I doubt I can find a schematic for this.Looking at what appears to be a crystal beside it my best guess is it's a pre programmed micro controller. With 18 pins it could be any of several and even knowing a part number you will not know what code has been loaded into it. This is common with proprietary parts in designs. Less a board schematic no way to tell at a glance.
Yes. Also see if you can determine the Vcc and GND pins.You can often identify a microcontroller from the number of pins and the position of the crystal pins.
There's nothing writen under the sticker, and no glass cover. Just a regular black plastic packaging.Yes. Also see if you can determine the Vcc and GND pins.
Is that sticker stuck on a top of a rectangular glass cover on top of the chip?
That would indicate that there is a UV-EPROM inside the chip.
There are not too many UV-EPROM MCUs in 18-pin 0.300" pitch DIP.
Edit: I was about to suggest removing the label.
That's sort of a giveaway. They remove the chip part number.I just noticed that the top of the IC seems like it was sanded... maybe for the purpose of removing the letters.
Well, nothing really.Why do you think that chip is the cause of your problem ? In my experience microcontrollers are VERY reliable. Even if you identify the chip how do you plan to get the code to program it ?
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