![background image](http://html1.mh-extra.com/html/icom/ic-r20/ic-r20_service-manual_3569421040.webp)
Aug. 2009
20
• 1STAVCO BOARD
(TOP VIEW)
• 2NDCVCO BOARD
(TOP VIEW)
• DOWNCONV BOARD
(TOP VIEW)
• 2NDDVCO BOARD
(TOP VIEW)
• 1STBVCO BOARD
(TOP VIEW)
The combination of this page and next page shows
the top side and bottom side of actual P.C. board.
J1
A_R3V
GND
APS
C_VCO_OUT
GND
to RF UNIT HJ5
1
5
J2
OSC
GND
+3V
PLLCK
PLLDATA
PLLDSTB
to RF UNIT HJ4
6
1
J1
B R3V
GND
BPS
D_VCO_OUT
GND
to RF UNIT HJ9
1
5
J2
OSC
GND
+3V
PLLCK
PLLDATA
PLLDSTB
to RF UNIT “HJ8”
6
1
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C24
C40
C54
C55
C56
D1
D2
D3
D4
D7
D8
D9
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
Q1
Q2
Q3
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R36
R37
R38
R54
B6080D
H0
H5
H10
H15
H20
V0
V5
V10
V15
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C24
C25
C26
C27
C28
C29
C30
C45
C54
C55
C56
C57
D1
D2
D3
D4
D5
D7
D8
D9
D10
L1
L2
L3
L4
L5
L6
L7
L8
L9
L10
L11
L12
L13
L14
Q1
Q2
Q3
Q4
Q5
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R36
R37
R38
R39
R54
H0
H5
H10
H15
H20
H25
V0
V5
V10
V15
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C22
C23
C24
C30
C31
C32
C33
D1
J1
J2
L1
L2
L3
L4
Q1
Q3
Q4
R1
R2
R3
R4
R16
R17
R18
R19
R21
B6082D
H0
H5
H10
V0
V5
V10
V15
V20
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C22
C23
C24
C30
C31
C32
D1
J1
J2
L1
L2
L3
L4
Q1
Q3
Q4
R1
R2
R3
R4
R16
R17
R18
R19
R21
B6083D
H0
H5
H10
V0
V5
V10
V15
V20
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C19
C22
C27
C28
C29
C30
C31
C32
C34
C35
C36
C37
C38
C39
C40
C41
C42
C43
C56
C58
D1
D3
D5
D6
D7
D8
IC2
IC3
L1
L2
L3
L4
L6
L7
L8
L9
L10
Q1
Q4
R1
R2
R4
R5
R7
R8
R9
R10
R11
R12
R13
R21
R22
R23
R25
R26
R27
R28
R33
H0
H5
H10
V0
V5
V10
V15
V20