Icom IC-7800 Service Manual page 146

8-16 LOGIC UNIT
• TOP VIEW
J812 J824 J823
12 1 2 1 1 2
to the BPF unit J1
to the CHASSIS
to the PA
unit SP1
unit MF1
125
120
115
110
105
100
95
90
85
80
8 7
9 8
14 1
75
16 1
16 9
8 5
70
1 8
65
1 4
60
55
MP103
50
45
40
35
30
25
20
15
10
5
0
0 5 10 15 20 25 30 35 40
J822 J825 J807
1 2 8 1 50
to the SCOPE unit J910
to the MAIN
unit J142
J2
1 +3R3V +3R3V 40
CE01 +3R3V
CE00 CE11
CE02 CE10
CE21 CE12
J1
1 +3R3V +3R3V 30 CE20 CE31
+3R3V A22 CE22 CE30
A21 A20 VPEN CE32
A19 A18 RP# WE#
OE# STS
A17 A16
D15 D7
A15 A14
A13 A12 D14 D6
A11 A10 D13 D5
A9 A8 D12 D4
A7 A6 D11 D3 J820
A5 A4 D10 D2
A3 A2 D9 D1
A1 A0 D8 D0
GND BYTE#
A23 GND
1
15 GND GND 16 20 GND GND 21
to the DC-DC unit J4
to the MEMORY board J1 to the MEMORY board J2
27 1
28 54
45 50 55 60 65 70 75 80 85 90 95
to the CF board J1
8 - 9
J821 J805
10 1 7
20 1
to the DISPLAY board J203
to the DC-DC unit J3
9
16
100 105 110 115 120 125 130 135 140 145 150
Horizontal
J810 J826 J802
1 1 13
1 4 1
to the MAIN unit J451 to the MAIN to the SCOPE unit J907
unit J901
1 39 1
J809 J808
2 40 2
to the MAIN unit J900 to the MAIN unit J940
19 1
J813
20 2
to the DIGISEL unit J10
5 4
8 1
48
1
12
13
8
8 7
14 1
1
155 160 165 170 175 180 185 190 195 200 205
2 22
J806
J816
1
9
to the DISPLAY board J202
1 21
to the RXPLL-A unit J2
39
40
J811
1 GND
GNDL 2
IKEY
ISTA
GNDL
TDRS
GND
TCK
TDAT
CSTB
FSTB
TOE
GND
REFV
FORV
T8V
+3R3V
-12V
GND
GND
GND
+15V
23 +15V
+15V 24
to the CTRL board J1
J814
10 GND
OCK 9
ODAT
OCS
OSS2
OSS1
P+8V
P+15V
2 P+15V
GND 1
to the OSC unit J2
J815
1 GND
P+15V 2
P+15V
R8V
T8V
P+5V
P+5V
GND
GND
PSLB
PSTB
C2B2
C2B1
GND
GND
PCKB
PDATB
GND
GND
DRES
21 UNLKB
GND 22
to the RXPLL-B unit J2
J803
GND 1
37
RED
36
RGND
GREEN
GGND
BLUE
25
BGND
24
HC
SGND
VSYNC
GND 11
to the SCOPE
unit J909
J804
1 5
to the SCOPE
unit J908
210 215 220 225 230 235
40