Icom IC-R20, Service Manual

Page: 19 / 117

Jan. 2010
18
*: Refer to the PARTS LIST for the value and name of component.
C177
0.001
D36
MA133
C88
0.001
R26 1k
C152
1
Q26
2SJ144 Y F
R31 47k
Q31
HAT1023R
5
D
6
D
7
D
8
D
1
S
2
S
3
S
4
G
C106
33
Q8
2SA1588 GR F IC5
TA31056FG
1
IN
2
VREF 3
NF
4
COMP
5
GND
6
OUT
7
TB
8
VCC
C1
0.1
Q25
XP6501
1 2 3
4 5 6
C114
0.001
R56
4.7k
C178
0.001
IC9
R1111N321B F
1
VDD
2
GND 3
CE
4
NC
5
VOUT
Q33
2SB1132
C113
0.1
C62
4.7
C37
47p
C40
33
C68
0.001
C124
0.1 C111
0.1 R142
15k
C97
0.1
R94
47k
C39
0.1
C183
0.0047
C69
0.001
IC11
TC7W04FU F
1
2
3
4
5
6
7
8
EP8
C45
0.1
C42
100p
R4 10k
D29
SB07-03C E
EP6
AFOUT
AFOUT
AFOUT
AFOUT
AFOUT
AFOUT
AFOUT
AFOUT
GND
C120
0.1
C33
0.001
C93
0.001
C173
0.001
R8
47k
R7
10k
C172
0.1
C61
0.001
C116
0.1
C7
0.01
D35
MA2S7280G
C44
4.7
Q14
2SA1588 GR F
C109
0.1
C141
0.001
R129
180k
Q7
XP1501
1 2 3
5
C34
220
Q17
2SA1588 GR F
R98
33k
C158
0.1
EP10
C43
4.7
R121
10
C89
0.001
C104
0.1
R127
470k
Q13
XP6501
1 2 3
4 5 6
R64
470
EP9
C182
0.001
C51
0.001
C16
0.001
C125
0.1
C102
0.1
IC8
R1111N321B F
1
VDD 2
GND 3
CE
4
NC
5
VOUT
R164
1M
C31
0.47
R74
47k
R137
100k
R136
82k
D22
1SS372 F
R54
10k
C24
0.001
Q9
2SB1132
R150 150k
R151
39k
R166
39k
C151
0.001
C154
0.1
C142
100p
C100
0.022 C94
0.0022
R168
100k
C160
330p
C131
1
C135
1 C143
1 C149
1
C126
1 C132
1 C138
1 C144
1
C162
0.1
Q28
2SC4617
C118
1
D21
1SS400
R147
2.2M
Q23
2SC4617
R11
1k
R24 1k
C91
0.001
R126
470k
R148 150k
R149 39k
R165
39k
C99
0.022
C92
0.0022
C108
0.1
C139
0.001
C140
100p C150
0.001
C153
0.1
C87
0.001
C170
0.1 C156
0.1
R163
1M
Q24
XP6501
1 2 3
4 5 6
R141
15k
C119
0.1
C117
1 C115
0.1
R118
10
C101
0.1
C112
0.1
C103
0.1
Q22
2SC4617
R128
180k
D20
1SS400
R134
82k
C122
0.1
C123
0.1
C110
0.1
Q27
2SJ144 Y F
R154
2.2M
C84
0.0047
C95
0.1
C86
0.1
Q19
2SJ144 Y F
R114
2.2M
R117
1M
C96
0.1
R169
100k
C161
330p
Q30
2SB1201 S-TL-
E
R185
12
R186
12
Q35
UNR9213G0
R189
1k
D28
MA2S1110G
C176
0.1
R157
82k
R139
82k
R162
82k
R140
82k
R143
470k
R144
470k
R115
12k
R116
12k R113
120k
R112
120k
C127
470p
C128
470p
C145
0.015
C146
0.015
R131
820k
R133
820k
R70_JPW
R57 JPW
R71_JPW
S3
S2
S18
S9 S14 S20
S4 S10
S8
S15
S13
S21
S1 S7
S19
CP3
CP4
J6
IC3*
1
P94/DA1/TB4IN
2
P93/DA0/TB3IN
3
P92/TB2IN/SOUT3
4
P91/TB1IN/SIN3
5
P90/TB0IN/CLK3
6
BYTE
7
CNVSS
8
P87/XCIN
9
P86/XCOUT
10
RESET
11
XOUT
12
VSS
13
XIN
14
VCC
15
P85/NMI
16
P84/INT2
