Main Unit - Icom IC-7800 Service Manual Addendum

11-17 MAIN UNIT

MAIN UNIT (1)
D3 L56 F3
1 2
J9 DSM3MA4 EXCCL3225U
DC OUT
D4 F2 F1
(MAX 1A)
DSM3MA4 S-N5054 S-N5054
L80
C80
BLM31PG121SN1
100p
J1
SQLS L6 100µ
RTTY L1 100µ
13.8V L7 HF50ACC322513
6 7
ALC L2 100µ
SEND L3 HF50ACC322513
MAIN
1 8 3
ACC(1) MOD L4 100µ
AF L5 100µ
4 5
GND
2
J2
TRV L10 100µ
13.8V
6 7
8V L9 HF50ACC322513
MAIN SEND
1 3
ACC(2) BAND L8 100µ
ALC
4 5
L21 HF50ACC322513
2
J3
SQLS L16 100µ
RTTY L11 100µ
13.8V L17 HF50ACC322513
6 7
ALC L12 100µ
SUB SEND L13 HF50ACC322513
1 8 3
ACC(1) MOD L14 100µ
AF L15 100µ
4 5
GND
2
J4
TRV L20 100µ
13.8V
6 7
8V L19 HF50ACC322513
SUB SEND
1 3
ACC(2)
BAND L18 100µ
ALC
4 5
L22 HF50ACC322513
2
EALC
RL50
ALC ADJUST
OMR-109F
R52
J5 10
SEND
Q50
RELAY
DTC114TU
ALC IC50
PS7122AL
R53 390
Q51
DTC114TU
J6
L52 100µ
METM
METER OUT
MAIN(TX)/
L53 100µ
SUB
METS
RL140
Q141
NA-12W
DTC114EU
J140
L141
MAIN
EXC-ELDR25C
SP OUT
IC140
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
100µ
KEY
KEY +3R3V
+5V
+8V
+15V
-12V
IC495
SN74LVC1G08DCKR
3 4
GND Y
2
B
1 5
A VCC
J495
OUT
L495
GND L456 EXCCL3225U
47µ
VCC +5V
L454 BLM31PG121SN1
L455 BLM31PG121SN1
J496 L453 EXCCL3225U
L496
GND L452 EXCCL3225U
47µ
VCC L451 LW16
IN L450 EXCCL3225U
J901
SPDO
Explanatory notes
GND
to LOGIC
SPDI
unit J826
GND
+15V
+8V
+3R3V
R584
10k R211 10k
C210
DSPTHRML
1
D1 D2
SQLAM
1SS355 1SS355
Q1
DTC114TU
Q3 Q4
2SC4081 2SC4081
+3R3V
Q6
R11 Q5
2SD1619
150 DTA114EU
C220
+8V
1
Q2
-12V
DTC114TU
SQLAS +15V
11
GND
IC1
NJM2058M V+
4
R15
47k
R13 R37
100
2.2k
TRVI
Q7
C37
2SC4081
10
R18 R17 R16
+8V
470 100k 100k
2
R21 R20 R19
1 -
470 100k 100k 3 BNDM R42
+
IC1 100
NJM2058M
6
C39
7 -
5 BNDS 10
+
IC1
NJM2058M
EALC
EXRL1
EXRL2
AAFVA
AAFVB
+15V +15V
+5V +5V
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
C134
2SD1801
+15V
0.082
R149
IC105
220
C121
NJM2172V
10
1 14
OP+INA OP+INB
14.9V 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
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
OP+INA OP+INB
MUTEI 2
R184 1.8k OP-INA OP-INB
PHML2 3
OPOUTA OPOUTB
KEY 4
R183 1.8k EVROUTA EVROUTB
+3R3V PHML1 5
VCNTA
+5V PHSL1 6
VCNTB
+8V 7
R185 1.8k V+
+15V PHSL2
-12V
R186 1.8k R195 C185
1k 10
J450
GND J411
VDD5 CIVE
IC181
EP421
GND CIV CIV TC4W53F
+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
C216 2SC4081
1
R212
4.7k
IC821
NJM2172V
C213 C217
1
0.0022 82p
OP+INA
C215
2
1 OP-INA
3
OPOUTA
4
C203 R202 R203 EVROUTA
R216
5
1 4.7k 220k
33k VCNTA
R221
6
10k VCNTB
7
V+
R249
R472 10k
47k
R222
4.7k
C222
2.2
C226
R218 15k
1
R228 15k
R223
1k
-12V -12V
+15V +15V
+8V +8V
+3R3V +3R3V
+5V +5V
IC3
R35 C28
TC4W53F
15k 10
1
R34 C34
2
IC4
1k 1
NJM2172V
1 14 3
OP+INA OP+INB
2 13
OP-INA OP-INB R47
3 12 4
Q8 10k
OPOUTA OPOUTB
2SC4081 4 11
EVROUTA EVROUTB
2.82V 5 10
VCNTA REFIN
R40
6 9
IC5
15k VCNTB VREF
C29
7 8 TC4W53F
V+ GND 10
1
R39 C35
1k 1
2
+8V
3
Q9
2SC4081 4
2.81V
8 8
R32
V+ V+
IC2 IC102
10k
µPC4570G2 µPC4570G2
GND GND
4 4
R31
10k
-12V
MAMS MAMS
IC100
C129 R104 Q100 R157
TC4W53F
0.0033 10k 2.2k
2SJ144
1
R114 R101
2
10k 4.7k
3
R159
1k 2
1 - 4
3
+
IC102
MAIN side
µPC4570G2
SQL open : 3.03V
