What is the significance of BA5417?
That is the part number of a dual output power amplifier. That 15 pin black chip drives the two output speakers on a keyboard that Heather purchased for 20 bucks from someone on Craig's list. I bought a power supply, plugged it in, powered up, and it appeared to work, but no sound. That's because that chipped was fried -- literally. You can see some charring just below the "A" between the 2 and the 6 ( to the left of the "H38"). I was able to find the part from an electronics supplier on the internet and replace it. Voila! It works!
Addendum: Here is a closeup of the chip when I removed it. There are actually two spots that were blown. Look on the "B" and between the "2" and "6". Looking at the chip specifications, the 7th pin from the left is the power ground. So, I think that something internally shorted out to ground and it overheated and literally blew out the side of the ceramic chip. It was fun pulling out my de-soldering iron and removing this chip.
No comments:
Post a Comment