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Hitachi VTMX900ECT Wartungshandbuch Seite 105

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FM Stereo Nicam (FM-ST-NIC)
1
2
5VA
5VD
9VASW
A
5VA
5VD
9VASW
I760
3765
12
B
SCL
100R
I761
3767
13
SDA
100R
I762
2771
1.5V
3
GNDFMS
47p
8
2792
I763
2
ANA_IN1+
1.5V
SIF2
C
47p
MONO
7
I764
2774
3.8V
43
MONO-IN
AFV
D
41
SC1-IN-R
GNDFMS
3.8V
SCART 1
I766
40
SC1-IN-L
3V
38
SC2-IN-R
37
SC2-IN-L
SCART 2
E
F
GNDFMS
1
2
REC
07
0V
A: DC, 1 V/Div, 500us/Div
A: DC, 500mV/Div, 2us/Div
IC 7705 PIN8 AFV MONO
IC 7705 PIN12 SIF2
Interconnections:
AF page 3-27
AL page 3-24
AIO1 page 3-17 AIO2 page 3-15 DE page 3-19
FV page 3-21
FOME page 3-34 I/O page 3-33
PS page 3-14
3
4
5
GNDFMS
2761
GNDFMS
100n
GNDFMS
2764
GNDFMS
2766
GNDFMS
I790
5.2V
7
8
9
4
10
TP
TP
TP
TP
7761
MSP3415D
I2SL/R
I2SL/R
S1...4
FM1
LOUDSPEAKER R
FM2
DEMODULATOR
NICAM A
LOUDSPEAKER L
NICAM B
IDENT
IDENT
DSP
HEADPHONE R
A/D
SCART-L
HEADPHONE L
SCART-R
A/D
SCART-R
SCART-L
SCART
Switching Facilities
NC NC NC NC
25
29
35
39
44
17
21
28
20
5.1V
1
5
2.4V
1761
I774
I775
F761
5762
GNDFMS
HC-49/U
10u
18M432
GNDFMS
GNDFMS
GNDFMS
GNDFMS
5VA
3
4
5
REC
08
REC
0V
A: DC, 2 V/Div, 500us/Div
IC 7761 PIN30,31 AFL,AFR
FM ST page 3-22 FM NIC-page 3-23
VPO page 3-32
VS page 3-31
VS_S page 3-28
3-23
3-23
6
7
8
5VD
6760
3760
9VASW
1N4148
10n
10u
2.6V
8V
I789
42
33
32
34
11
5.16V
I786
19
5.1V
I785
22
5.1V
DACM-R
26
D/A
GNDFMS
GNDFMS
LOUDSPEAKER
DACM-L
27
D/A
I784
18
TP
I783
36
3.7V
I782
23
24
GNDFMS
SC1-OUT-R
30
4767
3.8V
D/A
SCART 1
SC1-OUT-L
31
3.8V
4768
D/A
TP
TP
TP
GNDFMS
6
6.2V
14
15
16
I776
GNDFMS
6
7
8
11
0V
9
1761 E6
2761 A6
2764 A6
2765 D8
2766 A6
2767 B8
2768 B8
2769 B7
2771 C2
A
2774 D2
2776 D7
2777 D2
2787 F5
2788 F6
2790 F5
2791 F5
2792 C2
2793 E7
2794 E8
3760 A6
3763 A7
B
3764 A8
3765 B2
3767 B2
4759 A5
4762 F3
4763 F3
4764 F3
4765 F4
4767 D8
4768 E8
5760 A8
5761 F5
C
5762 E5
6760 A6
6761 A7
7761 B3
9724 A8
F760 E3
F761 E5
I760 B2
I761 B2
I762 B2
I763 C2
D
I764 C2
I766 D2
I768 E3
11
I772 E4
I774 E5
AFR
I775 E6
I776 E6
AFL
I782 D7
I783 D7
I784 C7
I785 B7
I786 B7
E
I787 A6
I788 A6
I789 B7
I790 B5
F
..
OSCILLOGRAMS
attention for pos 7761 solder direction!
..V MEASURED IN PLAYBACK MODE
..V MEASURED IN RECORD MODE
9

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