Icom IC-7800 Service Manual Addendum page 525

SECTION 11 VOLTAGE DIAGRAMS
11-1 DISPLAY BOARD
DISPLAY BOARD
LDPS
J3 3R3V
GND
GND
NC
C225
0.1
LDPS
IC7
STBD BU2099FV
PWRD 1
VSS VDD
VOXD 2
NC OE
TN1D LDAT
3
Q501 DATA SO
TN2D R505 DTC114EU RTCCK 4
220 CLOCK Q11
TMD LST 5
LCK Q10
PWRD
MAGD 6
Q0 Q9
MNRD Q504 TN1D 7
Q1 Q8
DTA114EU
MNBD TN2D 8
Q2 Q7
VOXD
SAGD 3.28V 9
Q3 Q6
SNRD MAGD 10
4.5mV
Q4 Q5
SNBD
TRAK R366 1k
PWRK R504 1k CFBD_
MOND TRAK
to SW-A
NC
board J3
Q505
TMD_
NC DTC114EU
NC MOND PWRK
NC
4.5mV
NC 1.0mV
KI7 R351 1k KI7
KI8 R352 1k KI8
KI9 R353 1k KI9
KI10 R354 1k KI10
KI11 R355 1k KI11
3R3V
KYSL R356 1k KYSL
DELL R357 1k DELL
SAGL R358 1k SAGL
SSQL R359 1k SSQL
MIGL R360 1k MIGL
PWRL R361 1k PWRL
MAGL
MAGL R362 1k MAGL
MSQL R363 1k MSQL SAGL
3R3V 3R3V AS0
GND SSQL
C8
GND MSQL
0.1
J6
NC
NC
GND
NC C222
0.1
3R3V 3R3V
MNBL R312 1k MNBL
MNRL R313 1k MNRL
SNBL R314 1k SNBL
SNRL R315 1k SNRL
MRFL R316 1k MRFL MAFL
MAFL R317 1k MAFL SAFL
SRFL R318 1k SRFL AS1
SAFL R319 1k SAFL SRFL
NC D11 RB706F MRFL
D7
NC
DAN222
to VR-A MUDL
board J1
NC
DOTK DOTK
R320 1k
DSHK R321 1k DSHK
NC
PHNI PHNI
R322 1k
SQLS
0.13V
NC
NC Q206
D8
NC DTC114EU
R323 DAP222 3.26V
10k
NC AVXL_
NC BRIT_
NC SQSS AS2
MSND MSND
M8V 8V CNTL_
C223 L207
0.1
HF50ACC322513
7.94V
J202 J201 CN1
GND GND
LCLK LCLK
GND
GND
R0 R0
R1 R1
R2
R2
GND GND
R3 R3 AS3
R4
R4
R5 R5
GND GND
G0
G0
G1 G1
G2 G2
GND
GND
G3
G3
G4 G4
to LOGIC G5 G5
unit J806 GND
GND
B0 B0
LCD
B1 B1
B2
B2
GND GND KI7
B3 B3
B4
B4
B5 B5
GND GND
HS R209 0 HS
VS AS4
R210 0 VS
DE DE
UD/RL UD/RL
GND GND
NC CNTV
NC BRIV
GND GND
GND GND
LVDD4 LVDD4
LVDD3
LVDD3
LVDD2 LVDD2
LVDD1 LVDD1
CN2 J301
CFLH
GND
1.97V
1.43V
LDPS LDPS
RESET
L601
10µ
3R3V
Q601
2SA1162
RESET
C15V
R601
D602
20 0
MA2S111
Q211
19 TDTS
DTA114EU R602
SO STBD 4.7k
18 3.28V
Q200
17 DTC144EU
R330
16 2.2k CFBD C601
J601
SNBD 10
15 BH-800.8
14 SNRD
Q208
DTA114EU
13 SAGD
3.22V
12 MNBD
11 MNRD
R325
330
RESET
3R3V
C15V
TMD_
PWRK
MOND
PWRK
3R3V 3R3V
C209 0.1
1 16
3R3V
X4 VDD
R365 2.2k
2 15 KYSL
X6 X2
3 14 PWRL
X X1
R364 47k
4 13 MIGL
X7 X0
5 12 DELL
X5 X3
6 11 ASL0
INH A
7 10 ASL1
VEE B
8 9 ASL2
VSS C
C230
0.0047
IC1
BU4051BCFV
C208 0.1
R369 0
1 16 3R3V CNTV_ CNTV
X4 VDD
2 15 SNRL BRIV
X6 X2
3 14 MNBL LDAT
X X1
4 13 MNRL LST
X7 X0
5 12 SNBL RTCCK
X5 X3
6 11 ASL0
INH A
7 10 ASL1 CNVSS
VEE B
8 9 ASL2 RTCCE
VSS C
MOND
RESET
IC2
BU4051BCFV
C203
12p
C204
C207 0.1 12p
RTCIRQ
1 16 3R3V
X4 VDD
2 15 DRVL_ X1
X6 X2
CR-567
3 14 CMPL_
