Icom IC-7800 Service Manual Addendum page 67

Dec. 2009
SECTION X VOLTAGE DIAGRAMS
DISPLAY BOARD
LDPS
J3
GND
GND
NC
C225
0.1
LDPS
STBD
PWRD
VOXD
TN1D LDAT
Q501
TN2D R505 DTC114EU RTCCK
220
TMD LST
MAGD PWRD
Q504
MNRD TN1D
DTA114EU
MNBD TN2D
SAGD 3.28V VOXD
SNRD MAGD
4.5mV
SNBD
TRAK R366 1k
PWRK R504 1k
MOND
to SW-A
NC
board J3 Q505
NC DTC114EU TMD_
NC MOND PWRK
NC
NC 1.0mV 4.5mV
KI7 R351 1k KI7
KI8 R352 1k KI8
KI9 R353 1k KI9
KI10 R354 1k KI10
KI11 R355 1k KI11
KYSL R356 1k KYSL 3R3V
DELL
R357 1k DELL
SAGL R358 1k SAGL
R359 1k
SSQL SSQL
MIGL R360 1k MIGL
PWRL R361 1k PWRL
MAGL R362 1k MAGL
MSQL R363 1k MSQL
3R3V 3R3V
GND
C8
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 R316 1k MRFL
MAFL MAFL
R317 1k
SRFL R318 1k SRFL
SAFL SAFL
R319 1k
NC D11 RB706F
D7
NC
DAN222
to VR-A MUDL
board J1
NC
DOTK R320 1k
DSHK R321 1k
NC
PHNI R322 1k
SQLS
0.13V
NC
Q206
NC
DTC114EU D8
NC R323
DAP222
10k
NC
NC
NC
MSND
M8V
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
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
B3 B3
B4 B4
B5
B5
GND GND
HS
R209 0 HS
VS 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
1.97V
1.43V
LDPS LDPS
RESET
L601
10m
3R3V 3R3V
Q601
2SA1162
RESET
IC7
BU2099FV C15V
R601
1 20 0
VSS VDD
Q211
2 19 TDTS
DTA114EU R602
NC OE
3 18 SO STBD 4.7k
DATA SO Q200 3.28V
4 17 DTC144EU
R330
CLOCK Q11
5 16 2.2k CFBD
LCK Q10 J601
6 15 SNBD
BH-800.8
Q0 Q9
Q208
7 14 SNRD
Q1 Q8
DTA114EU
8 13 SAGD
3.22V
Q2 Q7
9 12 MNBD
Q3 Q6
10 11 MNRD R325
Q4 Q5
330
RESET
CFBD_ 3R3V
TRAK C15V
TMD_
PWRK
MOND
PWRK
3R3V 3R3V
C209 0.1
16
MAGL 1 3R3V
X4 VDD
R365
SAGL 2 15 KYSL
X6 X2
3 14
AS0 PWRL
X X1
R364
SSQL 4 13 MIGL
X7 X0
5 12
MSQL DELL
X5 X3
6 11 ASL0
INH A
7 10 ASL1
VEE B
8 9 ASL2
VSS C
IC1
CD4051BPWR
C208 0.1
MAFL 1 16 3R3V CNTV_
X4 VDD
BRIV
SAFL 2 15 SNRL
X6 X2
AS1 3 14 MNBL LDAT
X X1
MNRL LST
SRFL 4 13
X7 X0
MRFL 5 12 SNBL RTCCK
X5 X3
6
11 ASL0
INH A
7 10 ASL1 CNVSS
VEE B
8 9 ASL2 RTCCE
VSS C
DOTK MOND
DSHK IC2 RESET
CD4051BPWR
PHNI
C207 0.1
3.26V
AVXL_ 1 16 3R3V
X4 VDD
BRIT_ 2 15 DRVL_
X6 X2
SQSS 3 14 CMPL_
AS2
X X1
MSND 4 13 MONL_
X7 X0
CNTL_ 5 12 VOXL_
8V
X5 X3
6 11 ASL0
INH A
7 10 ASL1
VEE B
8 9 ASL2 LEDV
VSS C
BKLS
IC3
CD4051BPWR
MAPL
0.28V
C205 0.1
KI0 1 16 3R3V
X4 VDD
2 15
KI2 SNCL
X6 X2
AS3 3 14 SAPL CFLV
X X1
4 13
KI3 MNCL
X7 X0
KI1 5 12 PITL
X5
X3
6 11
ASL0
INH A
7 10 ASL1
VEE B
8 9 ASL2
VSS C
IC4
CD4051BPWR
C15V
KI7 KI7 8V
MSND
C206 0.1
KI8 1 16 3R3V
X4 VDD
2 15
KI10 KI6
X6 X2
AS4 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
CD4051BPWR
8V 8V
MSND MSND
J301
CFLH CFLH
GND
J5
66
7.26V Q209
2SB1201
LDPS +15V
RESET
D10
MAZ8033GH
3.98V
Q210
14.88V
2SC4081
R326
220
R603 R604 IC601
47k 10k RX-4581 C221
3.52V
1 0.1
22 5V
GND NC
C211
2 21
NC
CE1 0.1
RTCCE 3
20
D602 CE0 NC
RTCDT 4 19
MA2S1110G NC
DI R328
5 18
DO NC 68k
RTCCK 6 17 1 5
NC
CLK
RTCIRQ 7 16 2
/TIRQ NC
3
C601 8 15 4
NC
10 /AIRQ
9 14
3.28V
FOE NC R327
10 IC202 15k
FOUT TC7SET08FU
11
VDD
C602
R343
0.1
47k
3R3V 3R3V
LDPS
PWRK
L205
HF50ACC322513
2.2k
47k
D12
RB706F
C232
0.1
C230
0.0047
R369 0
CNTV 1
