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Russell H.
Russell H., Service Tech
Category: Electronic Musical Instruments
Satisfied Customers: 10770
Experience:  8+ years of professional experience
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This seemed to be the best place to ask the following

Customer Question

Hi,This seemed to be the best place to ask the following question. I am trying to repair a dbx 128 in which it seems the PS doesen't work. I've replaced the 732, lm301 and the NPN transistor, No change. AT 70VAC in (generally enough to have it function. I read about +10 and -.3 where it should be +12,-12VDC Respond and II'll atach a ckt diagram.
Submitted: 11 months ago.
Category: Electronic Musical Instruments
Expert:  Russell H. replied 11 months ago.

Hi, thank you for contacting My name is Russell. I will do my best to provide the right answer to your question.

Have you considered whether something in the DBX128 might be shorted out or drawing too much power? in which case, output voltages from the power supply would be loaded down severely or at least to some extent.

By all means attach a circuit diagram, and I'll take a look at it.