1.3mV close : 6.1mV
C130 R109 R158
Q101
0.0033 10k 2.2k
2SJ144
IC101
R116 R106
TC4W53F
10k 4.7k
1
R174
2
1k 6
-
7
5
+ 3
IC102
SUB side
µPC4570G2
4
SQL open : 3.03V
1.7mV close : 6.1mV
SAMS
EALC
-12V -12V
+15V +15V
+8V +8V
+3R3V +3R3V
+5V +5V
IC191
TC4W53F D62 R66
1 8 1SS355 100
14 2 7
13 CP82
12 3 6
11
R181
10 4 5
REFIN 10k
9
VREF
8
GND
C206
0.0018
R189
10k
IC192
R176
+8V TC4W53F
1.2k
1 8
2 7
IC182
TPA6111A2DGN 3 6
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
R204 100
R201 10k
IC201 IC460
TC4W53F TC4W53F
14 1 8 1 8
OP+INB
13
OP-INB
12 2 7 2 7
OPOUTB
11
EVROUTB
10 3 6 3 6
REFIN
9
VREF
8 4 5 4 5
GND
C249 R235
0.1 0
-12V
+15V
+8V
+3R3V
+5V
L480 L481
HF50ACC322513 HF50ACC322513
2.31V 2.30V
8
7
IC450 IC451
SI-3012KS SI-3012KS
6 1 8 1
VC GND VC GND
2 7 2
C480 22 VIN GND C483 22 VIN GND
5 3 6 3
VO GND VO GND
4 5 4
C481 22 ADJ GND C484 22 ADJ GND
8
R450 22k R451 22k
R25
-12V
1k
7 C57 330p
R24 68k IFIN_A
R22
6
10k
2
1 - IC490
5 3 TC4W53F
+
IC2 1 8
R23
µPC4570G2
10k
R29
2 7 DIFA
1k
C58 330p
R28 68k 3 6 MON
R26
10k
6 4 5 MONS
-
7
5
+ R490
IC2 1k
R27
µPC4570G2
10k
+3R3V
IC251
TD62783AF
8 +8V 1 18
IC250 IN1 O1
2 17
CD74HC4094M
IN2 O2
7 1 16 3 16
STROBE VCC IN3 O3
2 15 4 15
DATA OE IN4 O4
6 3 14 5 14
CP Q4 IN5 O5
4 13 6 13
Q0 Q5 IN6 O6
5 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
8 TD62783AF
1 18
IC260 IN1 O1
7 2 17
CD74HC4094M
IN2 O2
1 16 3 16
STROBE VCC IN3 O3
6 2 15 4 15
DATA OE IN4 O4
3 14 5 14
CP Q4 IN5 O5
5 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
-12V
+15V
+8V
+3R3V
+5V
R123 4.7k
R124 4.7k
R65 220k
D61
1SS355
R64
REFV
10k
13
14 -
12 +8V
+
IC60
R61 R60 D60
NJM2058M
68k 22k 1SS355
Q61
R72 330k DTC144TE
IDLV
Q60
UMH11N
R67
R71
6 4 3
47k
7 - 47k
5 IDHV V+
+
IC60 IC60
GND 2
Q63 Q64
NJM2058M NJM2058M
R69
11 DTC114TU DTA144EE
RH03ADCS2X
1
R74 220k
9
-
8
10 R851
R198
+
IC60 470
47k
NJM2058M IDLV
50MS
R84
R85 3.3M 220k
D63 R92
1SS355 330
5.3mA
D64 R86
Q474 R476
MA2S728 330 2 CP81
-
1 2SA1576 470k
3 POCV
+
R77 R76 R75
IC60
NJM2058M 220k 33k 22k
Q476
DTC114TU
C61 1
C62 1
11 - 9
BUS LINE1
+15V
+15V
+8V
+8V
+3R3V
+3R3V
+5V
+5V
-12V
C234 R234 C233
220p 100 1
IC230
R232 µPC4570G2
100k
1 8
2 - + 7
3 + - 6
4 5
-12V
+15V
+8V
+3R3V
+5V
L482
HF50ACC322513
2.31V
IC452
SI-3012KS
8 1 8
VC GND
7 2 7
C486 22 VIN GND
6 3 6
VO GND
5 4 5
C487 22 ADJ GND
R452 22k
-12V
+8V +8V
1.7mV
-4.94V R560 R561
100k 100k
IC550
TA79L05F R549
10k
I O
COM
-9.63V
+3R3V
L250 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
-11.7V 14.8V
BUS LINE2
-12V
+15V
+8V
+3R3V
+5V
BUS LINE3
MESUREMENT CONDITIONS
8 4 voltage at RX(no instrudion)
frequency : 14.1 MHz
V+ V+
IC104 IC61 mode : J3E(USB)
µPC4570G2
GND NJM2058M GND ANT(RX) : no input
(TX) : no modulation
4 11
SCOPE ATT : 0dB
4.0mV IC104
Digital tester
µPC4570G2 R243
range : input impedance
1k
5 MPLAY 200mV : 100MΩ
7 +
2V : 11MΩ
4 6
20V,200V,1000V : 10M Ω
-
5
IC61
R245
6 NJM2058M
6.8k
R90
2
1M - 1
3
IC104 +
R246
µPC4570G2
1k
3 SPLAY
1 +
2
-
C68 0.001
R248
6.8k R97 6.8M
IC61
R96
NJM2058M
IC61 IC61 3.3M
9
NJM2058M NJM2058M
- 8
13 6 10
- - +
14 7
12 5
+ +
IDLV
ALC
BUS LINE4