TDA7353 based amplifier for beginner - Page 1
Forum section: electronics / projects

author: FizZzyCap
author_rank: Newbie
timestamp: March 20, 2019, 08:42:05 pm
content: Hei. Have had a Logitech z-10 for around 10 year and was greatfull for the sound it delivered but lately a static sound has become for prominet while the speakers are on, even when there is no music playing.It has it, that i'm a total beginner to electronic and aspecialy over my head with a fault search attempt. I have taken an interest for electronic and have some basic material and components with some tools. My current goal is to gut the Z-10 speaker case and replace original circuit pcb with an diy prototype board. Dividen amoung the two cases are a power supply european 240 lead and the other have the pcb, lcd and button with a ribbon cabbles.So i ask here hopeful for a compete guide on how to take out essential components from an Logitech Z-10 for a TDA7377 based amplifier. If integration of an TDA1517 is possible also, that would be above nifty.TDA7377http://www.alldatasheet.com/datasheet-pdf/pdf/82979/STMICROELECTRONICS/TDA7377.htmlTDA1517http://www.alldatasheet.com/datasheet-pdf/pdf/19199/PHILIPS/TDA1517.htmlLM217Thttp://www.alldatasheet.com/datasheet-pdf/pdf/521103/STMICROELECTRONICS/LM217T.htmlNot sure but may be an GBU6Jhttp://www.alldatasheet.com/datasheet-pdf/pdf/14725/PANJIT/GBU6J.html

author: Audioguru
author_rank: Super Contributor
timestamp: March 21, 2019, 01:36:28 am
content: The audio power amplifier ICs you listed are obsolete and are not made anymore. I look atwww.digikey.comto see if they are active and in stock or they are obsolete.A beginner will have a nightmare making a high quality audio amplifier on a "prototype" board because it will oscillate at a high frequency caused by the many rows of contacts and the messy maze of wires all over the place. Buy a kit that has a properly designed pcb instead.

author: battmyrne216
author_rank: Newbie
timestamp: March 21, 2019, 03:15:11 am
content: seems a bit advanced for a beginner project. Audio can be a touchy adventure.

author: FizZzyCap
author_rank: Newbie
timestamp: March 25, 2019, 07:50:10 pm
content: Thanks for the replays.Would agree with that it seams like a daunting task for a begginer, but it kinda buthers me that it is only a static noise and all else seams to works good.Is there a common way to fault search for static noise? Maybe a compont can be changed instead of gutting the speakers.

author: Audioguru
author_rank: Super Contributor
timestamp: March 25, 2019, 11:36:48 pm
content: If it plays static sounds all the time then the IC that is not made anymore is defective and needs to be impossibly replaced. Kiss it Goodbye and bury it. Then buy a new model.

author: DaJMasta
author_rank: Super Contributor
timestamp: March 26, 2019, 12:00:41 am
content: I agree it will be a tricky one to make sound really good, but it shouldn't be difficult to restore functionality. Since audio amps are pretty popular, you have a whole slew of project options floating around, and there are some complete kits or PCB/instruction kits available that could be a good starting point for understanding how they work and then maybe making modifications.If one of your tools is an oscilloscope (or even a multimeter that will read AC voltage to at least some tens of kHz) you may be able to find some noise on power rails or something that's giving you the static, it could be a gradual capacitor failure or similar if the unit otherwise seems to be working. Potentially fixable if you can diagnose what part is the issue.