Icom ic-r20 Service Manual page 97

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