Logic Unit - Icom IC-R20 Service Manual

11-2 LOGIC UNIT

R30
1k
MP5
CPU3V
R217 C23
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
R2_10k
BATTIN 85 P01/D1
IC3
HVIN 86 P00/D0
B_RSSI M30620MCP-130GP
R6_10k 87 P107/AN7/KI3
A_VSCAF 88
M30620MCP-129GP
P106/AN6/KI2
A_CTONE 89 P105/AN5/KI1
90
B_CTONE
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
96 P97/ADTRG/SIN4
CPU3V CPU3V VREF
P96/ANEX1/SOUT4
97 AVCC
IC1
98 P95/ANEX0/CLK4
C1 R9
0.1 CAT24WC256 99
47k
100
R10
1 8
A0
VCC 10k
2
7
A1 WP
3 NC 6
SCL
4 VSS 5
SDA
C13 R11
0.1 1k
A_VCO2
R4 10k
IC2
BD5228G
1 OUT 5
CD
2 VDD
4
3 C7
VSS NC
0.01
B_NOISE
A_NOISE
BEEP
BFO_SHIFT
R27
CPU3V 10
RESET
C22
POWER
15p
KR0 C16
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
D2 TC7W04FU
D5 100k 100k
MA2S728 3.2V
MA2S728
1
[SEA], [EXP], [CAN] [USA] only
2
only
3
B3 B2 B1 B0
4
I1
D8
D2 D5 D11
KS3
MA2S728 MA2S728
KS2
[USA] only [EUR] only
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
EP3
2 B_DUD
A
3
B DIAL
B EP4
1 B_DCK
COM
C21 C19
47p 47p
B_TCON
PCON
+3S
BFOC
3.2V
CPU3V
+3V
R74 R76 R83
CKO
47k 47k 47k
CPU3V
50
R63
P42/A18
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
+3SC
40 R66 1k +3SC
[USA] only P54/HLDA
39 R67 1k CHGC
P55/HOLD
[OTHER]
38 R68 1k CHGS
P56/ALE
37 R69 10k CKO
P57/RDY/CLKOUT
36 REC
P60/CTS0/RTS0
35 CK 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
26 SUB_3C
P72/clk2/TA1OUT
B_TCON
P73/CTS2/RTS2
R82
47k
RXD
TXD
B_RTONE
SQL
A_AF_THURU
B_AMUTE
C24
0.001 A_TCON
AFON
R28 HVDET
1M
R47_2.2M
D14
HVC376B R62 R216
C27 100k JPW
0.01
R52 R215 C30 A_RTONE
C28
X1 C35
100k JPW 1
470p
CR-717 1
+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
0.1
1 5 A_R3C
R211
2
470 D
R198 C185 R199 3 4
100k 0.001 220
DATA
REC
B_R3C
R206
DS11 IC15
82
SML-512UW VRSTB
TC7S08FU
1 5
R212
CLK
2
470 CLK
R209 3 4
Q3 D
3.1V
100k
2SA1586
+3V CK
R39
D13
10k R40
1SS400
10k C46
Q7
8 1
C40 C41
XP1501
7
R41 33 0.1
6
12k
5 Q12
5 4
Q9
R34 Q6 2SC4617
10k
2SB1132
2SC4116
1 2 3
R56
C47
4.7k
0.1
R54 C31
10k 0.47 3.3V_SQL_OPEN
Q8
2SA1588 IC5
TA31056F
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
C43 C44
C42
4.7
100p 4.7
AFOUT
+3V
3.1V
IC6
SN74AHC1GU04DBVR
BFO_SHIFT
Q38
1
1
5
2 XP4601
CW/BFO_ON 2 Q37
3
2.8V 4
3
2SA1588 6 5 4
R96
1M
C73
R85 R201
0.01 C188
100 470k
0.001
1 2 3
C56 C65
C50 C53 X2 R200 C186
R103
0.01 0.01
0.01 8.2k 0.001
0.1 CSBFB453K
33k
R207
R93 R97
C74 C187 R208 100k
Q11
1M 1M
470p 0.001 100k
UNR9113J
D18
HN2V02H-B
CPU3V 5
1
VOUT VDD 2
Q14 Q17
C82 4 GND 3
NC CE
2SA1588 2SA1588 22
IC8
C61 C68
C45 R87 R1111N321B
R104
0.001 0.001
0.1 39k
470k
5
1
VOUT VDD 2
4 GND 3
C83
R86 R105
NC CE
22
Q13 6.8k
100k
IC9
XP6501
C69
R1111N321B
0.001
R98
C51 R88 R94 C62
C77 C89
33k
0.001 4.7k 47k 4.7
0.001 0.001
3.6V
3.2V
DATA
CK CK
DATA DATA
B_R3V
B_R3V
B_TCON
C87 C91
0.001 0.001
B_RTONE
C92
0.0022
A_R3V
A_TCON
C88 C93
0.001 0.001
A_RTONE
C94
0.0022
B_CTONE
A_CTONE
3.0V 3.0V
B_R3V
Q10
Q15
C95
2SA1362
2SA1362 0.1
Q19
C59
C48 R106
C86
2SJ144
0.001 0.001 JPW
0.1
DATA
R89 C55 R100 R99 C64
R90 C84 C85
0.001 JPW 470k
4.7k 470k 0.001 0.0047 0.1
C63 R107 R108 R110 R114
C52
0.001 1M
470k 82k 2.2M
0.001
VRSTB
A_R3V A_R3V
C96
CLK
0.1
D
3.0V
CK
+3S +3S
IC7
SM6451B
C49 C57 C60
C189 B_AMUTE
0.1 1 0.1
0.001
AOUT
1 RSTN 16
MDT
15 BEEP
2 ADRS1
MCK
