I know this is maybe a fluke, because they don't have vents for expanding like the wet caps do, but I've a psb with a polymer that definitely looks like it's top is domed up a bit, on a tv that doesn't reach 5v standby. It goes up to 1.8. I'm wondering can I replace this polymer with a regular electrolytic, and if so, should the uf or voltage be a different amount? I would have included a pic, but I couldn't get the "bulge" to show up with my camera, sorry.
-
-
Re: Questionable polymer on my Sharp LC-42SB48UT
short answer Yes, same uf but with 10% more voltage than polymer.
either its hardly to say from the top look of polymer. as all had curve top . best way took out and check. -
Re: Questionable polymer on my Sharp LC-42SB48UT
Try it and see...
--Either work--Or not....
Poly caps dont tend to fail as regularly as std caps so would doubt thats the issue.TELEFIX
How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
http://www.irf.com/technical-info/appnotes/an-1088.pdf
PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!Comment
-
Re: Questionable polymer on my Sharp LC-42SB48UT
Is it more probable that the psb's filter cap might be going bad? I don't have an esr to test, but thought about replacing it after trying the polymer.Comment
-
Re: Questionable polymer on my Sharp LC-42SB48UT
Doubt it, more likely stdby reg is working in burst-mode for some unknown reason, maybe leaky diode on its o/p or short on that rail in m.b. or no f/b loop due to dodgy opto or the controller chip itself.TELEFIX
How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
http://www.irf.com/technical-info/appnotes/an-1088.pdf
PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!Comment
-
Re: Questionable polymer on my Sharp LC-42SB48UT
not 10%, you need the cap to be rated for atleast 150% of the voltage it will see.
a lot of people do stupid things with cap voltage ratings, you can get in big trouble if you dont know what is actually going to hit the pins.Comment
-
Comment
-
Re: Questionable polymer on my Sharp LC-42SB48UT
well, the poly caps installed now days are all had 100% more as real current ,poly cap ex 12V line had 25 VC , do you really think how much more ..they will let them more life.. no.. they may fail to produce the real currents at once. 10% more mean as this example 12V line instead 25V cap enough whole life 35V cap.. sorry for any bad feeling you got.Comment
-
Re: Questionable polymer on my Sharp LC-42SB48UT
35v on a 12v line is good, it will have a higher current capacity.Comment
-
Re: Questionable polymer on my Sharp LC-42SB48UT
o/p = output
m.b. = main board
f/b loop = feedback loop
opto = opto-isolator, usually part of a feedback loopComment
-
Re: Questionable polymer on my Sharp LC-42SB48UT
Awesome, thanks! Very helpful.
Comment
-
a few days ago I finally purchased mser-100 v2 and I tested its abillity of measuring ESR value.
I found that It shows pretty accurate ESR value for electrolytic capacitor,But When I measure polymer capacitor of dreamcast game console,I found that one third of polymer capacitor's ESR value is more than twice the value of ESR meter table.(for example, I measured one polymer capacitor of 6.3v 100uf, It showed ESR value of 7.68)
Although my dreamcast now turns 20 years old but it still works. I occasionally have played game with it.
Is this ESR value of polymer capacitor correct?... -
This thread is about trying to get an Universal Main Board to work with a Sharp TCON and panel.
I have a Sharp LC-46D85UN TV that has had a main board issue. Since this model is from 2009, I am not able to find an exact replacement of the main board. Instead, I decided to see if I can future proof this tv by getting a Universal Main Board (T53U21.2) from China to work with the Sharp TCON (CPWBX4291TPZA) and panel. The universal main board supports a 8 bit dual channel LVDS interface whereas the TCON requires a 10 bit dual channel LVDS input. I have modded the LVDS connector to match... -
I have a Sharp Aquos LC-80LE757U that randomly made a loud popping noise when when watching TV one day. We found that the fuse blew and the thermistor. We ended up replacing the entire power supply board and have also replaced the TCON board. Now as soon as I plug the TV in it lights up and has the Sharp logo flashing on and off of the screen. If I unplug the ribbon cable from the TCON board to the main board I get the 2 long 5 short error code. Any ideas on where to go from here? We've tried resetting it but nothing has worked. If we plug it in and let it cycle through the flashing of the Sharp... -
Hello, I'm new to this forum. I like to tinker with Sony electronics, I have been lucky trouble shooting sony stuff, But I can't find much info on this Sharp TV.
The problem; plug to power>white led power indicator light is on>it turns on to the red Sharp logo>
then the android logo is displayed, lit fine then the android logo brightness varies, then lit normal, then the tv restarts and does the same startup logos over and over for 5 times then it turns off and the power indicator light flashes the trouble code 3 long blinks plus 3 short blinks .
does... -
Hi folks!
I have a LC-80LE661U that had some interesting issues.
Initially, it would come on and show the sharp logo and would show normal static before shutting off.
I started troubleshooting by disconnecting the led lighting strips and turning it on. It would do the same thing - come on, show the sharp logo and shut off. After reading, it was suggested to replace the main board. That was replaced and the same symptoms resulted. After this and some reading, the parts cannon got loaded up. I replaced the power board, same issue. Replaced the Tcon board and now it...
Comment