Procedure For Installation, Checking And Adjustment - Hantarex POLO 10" Manual De Servicio

PROCEDURE FOR INSTALLATION, CHECKING AND ADJUSTMENT

1) MAINS SUPPLY 220 - 240 V a.c. Europe
Insert a mains lead into the 3-way input connector (J101) using a cable of suitable dimensions in
accordance with standard EN 60950. Take care that the colours of the wires in the cable are inserted into
the correct positions for 11live" and "neutral11, by following the indications printed on the monitor p.c.b.
For connecting the earth wire of the mains cable, use the termination, the screw and the stainless steel
washer provided and fasten securely to the threaded metal post on the metal framework.
of the J101 connector must NQT be used,
international safety standards.
The correct method of connexion is shown in the illustration on page 10.
2) VIDEO SIGNAL AND SYNC. CONNEXIONS
Insert the signal input cable into the 6-way connector J106 paying attention to the correct sequence of the
colour inputs that is printed on the monitor p.c.b.
models.
3) POSITION OF THE DEFLEXION YOKE CABLE
As two connectors (J 113
be moved into the adjacent connector should the image be inverted both vetrtically and horizontally.
4) DEFLEXION ADJUSTMENT
Adjust the trimmers situated on the remote control board CR according to the requirements of the video
signals. Following those adjustments, any trapezoidal or pin cushion distortions should be eliminated by
use of the trimmers on the EAST /WEST BOARD JA.
The trimmers on both those modules have their functions printed on the p.c.b.
5) BLACK AND WHITE LEVEL SETTINGS
Polo monitors are factory adjusted with optical instruments for measuring the colour co-ordinates of the
c.r.t. to obtain the correct colour temperature white.
Should it be necessary to adjust that pre-alignment, following the ensuing instructions:
BLACK LEVEL
a) Leave the monitor turned on for at least 1
b) Remove the video signal
c) Set the CUT-OFF trimmers on the c.r.t. base assembly, RV3 (Red), RV4 (Green) and RV5 (Blue) so as
to obtain a voltage of 180 V at the collectors of transistors T2, T 4 and T6.
d) Adjust the contrast trimmer RV 405 to minimum (anti-clockwise) and the brightness trimmer RV 406 to
maximum (clockwise).
e) Adjust the G2 control (situated on the line output transformer and labelled 11screen11) to obtain a raster
that is only just visible.
f) Eliminate the predominating colour by adjustment of trimmers RV3/RV4/RV5 so as to obtain the best
grey possible.
This adjustment may be accompanied by an increase in brightness. In that case, the G2 voltage should
be reduced to obtain once more a barely visible raster, and the adjustments should be repeated.
WHITE LEVEL
a) Leave the monitor switched on for at least 1
b) Remove the video signal
c) Adjust the controls on on the remote control module CR for maximum brightness (RV 406) and contrast
(RV 405).
d) Insert the bridge 11TEST VIDE011 situated on the remote control module CR into the ON position so as to
obtain vertical white lines.
e) Adjust the trimmer RV 1 (Red gain) and RV 2 (Green gain) or alternatively RV 6 (Blue gain) on the c.r.t.
neck board to obtain the best white possible.
110 V a.c. U.S.A.
I
it being of insufficient dimensions to carry the current set by
N.B. the sequence is RGB and NOT BGR as on earlier
J 114) are provided with cross connexions, the deflexion yoke cable should
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The central pin