Icom IC-7800 Service Manual page 195

MAIN UNIT (3)
BUS LINE1
+15V
+15V
+8V
+8V
+3R3V
+3R3V
+5V
+5V
-12V
-12V
T8V
T8V
J961 J381
GND1T
GND1T
J380 J921 MCLK
GND1T
AFIN AFIN DSPCK
ANVOX ANVOX DRES
GND DSPR
GND DSKY
TX36K TX36K DFRT
GND CTFL
GND DSPCK
L380
GND DAVOX
HF50ACC322513
+A5VT DX1T
+A5VT DVOX
GND DFXT
DSP-TX
GND FRWT
BOARD
-12V GND1T
-12V -12V GND1T
GND D3R3V
GND D3R3V
L381
+D5VT GND1T
HF50ACC322513
+D5VT GND1T
GND D1R2V_T
GND D1R2V_T
+15V D1R2V_T
+15V +15V D1R2V_SENS_T
GND1T
GND1T
GND1T
GND1T
J961 J341
GND1A
GND1A
J340 J921 MCLK
GND1A
AGCDET_A AGCDET_A DSPCK
IFIN_A IFIN_A DRES
GND DSPR
GND RTDA
AFOUT_A AFOUT_A DFRA
AGCOUT_A AGCOUT_A NSQA
GND VSQA
L341
GND DULSA
HF50ACC322513
+A5VA DSPCK
+A5VA GND1A
MAIN GND DX1A
DSP-A
GND TNDA
UNIT
BOARD
-12V DFXA
(2)
-12V -12V FRWT
GND GND1A
L340
GND GND1A
HF50ACC322513
+D5VA D3R3V
+D5VA D3R3V
GND GND1A
GND GND1A
+15V +15V D1R2V_A
+15V D1R2V_SENS_A
D1R2V_A
D1R2V_A
GND1A
GND1A
J961 J361
GND1B
GND1B
J360 J921 MCLK
GND1B
AGCDET_B AGCDET_B DSPCK
IFIN_B IFIN_B DRES
GND DSPR
GND RTDB
AFOUT_B AFOUT_B DFRB
AGCOUT_B AGCOUT_B NSQB
GND VSQB
L361
GND DULSB
HF50ACC322513
+A5VB DSPCK
+A5VB GND1B
GND DSP-B DX1B
GND TNDB
BOARD
-12V -12V DFXB
-12V FRWT
GND GND1B
L360
GND GND1B
HF50ACC322513
+D5VB D3R3V
+D5VB D3R3V
GND GND1B
GND GND1B
+15V +15V D1R2V_B
+15V D1R2V_SENS_B
D1R2V_B
D1R2V_B
GND1B
GND1B
Explanatory notes
VOLTAGE LINE
TX LINE
RX LINE
BUS LINE2
+15V
+8V +15V L400 HF50ACC322513
+3R3V
+5V
-12V -12V L402 HF50ACC322513
T8V
+3R3V L401 HF50ACC322513
AGCDET_A EP403
AGCOUT_A EP404
+8V
MCK R400 220
MDAT R401 220
RSTBA R402 220
MCLK
+15V L405 HF50ACC322513
DSPCK
DRES
DSPR -12V L407 HF50ACC322513
DSKY
DFRT +3R3V L406 HF50ACC322513
CTFL AGCDET_B EP408
DSPCK AGCOUT_B EP409
DAVOX +8V
DX1T
DVOX
DFXT MCK R403 220
FRWT MDAT R404 220
RSTBB R405 220
C384
100
R381
DIFA
1
D1R2V_T
D1R2V_SENS_T IFIN_B
C494 470
Q491
C498 470
2SB1132
+15V
R495
R512
IC491
180
56k
NJM2058M
Q490
DTC114EU
13
- 14
R398
12 +
8.2
D490 R565 R489
MA77 47k 3.3k
1st Lo IN
2 IC491
- 1 NJM2058M
3
+
R557
R499 150k
5.6k SCPT
R498 150k
R522
MCLK IC491 6
IC491
10 - 7
NJM2058M
5 + NJM2058M 2nd Lo IN
DSPCK
4
DRES
V+
9
DSPR - 8 IC491
GND
10
+ NJM2058M
RTDA 11 3nd Lo IN
DFRA
NSQA MCLK
VSQA b (to MAIN unit (2))
DULSA YGR OUT
c (to MAIN unit (2))
DSPCK d (to MAIN unit (2))
e (to MAIN unit (2))
DX1A f (from MAIN unit (2))
TNDA g (from MAIN unit (2)) TRV OUT
DFXA
FRWT
THML EP430
IDHV EP431
IDLV EP432
T8V L435 HF50ACC322513
D1R2V_A
D1R2V_SENS_A
R487 0
DRES R410 100
R485 0
R486 0
DFXS R413 100
C344 R342
DFRS R414 100
100 1
DXIS R415 100
FRWT R416 100
SYNCIO
SDAT R417 100
SCK R418 100
SST1 R419 100
SPSO R420 100
SST2 R421 100
+3R3V L410 EXCCL3225U
-12V L411 HF50ACC322513
MCLK L412 EXCCL3225U
+5V L413 HF50ACC322513
DSPCK
DRES
DSPR T8V EP414
RTDB +8V
DFRB SMUT R422 100
NSQB SATT EP415
VSQB SSB R423 100
DULSB SSA R424 100
DSPCK
DX1B
TNDB
DFXB
FRWT
RXMREC
RXSREC
MPLAY
D1R2V_B SPLAY
D1R2V_SENS_B
MREC
MPLAY
C364 R362
100 1
MICI L440 HF50ACC322513
C442 0.0047 L441 HF50ACC322513
PHOS
PHOM
MICAF
J400
GND
+15V
+15V
NC
-12V
NC
+3R3V
AGCOA
from/to
AGCIA RXPLL-A
unit J1701
+8V
GND
GND
MCK
MDAT
RSTBA
GND
J403
GND
+15V
+15V
NC
-12V
NC
+3R3V
AGCOB from/to
AGCIB RXPLL-B
unit J1701
+8V
GND
GND
MCK
MDAT
RSTBB
GND
J401
DIFA
NC from RXPLL-A
GND unit J1501
J404
DIFB
NC
from RXPLL-B
unit J1501
GND
J492
DFAN
to CHASSIS
unit MF1
J399
DACK from RXPLL-B
unit J681
J503
from RXPLL-A
unit J421
J808
to SCOPE
unit J11
J502
from RXPLL-A
unit J561
J501
from RXPLL-A
unit J681
J801
to PA200W
board J1
J802
to BPF
unit J107
J430
THML
IDH
IDL to PA200W
board J2
PAT8
GND
J410
DGND
DRES
DSPCK
SDR1
DFXS
DFRS
DXIS
FRWT
SYNCIO
DGND
SDAT
SCK
SST1
SPSO
SST2
to SCOPE
AGND
unit J4
+3R3V
+3R3V
-12V
+3R3V
+5V
AGND
AGND
T8V
+8V
SMUT
SATT
SSB
SSA
AGND
J451
RXMREC
RXMRECE
RXSREC
RXSRECE
MPLAY
MPLAYE
SPLAY
to LOGIC
SPLAYE unit J810
MICREC
MICRECE
MICPLAY
MICPLAYE
GND
J440
MICI
MICE
PHOS
PHE
to VR-A
PHOM
board J2
PHE
AFO
AFE
11 - 11