Displaying A Test Signal On A Jumbotron Display Unit - Sony JumboTron Operating Instructions Manual

Displaying a Test Signal on a JumboTron Display
Unit
POWER switch
CURSOR ◊/√/∫/ı
buttons
You can display eleven types of test signals on a JumboTron display unit.
Use this mode to clear the cause of the malfunctions of a unit or to check
the operation of a unit, cell or pixel after replacing or adjusting it.
After selecting the type of the test signal, you can specify precisely the
luminance, brightness, scroll speed and color bar width of each test signal.
The types of the test signals and their functions are described below.
Type of test signal
WHITE White signal
Blue signal
BLUE
RED Red signal
GREEN Green signal
STAIR STEP Uniform bit signal
Vertical color bar
COLOR BAR-V
signal
COLOR BAR-H Horizontal color bar
signal
CHARACTERS Character signal
BEAM BLANKING Pattern with
alternate line
blanking
Scrolls all the test
TEST
signals.
Adjusts the
RASTER
luminance of red,
green and blue,
separately in the
range of 256 levels.
Operations and circuits to be checked
Uniformity of pixel light emission, etc.
Bit errors, etc.
Timing of data latch, etc.
Cathode switching circuit
All-round check of a JumboTron display
unit or a cell
Characteristics of pixel light emission,
etc.
SPG button
SETUP button
ENTER button
Numeric buttons
13