Icom IC-7800 Service Manual Addendum page 305

Jul. 2008
SW-A BOARD
SW-A BOARD
OFF 3.30V Explanatory notes
TUNER SW 0.000V
VOLTAGE LINE
TIMER SW 0.807V
VOX BK-IN SW 1.662V
MONI SW 2.52V
MESUREMENT CONDITIONS
voltage at RX
frequency : 14.1 MHz
mode : J3E(USB)
DS5 SML-512DW
ANT(RX) : no input
STBY LED
Digital tester R2
STBD
range : input impedance
470
DS6 SML-512MW
200mV : 100MΩ
2V : 11MΩ PWRD POWER ON LED
20V,200V,1000V : 10MΩ PWRK
S1 LS8J2M
ON : 0.0V
OFF : 3.29V
POWER SW
3.30V
VOXD VOXD
J1 SML-512MW
R14
3R3V
TRAK
NC
4.7k
S2 LS8J2M
MIGL
PWRL
MAGL
TRANSMIT SW
to VR-B
MSQL
board J1
GND
GND
GND
GND MOND MOND
R3
680
TN1D DS15 SML-512UW
TUNING LED
R4
470
TN2D DS16 SML-512MW
TUNER LED
KI11
S3 LS8J2M
TUNER SW
TMD TMD
DS7 SML-512MW
TIMER LED
R13
KI11
S4 LS8J2M
2.2k
TIMER SW
LDPS
J2
3R3V
NC
KYSL
DS8 SML-512MW DS9 SML-512MW
DELL
SAGL
S6 LS8J2M S5 LS8J2M
to VR-C
SSQL
board J1
GND
GND
GND
GND
MAIN MAIN
AGCVR SW NR SW
R15 R16
2.2k 4.7k
KI9
3R3V 3R3V
OFF 3.30V
MAIN AGCVR SW 0.000V
MAIN NR SW 0.788V
MAIN NB SW 1.664V
VR-B BOARD
VR-B BOARD
R1
3.31V
RV-317
R3
4.7k
R4
MIC/PWR VR
4.7k
MIN/MAX
0.0V/3.29V
Explanatory notes
VOLTAGE LINE
J1
R2
3R3V
RV-317
NC
R5
MIGL
PWRL
4.7k
MAGL to SW-A
MAIN AGC/SQL VR MSQL
board J1
R6
GND
GND
4.7k
GND
MESUREMENT CONDITIONS
voltage at RX GND
frequency : 14.1 MHz
mode : J3E(USB)
ANT(RX) : no input
Digital tester
range : input impedance
200mV : 100MΩ
2V : 11MΩ
20V,200V,1000V : 10MΩ
7.22V
OFF 3.30V
OFF 3.30V A 0.000V
E 0.000V B 0.807V MIN/MAX
8.21 3.31V
F 0.799V C 1.663V
G 1.657V D 2.52V
LDPS LDPS
S14 LS8J2M
A
LDPS
S15 LS8J2M
B
R12
DS12 LDPS
S16 LS8J2M
470
S11 LS8J2M
C
VOX BK-IN SW
S17 LS8J2M
R30
LDPS D KI7
KI8
DS17 SML-512MW 470
KI9
S21 LS8J2M KI10
KI11
KI7
MONI SW
S18 LS8J2M
E
3R3V
S19 LS8J2M
F
S20 LS8J2M
G
LDPS LDPS
DS11 DS13 DS14
DS10 SML-512MW SML-512MW SML-512MW SML-512MW
S7 LS8J2M S8 LS8J2M S12 LS8J2M S13 LS8J2M
MAIN SUB SUB SUB
NB SW NB SW
AGCVR SW NR SW
R17 R18
2.2k 4.7k
3R3V
OFF 3.29V
MAIN AGCVR SW 0.00V
MAIN NR SW 0.791V
MAIN NB SW 1.648V
VR-C BOARD
VR-C BOARD
R1
RV-317 3.31V
R3
4.7k
KEY/DELAY VR
R4
4.7k
MIN/MAX
Explanatory notes
0.0V/3.29V
VOLTAGE LINE
R2
RV-317
R5
4.7k
SUB AGC/SQL VR
R6
MESUREMENT CONDITIONS
4.7k
voltage at RX
frequency : 14.1 MHz
mode : J3E(USB)
ANT(RX) : no input
Digital tester
range : input impedance
200mV : 100MΩ
2V : 11MΩ
20V,200V,1000V : 10MΩ
60
VR-A BOARD
VR-A BOARD
J4
MICI EP20
M8V EP19
MUD EP18
SQLS EP17
MSND EP16
to MIC
GND EP15
board J2
GND EP14
MICE EP13
GND EP12
EP10
AFO
EP11
J3
EP21
GND
GND
NC
LDPS
J2
STBD
MICI
PWRD
MICE
VOXD
PHOS
TN1D
PHE
to MAIN
TN2D
unit J440 PHOM
TMD
PHE
MAGD
AFO
MNRD
AFE
MNBD
SAGD
SNRD
SNBD
TRAK
PWRK J3
MOND
PHE
NC
PHOM
to DISPLAY
NC
PHE
board J3
NC
PHOS
NC PHE
to JACK
NC
PHI EP5
board J1
KI7
GND R27
KI8
DASH 0 EP3
KI9 DOT EP2
KI10
GND
KI11
R28
KYSL
0
DELL
SAGL
SSQL
MIGL
PWRL
MAGL
MSQL MESUREMENT CONDITIONS
3R3V voltage at RX
GND frequency : 14.1 MHz
GND mode : J3E(USB)
Explanatory notes
ANT(RX) : no input
