Icom IC-R20 Service Manual

9 - 3
The combination of this page and the next page shows
the unit layout in the same configuration as the actual
P. C. Board.
GND
SUB_3C
VOL_UP_DOWN
SQL
TXD
RXD
1
6
to REC UNIT J7
HJ9
J9
DC
from the external
DC power supply
J6
J3
B DIAL
A DIAL
AOUT
A_ATN
B_ATN
GND
1
4
to REC UNIT J6
HJ8
CP2
CP4
CP1
CP3
Li-ion Battery
EXT SP/CI-V
from the
external speaker
LCD
J5
1
40
20
21
LD2
+3S
GND
B_VCO2
B_VCO3
B_VCO4
PLLCK
PLLDATA
STR2
HFC
B1C
B2C
B3C
D
CLK
LD1
EAR
A_VCO1
A_VCO2
GND
B_DET
B_R3V
GND
B_NOISE
B_RSSI
+3V
GND
PLLBSTB
PLLDSTB
VP
GND
PLLESTB
PLLCSTB
PLLASTB
RFO
A_DET
A_R3V
GND
A_NOISE
A_RSSI
to RF UNIT J1
+
–
9-2 LOGIC UNIT
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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)