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GELOSO 2617 RF UNIT SCH

AUDIO - SERVICE MANUAL
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Category
AUDIO
SERVICE MANUAL
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Relevant AUDIO forum topics:
SKODA SYMPHONY nem indul - MEGOLDODOTT!
Sziasztok! Egy Skoda Symphony tipusu autoradiot hoztak javitani. Sajnos, semmilyen eletjel nem lathato a keszuleken. A bekapcsolo/hangero gombja szet van hullva, pontosabban kukas, de ettol fuggetlenul tovabbra sem kapcsol be, nem vilagit rajta semmi sem. Kerdeznem, hogy ennek a radionak auto nelkul is kellene valamit tevekenykednie, vagy teljesen "nema" az asztalon probalva? Koszi! Udv! Imre
BEAG APT 100
Szép napot Uraim! Van ebből az erősítőből nekem pár darab. Egyelőre javítás alatt. Az lenne a tiszteletteljes kérésem, hogy segítsetek ezen készülék szintillesztésének megoldásában a jelenleg használatos bemeneti szintekhez! Ja, meg a rajz BDY73-at ír, de beépítve 2N3055 van benne, miért? Tibor
Teufel US 4110/6 SW Erősítő nem működik
Üdv Tisztelt Mesterek !

Teufel rendszert vett a tulaj az Ebay-on , új ként , de minden eleme hibás volt.
Fő , hátsó és Subwoofer is. Mire hozzá került lejárt a visszaküldési idő.
A 6 csatornából , csak a Subwoofert használná , többit külön erősítővel.
TDA8954TH  hajtja szubot , illetve hajtaná.
Eredeti hiba , hogy pattogott a Subwoofwr halkan.
Végfok csere után hónapokig működött , majd megállt.
Táp is megállt , megjavítva , már van (+), (-) 24V., de néma.
Találtam zárlatos müv erősítőket , zárlatosak , szívták az 5V konverter IC-t.
 Gond az hogy nincs rajz és minden agyig be van öntve szilikonnal.
Felszedhetetlen , vagy sérülnek az SMD alkatrészek.
Igy arra gondoltam , hogy felhasználva a már jó tápot , veszek bele az Ebay ról egy mono 350-400W modult a Subwoofernek.
A többit úgysem használja.
De nem IC-s , hanem Fett , vagy Tranzisztorosra gondoltam.
Mi a vélemény ?
ION Archive LP Turntable

This is a compact design to I guess transfer the vinyl into MP3 format.
Complaint was when the arm was moved the tt dont spin, confirmed that as
theres a leaf switch to sense arm movement,
and its fed to a main pcb with all the IC's that I guess handle all the
stuff. The switch is ok, and I remember seeing 14V or so on the motor pins
frm the PCB, so I figured perhaps theres anough current to spin the motor and
focused on testing the motor.

Manufacturer does not supply the mainboard that feeds the motor but
the motor can be taken apart and after I opened it and
disconnected the small pcb fron the motor terminals and apply power
directly, it spins w 12v. theres a small electrolytic cap on the pcb 25V / 22uF and an
AN6652 4 pin T0-220 type case IC that I guess is some kind of speed control
circuitry.

The drive Motor is an EG-530-SD-3F, main board is stamped K-13007.
Gonna check the cap, but after searching this IC and its
applications with the motor, I see its popular and some drawings show how its used to regulate the 78,33
and 45 rpm speeds.

This drawing looks pretty much what I see in there:
https://tectronelectronics.eu/images/thumbnails/465/465/detailed/31/eg530.jpg
 

I have replaced the IC and the cap, but the motor still does not turn. The main pcb

is proprietary and cant be purchased, and I think it is giving the op-amp IC a reference signal.

Is there a way to bypass that signal or fool the IC to believing its on to test it out?

Photo showing the motor pcb :
http://www.mediafire.com/view/s79blgku1503mtg/HPIM0643.JPG/file
Photo of motor under test:

http://www.mediafire.com/view/thhgvcwac8al7gu/HPIM0635.jpg/file

 

 

 

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