Icom IC-7400 Service Manual page 61

• PA UNIT
(BOTTOM VIEW)
• S-LOGIC UNIT
(BOTTOM VIEW)
J501
10 5VL
PB1A 9
PB1A
to PBT MCHA
MCHB
board J1 PB2A
PB2B J303
GND
2 GND
GND 1 1 CFL-
NC
to DISPLAY
NC
board DS1002
4 CFL+
J502
10 GND
GND 9
GND
GND
to RIT board J1 GND
GND
GND
RDN
2 5VL
RUP 1
7
J604
1
1 5VL
MUP
MDN
GND
4
14
to MAIN DIAL
• RF UNIT
(BOTTOM VIEW)
J302
GND
22
GND 21
GND
PB2B
PB2A
KIOI
TRAK
TUNK
ANTK
to DISPLAY
NRK
APFK
board J1002
DOTK
DSHK
MUD
KYSL
RITL
PWRL
MIGL
to DISPLAY board J1001 APFL
NRL
22 2 RFL
2
AFL 1
J301
1
21
2 22
J601
to MAIN
unit J180
1 21
9 - 2
The combination of top side and bottom side of this
page shows the actual confi guration of P.C. board.
J507
1 GND
GND 2
GND
DOT
DASH
PHNL
GND
PAFE
9 PAFO
PAFE 10
to PHONE board J3
J508
1 MIC
M8V 2
MUD
SQLS
MSEND
GND
MMICE
PAFO
9 NC
NC 10
to MIC board J2