Sharp MD-MT180 Service Manual page 30

MD-MT180
SUB PWB-B
A
C2
0.1
1413121110 9 8
10K
1 2 3 4 5 6 7
B
CK14
CK16
C
D
E
F
RCAULT
MCPGIN
INPGIN
INPGCK
TP416
TP417
OPICGA
PBMUTE
PBAULT
LDON
DISC
SGAIN
G
H
• NOTES ON SCHEMATIC DIAGRAM can be found on page 26.
1
D2
1SS385
C3
0.1
D1
CK13A
1SS385
8 7 6 5
R1
1 2 3 4
R2
10K
C1
100P
(CH)
CKG
CK13 CKV
25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
SYD3
26
SYD4
27
SYD5
28
SYD6
29
SYD7
30
SYD0
VSS 23 1 CIN
31
RCLAT
32 2
24 SYD1 SPIN
MCPGI
33
25 3 RFPCNT
SYD2
INPGI
34
IC401
INPGCK
35
RCPCNT
36 IX0484AW
TEST1
37
TEST0 SYSTEM
38
JPNP
39
MICROCOMPUTER
VCC
40
OPICGA
41
PBOPON
42
48 RADAT 78 Vref
PBLAT
43
49 VSS AVCC
77
LDON
44
DISCP 50 DLBHP ARQK
45 76
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
2 3
Figure 30 SCHEMATIC DIAGRAM (3/4)
MAIN PWB VERSION
+B
INPGCK
INPGIN
MCPGIN
R754
150K
C758
TP412
1
12 11 10 9
BIAS AMPuGAIN SEL.
LOGIC AMPuGAIN SEL.
13 14 15 16 17 18 19 20 21 22 23 24
TP772
4
3
2
1
PCNT1
PCNT1
100
TP406 PCNT2
PCNT2 99
R406
VCC
98
10K
EJSW
97
CK405
CKSTP
96
R405 XRT
XRST
95
10K FOK
FOK
94
SENSE
SENSE
93
DCNT1
92
PLVON
PLVON
91
MCMON
TP415
90
CHGON
CHGON
89
TP401
VSS
88
AVSS
87
C401 LDVAR
LDVAR
86
CHGCNT
0.1
CHGCNT
85
HKEY2
HKEY2
84
HKEY1
HKEY1
83
RKEY
82
TEMP
TEMP
81
C130
CHIMON
80
0.1
PLVBAT
79
PLVBAT
78
77
76
TP402
+B
DINT
4
– 30 –
B
MAIN PWB-A
+B
R720 R712
6.8K 6.8K
R719
R711
6.8K
6.8K
12 11 10 9 8 7 6 5 4 3 2 1
LI
RI
DGND VCC
13 14 15 16 17 18 19 20 21 22 23 24
R703
100K
R702
22
C702
10/6.3
C762
2.2
C754
1
8 7 6 5 4 3 2 1
RLPFO
RHPVEE
LHPVEE
LLPFO
R767
4.7
L-CH
R-CH
R765
15
R768
4.7
C753
1
C765 C766
0.22 0.22
5
C
,
6