X X1 9.8304MHz
4 13 MONL_
X7 X0
5 12 VOXL_
X5 X3
6 11 ASL0
INH A
7 10 ASL1
VEE B
8 9 ASL2 LEDV
VSS C
BKLS
IC3
BU4051BCFV
MAPL
0.28V
C205 0.1
KI0 1 16 3R3V
X4 VDD
KI2 2 15 SNCL
X6 X2
3 14 SAPL CFLV
X X1
KI3 4 13
MNCL
X7 X0
KI1 5 12 PITL
X5 X3
6 11 ASL0
INH A
ASL1
7 10
VEE B
8 9 ASL2
VSS C
IC4
BU4051BCFV
RESET
C15V
KI7 8V
MSND
C206 0.1
KI8 1 16 3R3V
X4 VDD
2 15
KI10 KI6
X6 X2
3 14 KI5
X X1
KI11 4 13 KI4
X7 X0
KI9 5 12
X5 X3
6 11 ASL0
INH A
7 10 ASL1
VEE B
8 9 ASL2
VSS C
IC5
BU4051BCFV
8V 8V
MSND MSND
CFLH
J5
to VR-D board J1
7.26V Q209
2SB1201 R339 22
+15V
LDPS
RESET
D10 R340 22
MA8033
3.98V
Q210 14.88V
R326 2SC4081
220
R603 R604
IC601
47k 10k
RX-4581 3.52V C221
0.1
1 22 5V
GND NC
C211 C210 0.1
2 21
CE1 NC
0.1
RTCCE 3 20
CE0 NC
RTCDT 4 19
DI NC
R328
5 18 1
NC 68k
DO
RTCCK 6 1 5 2
17
CLK NC
RTCIRQ 7 16 2 3
/TIRQ NC
3
8 15 4
/AIRQ NC
3.28V 9 14
FOE NC R327 IC201
10 15k TC7SET08FU
IC202
FOUT
11 TC7SET08FU
R342
VDD
47k
C602
R343
0.1
47k
3R3V 3R3V
BKLS
LDPS LDPS
C15V
PWRK
L205
HF50ACC322513
D12
RB706F
C232
0.1
1 75
P94/DA1 P13/D11-
2 74
P93/DA0 P14/D12-
3 73
P92/TB2IN P15/D13-
4 72
P91/TB1IN P16/D14-
5 71
P90/TB0IN P17/D15-
6 70
BYTE P20/A0(/D0/D-)
7 69
CNVSS P21/A1(/D1/D0)
8 68
P87/XCIN P22/A2(/D2/D1)
9 67
P86/XCOUT P23/A3(/D3/D2)
10 66
RESET P24/A4(/D4/D3)
11 65
XOUT P25/A5(/D5/D4)
12 64
VSS P26/A6(/D6/D5)
13 63
XIN IC6 P27/A7(/D7/D6)
14 M30620FCMGP 62
VCC VSS
15 61
C224 P85/NMI P30/A8(/-/D7)
0.1 16 60
P84/INT2 VCC
RSB 17 59
P83/INT1 P31/A9
18 58
RSA
P82/INT0 P32/A10
SSB 19 57
P81/TA4IN P33/A11
SSA 20 56
P80/TA4OUT P34/A12
21 55
MSB
P77/TA3IN P35/A13
MSA 22 54
P76/TA3OUT P36/A14
TMD_ 23 53
P75/TA2IN P37/A15
24 52
LEDV
P74/TAOUT P40/A16
25 51
BKLS
P73/TA1IN P41/A17
CFLV
R501 47k
R502 47k
R329 10k
R503 47k
P2ST
CFBD_
C15V C15V
TDTS
8V 8V
MSND MSND
RESET RESET
RESET
3R3V
C216
0.1
5.50V
J4 J7
to SW-B board J1 to FLASH writer
L210 L211
D10F-A814AY D10F-A814AY
9.11V
Q204
2SB1201
2.7V
C213
D9
10.55V 47
MA8047
C214
10
Q203
R208
2SC4081 Q201 T201
220
2SC3647
3319-T088
5V 1 12
2 11
3
R212 C212 4
C201
68k 10 0.12
5 5 8
Q205 Q212
R213 DTC114EU 6 7
DTC114EU
15k
4
Q202
2SC3647
CFLH
4.81V R200
1k
3R3V
C226 KI6
0.1 KI5
KI4
3R3V 3R3V
R335 82k
R336 82k
R337 82k
LDPS R338 82k
UPK
DWK
PWRK 5V VMK
MPWK
MWK
MPRK
XFCK
MINK
EQRK
SUBK
CHGK
SO
RTCCK
TDTS
LST
LDPS
5V
3R3V
MAPL R301
MNCL R300
R302-R309 10k
MP2B R298 1k
MP2A R297 1k
SATK MP1B R296 1k
MLCK MP1A R295 1k
MTSK SP1A R294 1k
MATK SP1B R293 1k
VMK SP2A R292 1k
