Icom IC-7800 Service Manual Addendum page 312

Jul. 2008
MAIN UNIT
MAIN UNIT (1)
D3 L56 F3
1 2 +15V
J9 DSM3MA4 EXCCL3225U
DC OUT
D4 F2 F1
(MAX 1A)
DSM3MA4 S-N5054 S-N5054
C80 L80
100p BLM31PG121SN1
J1
SQLS L6 100
RTTY L1 100
13.8V L7 HF50ACC322513
6 7
ALC L2 100
MAIN SEND L3 HF50ACC322513
1 8 3
ACC(1) MOD L4 100
AF L5 100
4 5
GND
2
J2
TRV L10 100
13.8V
6 7
8V L9 HF50ACC322513
SEND
MAIN
1 3
ACC(2)
BAND L8 100
ALC
4 5
L21 HF50ACC322513
2
J3
SQLS L16 100
RTTY L11 100
13.8V L17 HF50ACC322513
6 7
ALC L12 100
SUB SEND L13 HF50ACC322513
1 8 3
ACC(1) MOD L14 100
AF L15 100
4 5
GND
2
J4
TRV L20 100
13.8V
6 7
8V L19 HF50ACC322513 +8V
SEND
SUB
1 3
ACC(2) BAND L18 100
ALC
4 5
L22 HF50ACC322513
2
EALC
RL50
ALC ADJUST
OMR-109F
R52
J5 10
SEND
Q50
RELAY
DTC114TU
IC50
ALC
PS7122AL
R53 390
Q51
DTC114TU
J6
L52 100
METM
METER OUT
MAIN(TX)/
L53 100
SUB METS
RL140 Q141
NA-12W DTC114EU
J140
L141 R149
MAIN
EXC-ELDR25C 220
SP OUT
IC140 14.9V
J141
LA4485
L142
SUB
EXC-ELDR25C
SP OUT
L143
J142
EXC-ELDR25C
SPE C144 1000
to LOGIC
SPO C145 1000
unit J822
J490
REF I/O
J491
to OSC
unit J71
D51
RB706F
R54 2.2k
J7
R55 2.2k
MEMORY
KEYER
VOICE
RECORD
Q52
R57 2SC4081
33k
D52
+3R3V
1SS355
J8
L55
+8V +8V
100
KEY
KEY +3R3V
+5V
+8V
+15V
IC495 -12V
SN74LVC1G08DCKR
3 4
GND Y
2
B
1 5
A VCC
J495
OUT
L495
GND L456 EXCCL3225U
47
VCC +5V
L454 BLM31PG121SN1
L455 BLM31PG121SN1
J496 L453 EXCCL3225U
L496
GND L452 EXCCL3225U
47
VCC L451 LW16
IN L450 EXCCL3225U
J901
SPDO
Explanatory notes
GND
to LOGIC
SPDI
unit J826
GND
+8V
+3R3V
R584
10k R211 10k
C210
DSPTHRML
1
D1 D2
SQLAM
1SS355 1SS355 R212
4.7k
Q1
DTC114TU
C213
0.0022
Q3 Q4
2SC4081 2SC4081
+3R3V
R221
Q6
Q5 10k
2SD1619 R11
150 DTA114EU
C220
+8V
1 R222
4.7k
R223
1k
Q2
DTC114TU -12V
SQLAS +15V
11
IC1 GND
NJM2058M V+
4
R15 R35
47k 15k
R37
R13
100
2.2k
TRVI
Q7
C37
2SC4081
10
Q8
2SC4081
R18 R17 R16
470 100k 100k R40
15k
R21 R20 R19 2
1 -
470 100k 100k 3 BNDM R42
IC1 +
100
NJM2058M
6
C39
7 -
5 BNDS 10
+
IC1
NJM2058M Q9
2SC4081
EALC
EXRL1
R32
EXRL2
10k
AAFVA
AAFVB
+15V +15V
R31
+5V +5V
10k
R165 100k
R166
R160 R162
9 470
1k 100k - 8 ANVOX
10
+
IC1
NJM2058M
R172 100k
R173
R167 R169
13 470 METM
1k 100k - 14
MAMS
12 METS
+
SPON
IC1
NJM2058M
R139
10k
MAMS
SPON
Q131
CPH3403
Q140
2SD1801 C134
+15V
0.082
IC105
NJM2172V C121
10
1 14
OP+INA OP+INB
2 13
C123 OP-INA OP-INB
3 12
1 OPOUTA OPOUTB
4 11
EVROUTA EVROUTB R120
5 10
VCNTA REFIN 10k
6 9
VCNTB VREF
