Service manuals, schematics, eproms for electrical technicians

AMPLIF 2A3

AUDIO - SERVICE MANUAL
Type: (ZIP)
Size
1.8 MB
Page
---
Category
AUDIO
SERVICE MANUAL
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    AMPLIF 2A3
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Relevant AUDIO forum topics:
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
 
AKAI TP-750 Tuner/Pre amplifier ERROR hibaüzenet
Sziasztok!
Belefutottam egy MX750-es mini hifi 3 egységébe. A tápegység és erősítő modul (PA-950) működik, tápfeszek megvannak, a végfokozat mindkét oldala hanggenerátorról meghajtva megy.
Ha összedugom a Tuner egységgel, a végfok bemenet - valószínű némítás miatt - már közvetlenül nem vezérelhető és a Tuner modul bekapcsolás után pár mp.-re ERROR 00 hibaüzenetet ír ki.
A panelon a tápok megtalálhatóak, a proci kvarcok rezegnek, egyenfeszültségek a doksi alapján szúrópróba szerűen  az IC-ken megvannak, kijelző sötét, nyomógombok semmit nem változtatnak..
Az elérhető doksiban sajnos semmi segítség nincs, a szkennel rajzrészletekből megfejteni a működést lehetetlen.
Neten jóformán semmi további infót nem találok.
Érdemes vele küzdeni vagy kuka?
Ha a EA-750 Sound processor modult is összedugom a tuner egységgel, semmi változás, a kijelző itt is sötét.
Reset működik, de nem történik semmi.
Valaki küzdött ilyennel?
Minden javaslatot előre is köszönök.
További szép estét!
Sándor
 
Audio Amplifier BST XA-1000
Hi
I'm looking for a schematic diagram for this equipment:
Professional Power Amplifier XA-1000

The main fuse was blown and according the owner it blowns again after replacement.
He used a 40 amp fuse. The original fuse is not around anymore and there is nothing written outside on the label. So it's somewhat a lottery about the correct fuse rating.

Anyway, I would like to repair this equipment but without a diagram it would be a pain and nearly impossible.
Tryed to find a diagramwith Google search - negative. Also the manufacurer ist unknown this days.

Maybe a reader has more information aboutb this.

Thanks a lot
Redwood (74)

https://www.simplysoundandlighting.co.uk/bst-xa1000-1000w-power-amplifier


 
PA Amplifier TA-403E nem erosit,torzitja a hangot
szervusztok
kertek ennek az erositonek a javitasara,nem erosit,alig van hang,azis torzit
eleg regi az erosito,viszont kivalo allapotban van
amit ellenoriztem,a tap 35 v,a kimeno fokozatban a tranzisztorok jok,a meghajto tranzisztorok is jok,az eloerositovel folytatnam
kapcsolasi rajzot nem talaltam...talan itt,a tanyan...volna tipp
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