Philips FW-C250 Service Manual page 38

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