A little bit more information. This picture is the voltage at the motor when it is locked. Are these spikes normal operation? Could this be a...
Is it normal, even when in sync, to see impulses on Pin 9? Or should it be more like a constant value?
So, I have double checked the waveforms and on Pin9, I found it odd that I was seeing impulses even when in sync. When not locked, those impulses...
Thank you very much for your suggestion! I will be taking a closer look into it. If I have spare parts from a DD2 in very good condition, would...
Before doing more tests with different resistor values on the pull-up, I started checking the signals on all the pins and comparing them when it...
Fascinating! It is exactly the same issue I have. Could it be that someone plugged a higher voltage power supply? I know that normally the issue...
Yes, I meant 0.01V (10mV) - edited and fixed on my previous post. I have just replaced C616 with another 10nF 100V capacitor and it remains the...
Hi! Thank you very much for your recommendation! I will try to get some Brasso and test it Any recommendations regarding specific types of paint?...
Ok, so I just tested with batteries, measuring 2.68V under load and these were my findings: - when synced at 3KHz, I measured at the motor 1.69V...
Hi! So, armed with replacement parts I discovered that: - new motor, it runs smoother but I can see it shaking inside the cage; - exchanged the...
I recently acquired some parts from other Sony Walkmans: parts for DDs, ex88 and ex77, and 701C (unfortunately no good latch as well). So if...
Thank you Valentin for your help. I today received a package of Walkman DD parts that I bought from eBay, and I now have two motors (and other...
Hi, I did not have time to properly do the test suggested but I briefly tried to lock to 3khz using the external power supply connected to the...
Hi everyone, I have a Sony WM-701C in very good condition and the only issue is that the door latch tip is broken. If anyone in Europe has a...
Hi Valentin, thank you very much for your help! I have used a bench power supply and dialled to 1.5V - The actual value measured by an external...
Hi everyone, I am restoring a couple of Sony DD Walkmans: a DD33, a DD100 and a DC2 and all of them have some spots of superficial rust on the...
Hi everyone, Sorry for being away for such a long time, but unfortunately I had to deal with some prolonged health issues. The good news is that...
Hi Everyone, I have taken some measurements with batteries - IKEA LADDA 2450 - without cassette and PLL unbridged, and I read the following...
Hi everyone! Up until now, my journey of restoring my old Sony DD Walkmans have been more or less straightforward. However, I recently bought a...
Hi Everyone! Many greetings from Portugal! I am Jose, and I am looking forward to contribute to the Walkman community! I had my first Walkman in...
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