Sony Jumbotron JME-UA200, Service Manual

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1-7 (E)
JME-UA200
12
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.
Displaying a Test Signal on a JumboTron Display
Unit
Type of test signal
WHITE
BLUE
RED
GREEN
STAIR STEP
COLOR BAR-V
COLOR BAR-H
CHARACTERS
BEAM BLANKING
TEST
RASTER
White signal
Blue signal
Red signal
Green signal
Uniform bit signal
Vertical color bar
signal
Horizontal color bar
signal
Character signal
Pattern with
alternate line
blanking
Scrolls all the test
signals.
Adjusts the
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.
POWER switch
CURSOR ◊ / √ / ∫ / ı
buttons
SPG button
SETUP button
ENTER button
Numeric buttons
13
1
Selecting the test signal to be displayed
1
Set the POWER switch to ON.
The title menu appears in the display window, then the display changes
to the UNIT type select menu.
2
Press the
◊
or
√
button to select the type of the JumboTron display
unit, and press the ENTER button.
3
Press the SPG button.
4
Select the signal to be displayed with the ∫ or ı button or the 0 to A
numeric buttons.
The test signal mode changes in the following order each time you
press the
∫
button. (Pressing the
ı
button changes the mode in the
reverse order.) You can also select the test signal mode by pressing the
button in brackets.
WHITE [0] BLUE [1] RED [2] GREEN [3] STAIR STEP [4] COLOR BAR-V [5] COLOR BAR-H [6]
RASTER [A] TEST [9] BEAM BLANKING [8] CHARACTERS [7]
Example: Selecting COLOR BAR-V by pressing ∫ or ı button or
numberic button 5.
5
Press the ENTER button.
The selected test signal is displayed on the JumboTron display unit.
(Continued)
Title menu UNIT type select menu
Type of test signal
Current luminance
Current brightness
Scroll speed
Color bar width
Luminance of R, G and B of the cell in the
upper left corner of the unit (The data is
displayed in hexadecimal.)
JumboTron display unit type
S P G M o d e
S P G : C O L O R B A R - V
B R T : 0 7
S P D : 0 3
L U M : 0 7 F
W I D : 0 1
U N I T T Y P E : J T U - 3 5
S O N Y
J u m b o T r o n
J M E - U A 2 0 0
v e r 1 . 0
S e l e c t U N I T T y p e
J T U - 3 5 S e r i e s
J T U - 1 7 S e r i e s
L D U - 1 5 S e r i e s
S P G M o d e
S P G : W H I T E
B R T : 0 7
S P D : - -
L U M : 0 7 F
W I D : - -
B / 0 7 F R / 0 7 F G / 0 7 F
U N I T T Y P E : J T U - 3 5