Service manuals, schematics, eproms for electrical technicians

RUSSIAN REKORD-53 RADIO-GRAMO SCH

AUDIO - SERVICE MANUAL
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Category
AUDIO
SERVICE MANUAL
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Relevant AUDIO forum topics:
AKAI AA-1030 receiver hűtőbordáján lévő diódát keresem
Sziasztok! Javítanék egy AKAI AA-1030-as receiver-t. A végfok teljesen elszállt. Az már majdnem kész, de a hűtőbordán van "két" dióda: STV-4H saruba fogatva. Az egyiket jónak mérem, de a másik mindkét irányban szakadt. Mivel lehetne helyettesíteni ezt, mert az elvi rajzon csak sima diódának tüntették fel, de rákeresve más rajzokon pl az STV-4H 4db soros diódát takar, az STV-3H 3db soros diódát. Az sem tiszta számomra, hogy germánium vagy szilícium, mivel ez még a 80-as évek erősítője. "FONTOS! Olyan fórum téma nevet válassz, ami beszédes, minél pontosabban illeszkedik arra, amivel kapcsolatban írsz. Egy lehetséges jó elnevezés pl: ORION LCD PT26S chassis 17MB12-2, a tápja nem indul Az nem elég, hogy pl: "LG LCD-TV" vagy "HP laptop" és hasonlóak. Illetve érdektelen, nem releváns információt se tartalmazzon a cím! A helytelenül elnevezett topik felfüggesztésre, majd 48 óra után törlésre kerül! Felfüggesztett állapotban nem tudnak mások addig hozzászólni, amíg ki nem javítod a címet. A hibás cím utólagos javítása (48 órán belül) a "Szerkesztés" fülre kattintva végezhető el."
SOUNDWAVE A-1100R STK4142 II Pusztulása
Üdv mindenkinek fent jelzett erösitöben elhalálozott az STK4142 ezzel nem is volna gond viszont füsté vált benne az R912.R911.R905 keresgéltem rajzott hozzá sajnos eredménytelenül ha tudna valaki segíteni az ellenállások értékével hálásan meg köszönném üdv
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
Philips autórádió (CAR400)
Sziasztok! Egy Philips autórádió kód megfejtésében kérném a segítségeteket. Feltehetőleg CAR 400 de nem biztos. Egy PEUGEOT 306-ban van. Ez van ráírva: MODEL NO:22RC200/65 PROD NO:FD1001159300346 TOX772 029018 PHAPKF19300346 REF.PEUGEOT:96 392 193 8002 PHK9300346 Köszönöm.
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