@nutronic, how did you figure out that the CTL line needs to be pulled low to turn on the DCDC-converter? Is Q801 doing the pulling? I have been...
I thought something like this, thanks!
I agree with you. But: Julian discusses these figures on his blog, for instance for the PX50, and he agrees that they indicate a noticeably worse...
Thanks Rune. I am no audio engineer and don't have much of a clue of the technicalities, but it did more or less successfully produce a frequency...
If you ever find a solution to this, do let me know. So far, I have encountered this issue only with several F707, and it still has me stumped. I...
Has anyone ever done some serious testing of the sound quality of some high-end AIWA Walkmans (PL, PX range...) e.g. frequency range, and compared...
Since nobody seems to be interested in doing this, I decided to try it myself. Turns out that you can indeed easily rejuvenate lead-acid gumstick...
Doesn't' work for AIWAs. Those are irregular gumsticks with both poles on one side.
Does anyone know what would have been the original charging solution for Walkmans that used AIWA PB-4 rechargeable batteries (for instance in an...
Has anyone ever tried reviving an AIWA PB-3/4/5 lead-acid walkman battery using the "just add distilled water"-technique described in some YouTube...
Thanks for pointing out my mishap. I am aware of the PCB label for the LED, but simply mixed up two components. The issue has been resolved.
I am trying to identify a diode I found on the DC-DC converter flex PCB inside my WM F707 that I am trying to restore. Could anyone help me find...
I replaced it, but there was no change in behaviour, unfortunately, When I accidentally got the Walkman working one time, I noticed that the 3,5V...
Thanks, @Squiggly. I appreciate your support. Unfortunately, the matter is more complicated. :) The DDC FLEXIBLE BOARD is what's in the copper box...
I am restoring a Sony WM F707 walkman that has been dead on arrival. It does not react to any inputs, on-device or on the remote. I checked for...
As usual, many thanks @Valentin. Let's tackle the first problem first; it will take a while before I can check the voltages on the relevant ICs....
Thanks, @Romulo Lubachesky. I am 99% sure that the buttons are fine. As far as I can say, they do what they are supposed to do. I have turned my...
Many thanks, @Romulo Lubachesky, that was extremely helpful. I've now had time to repair the clutch. Sadly, while things seem to have improved,...
Thanks, @Romulo Lubachesky, you seem to have been right. This is what I found: [ATTACH] Is the idea here that you have: 1) lower, felted part...
Many thanks for the hint! I think I got what you did. Not sure if this will resolve my issue, but I'll give it a shot as soon as I find the time.
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