I need Class 968 EEPROM firmware.

[poker]

Hello, the EEPROM chip in the hot air station shown in the picture is faulty. Where can I find the EEPROM software for this device?

[stj]

post a picture of the board, there are dozens of variations of those stations.
is it a 24c02?

[Agent24]

Does the EEPROM hold program code or calibration data?
I would have thought the program would be in the microcontroller anyway.

Makes me wonder if it's a better choice to get an analogue station with no microcontroller at all...

[stj]

the eeprom just stores the temperature and maybe some cal offsets.
this is an interesting read:
https://www.eevblog.com/forum/review...stom-firmware/

[Agent24]

the eeprom just stores the temperature and maybe some cal offsets.
this is an interesting read:
https://www.eevblog.com/forum/review...stom-firmware/

I'm only about halfway through but definitely a good read! Seems like a lot of those cheap stations could do with that upgrade.

[stj]

some of them could do with blanket resoldering!
i thought about making one at the time, but with an OLED instead of the 3 digit display.

[Agent24]

some of them could do with blanket resoldering!
i thought about making one at the time, but with an OLED instead of the 3 digit display.

It looks like some models on AliExpress already have similar displays.
I am tempted to get a basic 7-segment one and modify it, my hot air station is only 320 watts, these are about twice that, it would seem.

[stj]

i think they are 700w, but only at full airflow unless you want to melt the end-guard on the handpiece.
guess how i know!

they are however so cheap now that i dont even care.

[Agent24]

i think they are 700w, but only at full airflow unless you want to melt the end-guard on the handpiece.
guess how i know!

they are however so cheap now that i dont even care.

lol, oh no....
Makes sense, is there any advantage to the higher wattage stations then? Just faster heat-up time?

[stj]

if you can get enough airflow to keep the temperature under control then a larger unit can in theory heat a bigger area.
the expensive stuff uses a big multi-phase centrifugal blower and upto 1600w of heat.

[Agent24]

if you can get enough airflow to keep the temperature under control then a larger unit can in theory heat a bigger area.
the expensive stuff uses a big multi-phase centrifugal blower and upto 1600w of heat.

Ahh yeah.. silly me... which I suppose would be good for large BGA chips like GPU cores etc

[poker]

Hello, thank you to everyone who responded. The resistance wires of my blower soldering iron short-circuited, shattering and damaging the transformer and motherboard. The EEPROM integrated circuit looks fine, but it's gone when I touch its pins. What can I do? Buying a new one isn't the issue; I enjoy repairing things.

[stj]

the triac was a BTA16-600b
the opto was a MOC3041

clean up the mess and see if the display comes on and you can use the up/down buttons.
to see if the 5v and the cpu still work.

[stj]

did you remove the handpiece with the shorts in it?