Digital tester
VOLTAGE LINE
range : input impedance
200mV : 100MΩ
TX LINE
2V : 11MΩ
20V,200V,1000V : 10MΩ RX LINE
MIC BOARD
C8
47p C1
0.0047
EP10
J1
1 EP11
7 EP4
1 7 2 M8V EP5
8 AFO EP9
6 GND EP7
2 8 6
3 EP2
4 EP3
5 MSND EP6
3 5
4
EP8
MESUREMENT CONDITIONS
voltage at RX
frequency : 14.1 MHz
mode : J3E(USB)
ANT(RX) : no input
Digital tester
range : input impedance
200mV : 100MΩ
2V : 11MΩ
20V,200V,1000V : 10MΩ
JACK BOARD
J2
PHONE-J
L1 HF50ACC322513
R1 10 L2 HF50ACC322513
L3 HF50ACC322513
R2 10
PHI
3.30V
J1
Explanatory notes
3R3V
RX LINE
NC
KYSL
DELL
SAGL
to SW-A
SSQL
board J2
GND
GND
J102
L101 100μ EP101 DASH
GND
GND
ELEC-KEY-J L102 100μ
EP102 DOT
L103 100μ
GND
VR-D BOARD
J1 VR-D BOARD
NC
3.31V
NC
MIN/MAX
GND
0.0V/3.29V
NC
3R3V 3R3V BRIGHT
MNBL MNBL
MNRL MNRL
SNBL SNBL
SNRL SNRL
MRFL MRFL
CONTRAST
MAFL MAFL
SRFL SRFL
SAFL SAFL
NC
to DISPLAY
NC board J6 ANTI VOX
MUD R21 0 MUDL
NC
DOT R22 0 DOTK
DASH DSHK
R23 0
VOX GAIN
NC
PHI R24 0 PHNI
SQLS R25 0 SQLS
NC
NC
NC DRIVE
NC
NC
NC
MSND MSND
COMP
M8V M8V
3R3V R1
RV-308
R11
MNBL
MONI GAIN
4.7k
MAIN NB
MNRL
R12
MAIN NR
4.7k
R2
RV-308
R13
SNBL
4.7k
SUB NB
SNRL
R14
SUB NR
4.7k
R3
RV-308
R15
MRFL
MAFL MAIN RF
4.7k
MAIN AF
R16
4.7k
R4
RV-308
R17
SRFL
SAFL
4.7k
SUB RF
R18
SUB AF
4.7k
SW-B BOARD
MIC BOARD
3.30V
SW-B BOARD
J2
L1 100μ MICI
M8V J1
F1K
L2 100μ MUD
L3 100μ SQLS F2K
MSND F3K
to VR-A
GND F4K
board J4
GND F5K
L4 HF50ACC322513
MICE F6K
GND F7K
AFO SSBK
CWK
to DISPLAY
Explanatory notes RTYK
board J4
AMK
VOLTAGE LINE
DATK
MSCK
TX LINE
EXTK
RECK
PLYK
MATK
GND
F1K,F2K,F3K,
F4K,F5K,F6K,
F7K,SSBK,CWK,
RTYK,AMK,DATK,
MSCK,EXTK,RECK,
PLYK,MATK
ON
OFF
JACK BOARD
RECK
J1
L4 100μ
PHE
L5 100μ PHOM
PHE
L6 100μ PHOS
PHE
to VR-A
PHI
board J3
GND
PLYK
DASH
DOT
GND
MATK
MESUREMENT CONDITIONS
voltage at RX
frequency : 14.1 MHz
mode : J3E(USB)
ANT(RX) : no input
Digital tester
range : input impedance
200mV : 100MΩ
MESUREMENT CONDITIONS
voltage at RX 2V : 11MΩ
frequency : 14.1 MHz 20V,200V,1000V : 10MΩ
mode : J3E(USB)
ANT(RX) : no input
Digital tester
range : input impedance
200mV : 100MΩ
2V : 11MΩ
20V,200V,1000V : 10MΩ
3.30V
3R3V 3R3V
R1
RK097111T005A
MESUREMENT CONDITIONS
voltage at RX
frequency : 14.1 MHz
mode : J3E(USB)
ANT(RX) : no input
R2
Digital tester
RK097111T005A
range : input impedance MIN/MAX
200mV : 100MΩ 0.0V/3.30V
2V : 11MΩ
20V,200V,1000V : 10MΩ
R3
RK097111T005A J1
3R3V
4.7k BRIL
R11
R12 4.7k CNTL
R4 R13 4.7k AVXL
RK097111T005A R14 4.7k VOXL
to DISPLAY
R15 4.7k DRVL
board J5
R16 4.7k CMPL
R17 4.7k MONL
R5 GND
RK097111T005A GND
R6
RK097111T005A
Explanatory notes
R7
RK097111T005A
VOLTAGE LINE
SSBK F1K
S8 LS8J2M S1 LS8J2M
SSB
F-1
CWK F2K
S9 LS8J2M S2 LS8J2M
CW
F-2
RTYK F3K
S10 LS8J2M
S3 LS8J2M
RTTY/PSK F-3
0.00V AMK F4K
S11 LS8J2M S4 LS8J2M
3.28V
AM/FM F-4
DATK F5K
S15 LS8J2M S12 LS8J2M S5 LS8J2M
REC
DATA F-5
MSCK F6K
S16 LS8J2M S13 LS8J2M S6 LS8J2M
PLAY M.SCOPE F-6
EXTK F7K
S17 LS8J2M S14 LS8J2M S7 LS8J2M
EXIT/SET F-7
AUTO TUNE MAIN