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Sziasztok,

egy Onkyo minihifi (CR-185) áramtalanítás után mindig lenullázza az óráját, gondoltam kicserélem benne a szuperkondit.
Azonban semmi nem változott, ugyanúgy 0:00 fogad ha kihúzom és visszadugom.

Merre érdemes elindulnom a hibakereséssel? 

 

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
 

Sziasztok! Ennek a készüléknek a végfokában égtek el alkatrészek, melyek pontos értékeit igazából a doksiból lehetne kiolvasni, de amit a tanyán és egyéb helyeken találtam sajna a végfok eléggé sematikus és nincs részletesen kirajzolva.Ha valaki erről tudna használható rajzot küldeni előre is köszönöm. Üdv.: Laci

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?