Kef PSW2000 Sub schematic required - Page 5 - diyAudio
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Old 5th July 2009, 10:44 AM   #41
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Default kef psw2000 schematic

i have a kef psw2000 that has stopped producing any sound.
i see from the posts that this is common & would appreciate a schematic .
i also intend to follow the mods suggested in post 15(roar malmin)
& would welcome any other suggestions or tips.
thanks malcolm.
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Old 23rd July 2009, 07:58 PM   #42
Bartje is offline Bartje  Netherlands
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Default KEF PSW2010 service manual

I'm having the rattling relay for 2nd time now. 1st time sub was sent to KEF/UK, took more than 6 weeks. I like to repair it myself this time.
Could anybody send me the service manaul with schematics to me please? I searched everywhere, this seems the only location to get it .............

I'm a new user, thanks in advance!! :-)
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Old 26th July 2009, 10:58 AM   #43
superR is offline superR  Netherlands
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Location: Rotterdam
5th hit on google shows a download on HiFi engine
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Old 28th July 2009, 12:13 AM   #44
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Default thanks for the kef. sub. schematic

i would like to thank SuperR for his info on downloading a schematic for the kef sub. i now have a printed copy to try & help me to effect repairs.
i would also like to thank the those running the forum & express how pleased i am that i have received such useful info on my first query.
malcolm 2413
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Old 28th October 2009, 09:31 AM   #45
Gisli is offline Gisli  Iceland
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Hi I have the same problem with my Kef sub as everyone else. I have a psw 2010 has anyone got a schematic for that or would the psw2000 schematic be helpful anyway?
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Old 27th November 2009, 02:53 PM   #46
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Quote:
Originally Posted by Roar Malmin View Post
Hi,
I will try to address most of the problems with this unit. As you know, the amp is located inside a plastic box. The temp has been measured to be over 80C. The standby on/off function works only on the speaker relay, the amp is always powered, hence the amp is always cooking and shortening the life of the components. Replace C59,60 with same rating. Relocate R 143,144 with the aid of flying leads. Increase wattage from 2W to 5W on R148,149 and R141,142 to lower resistor surface temp. Q18, 19 are to be replaced by BD139,140, and attached to the main heat sink. Drill holes and use screws. Remember mica. C42,43, replace with PP caps. Relay are to be replaced with Omron G5LE1-24, rated at 85C. Replace C54,55 with same type, only 105C. Same goes for C52.
Any questions? Just ask.

Regards
Roar
Hello,

Are you sure about this part numbers? Not for PSW2000 for sure...

I have a PSW2000 that is making loud low frequency random noises in standby with no input.
Any advice on what causes it ?

This seems to be the second common problem after the relay clicking problem that i had also and was fixed under warranty years ago.
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Old 29th November 2009, 08:22 AM   #47
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Fixed my PSW 2000...

Replaced All electrolytic capacitors (waiting for the 12000uF).
Replaced 2k2ohm 2W resitors with 5W and leaved the wires long.
Replace and relocated R143 R144 to 9W and fixed them to the main aluminnium block with termal coumpound.
Added heat sinc to Q11 Q13, BD140, BD139 respectively.

Put some silicone to glue resistors to the board because the pcb is very fragile due to been cooking and copper as came detached from it.


Now im thinkink in buying a small -15-0-15V transformer, a rectifier and a relay so i can shutdown the main ampifier via the AF/IN line (auto feature). So i got a true standby.
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Old 28th December 2009, 09:14 AM   #48
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Cool scematics for the kef

hello

I would like the scematics for the kef PSW 2000.
please send to michiel.rebecca@gmail.com

thanks
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Old 28th January 2010, 11:23 PM   #49
samolet is offline samolet  Belarus
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check e-mail
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Old 25th February 2010, 02:21 PM   #50
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Hello,
Would appreciate if I can have a copy of PSW2000 schematic to yangmanyuen@gmail.com
Thanks
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