Icom ic-r20 Service Manual page 44

Aug. 2009
R30
1k
MP5
CPU3V
C23
R217
0.1
100k
R1
3.3k
76
P12/D10
77 P11/D9
LD2
78 P10/D8
B_VCO2 R5_10k 79 P07/D7
B_VCO3 80 P06/D6
B_VCO4 81 P05/D5
82 P04/D4
VOL_UP_DOWN 83 P03/D3
TEMP 84 P02/D2
BATTIN R2_10k
85 P01/D1
HVIN 86 P00/D0
B_RSSI R6_10k 87 P107/AN7/KI3
IC3*
A_VSCAF 88
P106/AN6/KI2
A_CTONE 89 P105/AN5/KI1
B_CTONE 90
P104/AN4/KI0
A_RSSI R3_10k 91
P103/AN3
B_RTONE 92
P102/AN2
B_VSCAF 93
P101/AN1
94
AVSS
A_RTONE 95
P100/AN0
P97/ADTRG/SIN4
96
CPU3V CPU3V VREF
P96/ANEX1/SOUT4
97
AVCC
IC1
C1 98 P95/ANEX0/CLK4
R9
0.1 CAT24C256XI 47k 99
100
1 8 R10
A0 VCC
10k
2 7
A1 WP
6
3 NC
SCL
4 VSS 5
SDA
C13 R11
0.1 1k
A_VCO2
R4 10k
IC2
BD5228G
1 OUT 5
CD
2 VDD
4 C7
3
NC
VSS 0.01
B_NOISE
A_NOISE
BEEP
BFO_SHIFT
R27
CPU3V 10
RESET
C22
POWER
15p
C16
KR0
0.001
S1 S7 S18
DW MAIN
POWER
KR1
Q1
2SC4617
S2 S8 S13 S19
BAND VFO MODE MR
KR2
R12 R14 R19 R23 R29
1k 82 82 82 82
S3 S9 S14 S20
DS1 DS2 DS3 DS4
1 2 3 SCOPE
KR3
S4 S10 S15 S21
Q5
4 5 6 0 2SC4617
EP12_CV1081
KR4
S5 S11 S16 S22
.
7 8 9 R33
R203 R204
100k
82 82 R205
KR5
82
S6 S12 S17 S23
<< >> PLAY REC
C26
D3 D6 D9 D12
0.001
IC4
1SS400 1SS400 1SS400 1SS400
R15 R20
100k 100k TC7W04FU F
3.2V
1
2
3
B3 B2 B1 B0
4
I1
D2* D5* D8* D11*
KS3
KS2
KS1
KS0
AFON
1
CPU3V CPU3V
2
CNVSS CNVSS
3 RESET RESET
4 TXD TXD
5 RXD RXD
R8
6 SCLK SCLK
47k
7 BUSY BUSY
8
R7
9
10k
S24
EP1
2
A_DCK
A
3
A DIAL B EP2
A_DUD
1
COM
C20
C18
47p
47p
S25
LOGIC UNIT
EP3
2
B_DUD
A
3
B DIAL B
EP4
1 B_DCK
COM
C21 C19
47p 47p
BFO_SHIFT
B_TCON
PCON
+3S
BFOC
3.2V
CPU3V
+3V
R74 R76 R83 CKO
47k 47k 47k
CPU3V
50
P42/A18 R63
49
10k
P43/A19
48 STR2
P44/CS0
47 PLLDATA
P45/CS1
46
HFC
P46/CS2
45 R77 1k B1C
P47/CS3
44 B3C
P50/WRL/WR
43 B2C
P51/WRH/BHE
42 LD1
P52/RD
41 LIGHT
P53/BCLK
40 +3SC +3SC
R66 1k
P54/HLDA
39 R67 1k CHGC
P55/HOLD
R68 1k
38 CHGS
P56/ALE
37 R69 10k CKO
P57/RDY/CLKOUT
36 REC
P60/CTS0/RTS0
CK
35 CK
P61/CLK0
34 VRSTB
P62/RXD0 PCON
33 DATA
P63/TXD0
EP13
32
P64/CTS1/RTS1
31 MZA2010D121C A_VCO1
P65/CLK1
30
P66/RXD1
29
P67/TXD1
28 CIV_OUT
P70/TXD2/SDA
