Aaaah .. my apology 🙏🙏 .... those smd ones instead and yes, I am using 25v ones since same size and my stock ones did not read 16v like yours as well as not knowing better and guessing but now more resilent albeit already newer gya hybrid polymer and not stock nichicon uud polymer type as well as in fact 35v version being the lowest rating ? 😅😅 Cheers.
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Oh yes, I was more so referring to this.
It says the front panel capacitors being 47uF 25v and I knew I put in 16v so I had to run downstairs and check my pulls to make sure I didn’t make a mistake lol.
Edit: oops, didn’t scroll down far enough and see your next post.
Dan
I’m curious Richloh, did your tech make any adjustments after the work was done? I’m guessing I don’t need to make any adjustments, I have about 3 mV of offset on each channel and the amp idles warm, but not that warm and again, after cranking it for awhile it wasn’t alarmingly warm. My OCD would like to take care of it though.
Dan
Dan
Hi Dan, I asked and he said he did not ... his measurement did not indicated any need to do so while I did not verified what he measured or saw them myself to share and I left it as that.
I had the same query on biasing adjustment and asked Martin below who mentioned that his refurbishment also did not resulted in rebIasing need:
https://mapoulin.wixsite.com/audiobymartin/audio-upgrade
I would also certainly wish to know how I can recheck biasing and had only read of the procedure for kav-300i with different ICs.
I also made some query to Mike below who asked me to contact him directly but I disgressed and did not do so:
https://liquidaudio.com.au/krell-kav-300i-integrated-amplifier-repair-restoration/
Cheers.
Richard
I had the same query on biasing adjustment and asked Martin below who mentioned that his refurbishment also did not resulted in rebIasing need:
https://mapoulin.wixsite.com/audiobymartin/audio-upgrade
I would also certainly wish to know how I can recheck biasing and had only read of the procedure for kav-300i with different ICs.
I also made some query to Mike below who asked me to contact him directly but I disgressed and did not do so:
https://liquidaudio.com.au/krell-kav-300i-integrated-amplifier-repair-restoration/
Cheers.
Richard
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OK, then I will just leave it at that. Guessing it does not need adjustments then. I still am interested in knowing what transistors people had swapped out. Squeezing any more performance out of this amp would be fun.
Dan
Dan
Before and after resistors change to fine tune brightness modded blue leds and display to stock power led .. sunglasses on ebay sales 🙂
just picked up a nice example of the 400xi. As with all amps I buy I like to check the bias & DCO, so I looked into the 300i series bias procedure in this thread when it became apparent its not applicable to the 400xi.. as voltages at the bias test points don't make sense, they were all way way low, like 2mV when it should be 12mV.
A few notes. I didn't use a Variac, just wall outlet of 240v (Australia). I've not performed repairs so don't see the need for a variac. I also didn't feed the 400xi a balanced signal. Are these 2 items absolutely mandatory? To me it seems odd a signal is applied in the 300i procedure. All other amps I've biased you don't want a input signal
Generally you want zero voltage at inputs when biasing
Does anyone have the correct bias and DCO set procedure for the 400xi please?
Thanks
A few notes. I didn't use a Variac, just wall outlet of 240v (Australia). I've not performed repairs so don't see the need for a variac. I also didn't feed the 400xi a balanced signal. Are these 2 items absolutely mandatory? To me it seems odd a signal is applied in the 300i procedure. All other amps I've biased you don't want a input signal
Generally you want zero voltage at inputs when biasingDoes anyone have the correct bias and DCO set procedure for the 400xi please?
Thanks
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Hi Allan, indeed I also wish to know the same but failed to google find any info and previous Krell's support email address to check and got response on fuse info now returned error 🥺🥺
Hi Allan, just contacted Liquid Audio and received their quick response that they do not offer paid consultation/advisory on this biasing/dco info and will have to find alternatives ... strangely my email to Krell Service support now works or at least did not receive error message and hope they will advise such instruction .. fingercrossed. Cheers.
The SMD electrolytic capacitors are very bad quality beter to replace them asap otherwise you PCA copper and via's might suffer from the leaking fluid.