- Unexpected Shorted Parts In LG LED TV
- How To Repair LED TV Mainboard
- You Will Be Stunned Of What’s Found Inside The TV (No Power Fault)
- Shorted SMD Transistor In LED TV
- Never Saw TV LED Lights Like These
- Simple Way To Repair Color Problem In LED TV
- A LED TV Repair Attempt With A Disappointing Result
- How To Repair No Power Symptom In LED TV
- Dead LED TV restored back to life. Model: Fuji Japan
- 50″ LED TV Display Problem Repaired
Guess Which Component That Had Caused Vibration Sound in Telesonic Speaker?
A customer sent to me this Telesonic subwoofer system with the complaint of vibration sound coming out from the speaker.
Testing with another good speaker have proven that it had nothing to do with the speaker thus the problem is in the electronics.
After removing the cover I could see seven pieces of audio amplifier IC (TDA2030) attached to a large heatsink. There were no other bad components (from visual inspection) and all the connectors were perfectly seated.
I started to check the audio amplifier IC and made comparison and found that one of the amplifier IC resistance was different from the other.
Next, I took out the suspected IC and replaced it with a new IC.
Below is the datasheet of the TDA2030 IC. You can click on the photo below to view the pdf file.
After replacement with a new IC and powered On the sound was perfectly fine again (no more vibration sound).
Conclusion- When you see any IC that has similar part number (especially in a circuit that have two quite similar circuit like the left and right channel of amplifier) then you can use the resistance check. Any big differences in resistance reading indicates that the point you are comparing have problem. You can also perform such test on RGB transistors in CRT TVs and Monitors because the Red, Green and Blue have almost the same circuit and components.
This article was prepared for you by Suranga Bandara who owns an Electronics repair shop in Anuradapura, Sri Lanka.
Please give a support by clicking on the social buttons below. Your feedback on the post is welcome. Please leave it in the comments. If you have electronic repair articles to share with us, please contact us HERE.
P.S- If you enjoyed reading the above article, click here to subscribe to my blog (free subscription). That way, you’ll never miss a post. You can also forward this website link to your friends and colleagues-thanks!
Note: You may check out his previous post in the below links: