9-2
9-2
RIGHT
LEFT
Pb - DECK A
RIGHT
LEFT
Rec/Pb
DECK B
c
a
b
d
Pb INFO DECK B
Pb INFO DECK A
114
119
MOTOR ON A
110
-
+
A
B
110
HSD only
MUTE circuitry for sets with
electronic source selector only
Play Back
Record
8013
8011
8012
8010
8014
NS/HS Equalisation
HSD only
HSD only
M
RECORDER BOARD
ERASE HEAD
SIGNAL PATH
Rec
Pb
Rec
Pb
Rec
Pb
Rec
Pb
Rec
Pb
Rec
Pb
ALC delay
Rec/Pb - amplifier
LEFT
+
-
GND
ALC-TC
OP1
ALC1
RF
+
-
GND
ALC-TC
OP1
ALC1
RF
ALC
Rec/Pb - amplifier
RIGHT
+
-
REF1
REF2
OP2
ALC2
Vcc
ALC
+
-
REF1
REF2
OP2
ALC2
Vcc
Pb - amplifier
LEFT
Pb - amplifier
RIGHT
NS/HS Equalisation
Pb
15
14
13
1707
18
17
16
Rec
12
11
10
Rec/Pb - Switch
6
5
4
9
8
7
3
2
1
to 6703
MUTE Pb - Deck A
MUTE Pb - Deck B
ERASE
OSCILLATOR
to/from
A
udio Board
to/from
F
ront Board
to/from
A
udio Board
TAPE TRANSPORTS
SPEED
CONTROL
HS = High
REC = High
Pb A or B = High
MOTOR ON B
from 1707-A
G
H
I
14
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
A
B
C
D
E
F
G
H
I
A
B
C
D
E
F
3K9
2K
1
2
3
4
5
6
7
8
9
10
11
12
13
ECO MTF AS
6
7
13
+3
+3
14
AN7323
7712-B
1
2
3
4
AN7323
7712-A
5
10
12
11
9
8
1
2
3
4
6
7
13
5
10
12
11
9
8
14
AN7323
7711-B
47K
3770
AN7323
7711-A
3
4
5
6
7
8
3707
7KL
5701
1
2
680R
3782
10R
EH-S
GND MOTOR
1
2
+MOTOR
3781
680R
680R
3788
1721
3791
47K
18K
3792
NFBGND
NFBGND
NFBGND
100n
2720
NFBGND
22K
+3
BC547B
7722
shift
level
3790
+3
3758
3763
150K
10R
3703
0072
1
2
3
4
3704
1707-B
RSD
4
5
6
DIPMATE
13 14 15
1707-F
RSD
16
17
18
10
11 12
1707-E
RSD
RSD
1707-C
7
8
9
1707-D
RSD
RSD
1707-A
1
2
3
3
2
3
1
1
1
4
2
2
220R
9730
3722
220R
3750
220R
3738
3743
220R
M
M
2703
47u
M
3761
470K
3705
1K
+3
1u
2755
2756
47u
3776
1N4148
6709
3777
47K
100K
3774
47K
3775
2K7
3773
8K2
T31
T26
T28
T27
T25
T23
T29
T24
4
5
6
7
8
T30
HS DUBBING
2
REC INFO
3
PB INFO
DIPMATE
0071
1
2
3
EH-S
1719
1
T11
T12
T10
100K
3702
2K7
3786
47K
M
3760
220R
3787
M
M
T3
2705
4u7
10n
2721
2722
4n7
3708
22K
4n7
18n
2724
2723
+3
47u
2754
2753
1u
T19
T5
T20
T14
T13
T15
GND
LIN
5
6
RIN
+3
1709
EH-B
1
LOUT
2
ROUT
+TAPE
3
4
1N4148
6707
1N4148
6708
6706
100K
3772
1N4148
3769
3771
10K
4R7
3759
8K2
3785
270R
3778
100K
3709
270R
1K
3701
1K
3766
3768
10K
10K
3779
2K2
3756
3757
2K2
3754
2K2
3767
2K2
3755
3765
1K
10K
3764
10K
1n8
2730
1n8
3727
330R
2737
330R
3717
15K
3730
3720
15K
15K
3729
6n8
2735
3719
15K
6n8
2728
2K2
3712
22K
1n5
2726
22K
3728
2K2
3711
3718
1n5
2725
8K2
3716
T17
2727
1n5
T4
3732
3735
10K
10K
3736
2K2
2K2
3733
2707
1u
1n5
2740
22u
2716
2741
1n5
2715
22u
7717
BC547B
7701
BC557B
7702
BC547B
7719
BC547B
BC337-25
7704
BC547B
7718
7716
BC337-25
BC337-25
7715
7713
BC337-25
7714
BC337-25
7710
BC547B
T2
BC547B
7709
T16
T1
T18
3714
22K
3713
22K
2760
470p
3789
680R
2759
2704
22u
470p
T21
1N4148
6703
8K2
3725
3706
4M7
1n5
2752
68p
2761
+3
2762
68p
T8
T6
47u
2718
T7
2719
47u
22n
2731
22n
2738
2732
22n
2748
22n
2745
1n
6n8
2751
+3
6n8
2747
3747
12K
12K
3734
2739
100p
1K
3726
2742
100p
1K
3715
3745
10K
3740
10K
330K
3749
330K
3721
3737
3731
330K
330K
3742
330K
3780
