Service manuals, schematics, eproms for electrical technicians

ELTRA AIR PRINCE-946 1954 SCH

AUDIO - SERVICE MANUAL
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SERVICE MANUAL
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    ELTRA AIR PRINCE-946 PRINCE946 1954 PRINCE 946
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
May be useful - Harman Kardon information
For your information to repair Harman KArdon HD710 Player uses a KSS210B Pickup (as spare, original unknown) can be changed without any other servicing Harman Kardon Receivers; Series AVR 2000,3000... "Looses memory issue"- gold cap at the front pcb defective. May be changed to a 1µ cap but you have to solder 3 other elko´s to the other side. Keeps memory for a longer time. "Hum noise for the first 5min, warm up" - right lower side at the main pcb: elko 7800µ dead- you can see it at the "cap of it". Replace both (7800µ and 2200µ) to new versions above 25V. "Fuse burnt voltage selection; no green led´s flash, no sound"- cap 2200µ make a short circuit (next to 7800µ). Change these elkos! If you want to make it better... change the 7x 10µ caps for the regulators too. Resolder all points there. "volume changes self to max. or min." change the two resistors at the front pcb close to the volume encounter. be sure that there are both sides 5V! "everything is functional but no sound; but sound from the 6.1ch in" TC9273N-07 is dead (shorted). Have a look at the two caps and the security resistors beneath this chip! My be dead too. Replace this chip only by the -007 version. others will not function. Be careful with the bigger stripe cable! the contact lines are loosen from the plastics. You can help yourself with a "second glue" under these contacts. So i hope i can help you... cheers SG.
Mechanikus jeladót tisztítás után mivel lehet kenni?
Sziasztok! Egy erősítőben ki kellett tisztítani a mech. jeladót. Mivel lehetne kenni, ami nem bántja a bakelit és műanyag részeket? Van itthon Kontakt PR, ami potenciométerek tisztításához való, de biztosít némi kenést is. Az jó lehet? Vagy műszerolaj? Abból valami spéci kell?
üdv, István
uher végfok
Egy MA200SM UHER erőművet javítok (2x200W). A gond az, hogy többször cseréltek már benne végfok ic-t STK4050V mégis néhány nap után minden komolyabb meghajtás nélkül elszáll. Ez a végfokic +-90V-ot bír el és most +-82V-ot kap. Rajz szerint +-78V kéne legyen a táp, de a gépet 220V-ra méretezték. Most ugye 230V van és ez az emelkedés okozza a tápfesz ekkora emelkedését. Véleményetek szerint lehet ez a gond?
Fisher CA-225
Sziasztok!Fisher CA-225 erösítőnek kellene a kapcsolási rajza mert hiányosan kaptam.Előre is köszönöm,ha valaki tudna segíteni.
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