Translate this page:

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

Magnófej beállításához keresek 4 sávos mérőszalagot. Megfelelne egy bizisten jól beállított (stúdió)magnóval házilag készített szalag is. köszi előre is

Sziasztok. Adott egy Grundig v303 erősítőm. 2db STK4036X található benne. Már nem gyártják nem tudom beszerezni. Építeni szeretnék a 2db STK helyére 1-1 panelt. Milyen kapcsolás lenne ide megfelelő? Csatoltam képet az erősítőről. Előre is köszönöm. Üdv: Csady

Szép napot mindenkinek ! Egy gyári Wolswagen hangfal, /aktiv/ bekötésére lenne szükségem. Ez van rajta, WW ISOPHON 867 035 403 . Úgy kaptam , elég izmos cuccnak néz ki ,szétszedni sem lehet, csak ha roncsolom . Infót nem igen találtam róla, egy kis HELP jól jönne ! Előre is köszönöm .