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Creative SBS 370 – 2.1 Speaker Modifications

By on February 27, 2021
Creative SBS 370 - 2.1 Speaker Modifications

 

 

 

 

 

 

 

 

creative speaker repair

Received creative speakers stated problem both the satellite speakers Works intermittently when Vary Volume Control so that It is confirmed problem with the Volume Control. So I opened the external wired Volume Control Unit.

I didn’t find any dust or Physical damage hence Cleaned the 5 Pin potentiometer using IPA. But problem remain same. So decided to change the POT and see the result I am having 4 Pots in my stock I have replaced one but same problem.

creative speaker repairing

For further diagnosis I have opened Woofer Unit (In this type of 2.1 speakers mostly amplifier circuit is located in woofer Unit).

Trying to remove the circuit from back side of the woofer unit but it was stuck somewhere inside.

speaker inside

So tried by removing Woofer to see what wrong inside is. I found Very Short length woofer Cable is connected to the Circuit therefore circuit is not coming out from backside.

speaker troubleshooting

So desoldered the cable from woofer and pulled Circuit out from the back side. You can see large size of Heatsink is attached with main amplifier IC.

how to repair speaker

amplifier ic tda8510j

Circuit Used MC4558CN operational amplifier: https://www.alldatasheet.com/datasheet-pdf/pdf/23296/STMICROELECTRONICS/MC4558CN.html

TDA8510J 26W Power Amplifier:

https://pdf1.alldatasheet.com/datasheet-pdf/view/19497/PHILIPS/TDA8510.html

speaker repairing

For reconfirming doubt of bad volume control I have shorted two wires on volume control signal in & signal out on the PCB (Bypassing Volume control).

and connected the stereo pin in my mobile and played the song I got good loud sound without any disturbance concluded the problem with Volume control & I Removed remote Volume cables & connected external 10K Stereo Pot for final testing & it works Fine without problem.

I have tried replacing 5 pin volume control did not work. I thought because of old stock may be Pots are gone bad so I have purchased two new pots but none of them are worked tested all pots with multimeter all pots showing Ok condition.

Now problem is that remote unit does not having space, where I can put this big stereo pot and not finding place on the woofer box also well because woofer box is made of compressed cardboard if I make Hole by using drill it will damage the cardboard and also thickness of board is not permitting to do so.

I got an idea to install USB/FM/MP3/Bluetooth kit because it has wireless remote which solve my all problem in marginal price difference I have got this kit in price of two Volume controls. I have arranged this Kit from the market.

  bluetoothe kit

It works on 5VDC so decided to give him power from the board only & I found the point from where I can take power it is main filter capacitor where I am getting voltage through adapter of speaker.

Connected 7805 Regulator on mains Filter capacitor for 5V DC for operating Bluetooth kit.

operating bluetooth kit

Confirmed the working of the kit after applying voltages from 7805 regulator.

how to operate bluetooth kit

Now it is time for final fitting preparation. I have cut the one side of woofer box and as per my doubt about damaging cardboard. It was badly damaged while cutting with hacksaw blade but I have managed to fix it by applying some wood glue.

wood glue

And kept the box overnight for curing it properly. Now time for preparation of modification on the amplifier PCB for adding this Kit. Connected external volume control wires from Bluetooth kit directly to the amplifier by removing old control wires.

control wires

control wires for speaker

I Putt Led in place of ON /Off switch for making direct connection by removing On/Off switch wires and putting this as a power indicator backside Near DC Jack of the Box.




R – Indicates right channel of Volume,

L- Indicates Left Channel of Volume and

G- Ground

Now after modification Speakers are ready with new additional options.

creative speaker fixed

This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India.

P.S- Do you know of any your friends who would benefit from this content that you are reading now? If so, forward this website to your friends or you can invite your friends to subscribe to my newsletter for free in this Link.

Note: You can check his previous repair articles in the link below:

https://jestineyong.com/protronics-portable-bluetooth-speakers-repaired/

 

Likes(46)Dislikes(0)

10 Comments

  1. Waleed Rishmawi

    February 27, 2021 at 2:06 pm

    Very creative repair. Thanks for sharing

    Likes(0)Dislikes(0)
    • Yogesh Panchal

      March 1, 2021 at 3:58 pm

      Thanks! Waleed

      Likes(0)Dislikes(0)
  2. Albert van Bemmelen

    February 27, 2021 at 5:32 pm

    You not only fixed the volume control by installing an USB/FM/MP3/Bluetooth kit but this way also added FM radio to the Creative 2.1 speaker amplifier! Which so to speak was very creative! Something that they also could use instead of their failing 5 pin stereo volume potmeters!

    Likes(2)Dislikes(0)
    • Yogesh Panchal

      March 1, 2021 at 4:03 pm

      Creative is one of Good Brand for sound clarity & audio products,but don't know why they are not improving their products enhancement. All creative speaker with cabled remote having same problem.

      Likes(0)Dislikes(0)
  3. Parasuraman S

    February 27, 2021 at 11:33 pm

    Vow! Great out of the box thinking solution! Hat's off! Many thanks for sharing!

    Likes(1)Dislikes(0)
    • Yogesh Panchal

      March 1, 2021 at 4:08 pm

      Sir,
      I have enhanced my knowledge and out of the box thinking from all of you & reading everyone's experience here on the blog.

      Likes(0)Dislikes(0)
  4. Lynn Blakely

    February 28, 2021 at 11:34 am

    Sir Yogesh: You have used you innovation capacity for a unique solution with added features. Excellent Job

    Likes(0)Dislikes(0)
    • Yogesh Panchal

      March 1, 2021 at 4:10 pm

      Lynn,
      Thanks! for Encouraging.

      Likes(0)Dislikes(0)
  5. Robert Samuel

    February 28, 2021 at 5:22 pm

    Really creative repair. Solve the problem and enchance the functions of the speakers. Congratulations.

    Likes(0)Dislikes(0)
  6. Yogesh Panchal

    March 1, 2021 at 4:11 pm

    Robert Samuel
    Thanks! for your Kind words.

    Likes(1)Dislikes(0)

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