Icom IC-R20 Service Manual page 55

The combination of this page and the previous page
shows the unit layout in the same configuration as the
actual P.C. Board.
to RF UNIT HJ11
1 6
DOWNCONV BOARD
• BOTTOM VIEW
J2
J1
1 8
to RF UNIT HJ10
2NDCVCO BOARD
• BOTTOM VIEW
2NDDVCO BOARD
• BOTTOM VIEW
1STAVCO BOARD
• BOTTOM VIEW
8 A_VCO_OUT
GND
GND
J2
A_VCO3
A_VCO2
A_VCO1
A_R3V
1 +3V
to RF UNIT HJ2
1STBVCO BOARD
• BOTTOM VIEW
8 B_VCO_OUT
GND
B_VCO4
J2
B_VCO3
B_VCO2
B_VCO1
B_R3V
1 +3V
to RF UNIT HJ6
to RF UNIT HJ3
J1
to RF UNIT HJ7
J1
9 - 8
OSC 7
APS
PLLCK
PLLDATA
PLLASTB
GND
VP 1
OSC 7
BPS
PLLCK
PLLDATA
PLLBSTB
GND
VP 1