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60
SW-A BOARD
VOLTAGE LINE
Explanatory notes
to DISPLAY
board J3
to VR-B
board J1
to VR-C
board J1
470
R2
680
R3
470
R4
470
R6
470
R7
470
R8
470
R9
470
R10
470
R11
470
R12
2.2k
R13
4.7k
R14
2.2k
R15
4.7k
R16
2.2k
R17
4.7k
R18
2.2k
R22
4.7k
R23
15k
R24
2.2k
R25
4.7k
R26
0.1
C6
0.1
C7
S21 LS8J2M
15k
R29
S11 LS8J2M
470
R30
SML-512MW
DS17
SML-512DW
DS5
SML-512MW
DS6
SML-512MW
DS7
SML-512MW
DS8
SML-512MW
DS9
SML-512MW
DS10
SML-512MW
DS11
SML-512MW
DS12
SML-512MW
DS13
SML-512MW
DS14
SML-512UW
DS15
SML-512MW
DS16
S1 LS8J2M
S2 LS8J2M
S3 LS8J2M
S4
LS8J2M
S5 LS8J2M
S6 LS8J2M
S7 LS8J2M
S8 LS8J2M
S12 LS8J2M
S13 LS8J2M
S14 LS8J2M
S15 LS8J2M
S16 LS8J2M
S17 LS8J2M
S18 LS8J2M
S19 LS8J2M
S20 LS8J2M
TN1D
TRAK
MA
GD
VOXD
VOXD
TN2D
KI11
KI11
PWRD
PWRK
STBD
MOND
MOND
TMD
TMD
MNRD
KI10
MNBD
SA
GD
KI9
KI9
SNRD
SNBD
KI8
KI7
KI7
POWER SW
STBY LED
POWER ON LED
TUNING LED
TUNER LED
TRANSMIT SW
TIMER LED
TIMER SW
VOX BK-IN SW
TUNER SW
MAIN
AGCVR SW
MAIN
NR SW
MAIN
NB SW
SUB
AGCVR SW
SUB
NR SW
NB SW
SUB
MONI SW
6.8k
R19
6.8k
R20
6.8k
R21
0.1
C1
0.1
C2
0.1
C3
6.8k
R27
6.8k
R28
0.1
C4
0.1
C5
0.1
C8
0.1
C9
J3
LDPS
LDPS
LDPS
LDPS
LDPS
LDPS
LDPS
LDPS
LDPS
LDPS
LDPS
LDPS
VOXD
PWRL
SAGD
SAGL
PWRK
GND
KI10
KI8
TN1D
MAGD
MSQL
SNRD
DELL
TRAK
3R3V
3R3V
3R3V
3R3V
3R3V
KI7
TN2D
MNRD
MAGL
SNBD
KI11
SSQL
GND
KI9
KI10
KI8
KI7
KI11
KI9
TMD
MNBD
MIGL
KYSL
GND
NC
GND
NC
NC
NC
NC
NC
MOND
STBD
PWRD
J1
PWRL
MIGL
NC
MAGL
MSQL
GND
GND
GND
GND
3R3V
J2
DELL
KYSL
NC
SAGL
SSQL
3R3V
GND
GND
GND
GND
A
B
C
D
E
F
G
SW-A BOARD
OFF
TUNER SW
TIMER SW
VOX BK-IN SW
MONI SW
3.30V
0.000V
0.807V
1.662V
2.52V
OFF
E
F
G
3.30V
0.000V
0.799V
1.657V
OFF
A
B
C
3.30V
0.000V
0.807V
1.663V
D
2.52V
range : input impedance
200mV : 100M
Ω
2V : 11M
Ω
20V,200V,1000V : 10M
Ω
MESUREMENT CONDITIONS
voltage at RX
frequency : 14.1 MHz
mode : J3E(USB)
Digital tester
ANT(RX) : no input
3.30V
OFF
MAIN AGCVR SW
MAIN NR SW
MAIN NB SW
3.30V
0.000V
0.788V
1.664V
OFF
MAIN AGCVR SW
MAIN NR SW
MAIN NB SW
3.29V
0.00V
0.791V
1.648V
MIN/MAX
8.21
㨪
3.31V
7.22V
ON : 0.0V
OFF : 3.29V
VR-B BOARD
VOLTAGE LINE
Explanatory notes
to SW-A
board J1
4.7k
R6
0.0047
C2
4.7k
R3
4.7k
R5
4.7k
R4
0.0047
C1
0.0047
C4
0.0047
C3
J1
RV-317
R1
VR-B BOARD
RV-317
R2
PWRL
MIGL
NC
MAGL
MSQL
GND
GND
GND
GND
3R3V
MIC/PWR VR
MAIN AGC/SQL VR
MIN/MAX
0.0V/3.29V
3.31V
range : input impedance
200mV : 100M
Ω
2V : 11M
Ω
20V,200V,1000V : 10M
Ω
MESUREMENT CONDITIONS
