JCD 8898 IC shorted

[Niethate]

Hello,

Does any one know which ic this is on the jcd 8898 trying to fix it or is there a schematic for

[coromonadalix]

clean the top  of the ic and check for markings ?

[Niethate]

There ar no markings on it.

[GGMM]

Hi,

Why did you unhook that chip?
What was the breakdown?

cdt

[GGMM]

If the iron was no longer working, it comes to 99% of the diode zener 5v on this PCB
Then replace with a classic zener other than SMD

cdt

[GGMM]

My first blacout ---> the zener 5v


This is my second blackout here
https://www.eevblog.com/forum/repair/my-station-iron-hot-air-explosed-ref-jcd-8898/msg4711205/#msg4711205
if it can help you

Now working nice

cdt

[Niethate]

The chip gave me a short  when I removed the chip all the shorts where gone

[Niethate]

I fixed the iron by changing the bta transistor, the heater doesn't work so I tested the components that I changed and it was all shorted again when I tried the heater so when I removed the chip all the shorts where gone

[DavidAlfa]

Perhabs a S3F94C8 mcu, seems common in Hot Air stations.

[Niethate]

Thank you will buy one and let you know how it went

[DavidAlfa]

It's a mcu, so replacing it won't make it work, must be programmed, I doubt you could do that easily, nor getting the original firmware.

At this point, just get a new station, or try to find a new board.

[GGMM]

Hello,

I don’t quite understand your breakdown.
You say a short circuit, but on what?
Is it on the mains? Is it all blown up and the fuse?
I don’t see this circuit blowing the power.
When you say the iron worked and not the hot air, was there the temperature indication of the soldering iron?

Etc...
cdt