7 8
V+ GND
R137 R133
2.2k 4.7k
C127 C124
1 1
C128
1
Q132
CPH3403
Q143
DTC114TU
AFON
-12V
+15V
RL141
+8V
NA-12W
+3R3V
+5V
Q142
DTC114EU
MAFS
D141
1SS355
IC180
NJM2172V
EPAD 1 14
OP+INA OP+INB
MUTEI 2 13
R184 1.8k OP-INA OP-INB
PHML2 3 12
OPOUTA OPOUTB
KEY 4 11
R183 1.8k EVROUTA EVROUTB
+3R3V PHML1 5 10
VCNTA REFIN
+5V PHSL1 6 9
VCNTB VREF
+8V 7 8
R185 1.8k V+ GND
+15V PHSL2
-12V
R186 1.8k
R195 C185
1k 10
+8V
J450
GND J411
VDD5 CIVE
IC181
EP421
TC4W53F
GND CIV CIV
+3R3V CIVE 1 8
+3R3V VDD5
EP420
+3R3V CIVE CIVE 2 7
+5V NC
R192
+8V CIV5V 3 6
27k
EP417
+15V LED0 LED0
-12V LED1 4 5
EP416
GND GND LED1
C188
10
VOLTAGE LINE
TX LINE
RX LINE
+15V +15V
+8V +8V
+3R3V +3R3V
+5V +5V
C221
10
8.89V Q810
2SC4081
C216
1
R204 100
R201 10k
IC821
NJM2172V
C217
1
82p OP+INA OP+INB
C215
2
1 OP-INA OP-INB
3
OPOUTA OPOUTB
4
C203 R202 R203 EVROUTA EVROUTB
R216
5
33k 1 4.7k 220k VCNTA REFIN
6
VCNTB VREF
7
V+ GND
R249 C249 R235
R472 10k 0.1 0
47k
C222
2.2 C226
R218 15k
1
R228 15k
-12V -12V
+15V +15V
+8V +8V
+3R3V +3R3V
+5V +5V
IC3
C28
TC4W53F
10
1 8
R34 C34
IC4 2 7
1k 1
NJM2172V
1 14 3 6
OP+INA OP+INB
2 13
OP-INA OP-INB R47
3 12 4 5
10k
OPOUTA OPOUTB
4 11
EVROUTA EVROUTB
2.82V 5 10
VCNTA REFIN
6 9
IC5
VCNTB VREF
C29
7 8 TC4W53F
V+ GND 10
1 8
R39 C35
1k 1
2 7
+8V
3 6
4 5
2.81V
8 8
IC2 V+ IC102 V+
PC4570G2 PC4570G2
GND GND
4 4
-12V
MAMS MAMS
IC100
C129 R104 Q100 R157
TC4W53F
0.0033 10k 2SJ144 2.2k
1 8 +8V
R114 R101
2 7
10k 4.7k
3 6
R159
1k 2
1 - 4 5
3
+
IC102
MAIN side
PC4570G2
SQL open : 3.03V
1.3mV close : 6.1mV
C130 R109 Q101 R158
0.0033 10k 2SJ144 2.2k
IC101
R116 R106
TC4W53F
10k 4.7k
1 8
R174
2 7
1k 6
7 -
5
+ 3 6
IC102
SUB side
PC4570G2
4 5
SQL open : 3.03V
1.7mV close : 6.1mV
SAMS
EALC
-12V -12V
+15V +15V
+8V +8V
+3R3V +3R3V
+5V +5V
R65 220k
IC191
TC4W53F
D62 R66
1 8 1SS355 100 13
14 -
12
+
IC60
2 7
NJM2058M
CP82
3 6
R72 330k
R181
4 5
10k
6
7 -
5
IC60 +
C206
NJM2058M
0.0018
R74 220k
R189
10k
IC192
R176 9
TC4W53F
- 8
1.2k 10
1 8 +
IC60
NJM2058M
2 7
IC182
D63
TPA6111A2DGN 3 6
1SS355
1 8
VO1 VDD
2 7 4 5
IN1- VO2
3 6
BYPASS IN2-
4 5
GND SHUTDOWN R194
C207
27k
0.0018
R89 Q62
C189 R193
1k 2SA1576
10 1k
R88
1k
+15V
+8V
+3R3V
+5V
C234
220p
R232
IC201 IC460
100k
TC4W53F TC4W53F
14 1 8 1 8
13
12 2 7 2 7
11
10 3 6 3 6
9
8 4 5 4 5
-12V
+15V
+8V
+3R3V
+5V
L480 L481 L482
HF50ACC322513 HF50ACC322513 HF50ACC322513
2.31V 2.30V
IC450 IC451
SI-3012KS SI-3012KS
1 8 1 8
VC GND VC GND