P94/DA1
2
P93/DA0
3
P92/TB2IN
4
P91/TB1IN
5
P90/TB0IN
6
BYTE P20/A0(/D0/D-)
7
CNVSS P21/A1(/D1/D0)
8
P87/XCIN P22/A2(/D2/D1)
9
P86/XCOUT P23/A3(/D3/D2)
10
RESET P24/A4(/D4/D3)
11
XOUT P25/A5(/D5/D4)
12
C203 VSS P26/A6(/D6/D5)
13
12p IC6
XIN P27/A7(/D7/D6)
C204
14 M30622M6P-535GP(SX-3009B-1)
VCC
12p
15
C224 P85/NMI P30/A8(/-/D7)
RTCIRQ 0.1 16
P84/INT2
RSB 17
P83/INT1
X1 RSA 18
P82/INT0
CR-567
SSB 19
9.8304MHz P81/TA4IN
SSA 20
P80/TA4OUT
MSB 21
P77/TA3IN
MSA 22
P76/TA3OUT
TMD_ 23
P75/TA2IN
24
LEDV
P74/TAOUT
BKLS 25
P73/TA1IN
CFLV
R501 47k
R502 47k
R329 10k
R503 47k
RESET
CFBD_
C15V C15V
TDTS
8V 8V
MSND MSND
RESET RESET
3R3V
J4 J7
to VR-D board J1 to SW-B board J1 to FLASH writer
L210 L211
D10F-A814AY 9.11V D10F-A814AY
Q204
2SB1201
R339 22
2.7V
R340 22
C213
D9
10.55V 47
MAZ8047GM
C214
10
Q203
R208
2SC4081 Q201
T201
220 2SC3647
3319-T088
1
5V
C210 0.1
2
3
R212 C212 C201 4
68k 10
1 5 Q205 0.12 5
Q212
DTC114EU
2 R213 DTC114EU 6
15k
3 4
Q202
IC201 2SC3647
AT29LV040A-15TU (SX-2590F-4)
4.81V R200 CFLH
1k
3R3V
R342
47k
C226 KI6
0.1 KI5
KI4
3R3V 3R3V
R335 82k
R336 82k
BKLS R337 82k
LDPS LDPS R338 82k
C15V
PWRK 5V
SO
RTCCK
TDTS
LST
LDPS
3R3V
MAPL
MNCL
MP2B R298 1k
MP2A R297 1k
75 SATK MP1B R296 1k
P13/D11-
74 MLCK
MP1A R295 1k
P14/D12-
73
P15/D13-
72 MTSK
SP1A R294 1k
P16/D14-
71 MATK SP1B R293 1k
P17/D15-
70 VMK SP2A R292 1k
69 MPWK SP2B R291 1k
68 DWK SNCL
67 UPK SAPL
66 MWK PITL
65 MPRK SATK
64 SUBK SLCK
63 CHGK
MLKC
62 SSPK
VSS
61 MINK
P2ST
60 STSK
VCC
59 EQRK
MTSK
P31/A9
58 XFCK KI0
P32/A10
57 RECK KI1
P33/A11
56 PLYK KI2
P34/A12
55 EXTK KI3
P35/A13
54 MSCK
P36/A14
53 DATK
P37/A15
52 AMK
P40/A16
51 RTYK
P41/A17
C231
0.1
MSA R255
MSB R256
5V
3.20V
2.40V
Q502
DTC114EU
LG_RES
Explanatory notes
VOLTAGE LINE Q503
DTC114EU
LG_PWR
LDPS
P2ST
2.70V 3.26V
CFBD_
C15V
7.94V
8V 8V
MSND MSND
RESET 5V
C220
0.1
14.91V
8V
RESET
C228
C15V 10
3R3V
C215
0.1
3.23V 3R3V
LG_RES
R651 IC651
C216 56k R3112N281A
3.29V LG_PWR
0.1
1 5
OUT CD
R239
2
VDD
3 4 R240
VSS NC
5.50V
R652 C652 C651
33k 0.027
0.1
C218
47
0.28V
C202
15p
12 CFLH
11
8
7
J1
3R3V
R259 1k KI6
R260 1k KI5
R261 1k KI4
GND
GND
R331 47k
SSA SSA
R332 47k
SSB SSB
RSA R333 47k RSA
RSB R334 47k RSB
NC
UPK R262 1k UPK
DWK R263 1k DWK
VMK R264 1k VMK
MPWK R265 1k MPWK to TENKEY
MWK R266 1k MWK board J1
R267 1k
MPRK MPRK
XFCK R268 1k XFCK
R269 1k MINK
MINK
EQRK R270 1k EQRK
SUBK R271 1k SUBK
CHGK R272 1k CHGK
NC
R273 1k LDAT
R274 1k LCK
R275 1k LOE
R276 1k LST1
NC
NC
LDPS
5V L209
HF50ACC322513
J2
C229
0.1 5V
NC
R301 1k
MAPL
R300 1k MNCL
NC
NC
R302-R309 10k
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
47k MSA MAIN
47k
MSB
SENSOR
5V
MESUREMENT CONDITIONS
voltage at RX
Digital tester
range: input impedance
200mV: 100MW
2V: 11MW
20V,200V,1000V: 10MW
J302
LDPS
CFBD_
to CF
board J3
GND
Explanatory notes
VOLTAGE LINE
4.89V
L204 J203
10m
VDD5VF
NC
GND
MSND
8V
NC
L208
C227
HF50ACC322513
0.1 C15V
C15V
L203 C15V
HF50ACC322513
GND
to LOGIC
GND
unit J805
L201 10m
+3R3V
LG_RES
NC
LG_PWR
NC
1k
LTXD
1k LRXD
GND
GND
C219
0.001
C217
0.1