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Icom IC-M803 - DSC OPERATION; Receiving Distress Relay Calls

Icom IC-M803
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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.
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C5549
C5548
C5541
C5526
C5525
C5521
C5506
R5503 R5502
C5508 C5507
C5505
C5503
C5502
C5501
C5492
C5393
C5385
C5371
C5365
C5360
C5357
C5349
C5335
C5334
C5309
C5291C5290
C5241
C5226
C5212
C5181
C5172
C5171
IC4021IC4022
C5170
C5168
C5162
C5157
C5135
C4919
C4914
C4913
C4883
C4692
C4691
C4685
C4669
C4643
C4640
C4636
C4633
C4631
C4432
C4424
C4408
C4388C4387
C4386C4385
C4384
C4382
EP4381EP4382 C4381
C4372
C4371
C4364
C4363
C4362
C4361
C4343
C4342
C4341
C4332
C4331
C4323
C4322
C4304
C4303
C4302
C4301
C4300
C4274
C4273
C4272
C4271
C4266
C4265
C4264
C4263
C4262
C4182
C4181
C4102
C4101
C4075
C4037
C4023
H0H5H10H15H20H25H30H35H40H45H50H55H60H65H70H75H80H85H90H95H100H105H110H115H120H125H130H135H140H145H150H155H160H165H170H175H180H185H190H195H200H205H210H215H220
V0 V5 V10 V15 V20 V25 V30 V35 V40 V45 V50 V55 V60 V65 V70 V75 V80 V85 V90 V95 V100 V105 V110 V115
EP4002 EP4001
J4071J4001
1
PFICL
S13V
FL9M
FL7M
FL5M
FL3M
FL1M
REF
FOR
PFID4V
PFID2V
PDID2V
PPID1V
PDICL
GND
GND
GND
STAT
P14V
P14V
P14V
P14V
PHV
THRM
FL10M
FL8M
FL6M
FL4M
FL2M
GND
GND
GND
PFID3V
PFID1V
PDID1V
PFANV
P8V
GND
GND
ANTC
KEYS
P14V
P14V
P14V
PHV
PON
1
1
J4201
DCKL_P
GND
GND
GND
NC
8V
I5V
I5V
H4V
H3R3V
NC
14V
14V
HV
HV
DCKL_N
GND
GND
GND
GND
8V
A5V
I5V
I5V
H3R3V
H3R3V
14V
14V
14V
HV
FMOD
FMODG
GND
FAF
FAFG
HV
HV
TXD
RXD
GND
1
J4051
GND
DNMEI
RNMEO
DTR
GND
GND
A5V
GND
GTX
GND
GND
DSMD
DSAF
GND
14V
GND
RNMEI
RSS
NMR
RPC
GND
GND
H3R3V
GRESL
GRX
GND
DSMDE
DSAFE
DSEN
NC
J4181
1
[ACC]
[MAINTENANCE]
[EXT-SP]
MAIN UNIT (B-9007B: TOP VIEW)

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