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Philips N4504/00/15 Serviceanleitung Seite 9

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Verfügbare Sprachen

Verfügbare Sprachen

AUTOMATIC SWITCH-OFF (Fig. 15)
- With magnet B pulled-on and keys START
(A) and
REC (E) pressed, the magnet should be moved so
far that the keys are mechanically released
(screws D loosened).
- Anchor B should be parallel to fork B of the stop
bracket.
SLIDE SWITCHES (Fig. 16)
- With keys pushed-in and lever switches
in upper
position, the front of the switch housing should
be in area A of the slider. Adjustments can be
made by bending the intermediate bracket.
- With keys in off-position, lever switches
MONITORING
and ONL
in lowest position and
lever switches
in middle position, the back of
the switch housing should be in area B of the
slider. Adjustments can be made by bending the
intermediate bracket.
FAST WINDING
- Insert a tape
With pressure roller magnet off, the distance
between tape and heads should be 1-1.5 mm.
To make adjustments:
bend the tape take-off pins.
- The current through the pulling motor should be
abt. 150 mA at the beginning and 500 mA at the
end of the tape.
os
- With transport blocked, the current through the
pulling motor should be abt. 760 mA.
- The current through the motor pulled should be
abt. 80 mA at the beginning and 0 mA at the end
of the tape.
PLAYBACK
Insert a tape.
The current through the pulling motor should be abt.
230 mA. The current through the motor pulled should
be 25-30 mA
SPEED ADJUSTMENT
- Connect a wow and flutter meter to BU3 LINE
IN/OUT. Insert a test tape with a frequency of
3,150 Hz, recorded at 4.75 cm/sec, 9.5 cm/sec or
19 cm/sec, depending on the speed to be adjusted,
and play it back.
Adjust the right speed with one of the trimming
potentiometers (see table below).
After the speed adjustment, the wow and flutter
may be as indicated in the table below.
Trimming potentiometer | Wow and flutter
4.75 cm/sec
0.2 %
9.5
cm/sec
0.2 %
19
cm/sec
0.15%
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