Hi everyone, On to my next project. A Sony Walkman WM-D3 that I won in a local auction along with a D6C. Both in mint condition externally! Anyway starting with the D3 that has zero electrical function (with batteries) and a FF button that will not press down. The play, rewind, and stop buttons all seem to have normal travel and engagement. Decided to tackle the mechanical issue first. I Removed the covers and can see under the FF button is a stainless plate. The plate does not budge when press down on the button. The rewind button has clearance under it and so travels down freely. So my first of many questions with this repair/restoration is, is that stainless plate not supposed to be there normally, or is that plate supposed to be there but move down when FF button is pushed? This will be a longish journey as I both need to replace the cracked center gear as well as resolve the no power issue. Any advice or wisdom greatly appreciated! Mark
Hi everyone, So after reviewing Marians center gear repair instructions I see the plate I’m talking about IS the center gear assembly. I also found the video of Marian testing a prototype and I can clearly see the plate(s) move up and down with the FF and REW buttons. Looks like I’m in for full disassembly right out of the gate. Before I buy Marians center gear I guess now I need to determine why no motion of the motor. If it is the commonly failed servo control chip or whatever it is, I need to figure out if the D3 has one of the impossible to find ones. If it is, looks like I will be at a standstill. I can’t find any videos online of anyone replacing the center gear in a D3. Because of the record feature there must be some extra parts Does anyone know if the center gear from the D3 has a how to video for gear replacement? My components all look different from what I see in Marians instructions and other videos. As always, thank you in advance for any thoughts or advice. Mark
The servo IC was used in more Walkman units. I have logged these so far, there most like are more units that I did not look into yet on WML:
@Dauner There's nothing signficantly different on the WM-D3 as far as replacing the center gear. Only thing extra you need to remove in the REC lever, hence why I don't think a separate tutorial specifically for the D3 is needed. I suggest going through the tutorial a couple of times and understand all the steps before attempting to do the repair. You say you have no power to the motor, but does the unit works otherwise ? - battery check LEDs; - amplifier noise (hiss) in the headphones that varies with volume; In regard to the CX20084, check if you have 1.5V on pin 5.
Thanks Valentin, I will read the final version of the tutorial a couple of times again. I have the record levers removed (easy to do, and I have a lot of pictures), and so if have any questions I’ll post here. When I removed the lower arm I found a black plastic washer “floating” on a nearby component, but I believe it is part number 3-701-436-11 “WASHER, 1.6” item number 114 in the Service Manual. Sits on top of a spring. For power I was looking at things late last night and realized I have power with batteries installed but not with 3V jack. I both get increasingly louder hiss with volume pot as well as battery meter working with Play depressed. I’ll check voltage on the CX20084 pin 5. Thanks again, Mark
