Cameron KS21TK305A, Руководство по обслуживанию

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SERVICE MANUAL
33
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Vertical shift
•
Vertical zoom
•
Vertical scroll
•
Vertical linearity correction. When required the linearity setting for the upper and lower part of the
screen can have a different setting.
•
Horizontal shift
•
EW width
•
EW parabola width
•
EW upper and lower corner parabola correction
•
EW trapezium correction
•
Horizontal parallelogram and bow correction.
When the vertical amplitude is compressed (zoom factor <1) it is still possible to display the
black current measuring lines in the overscan. This function is activated by means of the bit OSVE
in subaddress 40H.
The vertical guard input is combined with an I/O function. The following functions can be
realised with this pin:
•
Just vertical guard input.
•
Combination of vertical guard and LED drive output. In this condition the output is high-ohmic
during the vertical retrace (1 ms) so that the vertical guard pulse can be detected.
•
Single ended output switch
•
Input port
The functionality of this pin is controlled by the VGM1/0 and LED bits.
When the East-West geometry function is not required (e.g. for 90
°
picture tubes) the EW
output pin can be used for the connection of the AVL capacitor. This function is chosen by means of
the AVLE bit.
The UOCIII devices can also be used as input processor for 100 Hz or LCD TV receivers. In
that case the deflection drive signals are not required. For these applications, H/V timing signal can
be obtained from the H-drive and VDRB output pins. The polarity of these pulses is negative. For
the H-output a pull-up resistor is required. The sandcastle signal will be available on the FBISO pin.
This mode is activated by means of the LCD bit (subaddress 4AH). A change of the LCD bit is
possible only in the stand-by mode (STB = 0).
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