2 7 2 7
C480 22 VIN GND C483 22 VIN GND C486 22
3 6 3 6
VO GND VO GND
4 5 4 5
C481 22 ADJ GND C484 22 ADJ GND C487 22
R450 22k R451 22k R452 22k
R25
-12V
1k
+8V
C57 330p
R24 68k IFIN_A
R22
10k
2 IC490
1 -
TC4W53F
3
+
IC2 1 8
R23
PC4570G2
10k
R29
2 7 DIFA
1k
C58 330p
IC550
R28 68k 3 6 MON
TA79L05F
R26
10k
6 4 5 MONS
7 - I
5
+ R490 COM
IC2
1k
R27
PC4570G2
10k
-9.63V
+3R3V
L250
IC251
TD62783AF
IC250 1 18
IN1 O1
CD74HC4094M 2 17
IN2 O2
1 16 3 16
STROBE VCC IN3 O3
2 15 4 15
DATA OE IN4 O4
3 14 5 14
CP Q4 IN5 O5
4 13 6 13
Q0 Q5 IN6 O6
5 12 7 12
Q1 Q6 IN7 O7
6 11 8 11
Q2 Q7 IN8 O8
7 10 9 10
Q3 QS2 VS GND
8 9
GND QS1
IC261
TD62783AF
1 18
IC260
IN1 O1
CD74HC4094M 2 17
IN2 O2
1 16 3 16
STROBE VCC IN3 O3
2 15 4 15
DATA OE IN4 O4
3 14 5 14
CP Q4 IN5 O5
4 13 6 13
Q0 Q5 IN6 O6
5 12 7 12
Q1 Q6 IN7 O7
6 11 8 11
Q2 Q7 IN8 O8
7 10 9 10
Q3 QS2 VS GND
8 9
GND QS1
3.17V 4.78V 7.97V -11.7V 14.8V
-12V
+15V
+8V
+3R3V
+5V
R123 4.7k
R124 4.7k
D61
1SS355
R64
REFV
10k
+8V IC104
PC4570G2
R61 R60 D60
68k 22k 1SS355
Q61
IC104
DTC144TE 4.0mV
IDLV PC4570G2
Q60
UMH11N
R67 7
R71
4 3 4
47k
47k -
IDHV V+
IC60
GND Q63 Q64 2 5
NJM2058M
R69 DTC114TU DTA144EE
11
RH03ADCS2X R245
1 6
6.8k
IC104
PC4570G2
R851
R198
470
47k 1
IDLV
-
50MS
R84
R92 R85 3.3M 220k
330 R248
5.3mA
6.8k
D64 R86
Q474 R476
MA2S728 330 2 CP81
-
1 2SA1576 470k
3 POCV
IC61
+
NJM2058M
IC60 R77 R76 R75
13
NJM2058M 220k 33k 22k
-
Q476 12
+
DTC114TU
C61 1
C62 1
63
BUS LINE1
+15V
+15V
+8V
+8V
+3R3V
+3R3V
+5V
+5V
-12V
R234 C233
100 1
IC230
PC4570G2
1 8
2 - + 7
3 6
+ -
4 5
-12V
+15V
+8V
+3R3V
+5V
2.31V
IC452
SI-3012KS
1 8
VC GND
2 7
VIN GND
3 6
VO GND
4 5
ADJ GND
-12V
+8V
1.7mV
-4.94V R560 R561
100k 100k
R549
10k
O
+3R3V
EXCCL3225U +15V
R250 10 TXB0 MAIN
R251 10 TXB1
UNIT
R252 10 TXB2
(2)
R253 10 TXB3
R254 10 TXB4
R255 10 TXB5
R256 10 TXB6
R257 10 TXB7
R270 10 TXB8
R271 10 TXB9
R272 10 TXB10
R273 10 MODS
R274 10 HFS
R275 10 50MS
R276 10 AMS
R277 10
BUS LINE2
-12V
+15V
+8V
+3R3V
+5V
BUS LINE3
MESUREMENT CONDITIONS
voltage at RX(no instrudion)
8 4
frequency : 14.1 MHz
V+ IC61 V+
mode : J3E(USB)
NJM2058M ANT(RX) : no input
GND GND
(TX) : no modulation
4 11
SCOPE ATT : 0dB
Digital tester
R243
range : input impedance
1k
200mV : 100M
5 MPLAY
+
2V : 11M
6
20V,200V,1000V : 10M
IC61
NJM2058M
R90
2
1M - 1
3
+
R246
1k
3 SPLAY
+
2
C68 0.001
R97 6.8M
IC61
R96
NJM2058M
IC61
3.3M
NJM2058M 9
-
8
6 10
14 - 7 +
5
+
IDLV
ALC
BUS LINE4