Searching for burnt ic number of a key-boom-board piano

 

I see the first letter is T and a J further on.
Try to make out the marking as best as you can.
You are in the best position than anyone else here to be able to make out the markings on the chip.

Also see if you can identify the function of the chip and pins.
Pin-5 appears to go to GND.

 

The chip is an audio amp, but not one of the common ones. Most standard amps from TI/ST/OnSemi/MAXIM/etc have pin 7 as GND and 5 and 8 as speaker connections. This has pin 5 as GND and pins 6 and 8 as speaker N and speaker P (via L2, L3 and R10).

 

The chip is an audio amp, but not one of the common ones. Most standard amps from TI/ST/OnSemi/MAXIM/etc have pin 7 as GND and 5 and 8 as speaker connections. This has pin 5 as GND and pins 6 and 8 as speaker N and speaker P (via L2, L3 and R10).

Good observation. Hence we're looking at a Class-D audio amplifier.

 

Most importantly. What is the board piano’s brand and model number?
Perhaps you could even find the schematic on the web.

 

Good observation. Hence we're looking at a Class-D audio amplifier.

Sir i have checked the pinout here are the breakdown
Pin 1 maybe the non inverting input maybe
Pin 2 -ve maybe inverted input (as it show 37 ohm resistance with gnd)
Pin 3 -ve maybe inverted input (conected with capacitor-ve with 12 ohm resistance)
Pin 4 +ve( conected with cap +ve)
Pin 5 gnd
Pin 6 speaker -ve output through inductor
Pin 7 connected with collector or pin 3 of PNP transistor pin named MPS8550D
Pin 8 connected with +ve out speaker
Sir i have searched too much for its compitable ic still failed to find please help me you are kind also a gentleman

 

Most importantly. What is the board piano’s brand and model number?
Perhaps you could even find the schematic on the web.

Sir it is ELC brand and model name is key-boom-board piano
I have tried with manufacturer they replied that they have closed the product and dont have its schematic or its parts thats why i am searching online solution for its compatible amplifier IC

 

Most importantly. What is the board piano’s brand and model number?
Perhaps you could even find the schema

Sir i have checked the pinout here are the breakdown
Pin 1 maybe the non inverting input
Pin 2 -ve maybe inverted input (as it show 37 ohm resistance with gnd)
Pin 3 -ve maybe inverted input (conected with capacitor-ve with 12 ohm resistance)
Pin 4 +ve( conected with cap +ve)
Pin 5 gnd
Pin 6 speaker -ve output through inductor
Pin 7 connected with collector or pin 3 of PNP transistor pin named MPS8550D
Pin 8 connected with +ve out speaker

 

Need help

 

You might just be in luck.... Does it look like this one?

 

You might just be in luck.... Does it look like this one?

View attachment 345440

Absolutely yes Sir, this is

 

Yes sir this is the same one

 

The one in my picture is my grand-daughters, its about 8y old. I will try and open it up and get the part number for you.

 

Sir that's a great favour for me. Further it is also requested that two more detailed picture also required of PCB components side if possible. Thanks alot sir

 

Will try and do it tomorrow afternoon UK time. Are there any other parts you need info on?

 

Yes sir also picture of two capacitors beside thr transistor. If comfortable for you

 

Ok, here's the best I can do without desoldering the board completely...

The capacitors are 2 X 470uF 10v and the smaller is a 47uF 16v



The chip is a TRA1309CP




Now, this keyboard normally runs on AA cells, which are unlikely to cause that level of damage. So it's probable that damage was caused by an incorrect AC/DC adapter, either too high a voltage, or reversed polarity. Either way, if that was the case I wouldn't hold out to high a hope that the synth chip is OK.

The other possibility is the AC adapter was plugged into the headphone socket. That might have blown the amp but the synth might have survived... Maybe.

 

Sir, I am extremely grateful for your help.
I tested the chip, which was functioning correctly, and the board's indicator lights were blinking. I also checked the audio using an external amplifier IC—while the sound wasn’t perfect, there was some output. Thats why i was trying to search for the right amplifier IC online, and your guidance made it possible. Without your support, I could never have identified the correct IC number. These days, people like you who selflessly dedicate their precious time to assist others are hard to find. I truly wish I can return the favor someday. Once again, from the bottom of my heart, thank you so much for your help for your precious time and guidance. may you live long

 

Irving;
May I ask how did you download the Tritan’s device data sheet?
I researched their website and appears to have very interesting products. However to download the data sheet, one must be a “member”, with no information on how to become one.

 

Sir its simple to download the datasheet but it was not on titan website. It is available somewhere else here is the link below
https://datasheet4u.com/datasheet/TRITAN-TECHNOLOGY/TRA1309CP-910989