Rf Unit - Icom IC-R20 Service Manual

RF UNIT

• BOTTOM VIEW
to DOWNCONV BOARD J1
8 RF_IN
GND
OSC
PLLCK HJ10
PLLDATA
PLLESTB
GND
1 IF_OUT
to DOWNCONV BOARD J2
6 +3S
+3V
DOWN_CONV HJ11
2GLO
1GLO
GND
1
to 1STBVCO BOARD J2
to 1STBVCO BOARD J1
1 +3V
B_R3V
1
B_VCO1
B_VCO2
B_VCO3
B_VCO4
GND
8 B_VCO_OUT
7
HJ6
HJ2
HJ3
1 +3V
A_R3V 1 VP
A_VCO1 GND
A_VCO2
PLLASTB
A_VCO3
PLLDATA
GND PLLCK
GND APS
8 A_VCO_OUT 7 OSC
to 1STAVCO BOARD J2 to 1STAVCO BOARD J1
to 2NDDVCO BOARD J1
VP
1 5
GND
PLLBSTB
PLLDATA
PLLCK
BPS
OSC
HJ9
HJ7
black
red
The combination of this page and the previous page
shows the unit layout in the same configuration as the
actual P.C. Board.
to 2NDDVCO BOARD J2
1
6
HJ8
green
white
3 1 4 2
EP2
9 - 2
to 2NDCVCO BOARD J2
HJ4
1 6
to 2NDCVCO BOARD J1
HJ5
5 1