Keyboard Shortcuts
ctrl + shift + ? :
Show all keyboard shortcuts
ctrl + g :
Navigate to a group
ctrl + shift + f :
Find
ctrl + / :
Quick actions
esc to dismiss
Likes
Search
Re: TX802 troubleshooting
|
Agree 100%. My 2kc worth: Not all caps do the same function, have the same tolerances, or in some cases are even the right parts for the design. Example: previous generation Apple Time Capsules of which I've repaired many... the PSU dies because the 2 output caps they used were not up to spec for the temps they experience, which means they die within 2-3 years. Most of the caps I've had to replace were in PSUs. But not always. In old analogue gear (such as my 30 year old monitor for my Atari ST) I decided to totally recap it, because a) a lot of the timings rely on caps being within spec which affect the stability and picture quality and b) if a cap goes in the flyback circuit, your flyback transformer usually explodes, which means an expensive part if you can find one or the monitor goes in the trash if not. I've also had to replace all the surface mount caps on an Amiga 600, they were only about 20 years old at the time (which is quite young in cap terms that have had an easy life), and they were leaking acid which started eating away at the tracks on the PCB. I caught it just in time. Those caps have nothing to do with the PSU, but are in the video and audio circuits. Anyway tl;dr, if you wanna replace all the caps and are happy paying the money and time cost, go ahead, but if you want to be a bit more efficient - a good visual inspection combined with some experience, and maybe also a capacitance/ESR meter for when you're not sure. Jan. On Sunday, 5 February 2023, 12:02:48 GMT, PeWe <ha-pewe@...> wrote: I don?t like the sound of a JP-8000 at all,- with or without bad caps. To each his own. When it is your hobby collecting gear and doin? repairs,- perfect. When you made a livin? w/ music,- which requires almost perfect working gear all day,- you and your techs think different. You do what?s necessary, not more,- just because it saves time and money. And,- the most of malfunctioning gear on the used market comes from amateurs treating their gear like s##t. And a cap isn?t a cap, isn?t ... there are different ones and some have never to be replaced because they never dry out. The Oberheim Xpander is a good example for ! There were long discussions about when Yahoo Xpantastic existed and Oberheim expert Karl Schmeer (R.I.P) explained and helped. "reliability" ... A piece of gear is reliable as long as it works and BECOMES unreliable when it doesn?t work. When a repair job bring it back to life, that?s good. You might replace ALL the caps and then other parts fail ... Is that more reliable ? A recap doesn?t prevent from parts failure 100% ,- only a few. Am 05.02.2023 um 12:33 schrieb José Juan: If you have to replace a bad cap on a PCB...., what makes you think that the other ones, with same age and build quality, are in perfect working condition? In my experience, replacing all capacitors, beyond the psu ones, makes a night and day difference not only to my ears, you get a trustable working machine with glorious sound for years to come. It's about the sound, in the end, and reliability. This is my way, and not necessarily the way for everybody. As example, JP-8000 may put some light. Peace José Juan? El dom, 5 feb 2023, 12:02, Martin Tarenskeen <m.tarenskeen@...> escribió: On Feb 4, 2023, at 5:31, José Juan wrote: |
to navigate to use esc to dismiss