LC1200R User’s Guide
021-0183-00 Rev A
17 of 29
The LC1200R is not damaged by input voltages ranging from 0-vdc to 12.4-vdc.
5.3
Power On-Off Sequences
The LC1200R will automatically return to normal operation upon resumption of power after a power
loss.
6
User Controls
6.1
LCD Controller Board Controls
The display comes from the factory adjusted for the supported modes. When using these modes,
adjustment should not be necessary. However, if it should become necessary, or a non-supported
mode is selected, the following controls are available for adjustment.
There are 4 push buttons located on the back of the display, which allow adjustment of the displayed
image.
The provided controls are:
Name
Function
Dot Clk -
Clock Frequency/Phase Decrease
Dot Clk +
Clock Frequency/Phase Increase
Horiz
Horizontal Position Adjustment
Vert
Vertical Position Adjustment
Gain
Video Gain Adjustment
The Clock Frequency /Phase adjustments are dual function buttons. The clock frequency adjustment
is used to change the horizontal size of the displayed image. The Phase adjustment is used to
minimize the pixel ‘noise’ or ‘jitter’. The phase allows for 32 positions of phase control. If the button is
held down, the clock frequency is adjusted up or down 1 clock each time the phase control register
rolls over. To adjust the clock frequency further, continue to hold the button down. If phase
adjustment is desired, it’s best to use single presses.
The Horizontal Position is adjusted by holding down the Horiz button. The position will shift by 1
column for each press. If the button is held down, the position will continuously adjust until released.
The direction of the adjustment depends on the direction of the last adjustment. The direction will
continue to be true until the maximum or minimum adjustment is reached. At this point, the
direction will reverse.
The Vertical Position is adjusted by holding down the Vert button. The position will shift by 1 column
for each press. If the button is held down, the position will continuously adjust until released. The
direction of the adjustment depends on the direction of the last adjustment. The direction will
continue to be true until the maximum or minimum adjustment is reached. At this point, the
direction will reverse
