Icom IC-7800 Service Manual Addendum page 218

Aug. 2008
TENKEY BOARD
Jul. 2008
TENKEY BOARD
J7
GND
RSA
RIT SENSOR
RSB
5V
B
J6
GND
SSA
SUB SENSOR SSB
5V
J1
3R3V
KI6
KI5
KI4
GND
GND
SSA
SSB
RSA
RSB
UPK
DWK
VMK
to DISPLAY MPWK
board J1 MWK
MPRK
XFCK
MINK
EQRK
SUBK
CHGK
LDAT
LCK
LOE
LST1
LDPS
J2
5V
MAPL
MNCL
MP2B
MP2A
MP1B
MP1A
SP1A
SP1B
SP2A
SP2B
to DISPLAY
SNCL
board J2
SAPL
PITL
SATK
SLCK
MLCK
SSPK
MSPK
STSK
MTSK
KI0
KI1
KI2
KI3
J3
3R3V
KI3
KI2
KI1
KI0
MTSK
STSK
MSPK
SSPK
MLCK
SLCK
SATK
GND
to SW-C
MPCD
board J1
SPCD
MAPD
SAPD
MAUD
SAUD
MNCD
SNCD
LDPS
PITL
SAPL
SNCL
SP2B
SP2A
SP1B
SP1A
J4
MP1A
MP1B
MP2A
MP2B
GND
to PBT1
GND
board J1
GND
MNCL
MAPL
3R3V
J5
LDPS
MTXD
MRXD
MLCD
SPLD
to LED
STXD
board J1
SRXD
SLCD
GND
D C turn left
5V 5V
GND
A,C A,C
RSA
0V 0V
RSB
5V 5V
5V
B,D B,D
0V 0V
A
3.30V
GND
SSA
SSB
5V 3R3V
3R3V
KI6
KI5
KI4
GND
GND
UPK
DWK
VMK
MPWK
MWK
MPRK
XFCK
MINK
EQRK
SUBK
CHGK
LDAT
LCK
LOE
LST1
LDPS
MAPL
MNCL
4.88V
MP2B
MP2A
MP1B
MP1A
SP1A
SP1B
SP2A
SP2B
SNCL
SAPL
PITL
TKYD1
TKYD2
TKYD3
TKYD4
SUBD
MIND
LDPS
3R3V
MPCD
SPCD
MAPD
SAPD
MAUD
SAUD
MNCD
SNCD
LDPS
PITL
SAPL
SNCL
SP2B
EQRK
SP2A
XFCK
SP1B
SP1A
MP1A
MP1B
MP2A
MP2B
MNCL
MAPL
3R3V
LDPS
MTXD
MRXD
MLCD
SPLD
STXD
SRXD
SLCD
turn right
OFF 3.30V OFF 3.30V
1.8 (1) 0.000V 3.5 (2) 0.000V
10 (4) 0.803V 14 (5) 0.808V
21 (7) 1.665V 24 (8) 1.664V
GENT(.) 2.51V 50 (0) 2.52V
3R3V
KI5
KI4
S11 S15
LS9J2M LS9J2M
R51 R59
390 390
R52 R60
390 390
3.5(2)
1.8(1)
TKYD1
S12 S16
LS9J2M LS9J2M
R53 R61
390 390
R54 R62
390 390
14(5)
10(4)
TKYD2
S13 S17
LS9J2M LS9J2M
R55 R63
390 390
R56 R64
390 390
21(7)
24(8)
TKYD3
S18
S14 LS9J2M
R57 R65
LS9J2M
390
390
R58 R66
390
390
GENT(.)
50(0)
TKYD4
TKYD1
TKYD2
TKYD3
TKYD4
SUBD
MIND
LDPS
MWK
VMK VMK
UPK
S3
S1
LS8J2M
LS8J2M
V/M
UP
MPRK
MPWK MPWK
DWK
S2 S4
LS8J2M LS8J2M
MP-W
DOWN
SUBK SUBK
CHGK CHGK
LDPS
MIND
DS1
SML-512DW
R75
1.5k
MINK MINK
S8
LS8J2M
S7
LS8J2M
MAIN
UPK,DWK,VMK,MPWK,
MWK,MPRK,XFCK,MINK,
EQRK,SUBK,CHGK
EQRK
ON 0.00V
OFF 3.28V S9
XFC
LS8J2M
M=S
OFF 3.30V
1.8 (1) 0.000V
7 (3) 0.812V
18 (6) 1.67V
F-INP(ENT) 2.52V
3R3V
KI4
S19
LS9J2M
R67
390
R68
390
7(3)
TKYD1
S20
LS9J2M
R69
390
R70
390
18(6)
TKYD2
S21
LS9J2M
R71
390
R72
390
28(9)
TKYD3
S22
LS9J2M
R73
390
R74
LOE
390
C4 0.1
F-INP(ENT)
TKYD4
IC1
BU2099FV
1 20
VSS VDD
2 19
NC OE
LDAT 3 18
DATA SO
4 17
LCK
CLOCK Q11
SUBD LST1 5 16
LCK Q10
MIND MTXD 6 15
Q0 Q9
MRXD 7 14
LDPS
Q1 Q8
MLCD 8 13
Q2 Q7
MWK SPLD 9 12
Q3 Q6
STXD 10 11
Q4 Q5
S5
LS8J2M
MW
MPRK
S6
LOE
LS8J2M
C5 0.1
MP-R IC2
BU2099FV
1 20
VSS VDD
2 19
NC OE
3 18
DATA SO
LDPS LCK 4 17
CLOCK Q11
MIND LST1 5 16
LCK Q10
6 15
DS2 SUBD MPCD
Q0 Q9
SML-512DW SPCD 7 14
Q1 Q8
MAPD 8 13
R76 Q2 Q7
9 12
SAPD
Q3 Q6
MAUD 10 11
1.5k Q4 Q5
SUBK
S23
LS8J2M
SUB
CHGK
S24
LS8J2M MESUREMENT CONDITIONS
Explanatory notes voltage at RX
frequency : 14.1 MHz
mode : J3E(USB)
CHANGE ANT(RX) : no input
VOLTAGE LINE
Digital tester
range : input impedance
200mV : 100MΩ
2V : 11MΩ
20V,200V,1000V : 10MΩ
61
3R3V
LOE
3R3V
LOE
TKYD4
TKYD3
TKYD2
TKYD1
SLCD
SRXD
LOE
3R3V
LOE
MIND
SUBD
SNCD
MNCD
SAUD