Philips FW-C250 Service Manual page 39

RECORDER BOARD / componentside view
+ Motor
Motor-
switch A
Mot. GND
Motor +
B
A
+3
PB Info A
E
B
C SPEED
ECO MTF DD stage .4, 240699
RECORDER BOARD / copperside view
C SPEED
B
E
PB Info A
+3
A
B
Motor +
Mot. GND
Motor-
switch A
+ Motor
ECO MTF DD stage .4, 240699
9-3
These assembly drawings show a summary
of all possible versions.
For components used in a specific version
see schematic diagram respectively partslist.
5
1 2 3 4
0071 E1 2744 C2 3735 B3 3789 B7
0072 E3 2745 A1 3736 A4 3790 D3
General
1702 A5 2747 B2 3737 B2 3791 D3
1707 B8 2748 D7 3738 B2 3792 D3
1709 A7 2749 B7 3740 B2 3793 E4
1710 A7 2751 A3 3741 A2 5701 E7
1711 E8 2752 C8 3742 B1 6703 D6
1719 A3 2753 D4 3743 B1 6706 E4
1721 A4 2754 D4 3745 A2 6707 E4 ADJUST
2701 E8 2755 B4 3746 A1 6708 E4
MOTOR SPEED
2702 E8 2756 C4 3747 B2 6709 D4
2703 E2 2759 A8 3748 C1 7701 D2
2704 C6 2760 A8 3749 C7 7702 D3
2705 E6 2761 B5 3750 C6 7704 E6
2706 B5 2762 C7 3752 B6 7709 B3
2707 B3 2763 E7 3753 D5 7710 B2
2708 A3 3701 E8 3754 A7 7711 C1
2709 D2 3702 D3 3755 A6 7712 B6
CHECK
2710 C2 3703 E2 3756 A7 7713 A5
WOW & FLUTTER
2711 A2 3704 D2 3757 B7 7714 A7
2712 C6 3705 D2 3758 E2 7715 B7
2713 E5 3706 D6 3759 E5 7716 B6
2714 D5 3707 E6 3760 E4 7717 C3
2715 B4 3708 E5 3761 C3 7718 B4
2716 A3 3709 E6 3763 D2 7719 B4
2718 D7 3711 A5 3764 B4 7722 C3
2719 D5 3712 B5 3765 A6 9717 E8
2720 B4 3713 B8 3766 B7 9720 C3 ADJUST
2721 E6 3714 C7 3767 A7 9730 E7
AZIMUTH
2722 E5 3715 C8 3768 C3 9733 E3
2723 E7 3716 D8 3769 C4 9736 E3
2724 E7 3717 B5 3770 C3 9737 D4
2725 A6 3718 C5 3771 E4 9740 B2
2726 A6 3719 C5 3772 E5 9747 C7
2727 D8 3720 C5 3773 B4 9750 B8
Playback
2728 C5 3721 C5 3774 C4 9751 B8
2729 E5 3722 C5 3775 C4 9752 D8
2730 D4 3724 A5 3776 C4 9753 D7
2731 D5 3725 C8 3777 C4 9754 B5
2732 D7 3726 B8 3778 D6 9755 A5
CHECK
2733 B6 3727 A5 3779 B3 9756 A5
2734 E7 3728 C7 3780 C1 9757 D1
PLAYBACK
2735 C7 3729 D7 3781 D4 9758 E3
2737 E6 3730 C7 3782 E7 9759 E3
FREQUENCY RESPONSE
2738 D7 3731 D6 3785 E6 9760 E4
2740 A5 3732 A3 3786 C2 9762 B7
2741 A6 3733 A4 3787 E6
2743 A1 3734 A3 3788 C7
Recording
PRE-ADJUST
BIAS
CHECK
OVERALL
FREQUENCY RESPONSE
0071 B1 2744 C2 3735 D3 3789 D7
Input signal: 3mV
0072 A3 2745 E1 3736 E4 3790 B3
1702 E4 2747 D2 3737 D2 3791 B2
100Hz, 250Hz, 1kHz,
1707 B8 2748 B7 3738 D2 3792 B3
1709 E8 2749 D6 3740 D2 3793 A5 10kHz
1710 E8 2751 E3 3741 D1 5701 A7
1711 A8 2752 C8 3742 E1 6703 B6
