Icom IC-7800 Service Manual Addendum page 72

Dec. 2009
MAIN UNIT (1)
F3
D3 L56
1 2 +15V
J9 DSM3MA4 EXCCL3225U
DC OUT
D4 F2 F1
(MAX 1A)
DSM3MA4 S-N5054 S-N5054
L80
C80
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
+8V
MAIN SEND
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
SEND L13 HF50ACC322513
SUB
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
SUB SEND
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
METER OUT METM
MAIN(TX)/
L53 100
SUB
METS
SPON
RL140 Q141
NA-12W DTC114EU
+15V
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 D141
1SS355
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 VOLTAGE LINE
unit J826
GND
TX LINE
RX LINE
+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
10k
R11 Q5
2SD1619
150 DTA114EU
C220
1 R222
4.7k
C222
2.2
R223
1k
Q2
DTC114TU -12V -12V
SQLAS +15V +15V
11 +8V
GND +3R3V
IC1
NJM2058M
V+ +5V
4
R15 R35
47k 15k
R13 R37 R34
100
2.2k 1k
Q7 TRVI
C37
2SC4081
10
Q8
2SC4081
R18 R17 R16
2.82V
470 100k 100k
R40
15k
2
R21 R20 R19
1 -
470 100k 100k 3 BNDM R42 R39
+
IC1 100
1k
NJM2058M
6 C39
7 -
5 BNDS 10
IC1 +
NJM2058M Q9
2SC4081
EALC
2.81V
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
Q131 R159
CPH3403 1k
Q140
2SD1801 C134
0.082
IC105
C121
NJM2172V
1.3mV
10
1 14
OP+INA OP+INB
2 13
OP-INA OP-INB
C123
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 R174
2.2k 4.7k 1k
C127 C124
1 1
C128
1.7mV
1
Q132
CPH3403
Q143
DTC114TU
AFON
-12V
+15V
RL141
+8V
NA-12W
+3R3V
+5V
Q142
DTC114EU
MAFS
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
GND CIV CIV TC4W53F IC182
+3R3V CIVE 1 8 TPA6111A2DGN
+3R3V VDD5 1
EP420 VO1
+3R3V CIVE CIVE 2 7 2
IN1-
+5V NC 3
R192 BYPASS
+8V CIV5V 3 6 4
27k
EP417 GND
+15V LED0 LED0
-12V LED1 4 5
EP416
C189
GND GND LED1
10
C188
10
+15V +15V
+8V +8V
+3R3V +3R3V
+5V +5V
C221
10
8.89V Q810
2SC4081
C216
1
R204 100
R201 10k
IC821
NJM2172V
C217
1 14
82p
OP+INA OP+INB
C215
MAZ8091GM 2 13
1 OP-INA OP-INB
3 12
OPOUTA OPOUTB
4 11
C203 R202 R203 EVROUTA EVROUTB
R216
5 10
1 4.7k 220k
33k VCNTA REFIN
6 9
VCNTB VREF
7 8
V+ GND
R249 C249 R235
R472 10k 0.1 0
47k
C226
R218 15k
1
R228 15k
-12V
+15V
+8V
+3R3V
+5V
IC3
L480
C28 TC4W53F
HF50ACC322513
10
1 8
C34
2 7
IC4
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
5 10
VCNTA REFIN
6 9 IC5
VCNTB VREF C29
7 8 TC4W53F
V+ GND 10
27k
1 8
C35 R25
1 1k
27k
2 7
+8V
3 6
4 5
8 8
R29
V+ V+
IC2 IC102
1k
PC4570G2 GND PC4570G2 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
2
1 - 4 5
3
+
IC102
MAIN side
PC4570G2
SQL open : 3.03V
close : 6.1mV
C130 R109 Q101 R158
0.0033 10k 2SJ144 2.2k
IC101
R116 R106 TC4W53F
10k 4.7k
1 8
2 7
6
-
7
5
+ 3 6
IC102
PC4570G2 SUB side
4 5
SQL open : 3.03V
close : 6.1mV
SAMS
EALC
-12V -12V
+15V +15V
+8V +8V
+3R3V +3R3V
+5V +5V
R65 220k
IC191
R64
TC4W53F
D62 R66
10k
1 8 1SS355 100 13
-
14
12
+
IC60
2 7
NJM2058M R61
CP82
68k
3 6
R72 330k
R181
4 5
10k
6
7 -
5
+
C206 IC60
NJM2058M
0.0018
R74 220k
R189
10k
IC192
R176 9
TC4W53F
- 8
1.2k
10
1 8 +
IC60
NJM2058M
2 7
D63 R92
3 6
1SS355 330
8
VDD
7 4 5
D64
VO2
6 MA2S7280G
IN2-
5
SHUTDOWN R194
C207
27k
0.0018
R89 Q62
R193
1k 2SA1576
1k
R88
1k
+15V
+8V
+3R3V
+5V
C234 R234 C233
220p 100 1
IC230
R232
IC201 IC460 PC4570G2
100k
TC4W53F TC4W53F
1
1 8 1 8
2 7 2 7 2
3 6 3 6
3
4 5 4 5
4
-12V
+15V
+8V
+3R3V
+5V
L481 L482
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
-12V
C57 0.0022 +8V
R24 10k IFIN_A
R22
10k
2
IC490
1 -
3 TC4W53F
+
IC2 1 8
R23
PC4570G2
10k
-4.94V
2 7 DIFA
C58 0.0022
IC550
R28 10k 3 6 MON
TA79L05F
R26
10k
6 4 5 MONS
7 - I O
5
+
R490 COM
IC2
1k
R27
PC4570G2
10k
-9.63V
+3R3V
L250
IC251
TD62783AF
1 18
IC250
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
IC260 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
3.17V 4.78V 7.97V -11.7V 14.8V
-12V
+15V
+8V
+3R3V
+5V
R123 4.7k
R124 4.7k
D61
1SS355
REFV
8
+8V V+
IC104
PC4570G2
GND
R60 D60
4
22k 1SS355
Q61
IC104
DTC144TE 4.0mV
IDLV PC4570G2
Q60
UMH11N 5
+
R67 R71 7
4 3 4 6
47k
47k -
IDHV V+
IC60
GND Q63 Q64 2 5
NJM2058M
DTC114TU DTA144EE
11
R69 R245
1 6
6.8k
TMC3ADCS2X 470
IC104
PC4570G2
R851 R198
3
470
47k 1 +
IDLV 2
-
50MS
R84
R85 3.3M 220k
R248
5.3mA
6.8k
R86
Q474 R476
330 2 CP81
-
1 2SA1576 470k
3 POCV
IC61
+
NJM2058M
IC60 R77 R76 R75
13
NJM2058M 220k 33k 22k
- 14
Q476 12
+
DTC114TU
C61 1
C62 1
71
BUS LINE1
+15V
+15V
+8V
+8V
+3R3V
+3R3V
+5V
+5V
-12V
8
7
- +
+ - 6
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
R560 R561
100k 100k
R549
10k
+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)
4
frequency : 14.1 MHz
V+
IC61 mode : J3E(USB)
NJM2058M
GND ANT(RX) : no input
(TX) : no modulation
11
SCOPE ATT : 0dB
R243 Digital tester
range : input impedance
1k
MPLAY 200mV : 100M
2V : 11M
20V,200V,1000V : 10M
IC61
NJM2058M
R90
2
-
1M 1
3
+
R246
1k
SPLAY
C68 0.001
R97 6.8M
IC61
R96
NJM2058M
IC61
3.3M
NJM2058M 9
-
8
6 10
- 7 +
5
+
IDLV
ALC
BUS LINE4