330K
1K
470R
3748
3753
220u
2713
2714
47u
220u
2709
39R
2710
47u
39R
3752
3741
39R
3724
100u
2712
3746
39R
2706
100u
2711
100u
100u
2708
2749
1n5
1n5
2733
D
1n
2743
D
ECO MTF DD AS, 990520
0071 E14
0072 F14
1707-A F9
1707-B E5
1707-C G6
1707-D G2
1707-E E2
1707-F E7
1709 A14
1710 B14
1719 D14
1721 G14
1780 D14
2701 G8
2702 G8
2703 G13
2704 I4
2705 I10
2706 G3
2707 E8
2708 E3
2709 A5
2710 C4
2711 C3
2712 I3
2713 E4
2714 H4
2715 B6
2716 D6
2718 H5
2719 F5
2720 F9
2721 I10
2722 H10
2723 G10
2724 G8
2725 E6
2726 H7
2727 G5
2728 F7
2730 F6
2731 F5
2732 F5
2733 F3
2735 H7
2737 H6
2738 H5
2739 D5
2740 D6
2741 B6
2742 B5
2743 D3
2744 C4
2745 B3
2747 C5
2748 H5
2749 H3
2751 E4
2752 H5
2753 C8
2754 C9
2755 C10
2756 C11
2759 D2
2760 D2
2761 G4
2762 I4
3701 G8
3702 G12
3703 F12
3704 F13
3705 G13
3706 I4
3707 I11
3708 H10
3709 G10
3711 E7
3712 H7
3713 D2
3714 D2
3715 G4
3716 F5
3717 F6
3718 F7
3719 F6
3720 F6
3721 F4
3722 F3
3724 G3
3725 G5
3726 G4
3727 H6
3728 I7
3729 H6
3730 H6
3731 F4
3732 D6
3733 C6
3734 D5
3735 C6
3736 B6
3737 E4
3738 D3
3740 E4
3741 E3
3742 B4
3743 B3
3745 C4
3746 C3
3747 B5
3748 A5
3749 I4
3750 H3
3752 I3
3753 E5
3754 C7
3755 B7
3756 C7
3757 D7
3758 F13
3759 F10
3760 F11
3761 G12
3763 H12
3764 B8
3765 C8
3766 D8
3767 E8
3768 B8
3769 C9
3770 B10
3771 E12
3772 F12
3773 C10
3774 C10
3775 D11
3776 D12
3777 C12
3778 G11
3779 F11
3780 B4
3781 F6
3782 H6
3785 G10
3786 H11
3787 H10
3788 E2
3789 E2
3790 D9
3791 D9
3792 E9
5701 G9
6703 I5
6706 F12
6707 E12
6708 D12
6709 D11
7701 F12
7702 G12
7704 H11
7709 D6
7710 C6
7711-A B4
7711-B D4
7712-A F4
7712-B H4
7713 B8
7714 C8
7715 C8
7716 E8
7717 B9
7718 C10
7719 C12
7722 D9
9730 G9
8003
8001
8002
HSD
non HSD
10R
EH-S
1718
for High Speed Dubbing (
HSD)
only
1710
FFC
5
6
1
2
3
4
+3
GND
LIN
RIN
LOUT
ROUT
Flat Foil Connector optional
+TAPE
SHIELD
Pb head
WHITE left
RED right
SHIELD
Rec/Pb head
YELLOW
WHITE left
RED right
2
3
EH-S
1711
1
470p
2701
1n
2702
RIF switch optional
1n
2744
.4
.3
.3
.3
indicates that component is used
on print stage .3 only
.4
indicates that component is used
from print stage .4 onwards
... V Rec mode
... V
EVM
Speed
V
DC voltages measured
with nominal supply voltage
... V Play mode
.../... V Play deck B / deck A
Normal
High Speed Dubbing
5.5V
0.5V
1V
5V
5V
12V typ.
12V typ.
TB = 10
µ
s
1.5V
10V
TB = 10
µ
s
1,5V
0V
TB = 10
µ
s
0V
2V
0V
3.9V
5V
9.5V
9.6V
7.7V
10.1V
10.1V
10.1V
9.5V
4V
2.3V
2.8V
12V
12V
10.1V
10.9V
(8.6V-15V)
7.7V
5V
10.1V
0/0.7V
0/0.7V
4.5/0V
0/2.5V
0.7/0V
0.7/0V
0.7/0V
0.7/0V
0/0.7V
2.3V
2.3V
2.9V
0/0.7V
0/0V
0/0V
0/0V
0/0V
5.2V
2.3V
4.5V
4.5V
4.5V
8.2V
2V
1.3V
0V
9V
4.5V
4.5V
8.2V
2V
1.3V
0V
1.3V
0V
70
±
5 kHz
40Vpp typ.
0V
0V
0V
9V
4.5V
1.3V
0V
9V
9V
5.2V
2.3V
4.5V
4.5V
6.5V
5V
3.9V
5
4
3
2
1
Summary of Contents for FW-C250
Page 45: ...10A 3 Service Position ...
Page 46: ...10A 4 Wiring ...
Page 70: ...D O N O T P R I N T B L A N K P A G E ...
Page 71: ...3139 119 32340 dd wk039 12 1 12 1 EXPLODED VIEW MAIN UNIT ...
