Icom IC-T70A Service Manual page 39

MAIN UNIT (4/4)
TTEMP
5VS
VCC- I
C519
T5 0.001
R512
10
4.88V
R520
C517 C522 C1000
8.2k
0.1 0.001 0.01
0.001 R502 C509 JDP2S04E JDP2S04E C523
C500 0.001 3.3k
0 D500 D501 0.001
R519
R517
1k
R515
R510 1k
1k
TX:0.78V
R518
VHFC
1.5k
R516
TXMUTE 10k C520
C527
0.1 0.01
UHFC
T5
V TX:1.77V
C512
U TX:2.24V
0.001
R514
MMZ1005Y102CT
V TX:0.44V
1M
U TX:0.56V
V TX:0.74V
5
U TX:0.94V 3
4
R505
BPF1/ISET1 1
IC500
22k 2 TA75S01F
V TX:0.44V
U TX:0.56V
BPF2 /ISET2
R524
22k
C526
0.01
BPF3 /PSET
TXMUTE
VR5
4.21V
C529
Q500 3.13V
BB506C
0.5P
3.16V
C507
VHF C530
1ST IF MIX 10P
1.60V
8P
C506
0.001
2.68V
( 145MHz)
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EP503
7.20V
MPZ1608S101A
MMZ2012Y102B C566
C576
EP501 1
0.001
C539 C542 C547 C551
0.001 0.1 0.1 0.1
L507 V TX:1.94V
22N U TX:1.95V
V TX:1.78V
L502
C561 L510 L512
LQW18AN68NG00D U TX:2.23V
0.001 15N 12N
RFM01U7P
L505
C543 Q 503
C559
33P
0.001
C540 18N
0.001 C548
Q502
R532
12P R824 C957
2SC5998 47
33P
0
C574
390 18P
R528
R533
47k
C549 C552 3.3k R543
R522
0.001 0.1
100
R537 100
C560
0.001
C577
UHFC
0.001
VHFC
MMZ1005Y102C T
EP502
R822
0
R823
V TX:2.37V
0
C568 C572
1M U TX:2.39V
R527
0.01 R534 0.001 0.001 R548
C536
560k 10k
V TX:0.59V
U TX:0.60V
C555
I C501 0.01
V TX:0.59V 1 8
Q504
U TX:0.60V 2 7 LDTA144EE
R540
3 6
4 5
10k
R538
LM2904PWR
C961 C960
R529 15k
1 1
33k C553 0.1
C557
0.01
BPF3
C558
0.01
R539
15k
RX140 (136-174)
R535
47
4.87V
4.00V
R542
C541 C554
1P 8P 47
4.41V
Q505
BB506C
1.31 V
C538
8P
LQW18AN82NG00D
2.37V
2.74V (145MHz)
(145MHz)
V TX:2.02V
U TX:3.50V
RX:0V
150 Q510
R564
R568
C623
NTCG10
470 P
R570
C579
47
0.001 L514
20.0N
D506
C586 C588
*C584
8P 100P
1SV307
*C585
L517
16.0N V TX:2.03V
Q507
U TX:3.82V
L516
RFM12U7X L518 RX:0V
2.5N
0.22U
MP500
3253 V TX:0V
C589 U TX:4.7V
R556
0.001 C595
RX:0V
0 0.001
R555
C592
1k
0.001
R550
15k
EP504
MMZ1005Y102CT
Q508
1 5
2
34
XP1115
C657
0.001
C606
L522 0.001
0.82U
1SV308
L515
C596
V TX:1.68V
10.3N
100P
U TX:0V
RX:0V
1SV308
LQW18ANR15G00D LQW18AN56NG00
C593 L519 C613
220P 0.001
D509
C609
1SV308
15P
3.12V
4.25V
4.85V 3.04V
Q509
C607
BB506C
2.70 V 1.53V
15P
C597
R551
0.001
0
UHF
1ST IF MIX
2.29V
(435MHz)
V TX:3.97V V TX:2.02V
U TX:0V U TX:3.82V
RX:0V RX:0V
LDTC114EE
R561
C605
C610
150 C604
D525 0.001
0.001
47P
1SV271
*C670
L523 L625 C699
20N
C599 16.1N 8P
0.3P C702
0.3P
C624
0.3P
C612
*C608
10P
C635
0.001
R573
47k
L535
18N
C647 C659
4P 7P
R574
R569 R572 82k
47k
10k
C614 C627
0.001 0.001
C959
C620
0.5P
0.5P
D510 L531 L532 L534
C616
61N
0.1 72.0N 45.5N
C644 C650
D 511
2P 1P
C642 C649
C652
18P 30P 22P
L524
V TX:0.85V
U TX:0V
C615 RX:0V
15P
4.86V
R575 R578
L530
UR5
47 33N 0
R577
4.7k
4.37V
1P
C617 C621 1P 1P C641
1P C629 C633 68P
Q511
1.01V
BB506C
C630
C622
1P
1P
2.23V 2.54V
( 435MHz) (435MHz)
RX440 400-479 MHz
*: Refer to the PARTS LIST for the value and name of component.
10 - 4
J500
1
C654
C651
4P
7P
C701 C653
39P 100P
L624 L533 R588
82k
18.3N 15.1N
MP501
OG-503040
V TX:0.81V
U TX:0.84V
C958
RX:0V
0.001
R582
150
D524
1SV308
4.84V
2.45 V
L536 C662 C667 C671
47N 100P 100P 100P