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-   -   sure electronics 2x100W blown?? (http://www.diyaudio.com/forums/class-d/231206-sure-electronics-2x100w-blown.html)

tigox 2nd March 2013 09:57 PM

sure electronics 2x100W blown??
 
Hey i bought this board a year or something ago, and today i was testing in in my new project when it stopped working.....
The led still lights up, there is no music or what so ever coming out of the output, and nothing seems blown on the board...
So any ideas at all :S '?[IMG]http://i50.tinypic.com/14lsw7p.jpg[/IMG]

http://i48.tinypic.com/zu3wcw.jpg

http://i45.tinypic.com/xeo8r5.jpg

http://i45.tinypic.com/xeo8r5.jpg

http://i45.tinypic.com/202rme.jpg

i really hope someone can help me :( i love this little board and it left a void in my home audio...
thank you so much for any help possible

tigox 2nd March 2013 10:06 PM

forgot to mention i was only using a channel and now the're both not working so maybe it's the tc2000 chip? it's outputing to both tk2050 right?

JonSnell Electronic 2nd March 2013 10:18 PM

Have you a schematic?

tigox 2nd March 2013 11:04 PM

i can only find the ver. 1.0 that is a slightly older board but no significant diference i think : http://www.sure-electronics.net/down..._Ver1.0_EN.pdf

PeterLukacs 15th March 2013 02:10 PM

Schematic of 2x100W sure electronics board
 
1 Attachment(s)
I am attaching the schematics of the amp board you are having trouble with, hope this helps. Have you already checked the power supply voltage? Under 10V, and over 30V the unit shuts down.

Saturnus 15th March 2013 02:52 PM

Many people have blown up their Sure "2x100W" by using them with car audio head units or other high signal voltage signal which will burn of the input in the TC2000 chip. Perhaps this is the problem.

PeterLukacs 19th March 2013 05:18 PM

I have been reading the TC2000 documentation carefully and now I have another clue for you. The sure electronics amp has a resistor of 10kOhm labelled R20 in the mute path. The tripath doc says: " When the device is in mute, the pin must be “pulled low” via approximately 1kohm to overcome the internal latch and change the TC2000 state (i.e. out of mute). When the device is not in mute, the mute pin must be “pulled high” via approximately 2kohm to overcome the internal latch and change the TK2050 state (i.e. into mute). ", so the people designing the amp in Hongkong were again missing some english or math lessons, because 10 kOhm >> 1kOhm! This way, if the amp enters mute mode on this board, maybe it will never be able to leave this mode, unless the R20 is replaced by a resistor with 1kOhm value.

tigox 10th May 2013 06:26 PM

thank you all so much, i'm sorry but i only saw your replies today :S, ok then i will try those options :)

tigox 10th May 2013 06:31 PM

Quote:

Originally Posted by PeterLukacs (Post 3417941)
I have been reading the TC2000 documentation carefully and now I have another clue for you. The sure electronics amp has a resistor of 10kOhm labelled R20 in the mute path. The tripath doc says: " When the device is in mute, the pin must be “pulled low” via approximately 1kohm to overcome the internal latch and change the TC2000 state (i.e. out of mute). When the device is not in mute, the mute pin must be “pulled high” via approximately 2kohm to overcome the internal latch and change the TK2050 state (i.e. into mute). ", so the people designing the amp in Hongkong were again missing some english or math lessons, because 10 kOhm >> 1kOhm! This way, if the amp enters mute mode on this board, maybe it will never be able to leave this mode, unless the R20 is replaced by a resistor with 1kOhm value.


Thank you , i will take a look at that resistor ^^


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