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PRECAUTION" AND "PRODUCT SAFETY NOTICE" ON PAGE 2 OF THIS MANUAL.
INSTALLATION AND SERVICE ADJUSTMENTS
GENERAL INFORMATIONS
All adjustments are thoroughly checked and corrected
when
the receiver
leaves the factory. Therefore
the
receiver should operate normally and produce proper
colour and B/W pictures upon installation. However,
several
minor
adjustments
may
be
required
depending
on the particular
location
in which
the
receiver is operated.
This
receiver
is shipped
completely
in cardboard
carton. Carefully draw out the receiver from the carton
and remove all packing materials. Plug the power cord
into a convenient 220 volts 50 Hz AC two pin
power
outlet. Turn the receiver ON.
Check and adjust all the
customer
controls
such
as
BRIGHTNESS,
CONTRAST
and COLOUR
Controls to obtain natural
colour or B/W 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 one
hour
in order
that the
automatic
degaussing
circuit
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 picture tube, the sides
and front of the receiver and slowly withdraw the coil
to a distance of about 2 m before disconnecting it
from
AC
source.
If colour
shading
still persists,
perform
the
COLOUR
PURITY
ADJUSTMENT
and
CONVERGENCE ADJUSTMENTS procedures.
HIGH VOLTAGE CHECK
CAUTION:
There
is no HIGH
VOLTAGE
ADJUST-
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.
HEIGHT ADJUSTMENT
1. Receive
the
UK
PHILIPS
pattern,
and
set
the
contrast, colour and brightness to centre.
2. Adjust HEIGHT Control (R351) so that white blocks
at top and bottom of the picture are just masked.
HORIZONTAL CENTRE
ADJUSTMENT
1. Receive the UK PHILIPS 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
ADJUSTMENT
Adjust FOCUS Control on FLYBACK TRANS. (1461) for
well defined scanning lines in the centre area on the
screen.
PAL MATRIX ADJUSTMENT
1.
2.
3.
Tune in the colour programme of the Philips pattern.
Set the COLOUR
Control
to obtain
the proper
colour.
If the
PAL
MATRIX
adjustment
is incorrect,
the
Venetian Blind would appear in the colour bars area.
This case needs the adjustment.
. At the first, adjust DL PHASE ADu. Coil (L551) to
minimize the Venetian Blind.
Next adjust 1H-DL ADJ. VR (R551) to minimize the
Blind.
. If the Venetian
Blind
still remains,
adjust
1H-DL
PHASE
ADJ.
Coil (L551) to minimize
the Blind
again.
. Repeat
the item
5 and
6 procedures,
adjust the
R551 and L551 until the Blind does not appear.
CRT GREY SCALE ADJUSTMENT
10.
11.
Pm Nes
Tune in an active channel.
Set the SERVICE
SW.
(S202) in the
"H. LINE"
position.
Turn the SCREEN
Control (on T7461) fully counter-
clockwise.
By rotating the RED, GREEN and BLUE CUT OFF
Controls (R557, R558, R559) to the mid position.
Set the GREEN
and BLUE DRIVE Controls (R252,
R253) to the center.
Rotate the SCREEN
Control gradually
clockwise
until the first line appears slightly on the screen.
Set the SCREEN Control to this position.
Adjust the CUT OFF Controls to obtain
the slightly
lighted horizontal lines in the same
levels of three
colours (RED, GREEN and BLUE).
The lines may
look like white
if the
CUT
OFF
Controls are adjusted properly.
Set the SERVICE
SW.
(S202) in the "RECEIVE"
position.
Set the CONTRAST
and
COLOUR
Controls
to
minimum,
and
BRIGHTNESS
Control
to the
maximum.
Adjust the BLUE
and
GREEN
DRIVE
Controls
(R252/R253) to obtain proper white-balanced picture
in high light areas.
Set the BRIGHTNESS and CONTRAST
Controls to
obtain dark grey
raster.
Then
check
the white
balance in low brightness. If the white balance is not
proper, retouch the CUT OFF Controls and DRIVE
Controls to obtain a good white balance in both low
and high light areas.
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