Icom IC-A220T Service Manual

August 2015
(Amended page)
27
VOLTAGE DIAGRAM
*Refer to “PARTS LIST.”
4.90V
0.06V
15.93V
4.92V
3.16V
10.33V
4.92V
LED ON : 4.88V
LED OFF: 0.00V
LED ON : 4.88V
LED OFF: 0.00V
LED ON : 4.83V
LED OFF: 0.00V
V
1.94V
VCC : 13.80 V
Freq. : 127.05 MHz
Description :
COMMON
RX
TX
1kR138
0.01 C59
22k R63
J3
1 2
3 4 5 6
78
0.01
C21
0.01
C43
22k R61
4.7k
R127
1k
R135
0.027
C30
10kR14
33k
R69
0.01C53
1k
R132
SHORTLAND
CP2
10k
R26
3.3 10V F93 M A
C44
390
R47
0.01C47
0.001
C80
0.01C20
100kR102
33kR67
SHORTLAND
CP3
CP10SCP14
47k
R34
0.01
C76
2.2M
R74
SML-512MW
DS7
100kR98
1kR140
0.001
C72
10
R120
33kR68
0.001
C66
1k
R121
0.01
C39
470k
R75
0.01C19
0.01 C10
NJU7008F3
IC9
1
2
3
4
5
0.01
C11
47kR52
330
R97
22k R60
0.1C12
47k
R82
12P
C28
0.01
C42
CP10SCP15
TXD32
0.001
C58
100kR123
33kR66
1kR136
47k R79
100 R117
TC7SHU04FU
IC18
1
2
3
4
5
0.01C18
33kR65
CP06S
CP17
RXD32
47R101
10
C51
10kR103
BD5242G
IC3
1
OUT
2
VDD
3
VSS
4
NC
5
CD
24LC64T
IC5
1
A0
2
A1
3
A2
4
VSS
5
SDA
6
SCL
7
WP
8
VCC
TC74LVX4245FS
IC7
1
VCCA
2
DIR
3
A1
4
A2
5
A3
6
A4
7
A5
8
A6
9
A7
10
A8
11
GND
12
GND
13
GND
14
B8
15
B7
16
B6
17
B5
18
B4
19
B3
20
B2
21
B1
22
G
23
VCCB
24
VCCB
0.01C54
0.01 C14
TC7S08FU
IC12
1
2
3
4
5
LS35J2
S3
TC7S04FU
IC14
1
2
3
4
5
0.001
C71
0.01
C78
1k R118
10kR99
47kR20
0.1 C16
47kR46
1kR133
330k
R10
390
R89
0.001
C75
47kR90
47kR50
0.1
C33
EC11EAB24C
S1
1
COM
2
A
3
B
4
COM
5
A
6
B
78
47kR45
47kR36
SHORTLAND
CP1
100
R93
SHORTLAND
CP5
910k
R9
47k R80
15
C2
330
R100
0.001
C73
1kR141
1k
R129
0.01
C41
47k
R76
0.1
C46
0.01
C17
47k R23
2SC4215
Q6
SML-512MW
DS8
0.001C68
47k
R73
NJU6060V
IC15
1
VDD
2
RSTb
3
CSb
4
CLK
5
DATA
6
OSC
7
VSS
8
LED1
9
LED2
10
LED3
47kR44
0.1
C38
100kR19
0.01
C15
47kR37
TC7S00FU
IC17
1
2
3
4
5
47k
R72
3.3M
R91
330
R86
0.01
C45
47k R81
47kR35
15k
R22
47kR59
0.001
C62
47kR7
0.1
C34
0.1
C35
0.001
C63
0.01C81
47kR58
0.01
C31
1
C77
47k R104
100kR124
LS35J2
S2
DTA113ZU
Q4
0.001
C83
LS35J2
S4
10
C9
L1
39U
0.001
C32
