Icom IC-756PROIII Service Manual page 111

A
B
C
ULPA
ULPB
D
D2
DAP222
D3
CON2A DAN222
ULDA
VB4S CON2B ULDB
E
DULS
CON2
DIVOUT
PDATA MKRS
PCKA 32MHz_REF
PDAT
PCK
PDAT
VB3S PCK
F
W170
W151
W201
W202
W382
W381
W221
W222
W251
VB2S
G
W252
W683 C913 220p
W451
W452
W521
W522
W551
R913
100k
W552
W571
H
Q902
W572
2SK508
OFF 0V
ON 2.7V
W681
W682
L908 L907
0.12µH 0.1µH
C931 C929
12p 4p
Explanatory notes
VOLTAGE LINE
I
31.2nS
1.18Vp-p
J
5V
8V
L701
UNLC
10µH
5V
6 5 4 DRES
Q2
C192
UMD3N
D4
0.1
DAN222
IC192
TC7S08F
5
1
4 MKR
2
1 2 3
W33 R192
3
2.2k
D902 PST5
1SS226
PDAT
PCK
5V
L901
IC901
330µH
R911
LC7153M
1k
13 12
OUTA AOA
14 11
PIA AIA R909 1.5k
15 10
VSS PDA1
16 9
PIB PDA2 R907 56k C910
17 8
1
VDD TEST
18 7
CB CA
19 6
OUTB LDA C903
20 5
100p
AOB LDB
R902 1k
21 4 PCK
AIA DI
22 3
PDB1 CL
R903 1k
23 2 PST6
PDB2 CE
24 1
XOUT XIN
IC902
TC7W08F
C907 8
1
270p
7
MKR
2
5V
5V
6
3
5 PDAT
4
R901
1k
DRES
C911 R904
0.1
10k
L903 OFF 0V
R912
1k 100µH ON 7.6V
OFF 0V L906
100µH
ON 5.6V
C920 C923
OFF 0V
0.0047 0.0047
ON 7.0V
OFF 0V
Q903
ON 2.9V
2SC4117
C919
PST7
OFF 4.6V
2p
ON 0V PDAT
OFF 0V
ON 5.2V PCK
Q907
DTC114EE
R916 L905
150 0.68µH
R920
47
8V
OFF 0V
C927 L910 R922 L909
ON 6.6V
0.001 0.33µH 100 100µH
Q906
DTB123EK
Q904
R921 C925
2SC2714 64MHz_REF
47 0.0047
8V
OFF 0V Scope OFF 0V
ON 0.2V ON 4.6V
OFF 0V
ON 0.66V
S2LO
8V
R52 15k
X52
L51 CR-338.
R36 R51 1812CS.
Q51
47k 47k 122XKBC
2SC4403
8V
R55
D51 KV1770S
47
C88
0.0047
1.7V
C64 R58
4.0V
6.3V
0.0047 27k
R71
2.9V 47k
L52
0.6V 2.3V C81 Q81
LS-472C
0.0047
2SC4405
Q52
2SC4081
Q71
2SC4081
2.3V
R701 2k
R703 2k
R730
1k
R705 2k
4.8Vp-p
10µS R707 2k
34 22
VSS DA8
35 21
UL DA7
36 20
P1 DA6 R709 2k
37 19
TREE DA5
38 18
P2 VSS
39 IC701 17
VDD DA4 R711 2k
SC-1287
40 16
VSS DA3
41 15
R729 1k
STRB DA2
42 14
R727 1k
DATA DA1 R713 2k
43 13
R728 1k
CON_CLK DA0
44 12
VDD VSS
R715 2k
R717 2k
R719 2k
1.8V
C708
0.0047 L702 330µH L703 390µH C714 270p C716 270p
R721 W1
47k
C710 82p C712 33p
0.6V
Q701
2SC4081
L801
10µH
R801 2k
R803 2k
R830
1k
R805 2k
R807 2k
34 22
VSS DA8
35 21
UL DA7
36 20
P1 DA6 R809 2k
37 19
TREE DA5
38 18
P2 VSS
39 17
IC801
VDD DA4 R811 2k
SC-1287
40 16
VSS DA3
R829 1k 41 15
STRB DA2
42 14
R827 1k
DATA DA1 R813 2k
43 13
R828 1k
CON_CLK DA0
44 12
VDD VSS
R815 2k
OFF 7.6V
ON 0V
R817 2k
Q905
DTC114EE
R819 2k
L802 10µH L803 12µH C816 18p R823 1.8k
2.5V
C808 R821 W6 C814
Q802
0.0047 39k 18p
C810 6p C812 2p
2SC4117
0.6V 2.1V
Q801
2SC4081
R825
220
8V
S2LO
8V
W10
L55
DRES
10µH
PCK
R54 470
PDAT
CON2
C58
C54
C53
120p
0.0047
82p
UNLC
L31
L82 EXCCL3225U
C86
LS-509 16
22p
R47
PST1 4 1
Q1 STR
1k
PST2 5 2
Q2 D
PST3 6 3
Q3 CLK
PST4 7 15
Q4 OE
PST5 14
L81 R48
C83 Q5
LS-509 PST6 13 1k
22p
Q6
PST7 12
Q7
11
Q8
9
QS
10
IC1
1.0V QS
BU4094BCF
8
PLL UNIT
R702 1k
R704 1k
R706 1k
R708 1k
R710 1k
R712 1k
R714 1k
R716 1k
R718 1k
R720 2k
P701
J701
3LO to MAIN-A
unit J211
W25 W28 W29 W2
P851
J851
MKR
to RF-B
5V unit J951
R802 1k
R804 1k
R806 1k
R808 1k
R810 1k
R812 1k
R814 1k
R816 1k
R818 1k
R820 2k
4.0V
P801
J801
to RF-B
unit J2001
S3LO
L806
0.56µH
P901
J901
to RF-B
C818
S2LO unit J2101
0.0047
1.5V
J1
L1 HF50ACC322513-B
8V
5V NC
5V
L2 HF50ACC322513-B
5V
R9 1k PSTB
R2 1k DRES
R3 47 CON0
R4 47 CON1
to MAIN-A
CON2
R5 1k
unit J841
R8 1k PSEL
R1 100 UNLC
14V
14V
NC
GND
GND
P81
W51 J81
2LO to RF-B unit
J1801
10 - 14