Scope Unit - Icom IC-7800 Service Manual Addendum

11-20 SCOPE UNIT

SCOPE UNIT (1)
C
E
Q31
DTC114EU
J1
C35 0.01
SCPA
from RXPLL-A
unit J1301
R14 L32
150 10µ
SSA
F
Q11
DTC114EU
J2
C37 0.01
SCPB
from RXPLL-B
unit J1301
R18 L34
150 10µ
SSB
Q12
DTC114EU
J3
C21
SAD
from RXPLL-B
unit J601 C38 0.01 L33 10µ
0.0047
R35
4.57V
1k
Q32
DTC114EU
A B 7.90V 3.17V
J11 D
C22
SCPT
from MAIN
unit J808
0.0047
Display ON: 0.0V
OFF: 6.67V
J4
AGND
SSA
SSB
SATT
SMUT R53 100 SMUT
+8V L57
T8V T8V
HF50ACC322513
AGND
AGND
+5V L59 HF50ACC322513
+3R3V L60 HF50ACC322513
to MAIN
L52 10µ
-12V
unit J410
+3R3V_
-11.64V
+3R3V_ +3R3V_
AGND
SST2 R73 100 SST2
SPSO R74 100 SPS0
SST1 R75 100 SST1
SCK SCK
R76 100
SDAT R77 100 SDAT
DGND
SYNCIO R72 100 SYNCIO
FRWT R61 100 3VH
R62 100 DX1
DXIS
DFRS R63 100 FSR1
DFXS R64 100 FSX1
SDR1 R65 100 DR1
R66 100 CLKX1
DSPCK
DRES R71 100
DGND
SCOPE
UNIT (2)
SYNCIO
SYNCIO
SDAT
SDAT
SCK
SCK
SST1
SST1
SMUT
SMUT
SPS0
SPS0
SST2
SST2
RESET
RESET
40MHZ
40MHZ
D40M
D40M
S2LO
S2LO
S3LO
S3LO
+3R3VLP L58 HF50ACC322513 +3R3VL
+3R3VLP
+5VLP L55 HF50ACC322513
+5VLP
+8VLP HF50ACC322513
L56
+8VLP
GND
GND
SCOPE
UNIT (3)
RESET
RESET
RESET
RESET
CLKX1
CLKX1
DR1
DR1
FSX1
FSX1
DX1
DX1
FSR1
FSR1
3VH 3VH
3VH
D40M D40M
D40M
+5VLD L54 10µ
+5VLD
+3R3VL +3R3VL
+3R3VL
+2R5V +2R5V
+2R5V
+3R3V_ +3R3V_
+3R3V_
S3IF+
S3IF+
GND
GND
MAIN SUB
A 6.46V 0.0V
SCPA B 0.0V 6.47V
C 0.0V 5.68V
D 5.68V 0.0V
E 2.29V 14.55V
F 14.55V 2.28V
IC1
µPG2009TB
C1
0.0047
2.55V
3 4
C24
OUT2 VCONT2
SCPB
2 5
GND IN
1 6
OUT1 VCONT1 0.0047
C3
C2
0.0047
0.0047
40MHZ
+8V_
IC31
µPG2009TB
3
OUT2 VCONT2
2
GND
1
OUT1 VCONT1
R38
+8V_ +8V_
4.7k
SSA
SSB
ATTV
TX: 7.99V
R36
2.22V
RX: 0.0V
T8V
4.7k
T8V
AGC
3.17V
S2LO
+8V
7.19V
1.41V
C303
S3LO
Q301
0.0047 2SC4673
0.67V
200KHz
SPS0 -10.3V -4.99V
SST2
IC2
R81
-12VL
TA79L05F
40MHZ
100
D40M
I O
G
S2LO
S3LO
D40M
+2R5V
+2R5V
S3IF+
11 - 14
L5
L13 39n L14 0.1µ
LS-484B
C43 82p C45 18p
D2
D1
C9
CPH5513
CPH5513
0.0047
1
5 1 5
4 4
L2 C8 0.0047
2 3 2 3
Q1
2SC4081
10µ L4
2.57V
10µ
R5
R11
RH03ADCJ4X
4.7k
R4
R2
8V
2.2k
1.5k
4.83V
L11
8V
4
10µ
5
IN
6
4.68V
Q33
DTC114EU
TX: 0.00V
RX: 3.28V
AGC
S2LO
D4
L302 L301
R207
HSB88WS
LR-395 LR-395 15
+8V
C301 R303
18p 18
L304
8V
10µ
R402 R403
1k
1k
-5VL -5V -5V
IC401
µPC4094G2
0.0V
R412
10k
L401
33µ C420 R411 R413
R404
270k
0.1 10k
1k
C421
1p
L53
+5V
10µ
+2R5V
ATTV
AGC
S3IF+
C11 L12
1p
0.82µ
L6
0.99V 7.66V
LS-484B
C41 10p L8
C15
LR-442
C14 0.0047
470p
C17
0.0047
C18 R12
5p 100
Q2
R9
2SC5551
1.12V 3.3k
8V
C101 Q101
S2LO
2SC4673
0.0047
0.67V
1.33V
0.0V
C207 5p
L203
LS-484B 7.30V 7.25V
L202
R209
LS-484B
47k
Q202
Q201
2SK882
2SK882
L204
10µ
8V 8V
R414
10k
1.25V
R416
RH03ADCS5X
C425 R418
R417 R419
0.1 39k 12k
-5V
-5V
IC404
µPC4094G2
IC403
µPC4094G2
R421
10k
C427 R420
0.1 15k
R405
R422
1k
10k
R432
0.0V
47k
+5V +5V
+2R5V
ATTV
AGC
S3IF+
MESUREMENT CONDITIONS
Explanatory notes voltage at RX(no instruction)
frequency: 14.1 MHz
mode: J3E(USB)
VOLTAGE LINE
ANT(RX): no input
(TX): no modulation
SCOPE ATT: 0dB
Digital tester
range: input impedance
200mV: 100MΩ
2V: 11MΩ
20V,200V,1000V: 10MΩ
D101
L101 L102
HSB88WS
LR-395
LR-395 R109
18
8V
6.99V
C107 R106
56p 18
L104 0.15µ
C109 120p
8V 8V
L201
LS-471A
0.0V
FI201
FL-357
4 1
C204 GND IN L205
2 3
OUT GND
0.0047 82n
8V
TO ADC IN
S3IF+
15
R430
330k
8V
C430 1 D402 R428
100k
MA2S111
R429
IC405
NJM2904M
56k
R435
100k
R433
100k
R434 D403
100 MA2S111
R437
100k
ATTV
AGC
S3IF+