10 MSVA
C52
J5
1 2
3 4 5 6 7
8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
41 42
2.2M
R38
2.2k
R40
0.001
C61
SML-512MW
DS2
NJM2370U1
IC2
1
CTRL
2
GND
3
NB
4
VOUT
5
VIN
2.2 MSVA
C23
390
R88
47k
R71
CP10SCP16
100k
R77
DTA113ZU
Q5
SML-512MW
DS10
TC74LVX4245FS
IC6
1
VCCA
2
DIR
3
A1
4
A2
5
A3
6
A4
7
A5
8
A6
9
A7
10
A8
11
GND
12
GND
13
GND
14
B8
15
B7
16
B6
17
B5
18
B4
19
B3
20
B2
21
B1
22
G
23
VCCB
24
VCCB
SML-512MW
DS1
0.001
C74
0.01C22
47kR8
47k
R70
CP06SCP18
0.01
C7
100kR125
47kR57
SML-512MW
DS9
47k
R116
100k
R5
0
R122
47k
R115
0.001C67
0.01
C86
390
R21
10 MSVA
C49
47kR51
0.01
C85
SML-512MW
DS6
1M
R43
1kR137
0.1
C37
0.1
C36
0.001
C64
1kR139
0.01
C1
330
R85
390
R49
0.01
C50
CP06SCP19
CP06SCP4
ADM202EARUZ
IC10
1
C1+
2
V+
3
C1-
4
C2+
5
C2-
6
V-
7
T2OUT
8
R2IN
9
R2OUT
10
T2IN
11
T1IN
12
R1OUT
13
R1IN
14
T1OUT
15
GND
16
VCC
0.001
C79
1kR131
2.2M
R126
22k R64
LS35J2
S5
NNCD6.2G
D4
1 2 3
4 5
0.01
C60
47kR31
10kR11
SML-512MW
DS5
12P
C27
0.1
C13
1kR130
TA78L05F
IC16
IO
G
100
R6
0.01C40
TC7S08FU
IC11
1
2
3
4
5
47kR119
100kR12
10
C55
0.01
C8
47k
R114
15
R83
LS35J2
S6
390
R48
0.01
C3
15
C4
0.001
C70
47k
R134
DTA113ZU
Q7
10k
R113
22k R62
4.7k
R128
0.1C82
47k
R78
100kR13
*R142
J6
12 34 56 78 910 11
12
13 14 15 16 17 18 19 20 21 22
J4 12 34 56 78 910
9.8304MHZ
X1 CR-789A
ANS0010
D2
SML-A12MT T86J
DS3
SML-A12MT T86J
DS4
HD64F38347WV (AX-2974A-8)
IC4
1
P10/TMOW
2
P11/TMOFL
3
P12/TMOFH
4
P13/TMIG
5
P14/IRQ4/ADTRG
6
P15/IRQ1/TMIC
7
P16/IRQ2
8
P17/IRQ3/TMIF
9
X1
10
X2
11
VSS
12
OCS2
13
OSC1
14
TEST
15
RES
16
P20/SCK1
17
P21/SI1
18
P22/SO1
19
P23
20
P24
21
P25
22
P26
23
P27
24
P30/PWM
25
P31/UD
26
P32/RESO
27
P33/SCK31
28
P34/RXD31
29
P35/TXD31
30
P36/AEVH
31
P37/AEVL
32
CVCC
33
VSS
34
V3
35
V2
36
V1
37
V0
38
VCC
39
PA3/COM4
40
PA2/COM3
41
PA1/COM2
42
PA0/COM1
43
P50/WKP0/SEG1
44
P51/WKP1/SEG2
45
P52/WKP2/SEG3
46
P53/WKP3/SEG4
47
P54/WKP4/SEG5
48
P55/WKP5/SEG6
49
P56/WKP6/SEG7
50
P57/WKP7/SEG8
51
P60/SEG9
52
P61/SEG10
53
P62/SEG11
54
