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WARNING:
BEFORE SERVICING THIS CHASSIS, READ THE ·X-RAY RADIATION PRECAUTION",
·SAFETY
PRECAUTION"
AND ·PROOUCT SAFETY NOTICE" ON PAGE 2 OF THIS MANUAL.
INSTALLATION
ANO SERVICE ADJUSTMENTS
GENERAL INFORMATlONS
AII adjustments are thoroughly checked and corrected
when the receíver leaves the facfory. Therefore the
receiver should operate normally and produce proper
colour and B/'IN pictures upon installation. However.
several
minor
adjustments
may
be
required
dependíng
on the particular
location
in which
the
receiver is operated.
This receiver
is shipped
completely
in cardboard
carton. Carefully draw out the receíver trom the carton
and remove all packing
materlals,
Plug the power cord
into a convenient 240 volts 50 Hz AC two pin
power
outlet. Turn the receiver ON. Check and adjust all the
customer
control
s
such
as
BRIGHTNESS,
CONTRAST
and
COLOUR Controls to obtain natural
colour or B/'IN picture.
AUTOMATIC
DEGAUSSING
A degaussing coil is mounted around the picture tube
so that external degaussing after moving the receiver
is normally
unnecessary,
providing
the receiver
is
properly degaussed upon installation. The degaussing
coil operates for about 1 second after the power to the
receiver is switched ON. If the set is moved or faced
in a different
direction,
the power switch must be
switched
off at least 30 minutes in order that the
autornatic
degaussing
clrcuit
operates
properly.
Should the chassis or parts of the cabinet become
magnetized
to cause
poor colour
purity,
use an
external degaussing coil. Slowly move the degaussing
coil around the faceplate of the
pícture
tube. the sides
and front of the receiver and slowly withdraw the coil
to a distance of about 2 m befo re disconnecting
it
from AC source.
If colour shadíng
still persists.
perform
the COLOUR
PURITY ADJUSTMENT
and
CONVERGENCE AOJUSTMENTS procedures.
HIGH VOLTAGE CHECK
CAUTION:
There is no HIGH VOLT AGE AOJUST·
MENT on this chassis.
1. Connect
an accurate
high voltage meter to the
second anode of the picture tube.
2. Turn on the receiver. Set the BRIGHTNESS and
CONTRAST
Controls
to minimum
(zero beam
current).
3. High voltage will be measured below 29.0 kV.
HORIZONTAL
CENTRE ADJUSTMENT
1. Receive too UK PHILlPS pattern.
2. Set the contrast and colour to centre.
and the
brightness to centre.
3. Adjust H. CENTER USER Control (R452) so the
pattern centre can be located at the screen centre.
FOCUS AOJUSTMENT
Adjust FOCUS Control on FLYBACK TRANS. (T461)
tor
well defined scanning lines in the centre area on the
screen.
SIF FM DET (LG04) ADJUSTMENT
(NICAM BOARD)
1. Connect SIF generator through 0.01 pF capacitor to
pin 01
01
POOl on NICAM Board.
2. Connect the oscilloscope to pin 9 01 IC003.
3. Set up the SIF generator as described below.
Sound carrier frequency:
6.0 MHz
Modulation frequency
: 1000 Hz
Frequency deviation
:
±
15 kHz
Signallevel
: 100 dBp (50 ohm load)
4. Adjust LG04 for the maximum response of 1000 Hz
det-out on scope.
-9-
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