Service manuals, schematics, eproms for electrical technicians


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YAMAHA RX-A820 service manual (1st page)
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YAMAHA RX-A820 service manual (2nd page)
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  • Also known:
    YAMAHA RXA-820 RXA820 RXA 820 RX A820 RX-A820
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
Yamaha RX V750 Házimozi végfok zárlat.
Sziasztok! Nem szoktam erősítőket javítani,de ez egy haver gépe. A baloldali front végfok ment zárlatba.Minden tranyó beszerezhető jó áron,de a 2sa 1770-et aranyáron mérik siniék.Ha valaki tudna normális pénzért nagyon megköszönném.
Yamaha RX-V459 nem kapcsol be
Tipikus yamaha hibával indult a dolog, c3015 (22nf) kondi csere és már működik is.
De ez csak 1 napig tartott, másnap ismét nem indul.Újból szétszedve az r3034 ellenállás kiégve, a c3015 jó.
Ellenállás cserélve megfelő értékre, de semmi.Ezután cseréltem még c3016 (50v 1uf) és az ic302 (tc4013bp), de ezek után sem ad élet jelet.
Esetleg valaki megtudná mondani hogy mi mehet még tönre ezekben a tápokban?
Yamaha CDX-590 laser adjustments?
I have a Yamaha CDX-590 CD player and it skips on some CDs - original CDs, these CDs play without problems on my other CD players. I have changed the laser unit (KSS-210A) but this didn't solve the problem. When I turn the player upside down, it plays the problematic CDs without a problem. That's why I think the laser needs adjustment. I have only a service manual for the CDX-493/593 but they should be very similar to the CDX-590. It seems that the adjustments are done via "test mode" of the CDX-590, unfortunately there is not much information, how to exactly, in the service manual. Here is a picture of the PCB. Here are the "test mode" sections of the service manual. In "test mode" I have tried Auto adjustment mode 1, 2, 3, but I don't know if it should work fully automatic without any intervention or when the mode is fineshed and I can proceed to the next one. So I activated mode 1, waited a while, activated mode 2, waited a while, activated mode 3, then exited test mode. It didn't help. Mode 1 - only a short blink of two horizontal dashes on the display and thats it Mode 2 - started "play" without sound from a strange time 99:00 (the test CD is not so long), after a while it skips to another time, "plays" a while, then skips back and "plays" and so on, I left it about an hour and it was still going on Mode 3 - seems to be very short as mode 1 I think I'm missing something ... Maybe someone did this or even serviced Yamahas in an official service and can provide information how to adjust the laser? Or maybe the problem is not the laser?
Yamaha R-300
Sziasztok! Ez a receiver egy kissé megfogott.A végfok Ic (STK 2030) cseréje után is a teljes tápfesz. a hangszórókimeneteken.Kettő ellenállás elégve, ezeket természetesen cseréltem.Esetleg a új SINI-től vásárolt végfok IC rossz?A hozzászólásokat köszönettel veszem.Rajzom nincs hozzá, ez is bonyolítja a helyzetet. Tónió
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