![background image](http://html1.mh-extra.com/html/icom/ic-r20/ic-r20_service-manual_3569421038.webp)
Aug. 2009
18
The combination of top side and bottom side of this
• REC UNIT
(TOP VIEW)
GND
AOUT
B_AIN
A_ATN
J6
VL DOWN
VL UP
SQL
4
1
USB
+3V
SUB_3C
VOL_UP_DOWN
VBUS
D−
D+
N/C
GND
SQL
CPU_TX
CPU_RX
C1
C2
4
C
3
C
C5
C8
C9
C16
C17
C18
C19
C20
C21
C22
C23
C24
C25
C26
EP1
EP3
EP4
IC1
IC3
IC7
IC8
IC9
IC10
J2
J6
J7
R1
R6
R7
R8
R9
R11
R13
R15
R16
R17
R18
R19
R21
R22
S1
S2
S3
X1
X2
H0
H5
H10
H15
H20
H25
H30
H35
H40
H45
H50
H55
H60
H65
H70
H75
V0
V5
V10
V15
V20
V25
V30
V35
V40
V45
V50