Voltage Diagrams - Icom IC-7800 Service Manual

SECTION 11

VOLTAGE DIAGRAMS

11-1 DISPLAY BOARD
DISPLAY BOARD
LDPS
J3 3R3V
GND
GND
NC
C225
0.1
LDPS IC7
BU2099FV
STBD
PWRD 1 20
VSS VDD
VOXD 2 19
NC OE
TN1D LDAT 3 18
Q501
DATA SO
TN2D R505 DTC114EU RTCCK 4 17
CLOCK Q11
220
LST
TMD 5 16
LCK Q10
MAGD PWRD 6 15
Q0 Q9
Q504
MNRD TN1D 7 14
Q1 Q8
DTA114EU
MNBD TN2D 8 13
Q2 Q7
SAGD VOXD 9 12
3.28V
Q3 Q6
SNRD 4.5mV MAGD 10 11
Q4 Q5
SNBD
TRAK R366 1k
CFBD_
PWRK R504 1k
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
R353 1k
KI9 KI9
KI10 R354 1k KI10
KI11 R355 1k KI11
KYSL R356 1k KYSL 3R3V
DELL R357 1k DELL
SAGL R358 1k SAGL
SSQL R359 1k SSQL
MIGL R360 1k MIGL
PWRL R361 1k
PWRL
MAGL R362 1k MAGL MAGL
MSQL R363 1k MSQL SAGL
3R3V AS0
3R3V
GND SSQL
C8
MSQL
GND 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 MRFL
R316 1k MAFL
MAFL R317 1k MAFL SAFL
SRFL R318 1k SRFL AS1
SAFL SAFL
R319 1k SRFL
NC D11 RB706F MRFL
NC D7
DAN222
to VR-A MUDL
board J1
NC
DOTK
R320 1k DOTK
DSHK R321 1k DSHK
NC
PHNI PHNI
R322 1k
SQLS
0.13V
NC
NC Q206
DTC114EU D8
NC 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 KI0
R2
GND GND KI2
R3
R3 AS3
R4 R4 KI3
R5 R5 KI1
GND
GND
G0 G0
G1 G1
G2
G2
GND GND
G3 G3
G4
G4
G5 G5
to LOGIC
unit J806
GND GND
B0
B0 LCD
B1 B1
B2 B2
GND GND KI7
B3 B3
B4
B4
B5 B5
GND GND KI8
HS
R209 0 HS KI10
VS R210 0 VS AS4
DE DE KI11
UD/RL KI9
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 RTCCE
R601
D602
0 RTCDT
MA2S111
Q211
TDTS DTA114EU
R602
SO STBD 4.7k RTCCK
Q200 3.28V
DTC144EU RTCIRQ
R330
2.2k CFBD
C601
J601
10
SNBD
BH-800.8
Q208
SNRD
DTA114EU
SAGD
3.22V
MNBD
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
D12
INH A
7 10 ASL1 RB706F
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
IC2 RESET
BU4051BCFV
C203
12p
C204
C207 0.1
12p
C224
RTCIRQ 0.1
1 16 3R3V RSB
X4 VDD
2 15 DRVL_ X1 RSA
X6 X2
CR-567
3 14 CMPL_ SSB
9.8304MHz
X X1
4 13 MONL_ SSA
X7 X0
5 12 VOXL_ MSB
X5 X3
6 11 ASL0 MSA
INH A
ASL1 TMD_
7 10
VEE B
8 9 ASL2 LEDV LEDV
VSS C
BKLS BKLS
IC3
BU4051BCFV
MAPL 0.28V
C205 0.1
1 16 3R3V
X4 VDD
2 15 SNCL
X6 X2
3 14
SAPL CFLV
X X1
4 13 MNCL
X7 X0
5 12 PITL
X5 X3
6 11
ASL0
INH A
7 10 ASL1
VEE B
8 9 ASL2
VSS C
IC4
BU4051BCFV
RESET
C15V
KI7
8V
MSND
C206 0.1 RESET
1 16 3R3V
X4 VDD
2 15
KI6
X6 X2
3 14 KI5
X X1
4 13 KI4
X7 X0
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
LDPS +15V
RESET
D10
R340 22
MA8033
10.55V
3.98V
Q210
14.88V
2SC4081
R326
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
3 20
CE0 NC
4 19
DI NC
R328
5 18 1 5
DO NC 68k
6 17 1 5 2
CLK NC
2
7 16 3 4
/TIRQ NC
3 4
8 15
/AIRQ NC
9 14
3.28V IC201
FOE NC R327
TC7SET08FU
10 IC202 15k
FOUT TC7SET08FU
11 R342
VDD
47k
C602
R343
0.1
47k
3R3V
3R3V
BKLS
LDPS LDPS
C15V
PWRK PWRK
L205
HF50ACC322513
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)
M30620FCMGP
14 62
VCC VSS
15 61
P85/NMI P30/A8(/-/D7)
16 60
P84/INT2 VCC
17 59
P83/INT1 P31/A9
18 58
P82/INT0 P32/A10
19 57
P81/TA4IN P33/A11
20 56
P80/TA4OUT P34/A12
21 55
P35/A13
P77/TA3IN
22 54
P76/TA3OUT P36/A14
23 53
