Searching for Behringer Europort PPA500BT Schematic

[the3secondrule]

Hi all,

Have another behringer on the bench.

When powered up, front panel lights pulse.
When PSU/power amp board is disconnected from mixer/IO PCB, Voltages are pulsing.
No obvious damage on power amp PCB.

Wondering if anyone has a schematic. Have searched and nothings showing up.

Thanx,

J

[The Dude]

I don't have a schematic and good luck getting any help on Behringer products. When you see pulsing like that, it's often the SMPS starting up-sensing a short- shutting down- starting up- sensing a short, etc., etc. I would look for a short on the secondary of the supply. I often find shorted secondary rectifier diodes causing this symptom.

[sugeda]

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[the3secondrule]

..

many thanks!

[x-pro]

If there is no short circuit on the secondary supply, the power supply may well be faulty.
The start circuit works, but the self-supply does not. Check C17 C18 in the power supply.