Icom ic-r20 Service Manual page 41

Aug. 2009
• DOWNCONV BOARD
(BOTTOM VIEW)
C15
Q3
Q5
R14
C16
C14
C55
R17
C21
C54
C18
C50
C26
C52
R6 C48
L11
D2
C53 R32
R3 R29
J1
8
1
•2NDCVCO BOARD
(BOTTOM VIEW)
C-VCO
R10
1 6
R9 C17
J2
C18
C21
R15
R22 C16
•2NDDVCO BOARD
(BOTTOM VIEW)
D-VCO
R10
R9 C17
C18
C21
R15
R22 C16
•1STAVCO BOARD
(BOTTOM VIEW)
C50
R44 R42
R45
R23
C53 C47
C61
C67
C44
C46
R34
R30
8 A_VCO_OUT
GND
C66
GND
R25
A_VCO3 J2
A_VCO2
C37
J2
A_VCO1
A_R3V
1 +3V
•1STBVCO BOARD
(BOTTOM VIEW)
C50
R42
R23
C49 C61
R40
R34
C41
R30
R29
8 B_VCO_OUT
B6081E
GND
B_VCO4
C67
J2
B_VCO3
B_VCO2
J2
B_VCO1
C37
B_R3V
1 +3V
The combination of this page and next page shows
the top side and bottom side of actual P.C. board.
R49
R48
C60
R55
R56
R57
C63
R52
C41
R51 OSC
APS
J1 PLLCK
PLLDATA
PLLASTB
GND
VP 1
C48
C59
C31
R47
R53
R55
R56
R57
C63
C68
C62
OSC
BPS
J1
PLLCK
R35
PLLDATA
C40 PLLBSTB
GND
R28
VP 1
J1
C48
21
7
7