Service manuals, schematics, eproms for electrical technicians

PHILCO 42-350 SCH

AUDIO - SERVICE MANUAL
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AUDIO
SERVICE MANUAL
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    PHILCO 42350 42 350 42-350
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Relevant AUDIO forum topics:
Accuphase P-400 Service manual-t keresek/Looking for Accuphase P-400 service manual
Sziasztok/Hello Everyone! Accuphse P-400-hoz keresek service manual-t, vagy egy jól kivehető kapcsolási rajzot. Amennyiben valakinek van ilyen azt nagyon szépen megköszönöm! I'm looking for a service manual for the legendary Accuphase P-400 or at least a good resolution readable schamatic. I'd be really greatful if someone could share one! Köszömöm! "Rajzot, service manualt, jobbra a "Keresem/WANTED" doboz "KATT IDE" gombján keresztül kérj!"
SONY TC-WR570 a szíjak méreteit keresem, Elvitték!
Sziasztok!
Most került hozzám ez a deck, hogy cseréljem az ékszíjakat rajta. A gondom az hogy egy darab sincs meg benne, ezért keresném hogy milyen méretű szíjak vannak benne, vagy beszerzési helyet keresnék!
Thomson TM9178 hordozható rádió-CD-magnó kijelzője halvány
üdv:kaptam egy ilyen készüléket, a kijelző halovány, egyébkén minden funfció működik. Hasonló rajzon TM 9138) a kijelző minden feszültséget egy processzorról kap, el kellene dönteni, érdemes- e foglalkozni vele, vagy kuka a kijelző. Nagyon nehéz szétszedni, minden panel csatlakozása forrasztva van. ragaccsal lekenve. Csak fizetős rajzot(11 USD)találtam, annyit ér az egész. Javított mostanában ilyet valaki? Bálint
Klipsch ProMedia 2.1 Amplified speakers


Original problem is no sub woofer output. Been through this one and recapped it and the common 2 burned 1K (R16/17)
resistors are replaced but the sub is still not responding. Volume control potentiometer is a common issue on these but
the L-R spkrs sound good.

Went by this webpage on the repair:
https://christopherbradshaw.net/The_Project_Bin/klipsch%20promedia%20subwoofer%20repair%20-%20page%201.html

On the schematic there is a sub-relay (sw101) powered by +V_HF line it
maybe is suppose to be +V_LF ? Without the relay coming on looks like the sub is disconnected.
The zeners (D03/04) that give +/- Vcc to the op amps seemed way off so I replaced them and the voltages seem much closer.

Theres also a sub-mute line on p104 to p101. Power supply shows the LF mute relay and interconnect diagram says it
gets fed from the LF amp. What is triggering the mute? I dont see a mute button anyplace.

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