Icom IC-M91D Service Manual Addendum page 38

• MAIN UNIT (2/2)
R621
100k
C623
33P
IC384
R637 R638
1 VIN 5
VOUT
2 GND
22 3.9
3 CTRL 4
NC
NJU7772F05
5.01V
R623
240k
S326
S328
KEY
KEY
S324 S320
S1 CLR RIGHT CH16
S322
S329
KEY KEY
S321 S325
S2 UP ENT DOWN
S333
S330
S327
KEY
S323
S3 MENU LEFT MONI
S331
S332
S4 PSW
S3V
VCC
VCC
CPU3V
BLM18RK102SN1
EP12 1.12V
IC383
1 ADJ2 10
SW2
2 MODE/DATA 9
EN2
3 VIN 8
GND
4 FB1 7
EN1
5 DEF_1 6
SW1
TPS62400DRCR
BLM18RK102SN1
10 9
EP11 8 7
6 5
4 3
2 1
J271
1.83V
LDTC144EE
Q380
1 5
2
3 4
IC372
SN74AUP1T17DCKR
LEVEL7 : 4.64V
36 35 IC220
34 33
1 VIN 5
32 31 VOUT
2 GND
30 29
3 CTRL 4
28 27 NC
26 25
NJU7772F33
24 23
22 21
20 19
18 17
16 15
14 13
12 11
10 9
8 7
6 5
4 3
2 1
J280
10 - 3
CP10
CP11 CP10S
CP12 CP10S
BOOT
JTCK 109
CP13 CP10S
JTDI 110
111
G_TXD
CP14 CP10S
112
G_RXD
113
CLOTXD
CP10S CP15
114
DTEST
115
CP10S
CLORXD 116
PON 117
T5VS 118
TXMS 119
120
121
RVS 122
RINTM 123
CD 124
125
CS
126
RESETB
127
CSHIFT
128
129
130
131
AFVCTRL 132
JTDO 133
NJRST 134
UNLK 135
DIMM 136
137
138
BOOT
139
NC_RESET
140
NC_PDN_PTT
141
ECK
EDATA 142
143
144
KTA1664
Q240
R627
0
L2SC4081
Q382
R625
220k
352mVp-p
1k
Q361
D350 R351
L1SS400 L2SA1576AS
TC7WH14FK
R449
5
47k
6
Q350
7
L2SC4081
8
1k
R361
R601
100k
R600
72
71
100k
70
69
68
67
66
65
64 PLSTB
63 DASTB
62
61
60
59 SCK
58 SDATA
57 DB1
IC360
56
DB0
55
STM32F100ZET6B EXPTTIN
54
MONI
53 PTTIN
52
51
50
49
48
47 EXTDET
46 BATTV
45 RSSIV
44 NOISEV
43
42
VER
41
BEEP
40
DSCOUT1
39
38
TEST1
37
CP361
MUTE
X360
CR-834
7.98MHz
3.30V
CPU3V
IC340
1 A0 8
VCC
2 A1 7
WP
3 A2 6
SCL
4 VSS 5
SDA
R395
4 BR24T256FJ
3
100K
2
1
IC364
*: Refer to the PARTS LIST for the value and name of component.
R606
3.3M
C525
2.2
C526
2.2
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
WR0
CD
RESETB
CS
R605
100k
S4
S3
VER
NJU7704F3
4 VOUT MR
VSS 3
CD 2
5 VDD
1
IC341