HELP!!!, KRELL KSA-100S Service Manual wanted!!!!

fepablo · 14th August 2007, 07:26 AM

Hi, i from Argentina. I need the service manual of Krell KSA-100S power amplifier. Please, if somebody have this, send to my email federicopablorodriguez@gmail.com

Thanks You.

Federico Rodriguez

greenspan · 16th February 2011, 07:49 PM

I found the KSA-100 stuff here.

josemria · 14th July 2011, 03:46 PM

Quote:

Originally Posted by greenspan

I found the KSA-100 stuff here.

Hi, I need other schematic: the Krell KSA300S schematic or manual service for repair one device. 12 volts pulses at right channel output during one minute. After that time the unit work very good.
Thanks.

rextech · 15th July 2011, 09:22 AM

Josemria
I too are trying to fix a KSA-300S, without any schematic.
The amp has suffered from bad capacitors, and as described from the owner, it just went dead, and released a little smoke from the back of the right hand amp.
Investigation showed that a leaking capacitor C24 had shorted to a track leading to Anode of D12.
Actually, electrolytic fluid had contaminated the surroundings of all the 4 caps C 21-24
After recaping, and completely cleaned the entire unit, it will now engage the mains relay, take in a lot of power, as the main caps charges, and then it only cliks a few times from the small relays (i think on the driver boards) and then goes dead.
I checked all the components around to be ok.
I would much appreciate to share experiance with you on this beast of an amplifier, and if you shoud succeed in getting the schematic, pls. let me kknow, and i will as well share with you, if a find a copy.

rextech · 20th July 2011, 10:11 PM

Josemria
I do not know how far you got with the KSA-300S. but i seruosly think you have the same leakin cap. problem as i have, recap the unit, and make sure that you clean ALL the residual electrolytic fluid that have escaped the capacitors, an i will expect you amp. to be fine again.
I located the error in my unit to be the twin FET transistor in the differential stage, at the input, i has an open drain in the feedback side (designation Q33), it has suffered from the conducting electrolytic fluid liying around on the pcb.
I have ordered one from littlediode, and expect it to arrive from US within next week, i will post the result here when i replaced it.
Did you ever find the schematic? (i spend quite some time reverse engineering this rather complex amp.)

Too much stuff · 4th August 2011, 11:21 AM

We should start a list of schematics required! . I'm looking for:

KMA 100 mk2
KSA 200S

Thanks.

maikl 5 · 9th October 2011, 12:42 PM

I need the service manual of Krell KSA-100S power amplifier. Please, if somebody have this, send to my email xcargo@mail.ru

14th August 2007, 07:26 AM	#1
fepablo diyAudio Member Join Date: Aug 2007	HELP!!!, KRELL KSA-100S Service Manual wanted!!!! Hi, i from Argentina. I need the service manual of Krell KSA-100S power amplifier. Please, if somebody have this, send to my email federicopablorodriguez@gmail.com Thanks You. Federico Rodriguez

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16th February 2011, 07:49 PM	#2
greenspan diyAudio Member Join Date: Dec 2009	I found the KSA-100 stuff here.

15th July 2011, 09:22 AM	#4
rextech diyAudio Member Join Date: Jul 2011	Josemria I too are trying to fix a KSA-300S, without any schematic. The amp has suffered from bad capacitors, and as described from the owner, it just went dead, and released a little smoke from the back of the right hand amp. Investigation showed that a leaking capacitor C24 had shorted to a track leading to Anode of D12. Actually, electrolytic fluid had contaminated the surroundings of all the 4 caps C 21-24 After recaping, and completely cleaned the entire unit, it will now engage the mains relay, take in a lot of power, as the main caps charges, and then it only cliks a few times from the small relays (i think on the driver boards) and then goes dead. I checked all the components around to be ok. I would much appreciate to share experiance with you on this beast of an amplifier, and if you shoud succeed in getting the schematic, pls. let me kknow, and i will as well share with you, if a find a copy.

20th July 2011, 10:11 PM	#5
rextech diyAudio Member Join Date: Jul 2011	Josemria I do not know how far you got with the KSA-300S. but i seruosly think you have the same leakin cap. problem as i have, recap the unit, and make sure that you clean ALL the residual electrolytic fluid that have escaped the capacitors, an i will expect you amp. to be fine again. I located the error in my unit to be the twin FET transistor in the differential stage, at the input, i has an open drain in the feedback side (designation Q33), it has suffered from the conducting electrolytic fluid liying around on the pcb. I have ordered one from littlediode, and expect it to arrive from US within next week, i will post the result here when i replaced it. Did you ever find the schematic? (i spend quite some time reverse engineering this rather complex amp.)

4th August 2011, 11:21 AM	#6
Too much stuff diyAudio Member Join Date: Mar 2011	We should start a list of schematics required! . I'm looking for: KMA 100 mk2 KSA 200S Thanks.

9th October 2011, 12:42 PM	#7
maikl 5 diyAudio Member Join Date: May 2011	I need the service manual of Krell KSA-100S power amplifier. Please, if somebody have this, send to my email xcargo@mail.ru

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