MACKIE DLM 12. TURN ON, DISPLAYS "VOLTAGE", AND THERE IS NO SOUND

They are available on the Mackie drivers site at https://supportloudtech.netx.net/loud-public/#/asset/9303
You can find everything you need to know about this beautiful beastie at https://supportloudtech.netx.net/loud-public/#/search/basic/vt12

take it to a Sound Production company and ask their opinion. If they use Mackie gear-even better. They will better be able to tell you what's goin' on if they hear the speaker. Good luck.

If you've changed the tweeter and the sound is still muffled the fault is with the HF amp, or the cross-over. You will have to send the amp assembly for repair as it is all surface mount components in there -nothing you will be able to fix yourself. Sorry for the bad news!

There is an entire crossover circuit inside that is BEFORE the amp section. There are 2 separate amps: one for HF and one for LF. Can you describe the noise you are hearing in more detail? Is hte sound effected by the gain controls at all? What happens without any input?

Thanks,
Dan

RCA jacks do NOT connect to the USB. One is aanalog audio, the other digital.

Refer to your EV user manual, page 23, part 2.

You run the outputs of the Mackie into the stereo "returns" on the EV.

Use TRS interconnect cables as these are balanced lines.

The schematics do not show the actual voltage.

From the design, the phantom power secpndary should be around 35 to 45 volts AC.

The 16 volt supplies would require a secondary winding that will be around 26 to 32 volts center tapped.

Transformers are quite reliable and unless a voltage is missing, the transformer is likely OK.

The most suspect items are the electrolytic filter caps if the voltage is not the design 16 plus and minus values.

Yes, send this to a Makie repair facility. Chaances are there is a chip going bad... most likely the A-D or D-a convertor.

Try putting this is your freezer and then immediately test it. This MIGHT indicate if problem is easily found with circuit cooler spray.

Use TRS to TRS balanced cables from the M Audio to the line in 11 and 12.

Set the pan controls for the 11 and 12 to opposite directions to split the stereo to left and right main outputs. (otherwise both main outs mix the left and right and you get mono result.

If you are looking for the service information for a Mackie 1202VLZ, contact Mackie. I believe that you can purchase it directly. They have contact information on-line.

Dan