1719 E3 2753 B4 3743 E1 6706 A4
via 3 or 4
1721 E4 2754 B3 3745 E2 6707 A4
2701 A8 2755 D5 3746 D1 6708 A4
2702 A8 2756 C4 3747 D2 6709 B4
2703 A2 2759 E8 3748 C1 7701 B2 CHECK
2704 C6 2760 E8 3749 C7 7702 B3
DISTORTION
2705 A6 2761 D5 3750 C6 7704 A6
2706 D5 2762 C7 3752 D6 7709 D3
Input signal: 300mV
2707 C3 2763 A7 3753 A4 7710 D2
2708 E3 3701 A8 3754 E7 7711 C1
1kHz
2709 B2 3702 A3 3755 E6 7712 C6
2710 C2 3703 A2 3756 E7 7713 E5
via 3 or 4
2711 E2 3704 B2 3757 E7 7714 E7
2712 C6 3705 B2 3758 A2 7715 D7
2713 A5 3706 B5 3759 A5 7716 D6
2714 B5 3707 A6 3760 A4 7717 C3
2715 D4 3708 A5 3761 C3 7718 D4 Remark: If high frequencies are not within lower limit, decrease bias and re-measure.
2716 D4 3709 A6 3763 B2 7719 D4
If distortion is too high increase bias and re-measure.
2718 B7 3711 E5 3764 E4 7722 C3
2719 B5 3712 E5 3765 E6 9717 A8
2720 D4 3713 D8 3766 D7 9720 C3
2721 A6 3714 C7 3767 E7 9730 A7
level(dB)
2722 A5 3715 B8 3768 C3 9733 A3
2723 A7 3716 B8 3769 C4 9736 A3
2724 A7 3717 E5 3770 C3 9737 B4
2725 D6 3718 C5 3771 A4 9740 D2
2726 E6 3719 C5 3772 A5 9747 C7
2727 B8 3720 D4 3773 D4 9750 E8
2728 C5 3721 C5 3774 D4 9751 D8
8dB
2729 A6 3722 C5 3775 C4 9752 B8
2730 B4 3724 E6 3776 C4 9753 B7
2731 B5 3725 C8 3777 C4 9754 D5
2732 B7 3726 D8 3778 B6 9755 E6
2733 D6 3727 D5 3779 D3 9756 E5
2734 A7 3728 C7 3780 C2 9757 B1
2735 C7 3729 B7 3781 B4 9758 A3
2737 B6 3730 C7 3782 A7 9759 A3
2738 B7 3731 B5 3785 A6 9760 A4
2740 E6 3732 E3 3786 C2 9762 D7
80
2741 E6 3733 E4 3787 A6
2743 E1 3734 E3 3788 C8
9-3
TEST
RECORDER MEASURE
READ ON
CASSETTE ON
MODE
1 or 2
SBC420
frequency
PLAY
(4822 397 30071)
LEFT RIGHT
deck A or B counter
3150Hz
or
headphone socket
1 or 2
SBC420
PLAY
W&F-meter
(4822 397 30071)
LEFT RIGHT
deck A or B
3150Hz or
headphone socket
PLAY deck A
SBC420 1 2
mV-meter
(4822 397 30071)
or
LEFT RIGHT
10kHz
or oscilloscope
PLAY deck B
headphone socket
PLAY deck A
SBC420
1 or 2
mV-meter
(4822 397 30071)
LEFT RIGHT
PLAY deck B
5
FERRO RECORD mV-meter
FERRO RECORD
RECORDED
or
1 2
mV-meter
PLAY
CASSETTE
LEFT RIGHT
FERRO RECORD
RECORDED or
1 2
THD-meter
PLAY
CASSETTE
LEFT RIGHT
level(dB)
8dB
6dB 8dB
(10dB HSD)
f(Hz)
250 4k 10k 100 250
figure. 1
ADJUST
with to
3150Hz ±1%
3758
≤0.4 % DIN or
check only
≤0.35 % CCIR
max. output level
left hand screw
& left=right
Check limits see fig.1
14V rms
5701
(40V pp )
check only limits see fig.2
≤5%
check only
adj. ECO MTF DD AS, 110399
8dB
6dB
(10dB HSD)
f(Hz)
4k 10k
figure. 2