Icom IC-7800 Service Manual Addendum page 319

Jul. 2008
SCOPE UNIT (3)
D40M
RESET
+3R3L
1.29V
D201
+3R3V_
1SR154
IC201
SI-3012KS
+1R2V
IC505
2.49V
AD1582BRT
+3R3L
I O
ADJ
+2R5V
+5VLD
3.21V
L502
R500
0
SCOPE
UNIT (1)
48
NC
47
NC
46
D40M
NC
45
RESET
NC
44
RESET
NC
S3IF+ 43
IN+
42
NC
41
NC
40
NC
GND 39
IN-
38
REFGND
+2R5V 37
+3R3V_
REF
+3R3L
+5VLD
S3IF+
GND
0.0V
RESET
3VH
3VH
CLKX1
CLKX1
DR1
DR1
FSX1
FSX1
DX1
DX1
FSR1
FSR1
+2R5V
+2R5V
+3R3L
+1R2V
D40M
RESET
R622
0
+3R3L
J671
1 32
A11
2 31
A9 A10
3 30
A8
+1R2V 4 29
A13
5 28
A14
6 27
7 26
8 25
IC671
9 24
AT49BV001AN-55TI
A16 10 23
A15 11 22
A12 12 21
A7 13 20 A0
A6 14 19 A1
A5 15 18 A2
A4 16 17 A3
+1R2V
Explanatory notes
+2R5V VOLTAGE LINE
MESUREMENT CONDITIONS
voltage at RX(no instruction)
frequency: 14.1 MHz
mode: J3E(USB)
ANT(RX): no input
(TX): no modulation
SCOPE ATT: 0dB
Digital tester
range: input impedance
R501
5VD
100 3.1V
0.4V
13 R503 10k IC604 3VH
D4/EXT/INT 14
TC7SH04FU
R504 10k
D5/INVSNC 15
R505 10k 5 1
D6/INVSCLK 16
R506 10k 2 TOUT1
D7/RDC/SDIN 17
4 3
OGND 18
IC501
OVDD 19
AD7650AST 5VD C665 0.1
DVDD 20
DGND 21
DR0
D8/SDOUT 22
CLKX0 CLKX0
D9/SCLK 23
FSX0
D10/SYNC 24
D11/RDERROR
DR0
FSX0
R507
100
5 1
2
RESET 4 3
IC502
TC7S04FU CNVST
DVDD
3VH
CLKX1
DR1
FSX1
DX1
FSR1
+3R3L
+1R2V
70
D40M
40M
RESET
DVDD
D7
D6
D5
D4
D3
D2
D1
D0
Y18
EA20
W17
EA19
A16 Y16
EA18
A15 V16
EA17
A14 Y15
EA16
A13 W15
EA15
A12 Y14
EA14
A11 W14
EA13
A10 V14
EA12
A9 W13
EA11
A8 V10
EA10
A7 Y9
EA9
A6 V9
EA8
A5 Y8
EA7
A4 W8
EA6
A3 V8
EA5
A2 W7
EA4
A1 V7
EA3
A0 Y6
EA2
N3
ED31
P3
ED30
P2
ED29
P1
ED28
R2
ED27
R3
ED26
T2
ED25
T1
ED24
U3
ED23
U1
ED22
U2
ED21
V1
ED20
V2
ED19
Y3
ED18
W4
ED17
V4
TMS320C6711DGDP200
ED16
T19
ED15
T20
ED14
T18
ED13
R20
ED12
R19
ED11
P20
ED10
P18
ED9
N20
ED8
D7 N19
ED7
D6 N18
ED6
D5 M20
ED5
D4 M19
ED4
D3 L19
ED3
D2 L18
ED2
D1 K19
ED1
D0 K18
ED0
TOUT1 F1
TOUT1
40M R635 F2
TINP1
3VH 47 G1
TOUT0
R609 10k G2
TINP0
E1
CLKS1
M1
CLKR1
CLKX1 L3
CLKX1
DR1 M2
DR1
FSX1 L2
DX1
DX1 M3
FSR1
FSR1 L1
FSX1
40M K3
CLKS0
R636 47 H3
CLKR0
CLKX0 G3
CLKX0
DR0 J1
DR0
H2
DXO
J3
FSR0
FSX0
DVDD
+3R3L
FI501
EXCCET103U
VSS
+3R3L
+3R3L
+1R2V
D40M
IC607
40M
R3111N111A
1
OUT
2
VDD
3
VSS
GND1
VSS
DVDD DVDD
40M
CVDD
VSS
M12
VSS
M11
VSS
M10
VSS
M9
VSS
L12
VSS
L11
VSS
L10
VSS
L9
VSS
K12
VSS
K11
VSS
K10
VSS
K9
VSS
J12
VSS
J11
VSS
J10
VSS
J9
VSS
Y19
VSS
Y13
VSS
Y2
VSS
Y1
VSS
W20
VSS
W16
VSS
W11
VSS
W5
VSS
W1
VSS
U20
VSS
U17
VSS
U13
VSS
U9
VSS
U8
VSS
U4
VSS
T17
VSS
T4
VSS
IC601 P19
VSS
P17
VSS
P4
VSS
N17
VSS
N4
VSS
M17
VSS
M4
VSS
K20
VSS
K2
VSS
J4
VSS
H17
VSS
H4
VSS
G17
VSS
G4
VSS
F19
VSS
E17
VSS
E4
VSS
E2
VSS
D17
VSS
D13
VSS
D8
VSS
D4
VSS
C9
VSS
C8
VSS
B20
VSS
B15
VSS
B11
VSS
B4
VSS
B1
VSS
A20
VSS
A19
VSS
A14
VSS
A11
VSS
A2
VSS
A1
VSS
DVDD
CVDD
VSS
+3R3L +3R3L
+3R3L
+1R2V
D40M
DVDD
5
NC
4
NC
VSS
IC602
SN74LVC1G04DCK
4 3 4
3
2
2
5 1 5
1
IC603
SN74LVC1G04DCK
R610
1M
L552
+3R3L
L551
SLF6028T
+3R3L
+3R3L
+1R2V