Icom IC-M73 Service Manual page 32

• MAIN UNIT (1/2)
PCON
R192
MODCO
390
IC190
1 VIN2 18
VIN7
2 VDD 17
GND
3 LD 16
DAST
RESET
4 CLK 15
SCLK
VDAREF2
5 DI 14
SDATAO
VDAREF1
6 VIN3 13
VIN6
R2A20178
R160
FCON
10k
TX EXT :4.91V
TX INT :0.00V
RX :0.00V
LDTA114EE
EXPTT
Q430
MC250
EM6027P
Q250
LDTC144EE
PTTM
TX EXT :0.00V IC430
TX INT :4.99V 1 I/O1 14
VDD
2 O/I1 13
RX :0.00V
CONT1
3 O/I2 12
CONT4
4 I/O2 11
I/O4
5 CONT2 10
VOXM
O/I4
MICMS 6 CONT3 9
O/I3
7 VSS 8
I/O3
CD4066BPWR
DETMS
0.018
39k
C434 0.018
R440 C435
2 IC431
1
3
LM2904PWR
22K
R437
DA2S10100L
D430 R435
VOXT
1.8K
IC431 6
7
5
LM2904PWR
IC260
C280 R286
VOLOUT 1 COM 8
VCC
2 INH 7
1
10k CH0
3 VEE 6
CH1
4 GND 5
R288 R289
A
BEEP
TC7W53FK
150k 100k
BPCTRL INT SP : 4.99V
EXT SP : 0.00V
Q470
LDTC144EE
SPCTRL
1.86V
R562 R563
10k 4.7k
LM2904PWR
IC432
6
7
5
1.86V
C258
68P
R253 R255 4.7k
C254
0.22 4.7k 470k
R258
6
7
18k
5
R256
LM2902PWR
IC200
R276
C263
390k 0.01
R263
100K
2
R279
1
100k
3
1.5k
R277 IC432
LM2904PWR
R271 R272
C265
100k 120k 82P
R273
47k
C511 R546 R547 R549 C440
0.1 4.7
10k 4.7k 0
9
8
C510
10
IC200
0.1
LM2902PWR
R545
10k
0.01 2.2k R203 R207 R377 R378 0.0047
C450
470k R201 390k 27k 82k 82k
IC200
13
R454
14
R379
100k
12
82k
R202
LM2902PWR
R376 R206
C202
0.1
100k 18k
. 1 8 6 V
INT SP : 5.17V
6.8k
EXT SP : 7.40V
R280
AFV
10
J251
IC401
C403
1 OUT_A 8
2 -IN_A
2 VCC 7
1 +IN_A
3 OUT_B 6
+IN_B
4 GND 5
-IN_B
NJM2073M
IC280
1 10
NC POUT
2 9
VCC PWGND
3 8
NC PREGND
C401
4 7
VIN PHASE
5 6
1 RIPPLE NF
TA7368PL
IC200
LM2902PWR
4 8
V+ V+ IC432 8
GND GND
LM2904PWR V+ IC431
11 4 GND
LM2904PWR
4
NOISV
NOISV1
*IC504
1 8
2 7
DETMS1 3 6
4 5
PLAYMS
270k
BEEP
R274
C267
VOLIN
0.22
R542
WDECV
0
FCON
*C534
NCSCK
R212 R213 0.1
MOD
C378 C207
1.5k 120k
LM2902PWR NCSDATA
2
1
3
IC200
*C528
*C527
6.8k
ATISO
R300
. 1 8 2 V
RSQ035P03TR
Q230
56k
R230
Q231
KTC811U
Q401
LDTC144EE
INT SP : 0.00V
EXT SP : 4.99V
*C558
*R553 *R552
*C536
*C537
*C531
*IC501
1 CS 8
VCC
2 SO(SOI) 7
HOLD
3 WP 6
SCK
4 GND 5
SI(SIO)
*R555
*Q550
*: Refer to the PARTS LIST for the value and name of component.
10 - 2
1.45V
*IC503
*L12
5 VOUT 1
VIN 2
VSS 3
4 NC
CD
3.28V
*IC502
*L11
5 VOUT 1
VIN 2
VSS 3
4 NC
CE
*R551
*R550
*C529
*C520
*C530