17
P83/INT1
18
P82/INT0
19
P81/TA4IN/U
20
P80/TA4OUT/U
21
P77/TA3IN
22
P76/TA3OUT
23
P75/TA2IN/W
24
P74/TA2OUT/W
25
P73/CTS2/RTS2
26
P72/clk2/TA1OUT
27
P71/RXD2/SCL
28
P70/TXD2/SDA
29
P67/TXD1
30
P66/RXD1
31
P65/CLK1
32
P64/CTS1/RTS1
33
P63/TXD0
34
P62/RXD0
35
P61/CLK0
36
P60/CTS0/RTS0
37
P57/RDY/CLKOUT
38
P56/ALE
39
P55/HOLD
40
P54/HLDA
41
P53/BCLK
42
P52/RD
43
P51/WRH/BHE
44
P50/WRL/WR
45
P47/CS3
46
P46/CS2
47
P45/CS1
48
P44/CS0
49
P43/A19
50
P42/A18
51
P41/A17
52
P40/A16
53
P37/A15
54
P36/A14
55
P35/A13
56
P34/A12
57
P33/A11
58
P32/A10
59
P31/A9
60
VCC
61
P30/A8(/-/D7)
62
VSS
63
P27/A7(/D7/D6)
64
P26/A6(/D6/D5)
65
P25/A5(/D/D4)
66
P24/A4(/D4/D3)
67
P23/A3(/D3/D2)
68
P22/A2(/D2/D1)
69
P21/A1(/D1/D0)
70
P20/A0(/D0/-)
71
P17/D15/INT5
72
P16/D14/INT4
73
P15/D13/INT3
74
P14/D12
75
P13/D11
76
P12/D10
77
P11/D9
78
P10/D8
79
P07/D7
80
P06/D6
81
P05/D5
82
P04/D4
83
P03/D3
84
P02/D2
85
P01/D1
86
P00/D0
87
P107/AN7/KI3
88
P106/AN6/KI2
89
P105/AN5/KI1
90
P104/AN4/KI0
91
P103/AN3
92
P102/AN2
93
P101/AN1
94
AVSS
95
P100/AN0
96
VREF
97
AVCC
98
P97/ADTRG/SIN4
99
P96/ANEX1/SOUT4
100
P95/ANEX0/CLK4
S5 S11 S16 S22
S6 S12 S17 S23
D12
1SS400 D9
1SS400 D6
1SS400 D3
1SS400
R10
10k
R9
47k
IC1
CAT24C256XI
1
A0
2
A1
3
NC
4
VSS
5
SDA
6
SCL
7
WP
8
VCC
C2 0.001 C3 0.001 C4 0.001 C5 0.001 C6 0.001 C8 0.001 C9 0.001 C10 0.001 C11 0.001 C12 0.001 C14 0.001
R35 1k
R42 1k
R51 1k
R61 150k R60 150k R59 150k R58 150k
C13
0.1
C23
0.1
D23
1SS372 F D24
1SS372 F D25
1SS372 F
R22 JPW
R77 1k
R72_JPW
R73_JPW
EP7
C36
82p
R66 1k
R68 1k
R19
82
DS2
Q1
2SC4617
DS3
R23
82
DS4
R14
82
DS1
R29
82 R49
82 R53
82 R55
82
Q4
2SC4617
DS5
DS1–DS9_SML-512UW
DS6 DS7
R38
82
DS8
C26
0.001
Q5
2SC4617
R33
100k
R192
180k
R193
100k
C175
0.1
R36 4.7k
D33
MA8027GH
Q29
UNR9213G0
D32
MA2S1110G
R180
47k
C180
0.001
R191
100k
C174
0.1 R190
47k
C54
0.1
R96
1M
R85
100
C73
0.01
C53
0.01
C74
470p
C50
0.1
Q11
UNR9113G0
SVC389 SVC389
C49
0.1
R84
10k
R91
5.6k C47
0.1
Q12
2SC4617
C46
1
R101
5.6k
C58
0.1
C60
0.1
Q16
2SC4617
C57
1
R95
10k
IC7
SM6451B
1
RSTN
2 ADRS1
3 ADRS2
4 DVDD
5 LOUT
6
LIN
7
AVDD
8
VRL
9
VRR
10
AVSS
11
RIN
12
ROUT
13
DVSS
14
MLEN
15
MCK
16
MDT
C55
0.001
R90
4.7k
C52
0.001
C48
0.001
R100
ERJ2GE-JPW
C64
0.001
C63
0.001
C59
0.001
C85
0.1
X1
CR-717
R27
10
R28
1M
C22
15p
C27
0.01
R82
47k
R76
47k
R67 1k
R83
47k
R43 15k
IC4
TC7W04FU F
1
2
3
4
5
6
7
8
R40
10k
R34
10k