P63/SEG12
55
P64/SEG13
56
P65/SEG14
57
P66/SEG15
58
P67/SEG16
59
P70/SEG17
60
P71/SEG18
61
P72/SEG19
62
P73/SEG20
63
P74/SEG21
64
P75/SEG22
65
P76/SEG23
66
P77/SEG24
67
P80/SEG25
68
P81/SEG26
69
P82/SEG27
70
P83/SEG28
71
P84/SEG29
72
P85/SEG30
73
P86/SEG31
74
P87/SEG32
75
P90/SEG33
76
P91/SEG34
77
P92/SEG35
78
P93/SEG36
79
P94/SEG37/M
80
P95/SEG38/DO
81
P96/SEG39/CL2
82
P97/SEG40/CL1
83
P40/SCK32
84
P41/RXD32
85
P42/TXD32
86
P43/IRQ0
87
AVCC
88
PB0/AN0
89
PB1/AN1
90
PB2/AN2
91
PB3/AN3
92
PB4/AN4
93
PB5/AN5
94
PB6/AN6
95
PB7/AN7
96
PC0/AN8
97
PC1/AN9
98
PC2/AN10
99
PC3/AN11
100
AVSS
DO1 DO2 DO3 DO4 DO5 DO6 DO7 DO8 DO9 DO10 DO11 DO12 DO13 DO14 DO15 RSTB WRB RDB CSB A0
SELB SELC SELA
MEM RCL
SWAP
NOISE
VOX1 VOX2
SELA
SELB
SELC
CLK_IC12
DATA_IC11
SELD
SELD
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D0
D9
D10 D11 D12 D13 D14 D15
SIGN339
SIGN341
SIGN343
A0A0
CSBCSB
RDBRDB
WRBWRB
RSTBRSTB
D1
D8
D7
D6
D5
D4
D3
D2
D1
D0
PTT1_O
RXD31 TXD31
DO15
DO14
DO13
DO12
DO11
DO10
DO9
DO8
DO7
DO6
DO5
DO4
DO3
DO2
DO1
DO0
INCOM_O
REM_O
RSSI VOX1 VOX2
NOISE
25KA 25KB 1MA 1MB
EC
PHOTO
FW1/JTG3
JTG1
FW2/JTG2
JTG4
MONI
CLK_IC12
DATA_IC11
EXGP1 EXGP3 EXGP2
EXGP1 EXGP2 EXGP3
SIGN342
SIGN340
JTG1
JTG4
RXD31 TXD31 EXGP0
EXGP0
INCOM_O
VR
DUAL
C A
TXD32
C A B
RXD32 REM_O
RSSI
A
B
C
CDC
CDC
REM_O
PRT/UL
PRT/UL
RESET
SWAP
RCL
MEM
DUAL
EC
REG_C2
RSSI VOX2 VOX1 PRT/UL NOISE MONI BPOUT
CSDM
REG_C2 PTT1_O TXD32 RXD32 VR
CSDM
CLK_IC12
DATA_IC11
FW1/JTG3
FW2/JTG2
RESET
BPOUT
PHOTO
DO0
1MA 1MB
25KB
DIAL
25KA
5C
TO EL DISPLAY
JTAG3
JTAG2
GND
TO ONCHIP
EMULATOR
SEL CSEL BSEL A
SEL D
<-->
RCL MEM DUAL
EC
DAIAL BL VR BL
CLK DATA
16V 16V
3C
5C
5C
RESET
5C
5C
5C
5C
5C
5C
PONPON
5C
10C
10C
3C
SDA SCL
1K
R2
100
R3
VOLUME
UNIT
To FRONT UNIT J3
To VOLUME UNIT J1
0.01
C2
0.01
C1
0.001
C3
0.001
C4
J1
1
2
3
4
5
6
78
TP76N00NA
R1
1
2
3
4
5
6
7
MONI
PON
VR
5V
FRONT UNT

Icom IC-A220T Specifications

General

Brand	Icom
Model	IC-A220T
Category	Transceiver
Language	English