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ONKYO TX-SR508

AUDIO - SERVICE MANUAL
Type: (PDF)
Size
9.5 MB
Page
113
Category
AUDIO
SERVICE MANUAL
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  • Also known:
    ONKYO TXSR-508 TXSR508 TXSR 508 TX SR508 TX-SR508
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Relevant AUDIO forum topics:
Onkyo DX-7333 CD player sometimes doesn't recognize CDs
I have a Onkyo DX-7333 CD player, which sometimes doesn't recognize CDs. I don't think it's a laser pickup (KSS-213C) problem, because when it recognizes the CD, it plays it without a problem, even very scratched ones. The next thing is, it should play CD-RWs, but it doesn't even recognize them. I think it needs adjustment There are two pots on the main PCB - Focus Gain R123 and Focus Offset R112. Also there are two test points: TP1 4 pins, first pair labelled Tracking Gain, second pair Focus Gain TP2 2 pins labelled RF Out and VC But in the service manual is no description, what should be measured on the test points and how to set Focus Gain and Focus Offset. In the attachment is a cut out from the schematic, where the test points and adjustment pots are. Please if someone knows, how to?
Onkyo TX-SR505e "battery-less memory backup" nem működik
Sziasztok,

Segítséget kénék, nem régen vettem egy Onkyo TX-SR505e házimozi erősítőt kb 12-13 éves. Ha kihúzom a konektorból gyakorlatilag azonnal elfelejt minden beállítást, rádió adókat stb. A használati utasításban benne van a "battery-less memory backup" funkció. Azonban sem a kapcsolási rajzon sem a gép peneljein nem találtam "szuper" kondenzátort. Ha valaki tudna segíteni legyen szíves vessen már  egy pillantást a kapcsolási rajzra, érdekelne melyik áramkör ezért a felelős, ha egyáltalán tényleg bele van építve ez a funkció. 

Köszönöm!
ONKYO A-8031 erősítő végfok elfüstölt (már működik)
Sziasztok! Nevezett erősítő egy ismerősömé, hibája hogy az egyik oldala elszállt. Mérve a két végtranzisztor zárlatos, Q521-2SC3854, Q523-2SA1490, és egy ellenállás R535-270ohm elégett. Az ellenállás két tranzisztor emittere között van, Q517-2SA965, Q519-2SC2235 között. Az ellenállást és a két tranzisztort Q517-Q519 cseréltem, végtranyók nélkül bekapcsolva az ellenállás egy pár másodperc múlva ismét elfüstöl.... Hibás alkatrészt idáig nem találtam, mit kellene ellenőriznem, cserélnem? Sajnos rajzot sem találtam. Képet próbáltam csatolni de már legalább 15perce csak tölti és semmi. A válaszokat köszönöm.
ONKYO amplifier dolby surround, Problem with a Switching Diode
Hi everyone

Could somebody tell me if I can replace a switching diode to another one, the one installed in the onkyo is a 1SS252 and is 10 times more expensive that a 1SS355.

Usually I order the same but they are pricey (around 10.00 usd for a 100) and not commonly used, not many sellers.
For the 1ss355 every seller on line has it in stock and it's around 1 to 2 usd for a 100.
Ans they are available locally, not in china waiting 5 weeks for the part.
Thank you.


1SS352
Characteristic Symbol Rating Unit
Maximum (peak) reverse voltage VRM 85 V
Reverse voltage VR 80 V
Maximum (peak) forward current IFM 200 mA
Average forward current IO 100 mA
Surge current (10ms) IFSM 1 A
Power dissipation P 200 (*) mW
Junction temperature Tj 125 °C
Storage temperature Tstg −55~125 °C

1SS355

Characteristic Symbol Rating Unit
Maximum (peak) reverse voltage VRM 90 V
Reverse voltage VR 80 V
Maximum (peak) forward current IFM 225 mA
Average forward current IO 100 mA
Surge current (1s) IFSM 500 mA
Junction temperature Tj 150 °C
Storage temperature Tstg −55~150 °C
 
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