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Schematics for Krell KSA200S
Schematics for Krell KSA200S
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Old 1st October 2001, 12:24 PM   #1
Rainer Weber is offline Rainer Weber
diyAudio Member
Join Date: Aug 2001
Location: Germany
Hello everybody,
has someone the schematics of this Krell amp. (or similar)
Im interested who the different bias level is working in detail.
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Old 10th April 2011, 01:51 AM   #2
ricbed is offline ricbed  Costa Rica
diyAudio Member
Join Date: Apr 2011
Hi I am looking for the Krell Ksa200S schematics, I have a rare problem, driver transistors are hot very quickly and relays in both channels are sounding click and click.

Any help will be apreciate.

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Old 20th December 2011, 04:57 PM   #3
computerwala is offline computerwala  United States
diyAudio Member
Join Date: Oct 2008
Location: Chicago
Sounds like you have have a thermal overload / DC voltage on output issue. You need to check all the Power transistors and also reseat them on the Heat sink with new washers. The old washers become brittle after 20+ years of use. You can also measure the DC on the Output Relay to see if the clicking happens when the offset voltage reaches a certain limit.
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Old 20th December 2011, 05:13 PM   #4
AudioSan is offline AudioSan  Norway
diyAudio Member
Join Date: Feb 2009
i have the service manual with schematic for Ksa200B
send me PM with mail.

Last edited by AudioSan; 20th December 2011 at 05:19 PM.
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Old 21st December 2011, 05:58 AM   #5
Dr.H is offline Dr.H
diyAudio Member
Join Date: Apr 2002
the ksa200S and ksa200B are two very different amplifiers...
the s used sliding bias while the b was a simple class A design
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Old 17th December 2012, 09:11 PM   #6
CarCar is offline CarCar  Colombia
diyAudio Member
Join Date: Jul 2007
Hi ,Sorry my english, I Had krell amplifier, bias is very high, need schematics for fix it,
my Email is ccarrascal@hotmail.com
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