3 ADRS2 14
Q16 MLEN A_AIN
+3S 4 DVDD 13
DVSS
2SC4617
5 LOUT 12
ROUT
A_R3V
6 LIN 11
R84 R95
RIN
10k 7 10
10k AVSS C97
AVDD
8 9
VRL VRR 0.1
R91 C58 R101
C70 C80
5.6k 0.1 5.6k
10
10
C190
0.1
Explanatory notes
VOLTAGE LINE RECORDING LINE
RX LINE PLAYBACK LINE
AFOUT
+3V
LOGIC UNIT
Approx. 12V
3.1V
C54
0.1
C191
0.1
+3V +3V
L1 C194
10µH
+3V 1
Q28
C131 C149 C152
R111 C135 C143 2SC4617
JPW 8 1 1 1 1 1
1
2 7
3 6
C105
5
4
4.7
R167
IC11
10k
TC7W04FU
D22 D23 D24 D25
1SS372 1SS372 1SS372 1SS372
C98
4.7
R210
100k C126 C132 C138 C144
1 1 1 1
C90 C106 C114
4.7 33 0.001
TSQL/DTCS/VSC ON
2.9V
R130 R157
Q20 R139
180k 82k
82k
UNR9115J
R131
R143 C139 C145
C127
820k 470k 0.001 0.015
470p
R112 R115
120k 12k
1 8
R148 150k
2 7
3 6
R165 C153
C99 C108 R126 4 5 C140 C150
0.022 0.1 470k 100p 0.001 39k 0.1
IC12
LM2904PWR R149 39k
TSQL/DTCS/VSC ON
R132
R140 2.9V
Q21 R162
180k 82k
82k
UNR9115J
C128
R133 R144 C141 C146
470p
820k 470k 0.001 0.015
R113 R116
120k 12k
1 8
R150 150k
2 7
3 6
C100
C109 R127 C151 R166 C154
4 5 C142
0.022 0.1 470k 39k 0.1
100p 0.001
IC13
LM2904PWR R151
R168 R174
39k
100k 100k
C160 C163
330p 330p
R169 R175
100k 100k
C161 C164
R118 3.0V
10 330p 330p
Q24
XP6501
R119 C115 C117
C101
C136 R152 R158
0.1 12k 0.1 1
270p 180k 2.2M
R124 D20 C147 C155 R176
C103 C119
470k 1SS400 470p 390k
0.1 0.1 680p
C112 R134 C133 R153
C165
82k 820p
0.1 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 C156
180k
0.1
2SC4617
C123 R163 C166
0.1 1M 0.0018
R154
2.2M
B_AF_THURU
B_AIN
R121
3.0V
10
C102 C116
R122
0.1 10k 0.1
C118
Q25 C137 R155 R160
1 270p 180k 2.2M
XP6501
R125 C113 D21 C120
C104 C148 C157 R178
470k
0.1 0.1 1SS400 0.1 680p 470p 390k
Q23 C134 R156
R136
R172 C167
820p 180k
82k
2SC4617 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
2SJ144
0.1 180k
R164
C168
1M
C125 0.0018
R147
0.1
2.2M
A_AF_THURU
A_AF_THURU
11 - 3
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
C162
0.1 A_DET A_DET
36 6
CLK CLK
BFO BFO
C159 35 7
D D
4.7
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
CK
27 15
DATA 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
B_DET 23 19
+3S +3S
B_R3V B_R3V
22 20
LD2 LD2
B_DET B_DET
21
B_VSCAF
C179 C181 C192
0.001 0.001 0.1
TEMP
R190
C174
CPU3V R191
0.1 47k
100k
D26
1SS400 R192
180k
HVIN
CP6 S
D30 C175 R193
S26
1SS400 0.1 100k
A_DET
D27
R194 CP1
1SS400
Li+
100k
BATTIN VCC
CP3
C176
A_VSCAF R195 3.7V C182
D31
0.1 180k 0.001
1SS400
CP4
VCC
Li–
CP2
Q31
C107
HAT1023R
10
EP9 J6
8 1
B_DET
D S
EXT DC
7 2 D34
D S
C183
6 D 3 SB07-03C
S 0.0047
5 4
D G
D35
C177
R183 MA2S728
0.001
CP5 B GND
1k
A_DET
C178 C196 EP10
Q30 2SB1201
D29 0.001
0.1
SB07-03C
R185
C173
12
0.001
R181 R186 R196
68 12 6.8 Q33
C169
B_DET 2SB1132
0.01
R182
1.2k
R197 Q35
R189 6.8
UNR9213J
D28 1k
MA2S111
C170 R184
D36
0.1 82
MA133
CPU3V
Q32
R187
2SC4617 1k
R180
Q34 UNR9215J
B_AF_THURU
47k
B_AIN
B_AMUTE R188
150
AOUT C180
CHGC
0.001
BEEP
A_AIN CHGS
HVDET
Q29 D32 D33 R13
MA8027 120k
MA2S111 (HJ9)
UNR9213J
+3V
+3V
1
SUB_3C SUB_3C
2
VOL_UP_DOWN VOL_UP_DOWN to REC
3
unit
SQL SQL
C171 4
TXD (CPU_TX) J7
0.01 TXD
A_DET 5
RXD RXD (CPU_RX)
6
C193
(HJ8)
0.1
AOUT AOUT
1
to REC
A_AIN A_AIN
2
B_AIN unit
B_AIN
3
C172 J6
GND
0.1 4
AFOUT
AFOUT
AFOUT
EXT SP
R57 JPW
J3
EP6
AFOUT
+3V
J8
AFOUT
2 4
INT SP
GND
1 3
C37 C33
47p 0.001