Where is the (very quiet) buzzer on MK4?
After investigating multiple posts and testing a wide range of M300 commands I have come to the conclusion its a hardware issue why the buzzer is so quiet.
Partly it's so high pitched and only a few frequencies make a slightly loud noise.
Does anyone know where the physical buzzer device is located? I'm guessing it's just a cheap piezoelectric disc.
RE: Where is the (very quiet) buzzer on MK4?
It's the beige rectangle on the back of the LCD board, labelled KMTG1603-1. It's next to the connector.
RE:
Yep, buzzer on MK4 is a biggest shame of Prusa, since it's totally unusable. It's located on the LCD board: a white square thing (marked with red circle on the picture). I removed it and added small amplifier board (from aliexpress) and somewhat bigger speaker. You can find 5V somewhere on that board, too (for powering amplifier)
RE: Where is the (very quiet) buzzer on MK4?
Does anyone have the schematics for the xLCD board?
RE: Where is the (very quiet) buzzer on MK4?
Found it in another post (in case anyone else wants it) https://forum.prusa3d.com/forum/original-prusa-xl-tool-changer-hardware-firmware-and-software-help/xl-electrical-schematic/#post-708423
KMTG1603-1 25V 5mA - Datasheet link https://www.farnell.com/datasheets/97521.pdf
Simple fix to get an audible buzzer
I just soldered a cheap piezo buzzer across the useless Prusa one. Now I can hear it.
No need for amplifier
RE: Where is the (very quiet) buzzer on MK4?
Yeah, i tried that, too, but it was still to quiet for me. I guess i didn’t have correct buzzer module…
RE: Where is the (very quiet) buzzer on MK4?
is what I used