Service manual

cabinet slowly, taking care to unplug the green speaker connector(s) on the top

side of the amplifier.

2. With the amplifier sitting on a firm surface, remove the eight (8) small head

screws from the user panel.

3. While slowly removing the user panel, disconnect the AC input connector (4

wire green connector) on the AC mains board. Check the audio ribbon cable

connection on the audio input board. If the connection is loose, reconnect the

audio ribbon cable firmly. Reconnect the AC input connector, reattach the user

panel to the unit, and repeat the power up sequence. If the Active LED still does

not light proceed to step 4.

4. Remove the amplifier chassis cover and verify that the audio ribbon cable

connection on the control board is connected properly.

5. Replace the user panel and retry. If the unit still does not pass signal, the

control board could be damaged.

6. Replace the control board with a known good control board (make sure it is the

same type) and retry.

Refer to Meyer Sound Self Powered Series TruPower Limiting Upgrade

Procedure (# 17.033.042.01 for MP/HP-2 and # 17.033.042.01 for MP/HP-4) or

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

product or further assistance.

Note: If the unit comes on and the audio signal passes, but the LED does not

light, the audio input board probably has a bad LED and the input module needs

to be replaced.

7. 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.

G. Unit turns on and off in a cyclical fashion:

1. Check the AC line for fluctuation or sag under load. This can be best achieved

by using a "Y" connector on your power cable. Connect one side of the "Y" to the

amplifier and the other side of the "Y" to a voltmeter. Monitor the voltage as the

unit turns on and during use.

2. If the line voltage is stable, try replacing the AC Mains board with a known

good one.

Refer to Meyer Sound Self Powered Series MP-2/4 AC Mains Service Procedure