Icom IC-7851 Servise Manual page 155

MAIN UNIT (MAIN-2)
MAIN-1
+15V
+8V
+5V
+3R3V
-8V
PHONS
PHONS
MAFS
MAFS
BSPONS
BSPONS
ASPONS
ASPONS
SPMIXS
SPMIXS
PMIXS
PMIXS
SPK
SPK
DSCLA
DSCLA
DSDAA
DSDAA
MICAFE
MICAF
LPHO
PHE
RPHO
PHONS
DSDAA
DSCLA
3.3
When head phones
Q501 connector are connected.
LDTC114EE
R464
R463
R506
R461
330
RL501
11
FTR-B4CA009Z 12
13
14
R507
15
330
3.3
RL411
Q411
LDTC114EE
C411
0.01
J412
EP411
MMZ1608Y102BT
[EXT-SP (B)]
EP413
MPZ2012S331A
J411
[EXT-SP (A)]
EP412
MPZ2012S331A
3.3
J413
When the audio is output from [EXP-SP] or [INT-SP].
SPE
[INT SP OUT] 2 R414
SPO
TO SW-A J105 1
0
MAIN-3
MAIN-1
AAFOUT_A
AAFOUT_B
USB_AF_L
USB_AF_R
R499
1K
2.2K
2.2K
1K
R494
1K
C496 1
HPRIGHT RIGHTINM
5 C493 1
VDD RIGHTINP
IC461
4
GND TPA6130A2RTJ GND
3 C486 1
HPLEFT LEFTINP R489
2
C483 1
LEFTINM
1
1K
R484
C465
1
1K
C464
C463
1
1
3.3
When the audio is output from [EXP-SP].
Q431
2SD1801
R436
R434
330
56
RL431 FTR-B4CA009Z
C432
1000 KA
R435
Q432 330
LDTC114EE
D431
L1SS400
C436
C437
0.01 0.01
Q421
2SD1801
R426
R424
330
56
FTR-B4CA009Z
RL421
C422
1000 KA
R425
Q422
330
LDTC114EE
D421
L1SS400
C426
C427
0.01
0.01
C495 0.0018
R498 10K
2
1
IC472 3 R495 10K
NJM4580M
C492 0.0018
R493 10K
R526 10K
6
R491 10K C525 0.0018
7
R527 10K
5
R524 10K
IC472
NJM4580M
2
1
R525
3
IC521
C485 0.0018
NJM4580M
0
R488 10K
2
1
C526 0.0018 R531 10K
3
R485 10K
IC471
NJM4580M R532 10K
6
C482 0.0018
7
R530
R483 10K 5
IC521
NJM4580M
0
6 R481 10K
7
5
IC471
NJM4580M
14.4
C445 0.0018
R445
R444
10K 56K
1 CE-LH
IC441 2
5 C425 R443
1 1
4 3
2.2K NJM4580M
2
3
IC431
LA4425A
14.4
C446
0.0018
R447
R449
10K
56K
C435
6
IC441
5 1 CE-LH
R448 R450
1 7
4 5
56K
2.2K NJM4580M
2
3
IC421
LA4425A
R664 R704
12K
3.9K
C664 C705
390P
560P
R665 R705
IC661 2 2
IC701
R663
C663
1 1 1.8K
3.3K R706
3 3
R666
10 CE-LH 470 NJM4580M
NJM4580M 0
0
R668 R710
12K
C708 3.9K
C666
390P 560P
IC661
R669 R711
IC701
6 6
1.8K
R667
C665
7 7
3.3K
R712
5 5
10 CE-LH 470 R670
NJM4580M
0
NJM4580M 0
R644
C645 1.8K
220P
R645
IC641
2
R643
1 3.3K
R646
3
1K
NJM4580M
0
R650
C648 1.8K
220P
IC641 R651
6
R649
7 3.3K
5
R652
1K
NJM4580M 0
R607
C607 22K
560P
IC601 R608 R609
6
7
6.8K 8.2K
5
NJM4580M
R587
C587 22K
560P
R588 R589
6
7
6.8K 8.2K
5
IC581
NJM4580M
R603
C605 8.2K
0.0015
R604
IC601 2
1
3.9K
3
NJM4580M
R583
8.2K
C585
0.0015
R584
IC581
2
1
3.9K
3
NJM4580M
*: Refer to the PARTS LIST for the value and name of component.
9-12
R707 R708
DAOUT_ACC
3.9K 820
DBOUT_ACC
MAIN-5
R713 R714
3.9K
820
MAIN-6
R647 R648
DAOUT_USB
1.5K 820
DBOUT_USB
R653 R654
1.5K 820
MAIN-5
R606
DBOUT_AF
8.2K
DAOUT_AF
R586
8.2K