Hi, I recently had an amazing find - an absolutely mint, boxed Sony WM-EX50. I am 100% sure it never had batteries put into it, let alone a tape. Of course, the belt was shot, I got a new one. But the motor was a problem since the beginning. First it was making a really loud whining noise, I gave it a generous helping of oil and after running for a moment the noise subsided, but not fully. Now, today, I wanted to replace the belt, but the motor just turned for a moment and stopped. It's stone dead now. My question is: does anyone have an EX50 in bad condition for parts, but with a working motor? Perhaps the motor itself?
try to run the motor directly. Connect a 1.5V battery power to the motor wires. It doesnt make sense the way its motor stopped working. Most probably a wire got disconnected during testing/ lubrication. You can always find Sony walkman on ebay. This one has a working motor https://www.ebay.ca/itm/SONY-WM-EX5...637759?hash=item52278973bf:g:sLgAAOSwePpdyWii
Hi, I'm sorry for the late update but maybe it'll help others - the culprit were the capacitors. It seems like those SMD caps on EX series are garbage even if they never saw any use.
Can you please elaborate, it seems I have the same problem: http://stereo2go.com/forums/threads/wm-ex50-mising-motor-servo-caps.5207/ Are the caps C602, C603 present or missing on your EX50? Did you change all the electrolytic caps, including the two rectangular?
Hey HWTest, those capacitors are not present on the later versions of this model. Only low serial number units have them, and since lack of them doesn't affect operation, I don't think it matters if they are shot or not. I'm not the best at figuring out schematics, but only the two capacitors in plastic enclosures seem to be related to motor operation. I changed those and the motor started getting power again. Also, in my opinion, it's not viable to change the capacitors in this model - there is not enough room for even the smallest of electrolytics. Especially the 330uF ones. You should only attempt it if you can replace them with new SMD components.
Can you please show me which capacitors in plastic enclosures you mean, on the attached picture of the PCB? Thank you very much
