Voltage Diagram; Main Unit - Icom IC-M2A Service Manual

SECTION 11

VOLTAGE DIAGRAM

11-1 MAIN UNIT

5V
DET
C261
R201
0.1
15 k 1.2 M
5V
C202
1.9 V
R251 R260 R261
3.9 k
470 12 k
R263
C251 C260
R262 100 k
10 10 1.8 k
R256 R202
Q250 18 k 100 k
UN911H
5V
PTT
C376
0.1
C250 R250 R375 C257 C200
0.01 100 k 4.7 k 0.01
0.01
C254 R253
2.2 k
0.01
MIC
CP250
DETO 1 8 5V
MC250
C262
DETIN 2 7 DETM
MICM 3 6 MICO 0.01
4 5 MICIN
C252
R252
IC260
0.001
33 k
TC4W66F
PTTSW
S250
R264
R265
100 k 100 k
CP253 CP255
CLONE CLONE
SPO SPO
AFOUT AFOUT
MIC MIC
CP252
GND GND
J250
R301
HSJ1594-010050
CP254 CP251
10 k
C300
0.0033
R303
10 k
SPO SPO
1
GND R305
2
J251 10 k
BM02B-ASRS-TF
R307
10 k
S320 S323
UP
CHWX
R309
10 k
S324 S325
S321
R311
DOWN SQL DW
10 k
R313
S327 S326 10 k
S322
HL
16CH SCAN
R315
20 k
MOD
VOLIN
R207
R203
BEPST
27 k
R379
R377 R378
82 k 82 k 82 k
BEPO
R206
0.1 18 k
C377 VOLO
C378 C207
AFV
820 P 0.0047
0.1
R213
R212
68 k
1.5 k
R204 C205 R214 C206
R205 R376
15 k
27 k 4.7 k 100 k 0.018 0.001
IC280
TA7368F
1
NC
2
R277
VCC
3
100 k NC
4
VIN
5
RIPPLE
1 14
R274
2 13
390 k
3 12
R276 C263
4 11
180 k 0.01
5 10
6 9
7 8
R275
C379
IC200 10 k
56 P
NJM2902V
C267
R279 R288
0.22
1.5 k 220 k
VOLIN BEPST
R255
C280
150 k R271
R272
0.47
56 k 120 k
WXTV
Q280
C265
R281 2SC4213 B
150 P
R273 33 k
22 k
R258
4.7 k
R257 C264 C266 R282 C281
R278
4.7 k 0.47
0.0056 1 k 0.027 10 k
MICM
DETM
C350 CP350 CP351 CP352
0.01
AFOUT
CLONE
R350
R300
470 k
20 k CP353 CP354 CP355
ATIS8
R302
R346
20 k 10
ATIS7
CPU5V
R304
20 k
ATIS6
R352 CPU5V
R306
D350
15 k
20 k
DA204U
ATIS5
R308
20 k
C340
ATIS4
0.01
IC340
R353
R310 HN58X2416TI
1 k
20 k
ATIS3 Q350 1 8
A0 VCC
2 7
DTC144TU
A1 WP
3 6
R312
R351 A2 SCL
4 5
20 k VSS
SDA
ATIS2 1 k
R314
20 k
ATIS1 C351 C352
47 P 47 P
11 - 1
RSSIV
NOISV
BEEP
C282 C283 C284
10 0.1 0.001
10
POUT
9
PWGND
8
PREGND
7
PHASE
6
NF
R283
33
R284
10
CPU5V
C289 C288 C286 C287
C360
150 P
220 0.047 10
0.01
R289
150 k
R286
10 k
SEG18 76
P91/SEG34
SEG19 77
C285 P92/SEG35
SEG20 78
0.1 P93/SEG36
SEG21 79
P94/SEG37/M
SEG22 80
P95/SEG38/DO
SEG23 81
P96/SEG39/CL2
82
AFOUT P97/SEG40/CL1
5VS 83
P40/SCK32
MICM 84
P41/RXD32
DETM 85
P42/TXD32
WET 86
P43/IRQ0
CPU5V 87
AVCC
WXTV 88
PBO/AN0
89
PB1/AN1
NOISV 90
PB2/AN2
BATTV 91
PB3/AN3
TDETV 92
PB4/AN4
TEMPV
TEMPV 93
PB5/AN5
RSSIV 94
PB6/AN6
PTT PTT 95
PB7/AN7
96
PC0/AN8
97
PC1/AN9
98
PC2/AN10
99
PC3/AN11
100
AVSS
C361 C363 C364 C365 C366 C367 C368
0.047 0.047 0.047 0.047 0.047 0.033 0.047
R345
470 k
BEEP
CPU5V CPU5V
CP360
TDEC
R360 1 k
UNLK
RESET
R340 R341
10 k 10 k BTYPE
R343 CHEXT
10 k
IC341
CP361
S-80942ANMP-DD6
1 5
OUT
CD
2
VDD
3 4
VSS NC
R361 1 k
C342
C341 SCK
100
0.027
R362 1 k
PLST
R363 1 k
SDATA
R364 1 k
DAST
CLIN
5V
DET
MOD
RSSIV
VOLIN
BEPST
NOISV
BEPO
BEEP
VOLO
AFV
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
COM1
COM2
COM3
50
P57/WKP7/SEG8
49
P56/WKP6/SEG7
48
P55/WKP5/SEG6
47
P54/WKP4/SEG5
46
P53/WKP3/SEG4
45
P52/WKP2/SEG3
44
P51/WKP1/SEG2
43
P50/WKP0/SEG1
42
PA0/COM1
41
PA1/COM2
40
PA2/COM3
IC360
39
PA3/COM4
38 CPU5V
HD6433844RA60H
VCC
37
V0
36
V1
35
V2
34
V3
33
VSS
CPU5V
32
CVCC
31
P37/AEVL
30 IVOLM
P36/AEVH
29 CLOUT
P35/TXD31
28 CLIN
P34/RXD31
27 AFVS
P33/SCK31
26 R5VS
P32/RESO
C372
0.1
X360
CR-610
R371
100 k
R365 1 M
C373
0.1
C370 C371
LCDC2 22 P
18 P
LCDC1
7.9872 MHz
SCK
3.4 Vp-p
R366 220 k
PLST
R367 120 k
SDATA
DAST
CLIN
5V
DET
MOD
RSSIV
VOLIN 5V
BEPST
NOISV
BEPO
BEEP TEMPV
VOLO
AFV
C191
0.01
F
DS360
A0153A
1
SEG1
2
SEG2
3
SEG3
4
SEG4
5
SEG5
6
SEG6
PLST
7
SEG7
SCK
8
SEG8
SDATA
9
SEG9
10
SEG10
11 UNLK
SEG11
12
SEG12
13
SEG13
14
SEG14
15
SEG15
16
SEG16
17
SEG17
18
SEG18
19
SEG19
20
SEG20
21
SEG21
22
SEG22
PCON
23
SEG23
MODC
24
COM1
25
COM2
26
COM3
ATIS8
ATIS7
ATIS6
ATIS5
ATIS4
ATIS3
ATIS2
ATIS1
DET
MOD
R374
RSSIV
68 k VOLIN
BEPST
NOISV
R373
100 k
R372
100 k
C374 C375
0.1 0.1
R192
390
R194
C192
100 k
10
BEPO
BEEP
VOLO
AFV
CPU5V