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REMA ALLEGRETTO RADIO 1956 SCH

AUDIO - SERVICE MANUAL
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AUDIO
SERVICE MANUAL
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    REMA ALLEGRETTO RADIO 1956
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Relevant AUDIO forum topics:
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

 

 

 

Mission 700, CT130, CF130/78
Mission 700-as dobozba eredeti basszus hangszórót keresek. Nem tudom eldönteni, hogy a CT130-as, vagy CF130/78-as közül melyik a megfelelő (TVM-ekkel ARN 150-65/8 kaptam őket és eredetire szeretném cserélni). A neten nem találtam a paramétereiket. Az ebayen CT130-asokat találtam és ellenőrizni szeretném, hogy megfelelő típus-e. Ha valaki tudna segíteni örülnék neki.
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Sony FH-B490 CD rész nem működik(megoldva)
üdv: a CD része no disc-et mutat. A motor és lézer meg sem moccan. A tálca működik. A spindle motor 3V -ról szépen pörög, szán is normálisan megy 3V-ról, tálca szintén . Kapcsolók jók. Összedugva nem tudok semmit mérni, nagyon rövidek a vezetékek. +5V és +7V elmegy az egység felé. A tanyán levő rajzból hiányzik a CD egység rajza A robbantott ábrán CDM 28-58D10D van írva, a panelen HCMK-P3X, az IC-k BA6297AFP és CXD 2515AQ. Ráadásul KSS240 optikával. Valakinek ötlete vagy a hiányzó rajza lenne? Bálint
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