P75/TA2IN P37/A15
24 52
P74/TAOUT P40/A16
25 51
P73/TA1IN P41/A17
CFLV
R501 47k
Explanatory notes
R502 47k
R329 10k
R503 47k
P2ST
CFBD_
C15V C15V C15V
TDTS
8V 8V
MSND MSND
RESET
RESET
3R3V
C216
0.1
5.50V
J4 J7
to SW-B board J1 to FLASH writer
L210 L211
D10F-A814AY 9.11V D10F-A814AY
Q204
2SB1201
2.7V
C213
D9
47
MA8047
C214
10
Q203
R208
2SC4081 Q201
T201
220 2SC3647
3319-T088
5V 1 12
2
11
3
R212 C212 C201 4
68k 10 0.12 5
Q205 8
Q212
DTC114EU
R213 DTC114EU 6 7
15k
Q202
2SC3647
4.81V R200 CFLH
1k
3R3V
KI6
C226
0.1
KI5
KI4
3R3V 3R3V
R335 82k SSA
R336 82k SSB
R337 82k
RSA
LDPS R338 82k RSB
UPK
DWK
5V VMK
MPWK
MWK
MPRK
XFCK
MINK
EQRK
SUBK
CHGK
SO
RTCCK
TDTS
LST
LDPS
5V L209
HF50ACC322513
3R3V
C229
0.1
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 R290
UPK
SAPL R289
MWK PITL R299
MPRK SATK R288
SUBK R287
SLCK
CHGK MLKC R286
SSPK R285
MINK P2ST R284
STSK R283
EQRK
MTSK R282
XFCK KI0 R281
RECK KI1 R280
PLYK R279
KI2
EXTK KI3 R278
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
range: input impedance
200mV: 100MΩ
VOLTAGE LINE Q503 2V: 11MΩ
DTC114EU
20V,200V,1000V: 10MΩ
LG_PWR
LDPS
2.70V 3.26V
Explanatory notes
CFBD_
7.94V 4.89V
8V 8V
L204
MSND MSND
10μ
5V
C220
0.1
14.91V
8V
RESET L208
C228 C227
HF50ACC322513
C15V 10
0.1
3R3V L203
C215
HF50ACC322513
0.1
L201
3.23V 3R3V
LG_RES
R651 IC651
56k R3112N281A
3.29V LG_PWR
1 5
OUT CD
2 R239 1k
VDD
3 4
R240 1k
VSS NC
R652 C651
C652
33k 0.1 0.027
C219
0.001
C218
C217
47 0.1
11 - 1
11-2 CF BOARD
CF BOARD
J1
GND GND
CD1#
CFD3
CFD3 CFD4
0.28V
CFD11
CFD5
CFD4 CFD6
DFD12 CFD7
DFD5
CE1#
C202 CFD13 CFA10
15p
CFD6 OE#
CFLH
MESUREMENT CONDITIONS
CFD14 CFA9
voltage at RX
CFD7 CFA8
frequency : 14.1 MHz
CFD15 mode : J3E(USB)
CFA7
ANT(RX) : no input
CE1# CF_VCC
CE2# Digital tester CFA6
range : input impedance
CFA10 CFA5
200mV : 100MΩ
VS1# CFA4
2V : 11MΩ
OE#
20V,200V,1000V : 10MΩ CFA3
IORD# CFA2
J1
CFA9 CFA1
3R3V IOWR# CFA0
R259 1k KI6 CFA8 CFD0
WE#
R260 1k KI5 CFD1
R261 1k KI4 CFA7 CFD2
RDY/BSY# WP
GND
CF_VCC CD2#
GND
CF_VCC CD1#
R331 47k SSA
CFA6
CFD11
R332 47k SSB
CSEL# CFD12
R333 47k
RSA
CFA5 CFD13
R334 47k RSB
VS2# CFD14
NC
CFA4 CFD15
R262 1k UPK
RESET
CE2#
R263 1k DWK
CFA3 VS1#
R264 1k VMK WAIT# IORD#
R265 1k MPWK CFA2
to TENKEY IOWR#
board J1
R266 1k MWK INPACK# WE#
R267 1k CFA1
MPRK RDY/BSY#
R268 1k XFCK REG# CF_VCC
CFA0 CSEL#
R269 1k MINK
BVD2
R270 1k VS2#
EQRK
CFD0 RESET
R271 1k SUBK
BVD1
WAIT#
R272 1k CHGK
CFD1 INPACK#
NC
CFD8 REG#
R273 1k LDAT
CFD2
BVD2
R274 1k LCK
CFD9 BVD1
R275 1k LOE
WP CFD8
R276 1k LST1
CFD10 CFD9
NC CD2# CFD10
NC GND GND
LDPS
3.30V
ACCESS LED(RED)
J2
J3
5V
R1
CFBD_
NC
GND
1k MAPL 1.8k
DS1
1k MNCL
SML-512UW
NC
NC
MP2B
MP2A
MP1B
MP1A
NC
SP1A
SP1B
SP2A
to TENKEY
SP2B board J2
1k SNCL
1k SAPL
1k PITL
1k SATK
1k
SLCK
1k MLCK
1k SSPK
4.7k MSPK
1k STSK
1k MTSK
1k KI0
1k KI1
1k
KI2
1k KI3
NC
J205
GND
MSA MAIN
MSB
SENSOR
5V
J302
LDPS
CFBD_
to CF
board J3
GND
VOLTAGE LINE
J203
VDD5VF
NC
GND
MSND
8V
NC
C15V
C15V
C15V
GND
to LOGIC
GND
unit J805
10μ
+3R3V
LG_RES
NC
LG_PWR
NC
LTXD
LRXD
GND
GND
J2