R41
12k
R15
100k D13
1SS400
Q3
2SA1586 GR F
Q6
2SC4116 GR F
R20
100k
R39
10k
D31
1SS400
D30
1SS400
D26
1SS400
D27
1SS400
C41
0.1
IC2
BD5228G
1
OUT
2
VDD
3
VSS
4
NC
5
CD
J3
J8
1
2
3
C171
0.01 R178
390k
C167
0.0022 R172
2.2M
C157
470p C148
680p
R161
470k
R160
2.2M
R156
180k
R146
100k
C134
820p
C137
270p R155
180k
R125
470k
C168
0.0018
R175
100k
C164
330p
C169
0.01 R176
390k
C165
0.0022
R170
2.2M
C155
470p C147
680p
R159
470k
R158
2.2M
R153
180k
R145
100k
C133
820p
C136
270p R152
180k
R124
470k
C166
0.0018
R174
100k
C163
330p
R135
100k
S26
CP5
CP6
CP1
CP2
Q36_2SC4617
R198
100k C185
0.001
Q37
2SA1588 GR F
C186
0.001
C187
0.001
C188
0.001
DS9
R202
82 R32
1k R12
1k
C38
3.3
C70
10 C80
10
C82
22
C83
22
C159
4.7
1
2
3
4
5
6
7
8
9
C107
10
C105
4.7
C98
4.7
C90
4.7
C29
0.1
R203
82 R204
82
R205
82
R206
82
R30
1k
R89
470k
R99
470k
R201
470k
R200
8.2k
R104
470k
R105
6.8k
R86
100k
R88
2.2k
C77
0.001
IC6
TC7SU04F F
1
1
2
2
3
3
4
5
C189
0.001
DS11
SML-512UW
R199
220
R111
JPW
C190
0.1
Q10
2SA1362 GR F
Q15
2SA1362 GR F
Q38
XP4601
1 2 3
4 5 6
R207
100k
R208
100k
R122
10k
R103
33k
R179
180k
R177
180k
R87
39k
IC14
TC7S08FU F
1
2
3
4
5
IC15
TC7S08FU F
1
2
3
4
5
R209
100k
C191
0.1
R2_10k
R3_10k
R5_10k
R6_10k
R17 10k
R18 10k
R63
10k
X2
CSBFB453K
EP12_CV1081
Q32
2SC4617
R183
1k
IC12
LM2904PWR
1
2
3
4 5
6
7
8
IC13
LM2904PWR
1
2
3
4
5
6
7
8
R182
1.2k
R187
1k
R188
150
R210
100k
R106
JPW
R213
JPW
R214
JPW
D34
SB07-03C E
R216
JPW
R215
JPW
Q20
UNR9115G0
C30
1
C35
1
R1
3.3k
R21 3.3k
R25 3.3k
R123
820
R120
820
R107
1M
R108
470k
D14
HVC376B-E
C28
470p
R52
100k
R62
100k
L1
10µH
C194
1
R167
10k
R110
82k
R119
12k
R69 10k
R211
470
R212
470
R217
100k
R194
100k
R195
180k
R181
68
R184
82
R196
6.8
R197
6.8
Q34 UNR9215G0
R93
1M
R97
1M
C56
0.01 C65
0.01
R130
180k
R132
180k
EP13
MZA2010D121C
Q21
UNR9115G0
R45 10
D8*
D5*
D2* D11*
C196
0.1
R47_2.2M
MP5
A_VSCAF
CHGS
A_VCO2
LD2
B_VCO2
B_RSSI
B_VCO3
B_VCO4
ECK
ESIO
PLLDSTB
PLLCK
PLLESTB PLLCSTB PLLASTB
KR1
KR4
KR5
KR0 KR1 KR2 KR3 KS0 KS1 KS2 KS3
KS3
KS2
KS1
KS0
KR5
KR3
KR2
KR0
A_RTONE
B_VSCAF
B_RTONE
B_CTONE
A_CTONE
BUSY SCLK
A_NOISE
B_NOISE
B_AF_THURU B_AF_THURU
A_RTONE
B_CTONE
TEMP
BATTIN
HVIN
HVDET
TEMP
B_AMUTE B_AMUTE
CNVSS
BEEP BEEP
BEEP
BFO_SHIFT
BUSY
SCLK
RXD
TXD
RESET
CNVSS
BUSY
SCLK
RXD
TXD
RESET
CNVSS
HVDET
BFOC
BFO
CKO
CKO
+3SC
CK
DATA
CK
AFON
A_CTONE
D
CLK
D
CLK
RESET
RESET
A_TCON
B_TCON
