
C702
10/6.3
1
R767
4.7
L-CH
R-CH
15
R768
4.7
C765 C766
0.22 0.22
12