LaserActive:CLD-A100 Power Supply Testing

The Nichicon power supply in the Pioneer Laseractive CLD-A100 will not produce all of it's DC voltage outputs by simply plugging it into the mains. It requires that the power switch be engaged and that it receives a "POWER ON" signal from the Interface (INTF) board mode control ASIC. However, if it is desired to test the power supply for troubleshooting or after servicing, there are two locations to short circuit in order to get the power supply into "Bench Test" mode.

Power Supply Bench Test Mode
First, short the two pins of CN002 (power switch connector), which will allow the AC-DC converter circuitry on the primary side to operate. This will allow the "EVER +5V" rail to come up.

It is now possible to measure all of the voltages on the power supply. The power supply can be inserted back into the chassis in order to use the AC power connector provided there (do not connect any of the ribbon cables at this time).

Please exercise caution - as soon as the AC power cable is plugged into the mains, the power supply will be energized. Use due diligence to ensure that nothing is shorted to the chassis when performing testing.

Measuring Power Supply Voltages
When measuring voltages on the power supply, either measure at the connectors directly, or on the side of the circuit protection element (ICP) that is electrically connected to the connector. The ICP's to measure are IC101, IC102, IC201, IC202 and IC301. Additionally, as shown in the image demonstrating shorting pins on CN4, some power supplies will already have an additional ICP-N50 element added on the bottom, denoated as "IC204." Ensure that BOTH legs of all these ICP's are within tolerance of the nominal voltage levels (+/-5-5.3V for the +/- 5V rails, +/- 13.5-14.5 for the +/- 14V rails).

When finished, remember to remove the jumpers/solder bridges and ensure that the connector pin solder joints are adequate.