Icom ic-r20 Service Manual page 46

Aug. 2009
R46
C31
0.01 1k
3.0V
R48
C60
2.3V 1k
0.01
R47
C59
1k
0.01
R49
180k
IC3
MB15T61UL
Q13
20
GNDOSC
21
SWA2
2SC5277 D2-E
22
C40
SWB2
23
0.01 GNDDIG
24
SWA1
R28
15k
C38 R24 R23
0.68 3.3k 1k
C39
C35
0.68
0.0033
R26 R25
6.8k 220
Q7
2SC4117 BL F Q6
C37
R27
1
8.2k
2SK880 GR F
R35
2.7k
1AVCO
R1
C48
47
C3
0.01
3p
L1 D2 C2 L3 L4 C7
0.22µH 1SV245 F 0.001 15nH 1µH
0.5p
Q1
R2
C4
2SC5006 4p 220
C1 D1 L2 R3
0.001 1SV245 F 0.22µH
4.7k
C5 C6 R4
0.001 0.1 8.2k
2AVCO
R6
47
C16
L7
L5
C10 L6 C14
3p
0.22µH 1µH
0.001 18nH 0.5p
Q2
R7
C11
2SC5006 220
2p
C9 D3
R8
0.001
HVC417C-E
4.7k
C12 C13 R9
0.001 0.1 8.2k
3AVCO
R11
47
C19
8p
R54 L8 C18 L9 L10 C23
1µH
47 0.22µH 0.001 27nH 0.5p
Q3
C20 R12
2SC5006
D4
4p 220
C17
R13
HVC417C-E
0.001
4.7k
C21 C22 R14
0.001 0.1 8.2k
1STAVCO BOARD
R57*
PLLASTB
R56*
PLLDATA
PLLCK
R55*
3.0V
R32 2.6V
150
C62 R52
C61 R50 R51
R30 R31 C44
0.1 0.1 100k 100k 100k
220 82k 0.001
12
FINRF1
11
C41 C42
FINRF2
10
XFINRF 0.001 0.001
9
GNDRF
8 C43
PS
C63 R29
2p
Q8
0.001 100k
2SC5231A 8-E
3.0V
C64
C67*
10
2.8V R53
82
A_R3V
A_VCO1
3.1V A_VCO2
C58
0.1 A_VCO3
Q12
A_VCO_OUT
XP1113
R5
220
3
4
2
C8
C54
0.1
1
0.001 5
R36
4.7k
C66
C65
D7
10
10
1SV308 F
4 3
2
5 1 Q11
XP1113
1.67V 3.0V
R10
220
R45
R33
C53 R44
1k
33
C15 C55 0.001 220
R43
0.1 0.001
82k
R37
C52
4.7k
0.001
D8
R42 C50
1SV308 F
47 5p
Q9
2SC5231A 8-E
R15
330
C24
C56 R41
0.1
15
0.001
R38
4.7k
D9
IC2
C47
1SV308 F
0.001
µPC2746TB
3 GND 4 2.0V
3.0V
OUT 5
2 GND
GND 6
1 IN
VCC
R34
220
C46
0.001
C49
10p
1.13V
R40
4.7k
Explanatory notes
VOLTAGE LINE
26
J1
VP
1
GND
2
to
3
4 RF unit
5 HJ3
APS 2.3V
6
OSC
7
C59
R49 0.01
180k
Q12
2SC5277 D2-E
C40
0.01
R28
15k C38
C39
0.68 0.68
R26
6.8k
J2
+3V R27
1
2SK880 GR F
8.2k
Q7
2
3
to 2SC4117 BL F
4
RF unit
R35
5
HJ2
GND 2.7k
6
GND
7
8
C48
0.01
L1
D2 C2
0.22µH 1SV245 F 0.001
D1
C1 L2
0.001 1SV245 F 0.22µH
L5
0.22µH
C10
0.001
C9 D3
0.001
HVC417C-E
R54 L8 C18
0.22µH 0.001
47
D4
C17
HVC417C-E
0.001
L11 D5
0.27µH HVC417C-E
C25 C26
0.001 0.001 L12
22nH
C31 R46 R57 1k R57*
0.001 1k
R56*
R56 1k
3.0V
R55*
R55 1k
R47
C60
1k
0.01
R48
1k
IC3
C61 C62
MB15T61UL
0.1 0.1
20 12
GNDOSC
FINRF1
21 11
SWA2 FINRF2
22 10
SWB2 XFINRF
23 9
GNDDIG GNDRF
24 8
SWA1 PS
3.0V
R24
R23
3.3k
1k
R53 C64
C35 2.8V
10
0.0033 82
3.1V
R25
220
Q6
C58
C37
0.1
1
C54
0.001
R5*
1BVCO
R1 C8
47 C3
0.1
2p
R36
4.7k
L3 L4 D7
C7
12nH
1µH 0.5p 1SV308 F
Q1
R2
C4
2SC5006 220
2p
R3
4.7k
C6 R4
C5
0.001 0.1 8.2k
R10*
2BVCO
R6 C55
C15
0.001
47 C16 0.1
4p
R37
4.7k
L7
C14
L6
1µH
12nH 0.5p
Q2
C11 D8
R7
2p 220 1SV308 F
2SC5006
R8
4.7k
C12 C13 R9
0.001
0.1 8.2k
R15
470
3BVCO
R11 C56
C24
0.001
47 C19 0.1
8p
R38
4.7k
L10
D9
L9 C23
1µH
27nH 0.5p 1SV308 F
Q3
R12
C20
2SC5006 220
4p
R13
4.7k
C21
C22 R14
0.001 0.1 8.2k
R19 L14
C27
330 47nH
0.75p
4BVCO
R16 C57
C28 C29 R18
R39
0.001
0.75p 6.8k 0.001 6.8k
4.7k
C45
0.5p
Q5
R17
120 2SC5006
Q4
D10
2SC5006 1SV308 F
L13 C30
47nH 0.001
*: Refer to the PARTS LIST for the value and name of component.
J1
VP
1
GND
2
PLLBSTB to
3
PLLDATA RF unit
4
HJ7
PLLCK
5
BPS
6
OSC
7
3.0V
2.6V
R32
150
R50 R51 R52
R30 R31
C44
100k 100k 100k
220
82k 0.001
C41 C42
0.001
0.001
C63 R29
Q8
0.001 100k C43
2p
2SC5231A 8-E
C68*
J2
Q10
XP1113
4 3
+3V
B _ R3V
2
B _ VCO1
5 1 B _ VCO2
to
B _ VCO3 RF unit
HJ6
B _ VCO4
C66 C65
GND
10 10
B _ VCO _ OUT
4 3
2
5 1
Q11
XP1113
C67
10
1.7V 3.0V
R45
C53
R33 R44
1k
0.001 220
33
R43
82k
R42 C50
47 5p C52
0.001
Q9
2SC5231A 8-E
R41
15
IC2
C47
µPC2746TB
0.001
3 4 2.0V
3.0V
GND OUT 5
2
GND GND 6
1
IN VCC
R34
220
C46
0.001
C49
10p
1.13V
Explanatory notes
R40
VOLTAGE LINE
4.7k
1STBVCO BOARD