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TDA 2050 SIGNAL INPUT SECURITY
http://diyaudioprojects.com/Forum/viewtopic.php?f=10&t=6061
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Author:  rahulrahullll [ 18 Oct 2017, 16:20 ]
Post subject:  TDA 2050 SIGNAL INPUT SECURITY

------------i made the tda 2050 amplifier played for 30 min-in-low volume----suddenly volume became very

high crackling noise comes out along with song---so switched it off---then checked transformer and tda

2050 ic attached to a big heatsink--slighty warm---then checked power supply everything ok---

then again tried to play song----no sound --but speaker vibrating tremendously as it would burst out

making a booming sound----checked amplifier with another speaker same thing----


------MAIN ISSUE-------------

---i was using mobile phone and pc 3.5 mm jack output (inbuilt realtek soundcard in motherboard) as

signal source----after amplifier went wrong---

i used stereo headphones to check signal output of mobile and pc-----sound was coming out-------

---------BUT ONLY MUSIC AND HIGH FREQUENCY sound coming--VOICES IN THE SONG ARE ALMOST GONE JUST ECHOING

SLIGHTLY------------SO THE AMPLIFIER DAMAGED MY PC AND MOBILE PHONE 3.5 MM SOUND OUTPUT-------

----- :confused: :confused: :confused: :confused: :confused: --------------------MY QUERY IS------- :confused: :confused: :confused: :confused: :confused: :confused: ----------

1----------IS THERE ANYTHING LIKE SIGNAL INPUT SECURITY IN TDA 2050 AMPLIFIER WHICH IN FUTURE WOULD KEEP

MY SIGNAL SOURCE DEVICES PROTECTED IN FUTURE ?

2----------MY BEST GUESS IS AMPLIFIER FAILED AND SEND POWER DIRECTLY TO SPEAKER AND SOURCE SIGNAL

DEVICES AS PC AND MOBILE so they are damaged------CAN ANYBODY TELL ME WHAT EXACTLY HAPPENED ?




------------------DETAILS OF TDA 2050 BUILD---------------




i made dual rail tda 2050 circuit---according to this----


http://diyaudioprojects.com/Chip/DIY-TD ... Amplifier/

pcb diagram----http://diyaudioprojects.com/Chip/DIY-TDA2050-Hi-Fi-Chip-Amplifier/TDA2050-ChipAmp-PCB-

Component-Layout.pdf

parts list----http://diyaudioprojects.com/Chip/DIY-TDA2050-Hi-Fi-Chip-Amplifier/Updated-List-of-

Components-for-PCB.pdf

---------power supply--transformer dual rail---16-0-16 v ac------

22.5-0-22.5 v dc after bridge rectification 10 a and filter capacitor 2200 uf 50 v--------

power circuit looks similiar to this type-values are different--i have used--bridge rectification 10 a-

filter capacitor 2200 uf 50 v

https://cdn.instructables.com/FH7/T1DU/ ... MEDIUM.gif



-------------------thank you---------------------

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