Icom IC-M803 - DSC OPERATION; Receiving Distress Calls

The actual configuration of the PC board can be seen by viewing the top and bottom BOARD LAYOUT pages together.
See the PARTS LIST H/V location on the PARTS LIST for location details.
8-4
1
MP7701
RL7722
RL7721
J7751
J7721
J7711
J7701
J7761
B9008C
C7891
C7791
C7763
C7762
C7761
C7753
C7741
C7735 C7734C7733
C7732
C7731
C7730
C7729
C7728
C7727
C7726
C7725
C7724C7723
C7722
C7721
C7720
C7717
C7716
C7715
C7714 C7713
C7712
C7711
C7709
C7708
C7707
C7706
C7705
C7704
C7703
C7702
C7701
R7792
R7791
R7766
R7765 R7764 R7763 R7762 R7761
R7755
R7754
R7753
R7752
R7751
R7749
R7740 R7739
R7748
R7747
R7746
R7744
R7742
R7741
R7738
R7737
R7736
R7734
R7733
R7732
R7731
R7730
R7729
R7728 R7727 R7726 R7725
R7724
R7723
R7722
R7721
R7714
R7713
R7712
R7711
R7705
R7704
R7703
R7702
R7701
D7722
D7721
Q7792 Q7791
Q7751
Q7731
Q7724
Q7723
Q7722
Q7721
L7722
L7721
L7702
L7701
J7761
J7701
IC7791
IC7751
IC7741
IC7731
IC7723
IC7721IC7722
IC7703
IC7702
IC7701
FI7701
EP7891
EP7763
EP7762
EP7761
EP7701
D7751
D7747
D7746
D7731
D7724D7723
D7711
C7710
H0H5H10H15H20H25H30H35H40H45H50H55H60H65H70H75H80H85H90H95H100H105
V0 V5 V10 V15 V20 V25 V30 V35
J7761
[GPS-DATA]
[REMOTE] [AF/MOD]
1
14V
NC
GND
DSEN
DSAF
DSAFE
DSMD
DSMDE
GND
GND
GND
GRX
GTX
GRESL
GND
H3R3V
A5V
GND
GND
GND
GND
RPC
DTR
NMR
PNMEO
RSS
DNMEI
RNMEI
GND
GND
• CONNECT UNIT (B-9008C: TOP VIEW)