Service manual

Remove the audio signal cable from the audio input board by disengaging the

locking connector.

Also remove the AC harness from the AC mains board (4 wire green

connector).

11. Remove the sense cable (gray ribbon cable) and the transformer primary

connector (7 wire green connector) from the AC mains board.

12. While firmly holding the AC mains board, remove the three (3) screws on the

top of the chassis and remove the entire AC Mains module.

13. Replace the AC Mains module with a known good module (either new or

from another unit).

Make sure to reconnect the sense cable and the transformer primary connector.

Replace the user panel and repeat the power up sequence as stated in step 8.

14. If the three conditions stated in step 8 are met this time, the power supply

circuits are functioning properly.

It is most likely that the AC Mains Board is damaged and will need to be

replaced.

You can refer to Meyer Sound Self Powered Series MP-2/4 AC

Mains Service Procedure (#17.033.022.01) for replacement procedures for the

AC Mains board or contact the Meyer Sound Service Department for links to

service videos for this product.

15. If the unit still does not power up properly, it is likely that the power supply

module is damaged.

You can refer to Meyer Sound Self Powered Series MP-2/4 Power Supply

Service Procedure (#17.033.076.01) for replacement procedures for the Power

Supply board or contact the Meyer Sound Service Department for links to service

videos for this product.

B. Circuit breakers trip on power up or during use –

4 Channel versions

1. Do not reset the circuit breakers.

If the circuit breakers are reset without first determining the cause of the

excessive current, further damage to the electronics may result.

Caution: If the breakers pop out and are pushed back in and power is re-

applied, without first verifying the fault in the amp, the thermistor (black circular

component glued to relay 1) on the AC Mains board could be damaged. Visually

inspect the thermistor for damage and replace the AC Mains as needed.”