LaserActive:CLD-A100 Power Supply Testing

Exercise extreme caution while working with the power supply in this mode. Hazards up to 180V are possible!

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, NOT the spindle motor connector, CN2), which will allow the AC-DC converter circuitry on the primary side to operate. This will allow the "EVER +5V" rail to activate. A jumper may be used, or simply solder bridge the two pins on the bottom of the board.

• 

  Using a jumper wire to short CN002

Next, short pins 5 and 6 of CN4 together either via solder bridge, or use a cut component leg to place in the connector socket itself. This ties the "EVER +5V" voltage rail to the "POWER ON" signal line, allowing the power supply to bring up the "SW" +5V, -5V, +14V and - 14V rails.

• 

  Using a solder bridge to short pins 5-6 on CN4

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.