27 CIV_IN
P71/RXD2/SCL
SUB_3C
26
P72/clk2/TA1OUT
B_TCON
P73/CTS2/RTS2
R82
47k
RXD
TXD
B_RTONE
SQL
A_AF_THURU
B_AMUTE
C24
A_TCON
0.001
AFON
R28 HVDET
1M
R47_2.2M
D14
HVC376B-E R62 R216
100k JPW
C27
0.01
R52 C30
R215 A_RTONE
X1 C28 C35
1
100k JPW
470p 1
CR-717
+3V +3V
B_CTONE
R214
3.6V
JPW
Q4
EP7
2SC4617
EAR A_CTONE
R32 R38 R49 R53 R55 R202
1k 82 82 82 82 82
A_R3V
DS5 DS6 DS7 DS8 DS9
R213
3.1V
C36 JPW
82p
DS1–DS9_SML-512UW
IC14
Q36_2SC4617
C29 TC7S08FU F
0.1
5 A_R3C
1
R211
2
R198 C185 R199 4 470 D
3
100k 0.001 220
DATA
REC
B_R3C
R206
IC15
DS11
82
SML-512UW V R
TC7S08FU F
1 5
R212
CLK
2
470 CLK
Q3 R209 3 4 D
3.1V
100k
2SA1586 GR F
+3V
C K
R39
D13
10k R40
1SS400 C46
10k Q7
8
1
C40 C41
XP1501
7
R41
33 0.1
6 12k
5 Q12
5 4
Q9
R34 Q6 2SC4617
10k
2SB1132
2SC4116 GR F
1 2 3
R56
4.7k C47
0.1
R54 C31
10k 0.47 3.3V_SQL_OPEN
Q8
2SA1588 GR F IC5
TA31056FG
C38
R64
8 VCC 1
3.3
470 IN
7 TB 2
VREF 3
6
OUT NF 4
C34 5
GND COMP
220 EP8
C39
0.1
C44
C42 C43
100p 4.7 4.7
AFOUT
+3V
24
3.1V
IC6
TC7SU04F F
Q38
1
1
5
2 XP4601
CW/BFO_ON 2 Q37
3
2.8V 4
3 2SA1588 GR F
6 5 4
R96
1M
C73
R85 R201
C188
0.01
100
0.001 470k
1 2 3
C56 C65
R200
C50 C53 X2 C186
0.01 R103
0.01 8.2k
0.1 0.01 CSBFB453K 0.001
33k
R207
R93
R97
C74 C187 R208 100k C54
Q11
1M 1M
470p 0.001 100k
0.1
UNR9113G0
D18
HN2V02H-B(F)
CPU3V 5
1
VOUT VDD 2
Q14
Q17 GND 3
C82 4 R111
NC CE
2SA1588 GR F 2SA1588 GR F 22 JPW
IC8
C61 C68
C45 R87 R1111N321B F
R104
0.001
0.1 39k 0.001
470k 5
1
VOUT VDD 2
4 GND 3
C83
R86 R105
NC CE
22
100k Q13 6.8k
XP6501 IC9
C69 C98
R1111N321B F
0.001 4.7
R98
C51 R88 R94 C62
C89
C77
0.001 33k
2.2k 47k 4.7
0.001 0.001
3.6V
3.2V
DATA
C90
4.7
CK CK
DATA DATA
B_R3V B_R3V
B_TCON
C87 C91
0.001 0.001
R112
120k
B_RTONE
C92 C99
0.0022 0.022
A_R3V
A_TCON
C93
C88
0.001 0.001
R113
120k
A_RTONE
C94 C100
0.0022 0.022
B_CTONE
A_CTONE
3.0V 3.0V
B_R3V
Q10
Q15
C95 C101
2SA1362 GR F
2SA1362 GR F 0.1
0.1
Q19
C59
C48 R106 C86
2SJ144 Y F
0.001
0.001 JPW
0.1
DATA
R99
R89 C55 R100 C64 C84 C85
R90
470k 0.001 ERJ2GE-JPW 470k 0.001
4.7k 0.0047 0.1
