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Hello everybody in Hungary,
I am looking for schematic diagram of portable player THOMSON TM9670.
When I connect an USB drive into the machine, the normal supply voltage 5.5V drops to approx. 2.0V in dependency of each usb drive. The player reports that no usb is connected.
I found out that power supply circuit comes from transistor D882L – from pin No.3 which is base pin. This doesn’t make any sense to me. I would expect it should be connected to collector or emitor pin. Therefore I need schematic diagram or service manual for this player.
Thank you in advance for any help.
Regards,
smith666

Sziasztok!
Most hozták azt az erősítőt, hogy nem lehet bekapcsolni. Szétszedés után a biztosítékok épek, ellenőrizve a transzformátor a kimenet jó, de a primer szakadt. Ez toroid trafó, és van-e benne hővédelem, de ki van öntve az alja? Ki javítja ezeket a trafókat az országban? Teszek fel képeket is!

Sziasztok szereztem egy nordmende pa980 as erősitőt csak sajnos hiányos és ezért kapcsolási rajz kelene nekem hozzá. Ha valakinek megvan tölcse már fel. Előre is köszi

Hi All,
Does anyone have any experience of working on this radio, its the small Grundig with a leather case designed by F.A. Porsche.
I have recently repaired one with corroded battery contacts which had obviously not worked for many years.
Its now working perfectly on FM, but MW and SW1 and SW2 have no reception, just noise.
If I leave the radio connected to a 5v power supply for many hours it does actually get some reception on AM, but its not consistent. I'm thinking the fault is somewhere in the 'front end', oscillator stage perhaps.
I have checked the AM coils and wave selector switch are OK and everything is visually in excellent condition. 
Reading various reviews on this radio confirms they were sold very cheaply in the USA and many customers have complained there is little or no sensitivity on AM, whilst others say it works perfectly. This makes me wonder if there is a common fault on these which someone may know, before I start with my test equipment to try to find the problem...

Any advice would be much appreciated!