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Schematic for Parasound Zamp ver 1
Schematic for Parasound Zamp ver 1
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Old 24th October 2012, 03:52 AM   #1
Mayank is offline Mayank  United States
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Default Schematic for Parasound Zamp ver 1

Hi. Does anyone have a copy of the schematic for the Parasound Zamp version 1 handy?

Thanks in advance
Mayank

Last edited by Mayank; 24th October 2012 at 09:51 AM.
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Old 29th September 2014, 11:45 AM   #2
camusmuse is offline camusmuse  United States
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Holy old post, but I came across this and I am also searching for schematics. Did you ever get ahold of a copy? If so would you be willing to share? Any version would be helpful, all would be great.
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Old 11th April 2018, 11:11 PM   #3
AlexRivera is offline AlexRivera
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Yeah, and here I am 3.5 years later looking for the same, did anybody ever find one?
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Old 12th April 2018, 12:17 PM   #4
delange is offline delange  Belgium
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Hifi Engine has v3 schematics: Parasound Zamp - Manual - Zone Amplifier - HiFi Engine
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Old 12th April 2018, 12:37 PM   #5
AlexRivera is offline AlexRivera
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Yes, that I have, unfortunately is not the same.
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Old 12th April 2018, 12:42 PM   #6
bullittstang is online now bullittstang  United States
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I'm currently working on one of these. All i can find is the Ver.3 schematic too.

What's wrong with yours? Curious if it's the same issue "constant relay clicking" - due to DC on the output (right channel)?

I have replaced the outputs (not exactly the same transistors but should be close enough) fixed one channel, but the issue persists on the right channel.
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Old 12th April 2018, 12:51 PM   #7
AlexRivera is offline AlexRivera
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Mine is worse than that, the first thing I noticed is that there was no fuse installed in it but the fuse holder had signs of melting so I decided to install a bigger fuse than the recommended one and I noticed smoke coming from the outputs even with the switch turned OFF, any ideas what could be causing this behavior?

Wondering if the Bridge rectifier or the voltage regulator are bad...
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Old 12th April 2018, 01:17 PM   #8
bullittstang is online now bullittstang  United States
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I would check all diodes, something must be shorted to let the current through.

It's may also have a relay that has shorted the contacts together, because it should be open until the voltage regulator circuit and DC offset are at a point to allow it to close.

Yes - yours is worse than mine. Any pics? Mine is super clean (no visible burns, marks or over-voltage conditions) just has a bad component that I'm having trouble finding.
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Old 12th April 2018, 01:33 PM   #9
AlexRivera is offline AlexRivera
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Mine is flawless, looks like brand spanking new in and out!

There's only signs of over heating on the plug/fuse holder, the voltage regulator and the big pink resistors by the outputs on the right channel but nothing is really burned.
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Old 12th April 2018, 01:49 PM   #10
bullittstang is online now bullittstang  United States
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Here is a pic of the bottom of mine - curious if yours has these 2 wires and small resistor. Mine looks like a DIY add, so I have taken them all out (didn't help or change my issue)

I had one leg of the "shorted" channels big pink resistor that was un-soldered from the board. Not sure if it was heat or poor soldering, no marks on the board and the solder was fractured, not melted.

The bad output was on the left channel as was this resistor. When I changed everything the left channel is OK (not perfect) but the right channel now has full voltage on the outputs.
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