Icom IC-7800 Service Manual Addendum page 304

Jul. 2008
SECTION 11 VOLTAGE DIAGRAMS
Jul. 2008
DISPLAY BOARD
DISPLAY BOARD
LDPS LDPS
J3 3R3V
GND
GND
NC C225
LDPS 0.1
IC7
BU2099FV
STBD
PWRD 1 20
VSS VDD
VOXD 2 19 TDTS
NC OE
TN1D LDAT 3 18
Q501
DATA SO
R505 DTC114EU
TN2D RTCCK 4 17
CLOCK Q11
220
TMD LST 5 16
LCK Q10
PWRD
MAGD 6 15
Q0 Q9
Q504
MNRD TN1D 7 14
DTA114EU Q1 Q8
MNBD TN2D 8 13
Q2 Q7
SAGD 3.28V VOXD 9 12
Q3 Q6
SNRD MAGD 10 11
4.5mV
Q4 Q5
SNBD
TRAK R366 1k
PWRK R504 1k CFBD_
MOND TRAK
to SW-A
NC
board J3 Q505
NC DTC114EU TMD_
MOND
NC 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
R356 1k 3R3V
KYSL KYSL
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 3R3V AS0
SSQL
GND
C8
GND 0.1 MSQL
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 SRFL AS1
R318 1k
SAFL R319 1k SAFL SRFL
NC D11 RB706F MRFL
D7
NC
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_
BRIT_
NC
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 KI0
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
to LOGIC G5
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
UD/RL KI9
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
RESET
L601
10μ
3R3V
Q601
R603
2SA1162 47k
RESET
C15V R601 RTCCE
D602
0 RTCDT
MA2S111
Q211
DTA114EU
R602
SO STBD 4.7k RTCCK
Q200 3.28V
DTC144EU
R330 RTCIRQ
2.2k CFBD C601
J601
SNBD 10
BH-800.8 3.28V
SNRD Q208
DTA114EU
SAGD
3.22V
MNBD
MNRD
R325
330
RESET
3R3V
C15V
TMD_
PWRK
MOND
PWRK
3R3V 3R3V
C209 0.1
L205
1 16 3R3V HF50ACC322513
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
IC1 0.0047
BU4051BCFV
C208 0.1
R369 0
1 16 3R3V CNTV_ CNTV 1
X4 VDD
2 15 SNRL BRIV 2
X6 X2
3 14 MNBL LDAT 3
X X1
4 13 MNRL LST 4
X7 X0
5 12 SNBL RTCCK 5
X5 X3
6 11 ASL0 6
INH A
7 10 ASL1 CNVSS 7
VEE B
8 9 ASL2 RTCCE 8
VSS C
MOND 9
IC2 RESET 10
BU4051BCFV
11
12
C203
12p 13
C204 14
C207 0.1 12p
15
C224
16
RTCIRQ 0.1
1 16 3R3V RSB 17
X4 VDD
2 15 DRVL_ X1 RSA 18
X6 X2
CR-567
3 14 CMPL_ SSB 19
X X1 9.8304MHz
4 13 MONL_ SSA 20
X7 X0
5 12 VOXL_ MSB 21
X5 X3
6 11 ASL0 MSA 22
INH A
7 10 ASL1 TMD_ 23
VEE B
8 9 ASL2 LEDV LEDV 24
VSS C
25
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 R501
X7 X0
5 12 PITL R502
X5 X3
6 11 ASL0
INH A
ASL1
7 10
VEE B
8 9 ASL2 R329
VSS C
R503
IC4
BU4051BCFV
RESET
C15V C15V
KI7 8V 8V
MSND 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
J4
to VR-D board J1
L210
D10F-A814AY
Q209
7.26V
2SB1201
R339 22
LDPS +15V
RESET
D10 R340 22
MA8033
10.55V
3.98V
Q210 14.88V C214
2SC4081 10
R326
220
R604 IC601
10k RX-4581
3.52V C221
0.1
1 22 5V 5V
GND NC
2 21 C211 C210 0.1
CE1 NC 0.1
3 20
CE0 NC
4 19 R212
DI NC
R328 68k
5 18 1 5
DO NC 68k
6 17 1 5 2 R213
CLK NC 15k
2 3
7 16 4
/TIRQ NC
8 15 3 4
/AIRQ NC
9 14 IC201
FOE NC R327
TC7SET08FU
10 IC202 15k
FOUT
TC7SET08FU
11 R342
VDD
47k
C602
0.1 R343
47k
3R3V
3R3V
BKLS
LDPS
LDPS
C15V
PWRK PWRK
C232
0.1
75
P94/DA1 P13/D11-
74
P93/DA0 P14/D12-
73
P92/TB2IN P15/D13-
72
P91/TB1IN P16/D14-
71 MATK
P90/TB0IN P17/D15-
70 VMK
BYTE P20/A0(/D0/D-)
69 MPWK
CNVSS P21/A1(/D1/D0)
68 DWK
P87/XCIN P22/A2(/D2/D1)
67 UPK
P86/XCOUT P23/A3(/D3/D2)
66 MWK
RESET P24/A4(/D4/D3)
65 MPRK
XOUT P25/A5(/D5/D4)
64 SUBK
VSS P26/A6(/D6/D5)
63 CHGK
XIN IC6 P27/A7(/D7/D6)
M30620FCMGP 62
