The MZ-1 is a pretty complex device and while I'm not familiar with it I want to share some thoughts regarding your issues: 1. The reading...
Those without the SONY branding are most likely genuine chips. Never seen a fake one myself without a SONY logo. The older ones (late 80s) are...
First of all, you will need to break the circuit in order to measure the current, so the current is deviated through the meter. It is very...
For measuring current, you need to connect the positive lead of the meter to the A/mA socket and connect the meter in series with the walkman....
Capacitors won't manifest this symptom, I would not consider them as a potential culprit. While caps are a common problem on these, it is Nichicon...
The issues with Dolby C are caused by incorrect Dolby levels as you guessed yourself. There will be issues with Dolby B as well, but less obvious...
It's hard to say without a recording if the hum is wihtin normal limits or not. There are a couple of things that must be taken into account: -...
I assume the low pitch noise you are talking about is motor hum, but I am not completely sure. Does this noise sound like a buzz ? And does it...
I do read quite a lot myself and have to say that I am surprised how many people are in the subjectivist camp when it comes to audio. I don't...
Yes there are many myths that run rampant, one of them is old capacitors should always be replaced because they're dried out etc. That's something...
Unfortunately yahoo.jp is no longer available to EU and UK since April 6, 2022. And I have an impression that is the case with other Japanese...
This was already discussed on another thread, but I want to point out some facts: - those output capacitors operate at 1.35V in circuit (even...
You can find the current draw for specific models in their respective service manuals, it's written on the schematic near the DC in jack symbol....
In regard to the WM-20 you want, I can't give you an exact amount on how much you should pay on one (that's something only you know). Prices on...
Hello and welcome to the forum, @flyman ! I think it's best to create a separate thread on Tech Talk section in regard to your problem. But you...
Current draw should be 70mA (at 3V, although it won't change much with a lower voltage). A higher current does indicate the motor has increased...
The back EMF is conducted, meaning it's a singal that goes through the motor wires, not an RF singal (radiated). So flipping the PCB won't make...
I agree with @TooCooL4, the price now is whatever people are willing to pay (at least that's what it should be, practice is more complex). In...
I have seen this before in DDs, it's motor hum: it is caused by some unevenness in the motor rotation, which in turn is caused by intermittent...
@zahrah If I were you, I'd restore the unit and keep for personal use as you probably won't get much money on it. Cleaning and polishing the case...
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