Service manuals, schematics, eproms for electrical technicians

WESTERNELECTRIC WE-43A VINTAGE PHOTOELECTRIC CELL AMPLIFIER SCH

AUDIO - SERVICE MANUAL
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AUDIO
SERVICE MANUAL
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  • Also known:
    WE-43A VINTAGE CELL AMPLIFIER WE43A WE 43 43A
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
Sonos Play 1 hangfal javitasa
Sziasztok
Kerult hozzam egy Sonos Play 1 hangfal.
Szetszedve eleg ijeszto volt, viz folyt bele es ugy volt betaplalva halozati feszultseggel.
Ami biztos: a halozati biztositek (T2A) szakadt es felrobbant, azonkivul a Graetz hid ket diodaja zarlatos, az egyk AC bemenet a + al vezet rovidet, a masik a -al
Tekintve, hogy a viz vezetett, valoszinu egy ideig 230AC-t nyomott a kondira es a tapra.
A pufferkondi mintha kicsit pupos lenne, de nem biztos. 
Kiszaritottam, kicsereltem a nyilvanvaloan hibas alkatreszeket, meregettem benne, rovidzart vagy hibat keresve. Nem talaltam semmit, ezert betaplaltam.
A biztositekot rogton kivagta.
Ekkor megint a kondira iranyult a figyelmem, a chopper reszen nem lattam zarlatot.
A kondi 100uF/400V


Merve nekem nem tunik rossznak.
94.04uF
Vloss=1.9%
ESR=1.5Ohm


Keresgeljek tovabb? Nyilvan nincs itthon ilyen kondim, maskepp cserelnem.
DENON AVR-770SD táp hiba
Üdv mindenkinek ,fent jelzett erősítőt javítanám a tápjában elvolt égve pár alkatrész zömét sikerült cserélnem viszont a D911 dióda értékét nem tudom beazonosítani ha tudna valaki segíteni egy rajzzal vagy csak a dióda értékével hálásan meg köszönném üdv
Denon PMA500V amplifier
I have and found most of the voltages as indicated on the circuit diagram, till op amp M 5218P; are near those specifed. The output on the centre of the two power transistors of both the channels are also alright.

While looking at the voltages on test points as mentioned on the page 7 for setting up quiscent current, these cannot be set.

Bit of history,  the amplifier was lying unused for long time. Nothing in it has burnt. It was never opened earlier than this time, couple of days back.

While I was probing for voltages with DMM, with probe on collector of TR413 one of the fuses blew up. Later same thing happened on the other channel as well.

With the above as background can a Good Samaritan  figure out feasibility of repair.

i am unable to upload service manual as file size is 7.3 mb
Meazzi 777 torzít
Sziasztok Fórumtagok! esetleg kapcsolási rajza valakinek ehhez?
Én nem találtam a neten! Régi. Az van hogy torzít kicsit recsegve meg halk is!
A vég és meghajtó tranyók műszerrel mérve jónak tünnek. Talán valamelyik kondi lenne a hunyó? 
Rajz nélkül nehéz meg nehezen is szerelhető! Előre köszi a válaszokat! Sziasztok
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