Yes, check the IR LED with a camera (you need to see a purple light), if that's not emitting the mechanism will likely loop from that as well,...
I have a theory, but cannot confirm it because I don't have the service manual. Some of these walkmans use a resistor ladder to sample the...
I agree with your conclusion, it's likely the clutch in the reverse/REW table reel that does not have enough grip. That would also explain the low...
I have looked carefully at the videos provided, the only one that seems to point in some direction is the one in English. What has catched my...
@CDV A very comprehensive response ! In regard to WRMS/peak value, it's up to you to decide if the article should be updated or not. My position...
This is the auto-stop mechanism ? [ATTACH] It's interesting that the mech looks to be a more complex variant of the Tanashin-type mechanism....
These measurements seem to be off: takeup torque should be similar on both FWD and REV, and more likely closer to 30-40 g x cm. Back tension...
@CDV I have read again you article on Medium: it's great, probably the best wow&flutter reference to read out there. There is nothing wrong with...
@Stevedean The TC-153SD is very likely to be working if it's described as working. However, being a very old unit, expect it might need new belts...
I remember reading about this problem before, but no clear explanation was given on how to solve it. I recently repaired a D6C that was having...
What frequency does the noise has ? It's 50Hz mains hum or it is higher frequency ? Are you using the unit on batteries or on a mains power supply...
Does the buzzing noise pitch change if you put the unit in play and keep the takeup reel from rotating with your hand ?
@CDV Your measurements have confirmed what has been stated before by @Simon Green: the original belts that came with these walkmans were better...
You can download the service manual here: https://freeservicemanuals.info/en/servicemanuals/viewmanual/Panasonic/RQX11/
I think with most modern headphones and IEMs (which have a V-shape frequency response), you won't loose anything. Even with headphones with a more...
In the service manual, I can see a rotary switch that tells the microcontroller the position of the mechanism (FWD, REV, FF, REW). If that switch...
Given both were introduced in 1978, there is either no link between the two (the very similar mechanisms was a matter of convenience for Sony) or...
By looking at the ZX-7 pictures provided by @Silver965, I notice some aspects which could help establish what links are between this unit and...
There is another unit that can be included in gray (essential design elements taken from these units). A unit that I have completely disassembled...
I didn't even knew a WM-EX2 existed until now. Checked the service manual and it uses a different clutch system (2 gears in the center instead of...
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