voltage at RX
frequency : 14.1 MHz
mode : J3E(USB)
Digital tester
ANT(RX) : no input
VR-C BOARD
VOLTAGE LINE
Explanatory notes
to SW-A
board J2
0.0047
C2
0.0047
C1
4.7k
R3
0.0047
C4
4.7k
R4
4.7k
R5
4.7k
R6
0.0047
C3
J1
RV-317
R1
VR-C BOARD
RV-317
R2
KYSL
DELL
SSQL
SAGL
GND
GND
GND
GND
3R3V
NC
SUB AGC/SQL VR
KEY/DELAY VR
MIN/MAX
0.0V/3.29V
3.31V
range : input impedance
200mV : 100M
Ω
2V : 11M
Ω
20V,200V,1000V : 10M
Ω
MESUREMENT CONDITIONS
voltage at RX
frequency : 14.1 MHz
mode : J3E(USB)
Digital tester
ANT(RX) : no input
VR-A BOARD
VOLTAGE LINE
Explanatory notes
TX LINE
RX LINE
to MAIN
unit J440
to JACK
board J1
to MIC
board J2
to DISPLAY
board J6
J4
VR-A BOARD
RV-308
R1
RV-308
R2
RV-308
R3
RV-308
R4
4.7k
R11
4.7k
R12
4.7k
R13
4.7k
R14
4.7k
R15
4.7k
R16
4.7k
R17
4.7k
R18
0.0047
C11
0.0047
C12
0.0047
C13
0.0047
C14
0.0047
C15
0.0047
C16
0.0047
C17
0.0047
C18
J3
J2
GND
MNBL
MNRL
SNBL
SNRL
MAFL
MRFL
SRFL
SAFL
M8V
MSND
PHI
MUD
SQLS
DOT
GND
GND
DASH
MICI
MICI
GND
MICE
PHOS
MICE
GND
AFO
PHOM
PHOM
AFO
PHOS
PHE
PHE
PHE
AFE
PHE
3R3V
3R3V
PHE
MAIN NR
SUB NR
MAIN NB
SUB NB
SUB RF
SUB AF
MAIN AF
MAIN RF
J1
0
R21
0
R22
0
R23
0
R24
0
R25
MUDL
SRFL
SNBL
M8V
GND
MAFL
MNRL
3R3V
MRFL
MNBL
DOTK
SQLS
MSND
SAFL
SNRL
SNRL
SAFL
MRFL
MUD
DA
S
H
SQLS
MSND
M8V
PHI
MAFL
DO
T
SNBL
MNRL
MNBL
3R3V
SRFL
DSHK
PHNI
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
MUD
SRFL
SNBL
M8V
MAFL
MNRL
3R3V
MRFL
MNBL
DOT
SQLS
MSND
SAFL
SNRL
DASH
PHI
0
R26
0
0
R27
R28
EP20
EP19
EP18
EP17
EP16
EP15
EP14
EP13
EP12
EP5
EP3
EP2
EP10
EP11
EP21
EP8
EP7
EP6
EP9
MIN/MAX
0.0V/3.29V
3.31V
range : input impedance
200mV : 100M
Ω
2V : 11M
Ω
20V,200V,1000V : 10M
Ω
MESUREMENT CONDITIONS
voltage at RX
frequency : 14.1 MHz
mode : J3E(USB)
Digital tester
ANT(RX) : no input
JACK BOARD
Explanatory notes
RX LINE
to VR-A
board J3
0.0047
C101
0.0047
C102
0.0047
C3
EP101
HF50ACC322513
L2
0.0047
C2
EP102
0.0047
C1
J102
10
R2
HF50ACC322513
L3
10
R1
J1
HF50ACC322513
L1
100
μ
L5
100
μ
L6
100
μ
L4
J2
JACK BOARD
PHOM
DASH
DASH
DOT
DOT
PHE
PHE
PHE
PHOS
GND
GND
GND
PHI
PHI
PHONE-J
ELEC-KEY-J
100
μ
L101
100
μ
L102
100
μ
L103
range : input impedance
200mV : 100M
Ω
2V : 11M
Ω
20V,200V,1000V : 10M
Ω
MESUREMENT CONDITIONS
voltage at RX
frequency : 14.1 MHz
mode : J3E(USB)
Digital tester
ANT(RX) : no input
3.30V
MIC BOARD
VOLTAGE LINE
Explanatory notes
TX LINE
to VR-A
board J4
J1
MIC BOARD
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
0.0047
C1
47p
C8
