Service manuals, schematics, eproms for electrical technicians
ZEHETNER B58 RUBIN BATTERY RECEIVER SCH
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(PDF)
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56.6 KB
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1
Category
AUDIO
SERVICE MANUAL
AUDIO
SERVICE MANUAL
If you get stuck in repairing a defective appliance download this repair information for help. See below.
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Good luck to the repair!
Please do not offer the downloaded file for sell only use it for personal usage!
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- Also known:
ZEHETNER B-58 BATTERY RECEIVER B58 RUBIN 58
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Relevant AUDIO forum topics:
Üdv!
Rajzot keresek a fenti erősitőhöz. A végfokban elégtek az alkatrészek.
Köszönöm!
sanyika45
Sziasztok. A fent nevezett kis erositovel kuzdok, a jobb oldali csatorna kb 1/4 hangerotol kezdve jol hallhatoan torzit. Az AN7062 bemenetein meg tiszta a szinuszjel, de a V. amp bemeneten - konkretan a Q402 kollektoran mar nem. A jelenseg egy kicsit osszetettebb, mert ha a "speaker A" gombal levalasztom a hangsugarzot, a szinuszjel kitisztul es amplitudoban is a bal csatornaeval megegyezo lesz. Visszakapcsolva a hangsugarzot, a jel 50 szazalekkal megno es a negativ felperiodusban valami torzulas jelenik meg. Tettem fel kepeket, remelem beszedesebbek, mint az en magyarazatom. 1. kep jobb csatorna terheles nelkul, 2. kep jobb csatorna terhelessel. Nem ertem hogyan van hatassal a hangsugarzok ki - be kapcsolasa erre a fokozatra es ilyen mertekben. Valami visszacsatolasos problemara gyanakszom, de nem tudom honnan ered. Kerlek segitsetek kibogozni. Udv.
Kovacs Arpad
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 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
Sziasztok!
Került hozzám egy ismeretlen előéletű Sony TA-F317R típusú erősítő "javításra" de úgy néz ki, hogy nem is volt neki semmi baja azt leszámítva, hogy hiányoznak róla a hangerő, mély, magas, balansz szabályzó gombok. Ez speciel így néz ki, de nem hiszem, hogy ezek a gombok nagyon típus specifikusak volnának, jól jönne, ha volna valakinek rávaló gombok.
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