Icom IC-7700 Service Manual page 98

MAIN UNIT (MAIN-1)
To LOGIC UNIT J826
To LOGIC UNIT J809
5 6
SPDI
SPDO
SPDI
SPDO
+15V
KEY
KEY
EXRL1
EXRL1
EXRL2
EXRL2
SQLA
SQLA
+5V
+5V
D3R3V
+8V
D11
RTYK
RTYK
SENI
1SS355
D1
SEND
SEND
1SS355
RTKI
Q1
2SC4081
Q11
2SC4081
R22
Q21
150
2SD1619 Q22
DTA114EU
ASND
TRVI
R32
TRV
TRV
10K
AMOD
BAND
L231 100U +5V
R235 10K
IC231
1 14
O P+INA OP+INB
2 13
OP-INA OP-INB
3 12
R231 C232 OPOUTA OPOUTB
AAF 4 11
AAF EVROUTA EVROUTB R245
1K 1 5 10
VCNTA REFIN
6 9
VCNT B VREF
7 8
V+ GND
NJM2172V
C243
C241 330P
R242 68K
10 16V
R243
6
R241
7
R244 10K
IC241 5
1K
UPC4570G2
10K
I NTSP
EALC
SPO
SPO
SPE
SPE
To MAIN-4
J841
R841
SPE
8
I NTSP
0 RL261
7
AF E UA2-12NU
6
AFO
5
PHE
4
PHO
3
M ICE EP842 M PZ1608S221A Q261
2
MICI 2SC408 1
1
EP843
MPZ1608S221A
B 8B-PH-SM4-TB
To RF UNIT J2006
R560
100K
SATT
D3R3V
+8V
To MAIN-2
+15V
D3R3V
D3R3V +8V
-12V_
MCK
FANV
MSTB1 FANV
MDAT
ASTB1 MDAT
MMUT
DRESL
MMUT
AFGV2 MCPS
AFGV2
MCPS
AFGV1 SMUT
AFGV1
SMUT
PHL2 SPON
PHL2
SPON
PHL1
AFON
PHL1 AFON
RAMS
RAMS
SATT VD
SATT VD
DRIV ALCL
DRIV ALCL
M IGV FORV
MIGV FORV
AAFV REFV
AAFV REFV
MODV T8V
MODV
T8V
IDL
IDL
BAND VDL
BAND
VDL
ALC
IDLV ALC
EALC
IDHV EALC
AMOD
+5V
D3R3V
+8V
-12V
100 R251 R252
UPC4570G2
8 IC241
100K 100K
V+ 2
R253
GND 1
R256
4 3
470
R246 100
IC241
100K
U PC4570G2
10
IC281 LA4485 RAMS
R261
220
C281
DTC114TU
Q281
1000
R262
1K
R271 C272
0.1
4.7
R272 CPH3403
0
To LOGIC UNIT J808
EP1498
M PZ1608S221A
MIGV
R192
C191
1
R193
C192
R196
MODV
-12V
ANVOX
10
AAFV
C314
IC311
1 14
O P+INA OP+INB
2 13
OP-INA OP-INB
3 12
R311 OPOUTA OPOUTB
4 11
EVROUTA EVROUTB
5 10
4.7K VCNTA REFIN
6 9
VCNTB VREF
7 8
V+ GND
Q301
NJM2172V
CPH3403
R315
4.7K
Q291
To DC-DC UNIT J3
11 10
C400
0.0047
R173
0
R171
R180
C171 R172
0
1 4.7K IC171
1
O P+INA
C173 2
Q810
R175 OP-INA
82P 3
2SC408 1
R161 OPOUTA
220K 4
R176 EVROUTA
220 10K 5
VCNTA
6
R162 VCNTB
7
V+
1K
NJM2172V
C221 220P R225
C195 R195 R221 IC221
10K 1 15K 1
100K
2
3
4
4.7K
0.0022
R224
15K
IC201
R213
1 8
IC211
2 7 1
3 6 2
4 5 3
22K 4
TC4W53F
TC4W53F
Q201
DTC114EU
Q211
D TC114EU
IC331
UPC4570G 2
R331
15K
6
7
5
IC331
C331 UPC4570G 2
0.0033
1K
R337 R338
10K
R354
2
1
R339 3.3K C361
3
IC331
UPC4570G 2 10K 0.1
NJM2125F
5 R365
1
IC361
R361 R362
4
47K
3
22K 150K
R366
D361 R363 2
1SS355 1.5K 10K
10 - 8
To LOGIC UNIT J810
To RF UNIT J150
DACK
5 6
R801
560
R803
560
DACK
R181
10K
10K
14
OP+INB
13
OP-INB R182
12 MRE C
To MAIN-3
OPOUTB
11 1K
EVROUTB R473
10 MRECE
REFIN
9 0 FRWT R428 100
VREF FRWT _
8 DSPC K R401 100
GND CLKR1_
MIC_IN R402 100
CLKX1_
RXAF R403 100
RXAF_OUT
VSQL R404 100
VOICE_SQL
DRESD R405 100
/RESETD
M IC_IN R406 100
MICIN
AGCOUT R407 100
AGC_OUT
100 C224 AGCDET R408 100
AGC_DET
C226 10 RXDET R409 100
DET_OUT
8 R226 0.1 ANVOX R410 100
ANVOXIN
7 100 TXIF R411 100
I FOUT
6 RXIF R412 100
RXIF_
5
DACK R413 100
DACK_
RTD R414 100
RTTYOUT_
U PC4570G2 DSPR R415 100
DR1_
-12V NSQ R416 100
NOISESQL_
100 DFR R417 100
FSR1_
TDE T R418 100
FMTONE_DET
DX 1 R419 100
DX1_
DFX R420 100
FSX1_
DSKY R421 100
R216 C213 KEYIN
MPLAY DAVOX R422 100
ANVOXOUT
33K 1
8
R217 MPLAYE CTFL R424 100
CWSTAT
7 0 DULS R425 100
UNLOC K
6 MPZ1608S221A D3R3V
D3R3V
5 EP426
+A15V
EP428 M PZ1608S221A
+A5V
EP429 M PZ1608S221A
+D5V
HSK0_ R426 100
HSK0
HSK1_ R427 100
HSK1
-A12V
EP430
M PZ1608S221A
GND
SQLS
THML EP851 MMZ1608Y102BT THM L
1
IDHV EP852 IDHV
MMZ1608Y102BT
2
IDLV EP853 MMZ1608Y102BT IDLV
3
T8V EP854 M PZ1608S221A T8V
4
VD EP855 MMZ1608Y102BT VD
5
6
J851
B6B-PH-SM4-T B