Service manuals, schematics, eproms for electrical technicians

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HARMAN KARDON ST-6 service manual (1st page)
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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.
Harman Kardon AVR 355 Nem kapcsol be,sötét a kijelző led sem világít
Sziastok, Harman Kardon AVR 355 nem kapcsol be,sötét a kijelző led sem világít viszont halk kattanás-l meghúz egy relé tápok rendben,púpos kondik nincsenek. "Az a helyzet az sajna mostanában nincs időm és lehetőségem a javításra ha lenne valaki aki Budapesti esetleg 13.ker és szomszédos kerületi és bevállalná a javítást persze nem ingyen írjon PÜ-t. Előre is köszi!"
Harman Kardon mas-100 erősítő rca bemenet átalakitása/MEGOLDVA/
Sziasztok! Vásároltam a címben szereplő erősitőt. Sajnos a torony másik eleme/vezérlő/ nincs meg hozzá. Erősítő bekapcsol, mind a kettő oldal tőkéletes. Viszont a bemenete TLC081 el van megoldva Kérdésem az, hogy sima rca be menetet hogyan lehetne kialakitani? Üdv:atis76
Harman/Kardon AVR65 RDS - Sudden Sound increase
Hello! Harman Kardon Receiver /amplifier AVR 65/RDS ! increases the Volume by it self some times (Suddenly) pse. advise .. Works Well otherwise! Best..Regards Rune..Sweden
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