MPWK SP2B R291 1k
DWK SNCL
UPK
SAPL
MWK PITL
MPRK SATK
SUBK
SLCK
CHGK MLKC
SSPK
MINK
P2ST
STSK
EQRK MTSK
XFCK
KI0
RECK KI1
PLYK KI2
EXTK
KI3
MSCK
DATK
AMK
RTYK
C231
0.1
MSA R255 47k
MSB R256 47k
5V
3.20V
2.40V
MESUREMENT CONDITIONS
Q502 voltage at RX
DTC114EU
Digital tester
LG_RES
Explanatory notes range: input impedance
200mV: 100MΩ
VOLTAGE LINE 2V: 11MΩ
Q503
DTC114EU 20V,200V,1000V: 10MΩ
LG_PWR
LDPS
3.26V
2.70V
CFBD_
C15V
7.94V
8V 8V
MSND MSND
5V
C220
0.1
14.91V
8V
RESET
C228 C227
10
C15V 0.1
3R3V
C215
0.1
3.23V 3R3V
LG_RES
R651
IC651
56k R3112N281A LG_PWR
3.29V
1 5
OUT CD
2 R239 1k
VDD
3 4 R240 1k
VSS NC
R652 C651
C652
33k 0.1 0.027
C218 C217
47 0.1
11 - 1
11-2 CF BOARD
CF BOARD
J1
GND
CD1#
CFD3
0.28V
CFD11
CFD4
DFD12
DFD5
C202 CFD13
15p
CFD6
CFLH
MESUREMENT CONDITIONS
CFD14
voltage at RX
CFD7
frequency : 14.1 MHz
CFD15 mode : J3E(USB)
ANT(RX) : no input
CE1#
CE2# Digital tester
range : input impedance
CFA10
200mV : 100MΩ
VS1#
2V : 11MΩ
OE#
20V,200V,1000V : 10MΩ
IORD#
J1 CFA9
3R3V IOWR#
CFA8
R259 1k KI6
R260 1k KI5 WE#
CFA7
R261 1k KI4
RDY/BSY#
GND
CF_VCC
GND
CF_VCC
SSA R331 47k SSA
CFA6
SSB R332 47k SSB
CSEL#
R333 47k
RSA RSA
CFA5
RSB R334 47k RSB
VS2#
NC CFA4
R262 1k UPK
RESET
R263 1k DWK CFA3
R264 1k VMK WAIT#
R265 1k MPWK CFA2
to TENKEY
R266 1k MWK board J1 INPACK#
CFA1
R267 1k MPRK
REG#
R268 1k
XFCK
CFA0
R269 1k MINK
BVD2
R270 1k EQRK
CFD0
R271 1k
SUBK
BVD1
R272 1k CHGK
CFD1
NC
CFD8
R273 1k LDAT CFD2
R274 1k LCK
CFD9
R275 1k LOE WP
R276 1k LST1 CFD10
CD2#
NC
GND
NC
LDPS 3.30V
L209
HF50ACC322513
ACCESS LED(RED)
J2
C229
J3
0.1 5V R1
CFBD_
NC
GND
1.8k
1k MAPL DS1
SML-512UW
1k MNCL
NC
NC
MP2B
MP2A
MP1B
MP1A
NC
SP1A
SP1B
SP2A to TENKEY
SP2B board J2
R290 1k SNCL
R289 1k SAPL
R299 1k PITL
R288 1k SATK
R287 1k
SLCK
R286 1k MLCK
R285 1k SSPK
R284 4.7k
MSPK
R283 1k STSK
R282 1k MTSK
R281 1k
KI0
R280 1k KI1
R279 1k KI2
R278 1k
KI3
NC
J205
GND
MAIN
MSA
MSB
SENSOR
5V
J302
LDPS
CFBD_ to CF
GND board J3
Explanatory notes
VOLTAGE LINE
4.89V
L204
J203
10µ
VDD5VF
NC
GND
MSND
8V
L208 NC
HF50ACC322513
C15V
C15V
L203 C15V
HF50ACC322513
GND
to LOGIC
GND
unit J805
L201 10µ
+3R3V
LG_RES
NC
LG_PWR
NC
LTXD
LRXD
GND
GND
C219
0.001
J2
GND
CFD3
CFD4
CFD5
CFD6
CFD7
CE1#
CFA10
OE#
CFA9
CFA8
CFA7
CF_VCC
CFA6
CFA5
CFA4
CFA3
CFA2
CFA1
CFA0
CFD0
CFD1
CFD2
WP
CD2#
CD1#
CFD11
CFD12
CFD13
CFD14
CFD15
CE2#
VS1#
IORD#
IOWR#
WE#
RDY/BSY#
CF_VCC
CSEL#
VS2#
RESET
WAIT#
INPACK#
REG#
BVD2
BVD1
CFD8
CFD9
CFD10
GND