Service manuals, schematics, eproms for electrical technicians


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If you get stuck in repairing a defective appliance download this repair information for help. See below.
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SONY HCD-GTX66 HCD-GTX77 VER.1.0 service manual (1st page)
Preview of SONY HCD-GTX66 HCD-GTX77 VER.1.0 [1st page]
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SONY HCD-GTX66 HCD-GTX77 VER.1.0 service manual (2nd page)
Preview of SONY HCD-GTX66 HCD-GTX77 VER.1.0 [2nd page]
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  • Please take a look at the below related repair forum topics. May be help you to repair.
If you are not familiar with electronics, do not attempt to repair!
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Relevant AUDIO forum topics:
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 CDP-X559ES expansion CD mechanism, CD door doesn't open anymore

Has anybody an idea how to remove the CD drive from the box?

I have the problem that the cd door hangs
Many thanks

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!
Sony tux-032 tuner alkatrész beazonosítás (részben megoldva)
Sziasztok! A fenti tunerben van egy 5 lábú fekete téglatest alakú alkatrész. Ez van ráírva: TOKO AR50Hx. Úgy tűnik, hogy belül kh-s, mert ha megnyomom torzít a rádió. Kérdésem, hogy mi lehet ez és mivel tudnám helyettesíteni? Gondolom valamilyen szűrő lehet, de milyen? Az IC-t sem sikerült beazonosítani, rajz alapján okosabb lennék, de mindenhol csak a blokkvázlata szerepel. Üdv.
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