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legg <legg@nospam.magma.ca>: Sep 16 11:55AM -0400 >Is there some portion of the dying device that >can be identified as defective and possibly be >repaired, or is this thing toast?   I note that signal strength is reported low on the duff phone, before signal lost.   Is the antenna replaceable?   RL

"ctae...@gmail.com" <ctaestudo@gmail.com>: Sep 16 04:33AM -0700 Hello team, how are you? I need this a lot.   who can make available to me I have not found.   Thank you in advance.

JC <Chipbee40_SpamNo@yahoo.com>: Sep 16 09:29AM -0400 > I need this a lot.   > who can make available to me I have not found.   > Thank you in advance.   Schematic for OZ8283LN on this page:   https://www.dianyuan.com/article/35043.html

"ohg...@gmail.com" <ohger1s@gmail.com>: Sep 16 06:52AM -0700 On Wednesday, September 16, 2020 at 9:29:24 AM UTC-4, JC wrote:   > > Thank you in advance.   > Schematic for OZ8283LN on this page:   > https://www.dianyuan.com/article/35043.html   When scouring the web, I often find hard to find .pdfs and representative schematics on Russian sites. I put the page on Google Translate and go from there.

tabbypurr@gmail.com: Sep 15 11:38AM -0700 On Monday, 14 September 2020 01:22:16 UTC+1, Ralph Mowery wrote: > works and heat the capacitors with a hot air gun or even a hair dryer > and then try starting it. If it starts up faster the capacitors are a > sure bet.   Another other way to test them is to piggyback a new one on, see if it springs to life. Another way is to use a component tester.     NT

whit3rd <whit3rd@gmail.com>: Sep 15 01:08PM -0700 On Sunday, September 13, 2020 at 2:01:59 PM UTC-7, Peabody wrote:   > The third used to do that too, but now it won't whine at all. I've taken > it apart, and the main capacitor checks out good, as does the main power > switch.   As others have mentioned, that usually is an oscillator-startup problem, and the entire circuit is ONE feedback loop oscillator; every component is a suspect. With age, high voltage parts are most susceptible to failure; the HV rectifier and its associated switch (SCR or transistor) that drive the coil are inexpensive to replace (except you'll have to identify them, and match to modern available parts, and pay shipping for onesies...).

Fox's Mercantile <jdangus@att.net>: Sep 15 05:23PM -0500 > Another other way to test them is to piggyback a new one on, see if it springs to life. Another way is to use a component tester.   > NT   That ONLY works if they're open. You should know that.     -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com

"ohg...@gmail.com" <ohger1s@gmail.com>: Sep 15 12:30PM -0700 One of my customers dropped off this combo 5.1 amp and sub for work. I tried to discourage him but he insisted. I let it sit a week and just cracked it open a few minutes ago. I think it has a bad programmable micro AT89C2051, but when I searched on "Theater Innovations" and TI-5100 to see if parts were available, I came up with this as being one of those white van deals. Looking it over, it's honestly no worse than any other toilet one would buy at Walmart, and maybe even better than some. It has TO-3P Toshiba outputs for the sub and Thomson TO-220 for the balance of the speaker outputs. I don't know how many watts were claimed on the box, but the back of the amp says <900W, so they're not lying LOL. It does have a nice toroid transformer though..

Pimpom <nobody@nowhere.com>: Sep 16 02:14AM +0530 > One of my customers dropped off this combo 5.1 amp and sub for work. I tried to discourage him but he insisted. I let it sit a week and just cracked it open a few minutes ago. I think it has a bad programmable micro AT89C2051, but when I searched on "Theater Innovations" and TI-5100 to see if parts were available, I came up with this as being one of those white van deals. Looking it over, it's honestly no worse than any other toilet one would buy at Walmart, and maybe even better than some. It has TO-3P Toshiba outputs for the sub and Thomson TO-220 for the balance of the speaker outputs. I don't know how many watts were claimed on the box, but the back of the amp says <900W, so they're not lying LOL. It does have a nice toroid transformer though..   I have a Chinese 2.1 that I bought for the equivalent of ~US$20 about 15 years ago. The claimed output is 1480W!! I traced the circuit quite some time ago and estimated the actual power at roughly 5W + 2.5Wx2, maybe less.   The sound is quite good though - for that price. Not hi-fi of course, but it sounds better than all other models I've listened to in the same price range. Better, in fact, than many others costing twice or more. It has a smooth rich bass, not boomy, and clear mids and highs.

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