Hitachi VTMX900ECT Wartungshandbuch Seite 106

3-24
Audio Linear (AL)
1 2
AIN1
AINF_AIN2
4601
AMLR
A
for Stereo only
AMLP
AFV
14AL
I600
3624 3608
560R 120R
14VM1
B
I604
4602
not used
5610
10u
9412
14.4V
not used
11.5V
1V
0.5V
12.2V
7603
3631
C
I631
BC327-40
22R
0.9V
Erase
Oscillator
Switch
1.1V
7606
BC847BW
2.7V
GNDEO GNDEO
1V
I629
D
GNDEO
IREV
F614
3626
47K
10V
7608
0.5V
BC817-40 I636
3630
E
10R
GNDEO
0.1V
Erase
Oscillator
I615
F
.. OSCILLOGRAMS
CTL2
..V MEASURED IN PLAYBACK MODE
CTL1
..V MEASURED IN RECORD MODE
1 2
3 4
F608
F609
F607
F605
F601
3609
120R
3610
delete for Stereo
10K
2608
GND
10n
GNDEO GNDEO
7602
I641
BC856B
7.6V
3616
7604
BC846B
4K7
PB
Switch
3623
7607
GNDAL
BC846B
2K2
BIAS Adj.
GNDAL
3625
2615 I620
330p 100K
3620
61
not used
I635 I611
2616
1n
5600 GNDEO
8 6
GNDEO
4
F6501
3
2
F6503
F6504
GNDEO
F6505
7
1
F6506
GNDEO GNDEO
F6507
60
3 4
3-24
5 6 7
I601
3602 2601
47K
100n
64
GNDAL1
GNDVS
for 2Scart only
63
3606 2604
27K
I607 100n
GNDVS
delete for Stereo
3.7V
80 3.7V 79 3.8V 78
62
I638
3644
4603
VREFA
F603
95
for stereo only
100K AGND
delete for stereo
2610 3.7V REC/EE
I645 GNDVS
96 LINE
MUTE
AMP
2612
3614 10u
PB
MTA(from PIN10)
18K
1u
97
3.8V 3.7V
2611
98
100n
0.9V 7.6V
99
AUTO
BIAS
3.7V
PB/EE
100
PB
GNDAL
AMP
EQ
+
1 2 3
3.7V 3.7V
3.6V 3.6V
3632
1961
PH-B
12K
1
3627
F6102
2
8K2
GNDAL
5605
2621
10n
3636
390K
1965
FE-BT-VK-N
3.8V
1
2 R/PB
Head
3.8V
3
4 TD1
Audio
0.1V
5 Erase
Head
2.6V
6
GNDAL
Sync
7
Head
5 6 7
Interconnections:
AF page 3-27 AL page 3-24
FV page 3-21 FOME page 3-34 I/O page 3-33
8 9
I603
3601
14AL 14VM1
47K
GNDVS GNDVS
GNDVS
I602 2605
14AL 14VM1
100n
2606
65
GNDAL1
0V
100n
3.7V 77 1.1V 76 3.7V 75
7.6V 2V
AVCC
IN2
7004-A
IN1
LA71595M
IN3
AUDIO_LIN.
ALC
MTA-CROT
ALC
( AIO1)
10
DET
71
VREFA
REC
BIAS
AMP
REC:EP/LP
SP LP,EP
-
PB:EP
4 5 6 7 8 9
3.8V 3.8V 0.09V 1.8V 3.7V 3.7V 3.7V
3.7V 3.6V 1.2V 3.7V 3.8V
2627
3n9
I612
2631
2n2
I639
C601
NP0 2%
GNDEO
GNDAL GNDAIO
GNDAL
I640 I642
C603
C602
GNDAL GNDVS GNDAL1
8 9
AIO1 page 3-17 AIO2 page 3-15 DE page 3-19 FM ST page 3-22 FM NIC-page 3-23
PS page 3-14 VPO page 3-32 VS page 3-31
0010 E1 4601 A2
0200 F1 4602 B1
1961 D5 4603 B6
1965 E5 5600 E3
2601 A6 5605 E5
2602 A7 5610 B1
2603 A7 6601 B4
2604 A6 6602 C1
2605 A8 7004-A B9
A
2606 B8 7601 C1
2607 B4 7602 C3
2608 B3 7603 C2
2609 B2 7604 C4
2610 B6 7606 D2
2611 C6 7607 C4
2612 C6 7608 E2
2613 C4 9412 C1
2614 D6 9601 B7
2615 D3 C601 F9
2616 E3 C602 F9
2617 E8 C603 F9
B 2618 F3 F601 B5
2619 F8 F603 B6
2620 E1 F605 A5
2621 E7 F607 A5
2623 E6 F608 A5
2624 C1 F609 A5
2625 F4 F6102 E5
2626 D9 F614 E2
2627 E9 F6501 F5
2628 F7 F6503 F5
2630 E9 F6504 F5
2631 E9 F6505 F5
C
2632 F8 F6506 F5
2633 F9 F6507 F5
3601 A8 I600 B2
3602 A5 I601 A6
3603 A8 I602 A7
3604 A6 I603 A8
3605 A8 I604 B2
3606 A5 I605 B8
3607 A6 I606 C2
3608 B2 I607 A5
3609 B3 I608 C1
3610 B3 I609 C1
D
3611 B2 I610 D1
3612 C4 I611 E4
3613 B2 I612 E9
3614 C5 I613 E2
3615 C1 I614 E9
3616 C3 I615 F2
3617 C5 I616 E8
3619 C2 I617 E7
3620 D4 I618 E7
3621 C4 I620 D4
3622 C5 I622 F8
3623 C3 I629 D2
E
3624 B1 I630 F7
3625 D4 I631 C2
3626 E2 I632 C2
3627 D7 I633 D3
3629 E7 I635 E3
3630 E2 I636 E2
3631 C1 I637 B7
3632 D6 I638 B6
3633 F8 I639 E9
3634 D9 I640 F9
3635 E9 I641 C4
F
3636 E7 I642 F9
3637 F7 I645 B5
3638 E2
3639 D1
3640 E9
3641 E9
3642 F8
3644 B5
VS_S page 3-28