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TELAVOX STORSTATIONSMODTAGER-2J35 1934 SCH

AUDIO - SERVICE MANUAL
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SERVICE MANUAL
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    TELAVOX 1934 35 2J35
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Relevant AUDIO forum topics:
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Sziasztok! Javítok egy Technics SA-290 rádió-erősítőt. A végfok IC – SVI 3001 – egyik kimenetén (13 láb) mínusz táp van. Az IC beszerzési ára elég borsos. Mit javasoltok, mivel lehetne helyettesíteni? Néztem már különböző megoldásokat, de örülnék minden ötletnek. Üdv.: Kumi
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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

 

 

 

Samsung HT-WS1 Crystal Surround Air Track + Wireless Subwoofer PS-WWS1
Sziasztok.

Van egy ilyen Samsung HT-WS1 Crystal Surround Air Track  Soundbar-om amihez van gyárilag egy Wireless Subwoofer PS-WWS1 is ami vezeték nélkül kapcsolódik a Soundbar-hoz.
Az a problémám, hogy amit találtam manual-t hozzá, abban pont erről nem esik semmilyen említés. A problémám az, hogy a Subwoofer, egyik napról a másikra egyzser csak elnémúlt.
Ez annyit takar, hogy nem néma, hanem olyan halkan szól, hogy csak kézzel érezhető hogy van hang, azaz mozog a hangszóró, közelebb hajolva hallani is, de élvezhetetlenül halk.
Amit találtam a PCM azonosítója:  Samsung AH94-02239B PC Board-Amp, Ht-Ws1

Képek (netről) a PCB_ről:

Wifi panel:

Ezen kívül semmit nem találtam róla.
Esetleg valaki nem javított ilyet vagy nem tudjam merre induljak el, mindihol neten annyit írtak, hogy szervízbe vigyem be, vagy cseréljem az erősítő PCB-t egyben:(, ami nem egy gazdaságos megoldás..

Köszönöm szépen előre is.
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