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Crown D75A issues


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#1 MLPAK

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Posted 21 October 2013 - 08:26 PM

One channel in the D75A has dropped substantially in output, this is used for powering monitors in one of our edit suites, we isolated it to channel 1 in the D75A. Where can we find a service manual or schematic?

#2 joust

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Posted 24 October 2013 - 10:37 AM

Ask me in PM for the schematics.

As a start, is the level control working well? Does the control attenuate the signal normally?
Did you get to swap the input IC100 (33079)? Did you verify signal at the output of U100A (Ch1)?
Did you pass sine? What was the shape of the signal at the output? Was it distorted or just very low?
How does the Ch1 react when non-loaded? Is the signal strong now? Is it still low or distorted?

Alain

#3 MLPAK

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Posted 24 October 2013 - 02:08 PM

I tried to send you a PM regarding schematics and the system says no PMs?