Service manuals, schematics, eproms for electrical technicians


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ONKYO TX-NR838 SM PARTS REV2 service manual (1st page)
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ONKYO TX-NR838 SM PARTS REV2 service manual (2nd page)
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  • Also known:
    ONKYO TXNR-838 REV-2 TXNR838 REV2 TXNR 838 REV TX NR838 TX-NR838
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  • See related repair forum topics below. May be help you to repair.
If you are not familiar with electronics, do not attempt to repair!
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Relevant AUDIO forum topics:
ONKYO TX-SR444 házimozi erosito hibakód
Sziasztok. Ismét egy erosito kérdéssel fordulok hozzátok. Az ONKYO bekapcsolás után tutatja hogy milyen a hang beállitás /Volume 14/ és utánna bejon ez a hibakód amit a képen is lehet látni. Tudnátok segiteni ilyenkor mi a teendo? Koszi a válaszokat.
Udv: Gyuri
Onkyo TX-7620 erősitő kijelzője össze vissza villog (MEGOLDVA!)
Fent nevezett végfoghoz keresek kapcsrajzot,eddig eredménytelenül,vagy útmutatást,hogy merre induljak,mit mérjek?
Ha tudna valaki segiteni,nagyon megköszönném.
Üdv! György1960
ha lehet akkor ide kérném,mert a régi telefonom még ennyire képes,amikor uton vagyok.
Onkyo TX-NR646 NG:LCRSLSRBLBR hiba javítása
Van egy Onkyo TX-NR646 házimozi. Bekapcsolás után ezt az üzenetet írja ki. NG:LCRSLSRBLBR. A reset nem segít. A végtranzisztorok mérve jók, feszültségek megvannak.
Van valakinek ötlete, hogyan tovább?

Előre is köszönöm.

Mindenkinek Boldog Újévet Kívánok!
ONKYO TX-DS494 low volume problem solving experience
Hello. here is a message to share my experience in solving a problem that appeared on the home-cinema amplifier ONKYO tx-DS494. In order to sell this amplifier I had to check if all the outputs and all the functions works properly. On the back of this amplifier you have to frontal output : A and B. I connect a pair of speaker on A output : no problem. I can adjust volume. when i connect the pair to the b output and turn the volume knob no sound came out of the speakers until I reach a level defined by I don't know what. :hmmm: My volume level goes from 0 to 80db ( if I remember well ). from 0 to 23 db no sound and when I reach 24 dn sound increase and stabilize. With hearphone connected, i don' have this problem so I conculde that amplifing transistor could not be incriminated. I checked on the service manual and saw that there are two or three component that could be the source of the problem : the main processor, some capacitors on the output PCB and relays. I began testing capacitors: no pb. then I thought that if cannot be the main proc because it ( I think ) works in a binary mode: it works or it doesn't. so I decided to switch between themselves the two relay and :super: : it works. The relays was in fault and did not switches properly. here is my experience in repairing an amplifier
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