lundi 2 mars 2015

DBX 900a power supply issue no low 24v

Ok,

I'm bringing a DBX 900A rack unit back online. I have two of them, one is solid and working great, the other seems to have low 24v.



The power supply is supposed to give reg +/-15v & unreg +/-24v. The +/-24v seems to be around +/-16v and the +/-15v is around 14v.



DBX has a schemo posted online, but its fuzzy as heck and not much good, so I'm just kinda poking around.



It doesn't seem like much going on, a LM317 VR and TIP120/125 3055 type of setup.





DBX 900a power supply issue no low 24v

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