Icom IC-756PROIII Service Manual page 110

A
PLL UNIT
5V
B
8V
C
D
E
MEASUREMENT CONDITIONS
VOLTMETER :10MΩ
OSCILLOSCOPE :20MHz 1MΩ 25pF
SUPPLY VOLTAGE :13.8V
DISPLAY :14.1MHz USB
R401 2k
R402 2k
R404 2k
R406 2k
1
VSS
2
SYSCLKO
3
R408 2k VDD
4
VDD
5
VSS
6
DA0
7
R410 2k DA1
8
DA2
9
DA3
10
VSS
11
R412 2k DA4
12
DA5
13
DA6
14
DA7
15
R414 2k VSS
16
VSS
17
DA8
18
DA9
19
R416 2k DA10
20
DA11
21
VDD
22
TE1
23
R418 2k TE2
24
TE3
25
VDD
R420 2k
R422 2k
R424 2k
IC402
TC7S04F
FI401
1
CFEC10.8MD11
C416 C417
0.1 0.1 W422
2
3
C452
33p
C420
0.1
C455
150p
L452
LB-343
R432
47k
R441
Q402
100
2SC4081
C419 R431
0.0047 100
F
R492 L491 L492
180 0.68µH 0.82µH
C492 C494
100p 39p
R439
47k
Q403
2SC4081
C424 0.0047
C423 0.0047
75
ETCO0
74
ETCO1
73
ETCO2
72
VSS
71
ETCO3
70
ETCO4
69
VSS
68
ETCO5
67
ETCO6
66
ETCO7
65
VSS
64
VDD
63
IC401
Q4MA
SC-1246A
62
Q16MA
61
VSS
60
FCK
59
RC
58
REF_OSC
57
VDD
56
PDTRI
55
VSS
54
PD0
53
VDD
52
PD1
51
PD2
R442
1k
R447
1k
R427 1M
R430
10
5
R604
33
4
EP451
MMZ1608Y102B
C418
0.1
IC682
TA78L05F
8V 1LOB
I 0
G
R455
180
Q451
2SK210
D452
C461 5p
HSM88AS
C456 R456 C463 R459
150p 47k 0.0047 15
D453 Q452
HSM88AS 2SC4081
R461 R660
82 15
10 - 13
5V
8V
32MHz_REF
C450
0.1
6 5 4
Q426
UMD3N
1 2 3
VB1S
L426
10µH
6 5 4
Q423
UMD3N
1 2 3
VB2S
L423
10µH
6 5 4
Q422
UMD3N
1 2 3
VB3S
ULDB
L422
10µH
6 5 4
Q421
UMD3N
1 2 3
VB4S
L421
10µH
5V
8V
L601
Q424 L424
10µH
UMD3N 10µH
1 6 PBFS
2 5
3 4
8V
L425
10µH
PBMT
R609 560
5V PLLB
L481 W481
Q481
10µH
R481 2SC4081 R688
1k 82k
Q681
2SA1576
J681
L682
HF50ACC322513-B
R694 W692
1.8k
C680
IC681
1
LMX2306TM
1 16
FLO
VP
2 15
CPO
VCC2
3 14
R680 10k ULPB
GND FO/LD
4 13 R687 1k PST4
GND
LE
5 12 R685 1k PDAT
FIN
DATA
6 11
R686 1k PCK
C695 FIN CLOCK
7 10
0.01 VCC1
CE
8 9
OSCIN
GND
W455 C681
0.0047
L505
R502 1812CS. C503
560 122XKBC 0.0047
D502 KV1770S
C502 Q501
20p 2SK508
L506
1812CS.
122XKBC
R503
560
C501
0.0047 D501 KV1770S
L525
R522 1812CS. C523
33 122XKBC 0.0047
D522 KV1770S
C522 Q521
56P 2SK508
L526
1812CS.
122XKBC
R523
470
D521 KV1770S
L555
R552 1812CS. C553
270 122XKBC 0.01
C552 Q551
150p 2SK508
L556
1812CS.
122XKBC
R553
560
L575
R572 1812CS. C573
560 122XKBC 0.0047
C572 Q571
100p 2SK508
L576
1812CS.
122XKBC
R573
560
PBFS
5V
8V
R601 R575 C624 0.0047
1.8k 47
L627 L628
56n 56n
Q601
C626 0.1
2SC4403
IC620
C602 C620 R621 µPC1678G R623
39p 10
39p 10
1 8
IN VCC
2 7
GND GND
3 6
GND GND
4 5 Q651
GND OUT
DTA114EE
C611
0.0047
R651
2.7k
L651 L652 L653
L603
47nH 56nH 82nH 82nH
C605 C652 C654
7p 3p 2p
C607 D601 C655 D651
12p MA77 10p MA77
A
5V
B
8V
C
D
C506
EP504
1p
E
C507
0.0047
Q502
2SC4213
C526 EP524
1p
F
C527
0.0047
Q522
2SC4213
C556 EP554
1p
G
C557
0.0047
Explanatory notes
Q552
VOLTAGE LINE
2SC4213
C576 EP574
1p
H
C577
0.0047
Q572
2SC4213
5V
8V
EP621
MMZ1608Y102B
5V 1LOB
C650
0.0047
R661
4.7k
L655
4.7µH
R663
4.7k
C658 C660 D661 C661 R653
56P 56P 1SV307 0.0047 15
I
R652
D662
1SV307 270
Q661
R662
DTC114EE
100
J