Icom IC-R20 Service Manual

9 - 2
The combination of this page and the previous page
shows the unit layout in the same configuration as the
actual P.C. Board.
+3V
A_R3V
A_VCO1
A_VCO2
A_VCO3
GND
GND
A_VCO_OUT
1
8
to 1STAVCO BOARD J2
VP
GND
PLLASTB
PLLDATA
PLLCK
APS
OSC
GND
C_VCO_OUT
APS
GND
A_R3V
1
7
to 1STAVCO BOARD J1
HJ2
HJ3
red
black
green
white
EP2
HJ6
HJ9
RF_IN
GND
OSC
PLLCK
PLLDATA
PLLESTB
GND
IF_OUT
8
1
to DOWNCONV BOARD J1
+3V
B_R3V
B_VCO1
B_VCO2
B_VCO3
B_VCO4
GND
B_VCO_OUT
1
8
to 1STBVCO BOARD J2
HJ7
VP
GND
PLLBSTB
PLLDATA
PLLCK
BPS
OSC
1
7
to 1STBVCO BOARD J1
+3S
+3V
DOWN_CONV
2GLO
1GLO
GND
6
1
to DOWNCONV BOARD J2
HJ10
HJ11
to 2NDCVCO BOARD J1
HJ5
HJ4
HJ8
51
PLLCSTB PLLDATA
PLLCK
+3V
GND
OSC
to 2NDCVCO BOARD J2
1
6
B_R3V
GND
BPS
D_VCO_OUT
GND
to 2NDDVCO BOARD J1
15
OSC
GND
+3V
PLLCK
PLLDATA PLLDSTB
to 2NDDVCO BOARD J2
6
1
2413
RF UNIT
• BOTTOM VIEW

Icom IC-R20 Specifications

General

Mode	AM, FM, WFM, SSB, CW
Antenna Connector	BNC
Memory Channels	1250
Selectivity	AM/FM
Output Power	150mW at 8 Ohms
Battery Life	Approx. 8 hours with BP-206 (at 50mW audio output)