SONY SDM P232W - LCD MONITOR - Self-Diagnosis - APQ Adjustment - Power and Inverter Schematic

Power - Back-Light Inverter Circuit Diagrams - Self Diagnosis - Automatic Picture Quality [APQ] FUNCTION - Sony SDMP232W - LCD Monitor

SELF DIAGNOSIS

This monitor is equipped with a self-diagnosis function. If there is a problem with your monitor or computer(s), the screen will go blank and the (power) indicator will light up green. If the (power) indicator is lit in orange, the computer is in power saving mode. Try pressing any key on the keyboard or moving the mouse.

If the picture disappears from the screen and the (power) indicator is green

> Turn off the (power) switch and disconnect the video signal cables from the monitor.
> Turn the monitor on by pressing the (power) switch.

If all four colour bars appear (white, red, green, blue), the monitor is working properly. Reconnect the video input cables and check the condition of your computer(s).
If the colour bars do not appear, there is a potential monitor failure. Inform your authorized Sony dealer of the monitor�s condition.

POWER CIRCUIT DIAGRAM

BACK-LIGHT INVERTER CIRCUIT DIAGRAM

AUTOMATIC PICTURE QUALITY ADJUSTMENT - ANALOG RGB SIGNAL ONLY

When the monitor receives an input signal, it automatically adjusts the picture�s position and sharpness (phase/pitch), and ensures that a clear picture appears on the screen.

The factory preset mode

When the monitor receives an input signal, it automatically matches the signal to one of the factory preset modes stored in the monitor�s memory to provide a high quality picture at the centre of the screen. If the input signal matches the factory preset mode, the picture appears on the screen automatically with the appropriate default adjustments.

If input signals do not match one of the factory preset modes
When the monitor receives an input signal that does not match one of the factory preset modes, the automatic picture quality adjustment function of this monitor is activated to ensure that a clear picture always appears on the screen (within the following monitor frequency ranges):
Horizontal frequency: 28�92 kHz
Vertical frequency: 48�85 Hz
Consequently, the first time the monitor receives input signals that do not match one of the factory preset modes, the monitor may take a longer time than normal to display the picture on the screen. This adjustment data is automatically stored in memory so that next time, the monitor will function in the same way as when the monitor receives the signals that match one of the factory preset modes.

If you adjust the phase, pitch, and picture position manually
For some input signals, the automatic picture quality adjustment function of this monitor may not completely adjust the picture position, phase, and pitch. In this case, you can set these adjustments manually.  If you set these adjustments manually, they are stored in memory as user modes and automatically recalled whenever the monitor receives the same input signals.