97
3.4.
Information
for
assistance
in
fault-finding
3.4.1.
MAINS
TRANSFORMER
DATA
The available unloaded
voltage tappings and the number of turns per winding
are listed in the
circuit
diagram
in
the form
of
a
table.
3.4.2.
VOLTAGES AND WAVEFORMS IN THE INSTRUMENT
The
d.c.
voltage levels
at the
electrodes of the transistors
and the
voltage
waveforms in the time-base
generator
are
shown
at
the
relevant points on
the
circuit diagram.
The waveforms
have been measured under the following conditions:
—
Input
signal on
socket BUS: 2
kHz
sine-wave
voltage for
6
cm
deflection
—
LEVEL potentiometer
R3
in mid-position
—
TIME/cm switch
SK2 to .2 ms and X
MAGN
switch
SKI to x1
—
Y/\,
+
and
AUTO push-buttons SK4, SK8 and SKIO
depressed
-
AMPL switch
SK17
to
1
V/cm
The voltage values are
typical and may
slightly differ
per instrument.
3.4.3.
REMARK
In case of
a
defect it is always possible
to apply
to
the world wide PHILIPS
Service Organization.
When the instrument is
to be
sent
to a
PHILIPS Service Workshop for
repair, the
following points should be
observed:
—
Attach
a
label with your name and address
to the
instrument
—
Give
a
complete description
of
the faults found
—
Use
the
original packing, or,
if
this is no longer available,
carefully
pack the instrument in
a
wooden
crate
or
box
—
Send the
Instrument
to
the address obtained
after
consultation
with the local PHILIPS Organization.
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