Service manuals, schematics, eproms for electrical technicians

SONY CFS-W402

AUDIO - SERVICE MANUAL
Type: (PDF)
Size
3.1 MB
Page
29
Category
AUDIO
SERVICE MANUAL
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  • Also known:
    SONY CFSW-402 CFSW402 CFSW 402 CFS W402 CFS-W402
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
Sony MHC-V11 alaplap(UC2) keresek megvételre
Sziasztok,

Egy elhalálozott (több IC rövidzáras lett) alaplap helyett keresek egy jót a Sony MHC-V11 erősítős hangládához.
Gyártó szám: 988522300 vagy 988520889
Fut még ilyen néven: 40bhx2241-maf2g

Köszönöm, 
István 
 
Sony STR-DB940 tuner
Sziasztok. Van nállam javításon egy Sony STR-DB940. Elég sok baja volt de szereztem hozzá doksit így sikerült megjavítani rajta szinte mindent. A problémám a tuner részével van. Arrol nincs semmi rajz. Így emlitik TM301. Ha valakinek volna erről rajza megköszönném.
SONY TA-535 vlgfok SI-1340H melegedéskor bezajosodik

Sziasztok!

Az erősítőbe felcseréltem a végfokokat, a hiba átment a másik oldalra. A hibridet kibontottam, mikroszkóp és röntgen alatt sem látszik rajta semmi. Gondolom valamelyik félvezető.

Van valakinek egy ilyen modulja a fiók mélyén? Esetleg valami +/-40V-os tápfeszültségű végfokmodul, amit be lehetne tenni?

Üdv. Jácint

repair sony amplifier str-de254
Want to share: Have downloaded the schematics from this forum to help repair the amplifier of a friend. Turned out that Sony decided to route the earth through the chassis, even the earth between the various supplies. When one takes the main board out of the chassis and switches the amp on, there are up to 20 volts difference between the eart (and hence reference) of the pre-amps and the main amps. Luckily the amp goes into protection but from a design point of view it is not nice to rely on screws and aluminum face plates to conduct up to 0.2 amps of current from one supply to another. What I did is solder wires to every eart point and connected them on the main board to make it stand alone and not rely on conducting current through the chassis anymore. Bad design, simple repair but took some digging in the schematics to find out what exactly was going on!
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