C63
R107 R108 R110 R114
C52
0.001 1M 470k 82k 2.2M
0.001
S T B V R S T B
A_R3V A_R3V
C96
CLK
0.1
D
3.0V
C K
+3S
+3S IC7
C49 C57 C60 SM6451B
C189
B_AMUTE
0.1 1 0.1
0.001
1 RSTN 16 AOUT
MDT
2 ADRS1 15 BEEP
MCK
3 ADRS2 14
Q16 A_AIN
MLEN
+3S
4 DVDD 13
DVSS
2SC4617
5 LOUT 12
ROUT
A_R3V
6 LIN 11
R84 R95
RIN
10k 7 10
10k AVSS C97 C102
AVDD
8 9
0.1 0.1
VRL VRR
R101
R91 C58
C70 C80
5.6k 0.1 5.6k
10 10
C190
0.1
Q23
2SC4617
Explanatory notes
VOLTAGE LINE RECORDING LINE
RX LINE PLAYBACK LINE
AFOUT
+3V
*: Refer to the PARTS LIST for the value and name of component.
Approx. 12V
3.1V
C191
0.1
+3V +3V
L1
C194
10µH 1
+3V
Q28
C131 C135 C143 C149 C152 2SC4617
1 1 1 1 1
1 8
2 7
3 6
C162
C105
5
4 0.1
4.7
R167
IC11
C159
10k
4.7
TC7W04FU F
D22 D23 D24 D25
1SS372 F 1SS372 F 1SS372 F 1SS372 F
R210
C126 C132 C138 C144
100k
1 1 1 1
C106 C114
33 0.001
CK
DATA
TSQL/DTCS/VSC ON
2.9V
R130 R157
R139
Q20
180k
82k 82k B_DET
UNR9115G0
R131 R143 C139 C145
C127
820k 470k 0.001 0.015
470p
R115
12k
B_VSCAF
1 8
R148 150k
2 7
3 6
R126 C140 C150 R165 C153
C108 4 5
100p 39k 0.1
0.1 470k 0.001
IC12
R149 39k
LM2904PWR
TSQL/DTCS/VSC ON
R132 R140 2.9V
Q21 R162
180k 82k
82k A_DET
UNR9115G0
C128 C141
R133 R144 C146
470p
820k 470k 0.001 0.015
R116
12k A_VSCAF
1 8
R150 150k
2 7
3 6
C109 R127 R166 C154
4 5 C142 C151
0.1 470k
100p 0.001 39k 0.1
IC13
LM2904PWR R151
R168 R174
39k
100k 100k
B_DET
C160 C163
330p 330p
R175
R169
100k 100k A_DET
3.0V C161 C164
R118
330p 330p
10
Q24
XP6501
R119 C115 C117
C136 R152 R158
12k 0.1 1
270p 180k 2.2M
C103 R124 D20 C147 C155 R176 C169
C119
470k 1SS400 680p 470p 390k 0.01 B_DET
0.1 0.1
C112 R134 C133 R153
C165
0.1 82k 820p 180k
0.0022
R117 R120 C110 R128 R135 C122 R141 R145 R159 R170
1M 820 0.1 180k 100k 0.1 15k 100k 470k 2.2M
Q27
R177
Q22 2SJ144 Y F C156 C170
0.1 180k 0.1
2SC4617
C123 R163 C166
0.1 1M 0.0018
R154
2.2M
B_AF_THURU B_AF_THURU
B_AIN
B_AMUTE
R121
3.0V
10
C116
R122
0.1
10k
C118
Q25 C137 R155 R160
1
270p 180k 2.2M
XP6501
R125 C113 D21 C120 C148 C157 R178 C171
C104