B_RTONE
EAR
A_AIN A_AIN
A_AIN
B_AIN B_AIN
AOUT AOUT
B_R3C
A_R3C
VRSTB
+3SC
LIGHT
B3C
I1
I0 I1
B T S R V B T S R V
B_TCON
KR4
VOL_UP_DOWN
CK
DATA
DATA
DATA
DATA
POWER
CIV_IN CIV_OUT
CPU3V
CPU3V
CPU3V
CPU3V
CPU3V
CPU3V CPU3V
CPU3V
CPU3V CPU3V
HVIN
BATTIN
CPU3V
CPU3V
CPU3V
CHGC
CIV_IN
A_RSSI
REC
C81 1
C79 1
C78 1
C76 1
C75 1
C184 1
C71 1
C67 1
C66 1
C72 1
J9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23 25
24
LCD_CS
LCD_RESET
LCD_RS
CK
DATA
PCON
LIGHT
LIGHT
LIGHT
A_VCO1
PLLBSTB
SQL
A_AF_THURU
B_AMUTE
AFON
CIV_OUT
CIV_IN
SUB_3C
RXD
RXD
TXD
TXD
B_DCK A_DUD A_DCK B_DUD
A_VCO1
REC
CHGS
CHGC
LD1
B2C
B1C
HFC
PLLDATA
STR2
PCON
B_AF_THURU
A_R3C
A_TCON
LCD_CS
BFOC
B_R3C
LCD_RESET
LCD_RS
A_VCO2
A_AF_THURU
A_AF_THURU
A_VSCAF
A_RSSI
B_VSCAF
CPU3V CPU3V
CPU3V
A_R3V
+3S
+3S
VP
VP
BFO_SHIFT
DATAC
K C K C
DATA
D
CLK
DATAC
CLS1
POWER
CLS0
+3V
+3V
+3V
+3V
+3V
VCC
VCC
A_DET
A_R3V
A_R3V A_R3V
B_DET
B_R3V
B_DET
A_DET
B_DET
A_DET
B_TCON
B_RTONE
A_R3V
A_TCON
A_RTONE
B_R3V
BFO
PLLCSTB
PLLESTB
PLLBSTB
VP
PLLASTB
A_R3V
B_R3V
B_NOISE
B_RSSI
+3V
A_DET
B_DET
D
A_NOISE
+3S
EAR
LD1
CLK
B3C
B2C
B1C
HFC
STR2
PLLDATA
PLLCK
B_VCO4
B_VCO2
B_VCO3
LD2
A_VCO2
A_RSSI
CK
DATA
CK
DATA
CK DATA
CK
DATA
A_VCO1
BFO
PLLCSTB
PLLESTB
PLLBSTB
VP
PLLASTB
A_R3V
B_R3V
B_NOISE
B_RSSI
+3V
A_DET
B_DET
D
A_NOISE
+3S
EAR
LD1
CLK
B3C
B2C
B1C
HFC
STR2
PLLDATA
PLLCK
B_VCO4
B_VCO2
B_VCO3
LD2
C179
0.001 C181
0.001 C192
0.1
B_CTONE
A_CTONE
DW MAIN
1
4
7
<< >> PLAY REC
SCOPE
BAND VFO MODE MR
B3 B2 B1 B0
POWER
EP3
EP4
S25
1
COM
2
A
3
B
S24
1
COM
2
A
3
B
EP1
EP2
C18
47p
C20
47p
C19
47p C21
47p
B_DCK
B_DUD
A_DCK
A_DUD
A DIAL
B DIAL
R13
120k
(HJ9)
1
2
3
4
5
6
(HJ8)
1
2
3
4
C193
0.1
TXD
A_AIN
B_AIN
AOUT
SQL
SUB_3C
RXD
VOL_UP_DOWN
TXD (CPU_TX)
A_AIN
B_AIN
GND
AOUT
SQL
SUB_3C
+3V
RXD (CPU_RX)
VOL_UP_DOWN to REC
unit
J7
to REC
unit
J6
EXT SP
EXT DC
INT SP
B GND
Li+
Li–
S
REC
J5
21
1
22
2
23
3
24
4
25
5
26
6
27
7
28
8
29
9
30
10
31 11
32
12
33
13
34
14
35
15
36
16
37
17
38
18
39
40
19
20
to RF unit J1
to_LCD
DS12
M3-0243TIY
4
Explanatory notes
VOLTAGE LINE
RX LINE
RECORDING LINE
PLAYBACK LINE
2 3
5 6 0
8 9
.
4
LOGIC UNIT
B_R3V
B_R3V
+3S
+3S
+3S
+3S
+3V
+3V +3V
+3V
+3V
+3V
+3V
+3V
+3V
B_R3V
Approx. 12V
3.2V
3.6V
3.1V
3.3V_SQL_OPEN
3.1V
3.0V
3.0V 3.0V
3.2V
3.7V
TSQL/DTCS/VSC ON
2.9V
3.0V
3.0V
2.9V
TSQL/DTCS/VSC ON
3.6V
3.2V
3.1V
2.8V
CW/BFO_ON
PLLDSTB PLLDSTB
3.1V
D18 D37