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KENWOOD KR-2200 RECEIVER SCH

AUDIO - SERVICE MANUAL
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1
Category
AUDIO
SERVICE MANUAL
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  • Also known:
    KENWOOD KR-2200 KR2200 RECEIVER KR 2200
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Relevant AUDIO forum topics:
KENWOOD KA 1100D erősítő DC offset hiba
Üdvözletem mindenkinek, a fent említett erősítövel nem tudok düllőre jutni. Ugyanis, a jobb csatornán kb -8V fezsültség van a kimeneten, persze a védelem nem kapcsolja a relét (még jó), a bal csatorna OK. Első pillantásra nem nézett ki komplikált esetnek viszont most beletörtem a fogamat. A kimenőtranzistorokat lekapcsoltam mindkét csatornán és csak az A osztály működik. Letöltöttem a KENWOOD KA 1100SD SM-et, de sajnos a kapcsolási rajz nagy mértékben eltér a KA 1100D-töl, úgyhogy jóformán használhatatlan. A TA7030 feszűltségerősítő hibrid IC-ket felcsréltem, a hiba maradt ugyanazon a csatornán. A bemenőfokozatban a FET inegrált differenciálokat is felcseréltem, de semmire nem jutottam vele. Minden tranzistort kivizsgáltam komponent teszterrel és hajszálegyformák a grafikák mindkét csatornán. Mivel nem tudok tovább lépni kapcsolási rajz nélkűl, a WANTED-be tettem, ha valakinek az 1100D kapcsolási rajza megvan, legyen szíves, töltse fel. további sikeres munkát
Kenwood KX-7030 deck fl kijelző nem egyforma fényerővel világít.
Üdv mindenkinek. Adott a címben szereplő deck kijelzőjének szegmensei nem egyforma fényerővel világítanak.A kivezérlésjelző pálcikái jól a többi elem meg halványabban, tudnátok tippet adni mi lehet a baj. Előre is köszi.
Kenwood KA-3500 Integrated Amp BIAS Adjust
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
Kenwood kdc-m6021 tuner probléma.
Sziasztok. A fenti autórádióval van gondom. A hibajelenség: tuner üzemmódban nem szól a rádió( még zaj sincs), nem lehet hangolni, nem reagál a két hangoló gombra(<< >>). Próbáltam átállitani a menüben manual-ra, de akkor sem reagál a gombokra. A többi gomb(FM,AM, programgombok, stb...) tökéletesen müködik. Ha a menüből akarnám az automata hangolást elinditani, arra sem reagál. A két hangológomb egyéb üzemben tökéletesen teszi a dolgát. Nincs belepiszkálva, nem volt még megbontva sosem.. Mi lehet a gond??? Köszönöm.
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