470k 0.1 1SS400 0.1 680p 470p 390k 0.01
0.1 A_DET
C134 R156
R136
R172 C167
820p 180k
82k
2.2M 0.0022
R161
R123 C111 R129 R137 C124 R142 R146
470k
820 Q26
0.1 180k 100k 0.1 15k 100k
C158 R179 C172
2SJ144 Y F
0.1 180k 0.1
R164
C168
1M 0.0018
C125 R147
0.1 2.2M
A_AF_THURU
A_AF_THURU
J9
23 25
LCD_CS
22
LCD_RESET
21
LCD_RS
20
CK CK
19
DATA DATA
18
17
16
C66 1
15
C67 1
14
13
to_LCD
C71 1
12
DS12
C72 1
11 M3-0243TIY
10
C184 1
9
C75 1
8
C76 1
7
C78 1
6
C79 1
5
C81 1
4
3
2
1
24
J5
1
A_RSSI A_RSSI
40 2
A_VCO2 A_VCO2
A_NOISE A_NOISE
39 3
A_VCO1 A_VCO1
38 4
EAR EAR
A_R3V A_R3V
37 5
LD1 LD1
A_DET A_DET
36 6
CLK CLK
BFO BFO
35 7
D D
PLLASTB PLLASTB
34 8
B3C B3C
PLLCSTB PLLCSTB
33 9
B2C B2C
PLLESTB PLLESTB to RF unit J1
32 10
B1C B1C
31 11
HFC HFC
VP VP
30 12
STR2 STR2
PLLDSTB PLLDSTB
29 13
PLLDATA PLLDATA
PLLBSTB PLLBSTB
28 14
PLLCK PLLCK
27 15
B_VCO4 B_VCO4
+3V +3V
26 16
B_VCO3 B_VCO3
B_RSSI B_RSSI
25 17
B_VCO2 B_VCO2
B_NOISE B_NOISE
24 18
23 19
+3S +3S
B_R3V B_R3V
22 20
LD2 LD2
B_DET B_DET
21
C179 C181 C192
0.001 0.001 0.1
TEMP
C174 R190
CPU3V R191
0.1 47k
100k
D26
1SS400 R192
180k
HVIN
CP6
S
D30 C175 R193
S26
1SS400 0.1 100k
D27
R194 CP1
1SS400
Li+
BATTIN 100k
VCC
CP3
C176 R195 3.7V
D31 C182
0.1 180k
1SS400 0.001
CP4
VCC
Li–
CP2
Q31
C107
HAT1023R
10
EP9 J6
8 1
D S
EXT DC
7 2 D34
D S C183
6 D 3 SB07-03C E
S 0.0047
5 4
D G
D35
C177
R183 MA2S7280G
0.001 CP5 B GND
1k
Q30
C178 C196 EP10
D29
0.001 0.1
E
2SB1201 S-TL-
SB07-03C E
R185
C173
12
0.001
R181 R186 R196
68 12 6.8 Q33
2SB1132
R182
1.2k
R197 Q35
R189
6.8
D28 UNR9213G0
1k
MA2S1110G
R184
D36
82 MA133
CPU3V
Q32
R187
1k
2SC4617
R180
Q34 UNR9215G0
47k
B_AIN
R188
150
C180
AOUT
CHGC
0.001
BEEP
A_AIN CHGS
HVDET
Q29 D32 D33 R13
MA8027GH 120k
MA2S1110G (HJ9)
UNR9213G0
+3V +3V
1
SUB_3C SUB_3C
2
VOL_UP_DOWN VOL_UP_DOWN to REC
3
SQL SQL unit
4
J7
TXD TXD (CPU_TX)
5
RXD RXD (CPU_RX)
6
C193
(HJ8)
0.1
AOUT AOUT
1
A_AIN A_AIN to REC
2
B_AIN unit
B_AIN
3
J6
GND
4
AFOUT AFOUT
AFOUT
EXT SP
R57 JPW
J3
EP6
AFOUT
+3V
J8
AFOUT
2
4
INT SP
GND
1
C37 3
C33
47p 0.001