![background image](http://html.mh-extra.com/html/icom/ic-7800/ic-7800_service-manual_612345170.webp)
TUIN
from/to the CTRL board J251
TUOT
from/to the CTRL board J252
24
to the CTRL board J51
23
2
1
J1
CO2
14M
+15V
VHCO
VHF
VHCI
FANC
GND
3R5M
10M
GND
7M
CI3
GND
CI2
CO1
5M
GND
CI1
+15V
18M
24M
CO3
GND
4
to the TUNER
unit MF3
1
J4
GND
NC
NC
TFAN
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
120
125
130
135
140
145
150
155
160
165
170
175
180
185
190
195
200
205
210
215
220
225
230
235
240
245
250
255
260
265
270
0
Horizontal
5
10
15
0
25
30
35
20
45
50
55
40
65
70
75
60
80
90
95
100
85
V
er
tical
8-28 NETWORK BOARD
• TOP VIEW
8 - 33