HF50ACC322513
L4
0.0047
C3
100p
C4
0.0047
C5
0.0047
C6
0.0047
C2
0.0047
C7
J2
100
μ
L1
100
μ
L2
100
μ
L3
GND
GND
GND
MICE
AFO
MSND
MSND
SQLS
MUD
M8V
M8V
MICI
GND
AFO
EP4
EP11
EP5
EP9
EP7
EP8
EP2
EP3
EP6
EP10
3.30V
range : input impedance
200mV : 100M
Ω
2V : 11M
Ω
20V,200V,1000V : 10M
Ω
MESUREMENT CONDITIONS
voltage at RX
frequency : 14.1 MHz
mode : J3E(USB)
Digital tester
ANT(RX) : no input
VR-D BOARD
VOLTAGE LINE
Explanatory notes
to DISPLAY
board J5
J1
R1
R2
R3
R4
R5
RK097111T005A
RK097111T005A
RK097111T005A
RK097111T005A
RK097111T005A
RK097111T005A
RK097111T005A
R6
R7
4.7k
R11
4.7k
R12
4.7k
R13
4.7k
R14
4.7k
R15
4.7k
R16
4.7k
R17
0.0047
C11
0.0047
C12
0.0047
C13
0.0047
C14
0.0047
C15
0.0047
C16
0.0047
C17
3R3V
3R3V
3R3V
VR-D BOARD
3.3V
BRIL
CNTL
AVXL
VOXL
DRVL
CMPL
MONL
GND
GND
MONI GAIN
COMP
DRIVE
VOX GAIN
ANTI VOX
CONTRAST
BRIGHT
MIN/MAX
0.0V/3.30V
3.30V
range : input impedance
200mV : 100M
Ω
2V : 11M
Ω
20V,200V,1000V : 10M
Ω
MESUREMENT CONDITIONS
voltage at RX
frequency : 14.1 MHz
mode : J3E(USB)
Digital tester
ANT(RX) : no input
SW-B BOARD
to DISPLAY
board J4
J1
SW-B BOARD
S1 LS8J2M
S2 LS8J2M
S3 LS8J2M
S4 LS8J2M
S5 LS8J2M
S6 LS8J2M
S7
LS8J2M
S8 LS8J2M
S9 LS8J2M
S10 LS8J2M
S11 LS8J2M
S12 LS8J2M
S13 LS8J2M
S14 LS8J2M
S15 LS8J2M
S16 LS8J2M
S17 LS8J2M
F2K
F3K
F4K
F5K
F6K
F7K
MATK
PLYK
RECK
F1K
GND
F1K
F2K
F3K
F4K
F5K
F6K
F7K
SSBK
SSBK
CWK
RTYK
AMK
DATK
MSCK
EXTK
CWK
RTYK
AMK
DATK
MSCK
EXTK
RECK
PLYK
MATK
F-1
F-2
F-3
F-4
F-5
F-6
F-7
SSB
CW
RTTY/PSK
AM/FM
DATA
M.SCOPE
EXIT/SET
REC
PLAY
AUTO TUNE MAIN
range : input impedance
200mV : 100M
Ω
2V : 11M
Ω
20V,200V,1000V : 10M
Ω
MESUREMENT CONDITIONS
voltage at RX
frequency : 14.1 MHz
mode : J3E(USB)
Digital tester
ANT(RX) : no input
ON
PLYK,MATK
MSCK,EXTK,RECK,
RTYK,AMK,DATK,
F7K,SSBK,CWK,
F4K,F5K,F6K,
F1K,F2K,F3K,
OFF
0.00V
3.28V
Jul. 2008
Summary of Contents for IC-7800
Page 1: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 65 VOLTAGE DIAGRAM 67 Dec 2009 ...
Page 79: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 60 VOLTAGE DIAGRAM 64 Feb 2009 ...
Page 157: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 57 VOLTAGE DIAGRAM 59 Aug 2008 ...
Page 245: ...SERVICE MANUAL ADDENDUM CONTENTS PARTS LIST 1 BOARD LAYOUTS 57 VOLTAGE DIAGRAM 59 Jul 2008 ...
Page 333: ...THE TRANSCEIVER i7800 SERVICE MANUAL S 14015HZ C1 2 Mar 2006 ...
Page 555: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 14015HZ C1 2 C 2004 2006 Icom Inc ...