![background image](http://html1.mh-extra.com/html/icom/vhf-marine-transceiver-ic-m501euro/vhf-marine-transceiver-ic-m501euro_service-manual_2038216031.webp)
9 - 3
9-2 MAIN UNIT
• TOP VIEW
1
25
26
50
1
1
1
1
4
4
4
8
8
8
5
5
5
7
14
8
51
75
76
100
1
8
16
9
1
1
10
20
11
4
8
5
for FLASH
1
2
9
10
J1
GND
TMODE
TRES
SOT0
GND
DTV
TAUX3
P01
SIN0
SCK0
1
9
2
to OPTION UT-98 or UT-112
10
J6
+5V
GND
OPTIN
SCON
GND
GND
GND
SCK
SDATA
OPSTB
MICI
DETI
MICO
DETO
W1
to VR unit J1
GND
VOL1
VOL2
from DSC unit J3
1
13
14
2
J3
GND
DMDA
CMDA
VCC
DSCMOD
GND
MICG
ICF3
MDDA
MCDA
D5V
VCC
SAFO
SMIC
from LOGIC unit J4
1
13
14
2
J4
HVS
MLDA
8V
GND
GND
SP
–
SP
–
HV
LMDA
VPP
SRESET
D5V
SP+
SP+
1
8
to HM-126 J1
J7
SPMIC
AF2
GND
MIC
MICE
HANG
PTT
AF1
EXT SP
1
2
J8
AFG
AF