Service manual

5. While slowly removing the user panel, disconnect the audio signal cable from

the input board on the user panel by disengaging the ribbon connector. Also

disconnect the AC input connector (4 wire green connector) on the AC mains

board.

6. Using a magnifying glass, inspect the solder joints of the audio input board for

broken solder joints. Inspect the locking connector, the XLR connectors and the

Input polarity switch.

If broken solder joints or burned resistors are found, the audio input board will

need to be replaced.

Note: Ground loops carrying high voltages can burn some resistors and traces in

the audio input board. To replace the board remove the screw on top of the

board and unlock the XLR connectors from their shells turning the small self -

locking pins on the center of the XLR counterclockwise. Or contact the Meyer

Sound Service Department for links to service videos for this product.

7. Replace the audio input board with a known good board (either new or from

another unit. One quick technique is to swap the complete user panel with a

known good working unit), power up the unit and test it again. If noise is still

present, remove the chassis cover from the amplifier and verify that the audio

ribbon cable on the control board is properly connected.

8. If all else fails, try replacing the control board. Replace the control board with a

known good control board (make sure it is the same model/type) and retry.

Refer to Meyer Sound Self Powered Series Procedure (# 17.033.042.01 for MP-2

and # 17.033.042.01 for MP-4) the procedure also applies to the HP amplifiers.

Or contact the Meyer Sound Service Department for links to service videos for

this product or further assistance.

9. If the unit still does not operate correctly please contact the Meyer Sound

Service Department service@meyersound.com

to open an RA (Return

Authorization) to send the unit in for service.

J. Unit’s output degrades when paired with other units:

1. Check the polarity switch setting against the other cabinets.

2. Make sure that all the audio signal cables are wired the same.

3. If the drivers have been changed recently, check the driver wiring for correct

polarity.

Note: All speakers shipped from Meyer Sound are acoustically tested for phase

accuracy.