Lock Control; S Rgb; Customer Convergence; Moire Adjustment - Sony CPD-G400 Training Manual

Image Restoration
This circuit is operated by the customer to automatically white balance
the picture. This is achieved by adjusting the RGB drive (signal) levels to
compensate for reduced cathode emission. At the factory, the "Ik" volt-
ages corresponding to each RGB cathode current are stored into memory.
When this circuit is activated from the menu, the screen turns white for
one second as the gain of the R, G or/and B drive levels are increased.
When the measured Ik voltages are matched to the ones in memory, the
operation is complete and the new drive levels are stored. The circuit
details are in the Video Output text where the Image Restoration circuit
resides.

Lock Control

All customer functions can be inhibited from the Option menu except the
front panel Input and Power switches. This is used to prevent children
from resetting all your monitor settings.

S RGB

This is a preset industry standard color setting used with information from
the internet and with a sRGB compliant printer. When a sRGB standard
color object is indicated on the internet, you may view it in that true color
by selecting sRGB from the menu's color group. If you have a sRGB
printer you may print the object at that color too.
The sRGB setting just fixes the brightness and color levels to pre-estab-
lished settings.

Customer Convergence

The customer can move the red and blue centering adjustments from the
menu. This can be done in the horizontal and vertical plane.
Moiré Adjustment
When fine lines are viewed though other fine lines, additional patterns are
developed when the lines do not coincide. For example if you were look-
ing at a window blind through a box fan (with a grill), some lines would not
be visible and others would appear distorted. This is the Moiré effect. In
a monitor it corresponds to picture lines presented on a vertical slotted
CRT internal aperture grill.
The Moiré adjustment affects high frequency video response.

Reset All User Adjustments

You can reset all user adjustments by pressing and holding the front panel
RESET button in for two seconds when there is NO menu displayed on
the screen. All menu customer settings are then reset to default levels
except:
• The menu language
• The menu position
• The Control Lock function if it was ON. The reset button does not
work when the lock is ON.

Reset Just One User Adjustment

Entering the menu setting you wish to reset with the control button and
pressing the RESET button does this.

Self Diagnostic Function

The front panel orange/green LED is used to determine what section
caused the monitor to enter the protection state. This is explained in the
Self-Diagnostic Function section of this book.
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