Sony Trinitron GDM-FW900 Service Manual page 11

Restoring the color from the EASY or sRGB menus
(IMAGE RESTORATION function)
The colors of most display monitors tend to gradually lose brilliance
over several years of service. The IMAGE RESTORATION feature
found in the EASY and sRGB menus allows you to restore the color
to the original factory quality levels.
1
Move the joystick left or right to select EASY or
sRGB mode.
2 First move the joystick up or down to select
(IMAGE RESTORATION). Then move the
joystick to the right.
The picture disappears while the color is being restored (about
2 seconds). After the color is restored, the picture reappears
on the screen again.
Notes
• Before using this feature, the monitor must be in normal operation
mode (green power indicator on) for at least 30 minutes. If the monitor
goes into power saving mode, you must return the monitor to normal
operation mode and wait for 30 minutes for the monitor to be ready.
You may need to adjust your computer's power saving settings to keep
the monitor in normal operation mode for the full 30 minutes. If the
monitor is not ready, the following message will appear.
COLOR
EASY EXPERT s R G B
5 0 0 0 K 6 5 0 0 K 9 3 0 K 0
5 0 0 0 K
I MAGE
RES TORA T I ON
AVA I L AB L E
A F T ER WARM UP
• The monitor may gradually lose its ability to perform this function due
to the natural aging of the picture tube.
14
Adjusting the quality of the picture
(SCREEN)
The SCREEN settings allow you to adjust the quality of the
picture by controlling the moire and landing.
• If the color is irregular at the corners of the screen, adjust the
landing.
• If elliptical or wavy patterns appear on the screen, cancel the
moire.
The CANCEL MOIRE and MOIRE ADJUST settings are stored
in memory for the current input signal. All other settings are
stored in memory for all input signals.
1 Press the joystick.
The main MENU appears on the screen.
2 Move the joystick to highlight SCREEN and
press the joystick again.
The SCREEN menu appears on the screen.
3
First move the joystick up or down to select the
desired adjustment item. Then move the joystick left
or right to make the adjustment.
Select To
reduce any color irregularities in the
screen's top left corner to a minimum.
LANDING
reduce any color irregularities in the
LANDING screen's top right corner to a
minimum.
reduce any color irregularities in the
screen's bottom left corner to a
LANDING
minimum.
reduce any color irregularities in the
screen's bottom right corner to a
LANDING
minimum.
turn the moire cancellation function
CANCEL MOIRE* ON or OFF.
(MOIRE ADJUST) appears in
the menu when you select ON.
adjust the degree of moire
cancellation until the moire is at a
MOIRE ADJUST
minimum.
* Moire is a type of natural interference which produces soft, wavy lines
on your screen. It may appear due to interference between the pattern
of the picture on the screen and the phosphor pitch pattern of the
monitor.
Example of moire
Note
The picture may become fuzzy when CANCEL MOIRE is set to ON.
Adjusting the convergence (CONV)
The CONV settings allow you to adjust the quality of the picture
by controlling the convergence. The convergence refers to the
alignment of the red, green, and blue color signals.
If you see red or blue shadows around letters or lines, adjust the
convergence.
These settings are stored in memory for all input signals.
1
Press the joystick.
The main MENU appears on the screen.
2 Move the joystick to highlight CONV and press
the joystick again.
The CONVERGENCE menu appears on the screen.
3
First move the joystick up or down to select the
desired adjustment item. Then move the joystick left
or right to make the adjustment.
Select To
horizontally shift red or blue shadows
vertically shift red or blue shadows
vertically shift red or blue shadows at
TOP
V CONVER TOP the top of the screen
vertically shift red or blue shadows at
BOT
the bottom of the screen
V CONVER
BOTTOM
Additional settings (OPTION)
You can manually degauss (demagnetize) the monitor, change the
menu position, and lock the controls.
1 Press the joystick.
The main MENU appears on the screen.
2
Move the joystick to highlight OPTION and press
the joystick again.
The OPTION menu appears on the screen.
3 Move the joystick up or down to select the desired
adjustment item.
Adjust the selected item according to the following
instructions.
x Degaussing the screen
The monitor is automatically demagnetized (degaussed) when the
power is turned on.
To manually degauss the monitor, first move the
joystick up or down to select (DEGAUSS). Then
move the joystick to the right.
The screen is degaussed for about 3 seconds. If a second degauss
cycle is needed, allow a minimum interval of 20 minutes for the
best result.
x Changing the menu's position
Change the menu's position if it is blocking an image on the
screen.
To change the menu's on-screen position, first move
the joystick up or down to select (OSD H POSITION)
for horizontal adjustment, or (OSD V POSITION) for
vertical adjustment. Then move the joystick left or right
to shift the on-screen menu.
x Locking the controls
To protect adjustment data by locking the controls, first
move the joystick up or down to select (CONTROL
LOCK). Then move the joystick to the right, to select
ON.
Only the ! (power) switch, EXIT, and
(CONTROL LOCK)
of the OPTION menu will operate. If any other items are
selected, the mark appears on the screen.
To cancel the control lock
Repeat the procedure above and set (CONTROL LOCK) to OFF.
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