VCC VSS
61 MINK
P85/NMI P30/A8(/-/D7)
60
P84/INT2 VCC
59 EQRK
P83/INT1 P31/A9
58 XFCK
P82/INT0 P32/A10
57 RECK
P81/TA4IN P33/A11
56 PLYK
P80/TA4OUT P34/A12
55 EXTK
P77/TA3IN P35/A13
54 MSCK
P76/TA3OUT P36/A14
53 DATK
P75/TA2IN P37/A15
52 AMK
P74/TAOUT P40/A16
51 RTYK
P73/TA1IN P41/A17
C231
0.1
CFLV
47k
Explanatory notes
47k
VOLTAGE LINE
10k
47k
P2ST
CFBD_
C15V C15V
TDTS
8V 8V
MSND MSND
RESET RESET
RESET
3R3V
R651
C216 56k
0.1
5.50V
R652 C652
33k 0.1
J7
to SW-B board J1 to FLASH writer
L211
9.11V D10F-A814AY
Q204
2SB1201
2.7V
C213
D9 0.28V
47
MA8047
Q203
R208
2SC4081 Q201
T201
220 2SC3647 C202
3319-T088 15p
1 12 CFLH
2 11
3
C212 4
C201
10 0.12 5
Q205 8
Q212
DTC114EU
DTC114EU 6 7
Q202
2SC3647
4.81V R200 CFLH
1k
3R3V
KI6 R259 1k
C226
0.1 KI5 R260 1k
KI4 R261 1k
3R3V 3R3V
R335 82k SSA R331 47k
R336 82k SSB R332 47k
R337 82k RSA R333 47k
LDPS R338 82k R334 47k
RSB
R262 1k
UPK
DWK R263 1k
VMK R264 1k
5V
MPWK R265 1k MPWK
MWK R266 1k
MPRK R267 1k
XFCK R268 1k
MINK R269 1k
EQRK R270 1k
SUBK R271 1k
CHGK R272 1k
SO R273 1k
RTCCK R274 1k
TDTS R275 1k
LST R276 1k
LDPS
5V L209
HF50ACC322513
3R3V
C229
0.1
MAPL R301 1k
MNCL R300 1k
R302-R309 10k
MP2B R298 1k
MP2A R297 1k
SATK
MP1B R296 1k
MLCK MP1A R295 1k
MTSK SP1A R294 1k
SP1B R293 1k
SP2A R292 1k
SP2B R291 1k
SNCL R290 1k
SAPL R289 1k
PITL R299 1k
SATK R288 1k
SLCK R287 1k
MLKC R286 1k
SSPK R285 1k
P2ST R284 4.7k
R283 1k
STSK
MTSK R282 1k
KI0 R281 1k
KI1 R280 1k
KI2 R279 1k
KI3 R278 1k
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
Q503 2V: 11MΩ
DTC114EU 20V,200V,1000V: 10MΩ
LG_PWR
LDPS
CFBD_
3.26V
2.70V
Explanatory notes
VOLTAGE LINE
CFBD_
7.94V 4.89V
8V
MSND L204
10μ
5V VDD5VF
C220
0.1
14.91V MSND
8V
L208
C228 C227
10 HF50ACC322513
C15V 0.1
L203
3R3V
C215
HF50ACC322513
0.1
L201 10μ
3.23V
3R3V +3R3V
LG_RES LG_RES
IC651
R3112N281A LG_PWR LG_PWR
3.29V
1 5
OUT CD
2 R239 1k
VDD
3 4 R240 1k
VSS NC
C651
0.027
C219
0.001
C218 C217
47 0.1
59
CF BOARD
CF BOARD
J1 J2
GND GND
CD1#
CFD3
CFD3 CFD4
CFD11 CFD5
CFD4 CFD6
DFD12
CFD7
DFD5 CE1#
CFD13 CFA10
CFD6 OE#
MESUREMENT CONDITIONS
CFD14 CFA9
voltage at RX
CFD7
frequency : 14.1 MHz CFA8
CFD15 mode : J3E(USB) CFA7
ANT(RX) : no input
CE1# CF_VCC
CE2# Digital tester CFA6
CFA10 range : input impedance
CFA5
200mV : 100MΩ
VS1# CFA4
2V : 11MΩ
OE# 20V,200V,1000V : 10MΩ CFA3
IORD# CFA2
J1 CFA9
CFA1
3R3V IOWR# CFA0
KI6 CFA8 CFD0
KI5 WE# CFD1
CFA7
KI4 CFD2
GND RDY/BSY# WP
CF_VCC CD2#
GND
CF_VCC CD1#
SSA
CFA6 CFD11
SSB
CSEL#
CFD12
RSA
CFA5 CFD13
RSB
VS2# CFD14
NC
CFA4 CFD15
UPK RESET
CE2#
DWK
CFA3 VS1#
VMK WAIT# IORD#
CFA2 IOWR#
to TENKEY
MWK board J1 INPACK#
WE#
MPRK CFA1 RDY/BSY#
XFCK REG# CF_VCC
CFA0 CSEL#
MINK
BVD2
EQRK VS2#
CFD0 RESET
SUBK
BVD1 WAIT#
CHGK
CFD1 INPACK#
NC
CFD8 REG#
LDAT
CFD2
BVD2
LCK
CFD9 BVD1
LOE
WP CFD8
LST1 CFD10 CFD9
NC CD2#
CFD10
NC
GND GND
LDPS
3.30V
ACCESS LED(RED)
J2
J3
5V
R1
CFBD_
NC
GND
MAPL 1.8k
DS1
MNCL
SML-512UW
NC
NC
MP2B
MP2A
MP1B
MP1A
NC
SP1A
SP1B
SP2A
to TENKEY
SP2B board J2
SNCL
SAPL
PITL
SATK
SLCK
MLCK
SSPK
MSPK
STSK
MTSK
KI0
KI1
KI2
KI3
NC
J205
GND
MAIN
MSA
MSB
SENSOR
5V
J302
LDPS
to CF
board J3
GND
J203
NC
GND
8V
NC
C15V
C15V
C15V
GND
to LOGIC
GND
unit J805
NC
NC
LTXD
LRXD
GND
GND