Mesa Boogie DC-3

[unparalleled]

I have a LV power supply problem with this amp which is preventing the transistor stages in the EQ from working.
The PCB looks the same as a Rocket 44 but the LV PS circuit layout bears no resemblance to the DC-3 schem I have, or a Rocket 44 schem.

I have to repeatedly dismantle the amp to lift the PCB and then reassemble to test.

This amp has two 15v zeners in the PS.
The DC-3 schem I have shows a different set up with one 12v zener.

A PCB layout would be very welcome as would a schematic which actually matches the amp.
The CB is labelled: 1993 Mesa DC 23C.

[Enzo]

The amp design then is 17 years old. Try contacting Mesa directly, tell them which one you have and ask for it.

[ne0]

Here!

[Mark Black]

Check this one out - it's for the DC-2 but has a dual-zener low-voltage supply so might do as a guide. This schematic lists the zeners as 12V, but the voltage points infer they are actually 15V.

http://www.schematicheaven.com/boogi...aliber_dc2.pdf

[unparalleled]

Check this one out - it's for the DC-2 but has a dual-zener low-voltage supply so might do as a guide. This schematic lists the zeners as 12V, but the voltage points infer they are actually 15V.

http://www.schematicheaven.com/boogi...aliber_dc2.pdf

Yeeha! that's the one, matches the amp's wiring.
Many thanks!

[unparalleled]

Here!

Thanks for that, but that's one I already have and circuit is different.

Grab the Schem Mark Black has posted it matches this DC-3.

Cheers.

[moxy]

Try the studio caliber dc-2 here
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