Measure the voltage between the -48V (the external power supply) and the GND terminals on the PDP , whose normal value should be between -57V and -40V .
If the voltage value measured in either procedure 1 or 2 is not within the required range, installers should trouble shoot the power supply equipment and the cables until the voltage value meets the requirement.
Place each main and brach ACB on the PDP to the ON position.
When all results of the above examinations meet the requirements,the power-on of the cabinet is confirmed to be normal