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Hello, Last week I picked up a nice Kenwood KA-3500 40watt intergrated amplifier in pretty good shape. Upon using it a bit more, I noticed a bit of distortion at high volume, more so in the left channel. I checked the DC offset at the speaker terminals, and the L channel said 100 mV, while the R was 25 mV. I understand this isn't so good for the L channel at least, but unfortunately this amp doesn't have any DC offset adjustments. Am I right in saying that to fix this I'd have to replace the output transistors? -- On a related issue, in the service manual I found the section on BIAS adjustment, and I read online how it can affect the DC offset. So I hooked up my voltmeter to the test points, and I got 4 mV on the L, and 8 mV on the R. In the manual it says should be 40 mV.....(!). Is there something wrong here? I tried carefully adjusting them, but they only go to 30mV with the pots fully on, this doesn't seem right to me. -- I compromised at 20 mV BIAS for both channels, and now the DC offset is 50 mV for L, and 5 mV for R, which is better, less than half what they were. I'm wondering, will I damage anything doing this, should I put them back to where they were? -- The service manual is on site here. Let me know if you want me to upload an english copy of the Owner's Manual, it has a better schematic in it all on one page, easier to read. I've also included some pictures. They're not my actual unit, but mine is exactly the same, but less dusty. -- Thanks for reading this. Many thanks in advance, and have a peaceful Palm Sunday! :taps2: Bellarmine

sziasztok! yamaha r-700 rádioserösítő kapcsolási rajzára lenne szükségem vagy legalább a hangszínszabályzó ic számára,hmm valaki kiszedte! köszi

Tiszteletem!

A fenti készülékkel lenne egy kis gondom.
A probléma a következő: A" hangfal választó gomb  benyomva ,jól szól. Viszont ha B" is benyomom akkor csak sistereg mintha tunerre váltana át.Akár van rajta hangszóró akár nincs,a B csatornán. B" gombot kikapcsolom szól rendesen.
Mi okozhatja?
Köszönöm előre is a segítséget.

üdv:Boci

Sziasztok
Radionette Solist RNSHDIW15E DAB+/FM/Internet Radio
Nekem ez az elso ilyen amit latok, nagyon tetszik, tobbek kozott szines kijelzo, szep menuk, BT csatlakozas, internet radio, Spotify, stb.
A problema a kovetkezo:
A hangero szabalyozo gomb vegtelenul forgathato korbe, a forgatas iranya noveli vagy csokkenti a hangerot.
Ez a resze mukodik is szepen, a kijelzon valtozik a hangero erteke, de a hangerot nem szabalyozza.
A hangero neha valtozik... magatol. Nem tudom mi szerint, de nem fugg ossze a kiirt ertekkel, nemitva is pont ugyanugy szol mint maximalis hangeron.
Szerintem software baja van, menubol csinaltam egy gyari visszaallitast, de nem befolyasolt semmit.
Erre keresek otleteket.

Minden jot,
Janos