Author Topic: JCD 8898 IC shorted  (Read 1350 times)

0 Members and 1 Guest are viewing this topic.

Offline NiethateTopic starter

  • Newbie
  • Posts: 5
  • Country: aw
JCD 8898 IC shorted
« on: March 22, 2023, 05:39:31 pm »
Hello,

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



 

Online coromonadalix

  • Super Contributor
  • ***
  • Posts: 6856
  • Country: ca
Re: JCD 8898 IC shorted
« Reply #1 on: March 22, 2023, 08:20:16 pm »
clean the top  of the ic and check for markings ?
 

Offline NiethateTopic starter

  • Newbie
  • Posts: 5
  • Country: aw
Re: JCD 8898 IC shorted
« Reply #2 on: March 23, 2023, 03:17:42 am »
There ar no markings on it.
 

Offline GGMM

  • Frequent Contributor
  • **
  • Posts: 261
  • Country: fr
Re: JCD 8898 IC shorted
« Reply #3 on: March 23, 2023, 08:26:47 am »
Hi,

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

cdt
 

Offline GGMM

  • Frequent Contributor
  • **
  • Posts: 261
  • Country: fr
Re: JCD 8898 IC shorted
« Reply #4 on: March 23, 2023, 08:28:54 am »
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
 

Offline GGMM

  • Frequent Contributor
  • **
  • Posts: 261
  • Country: fr
Re: JCD 8898 IC shorted
« Reply #5 on: March 23, 2023, 08:34:42 am »
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
 

Offline NiethateTopic starter

  • Newbie
  • Posts: 5
  • Country: aw
Re: JCD 8898 IC shorted
« Reply #6 on: March 24, 2023, 11:26:44 pm »
The chip gave me a short  when I removed the chip all the shorts where gone
 

Offline NiethateTopic starter

  • Newbie
  • Posts: 5
  • Country: aw
Re: JCD 8898 IC shorted
« Reply #7 on: March 24, 2023, 11:31:03 pm »
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
 

Offline DavidAlfa

  • Super Contributor
  • ***
  • Posts: 6317
  • Country: es
Re: JCD 8898 IC shorted
« Reply #8 on: March 26, 2023, 02:22:42 am »
Perhabs a S3F94C8 mcu, seems common in Hot Air stations.
Hantek DSO2x1x            Drive        FAQ          DON'T BUY HANTEK! (Aka HALF-MADE)
Stm32 Soldering FW      Forum      Github      Donate
 

Offline NiethateTopic starter

  • Newbie
  • Posts: 5
  • Country: aw
Re: JCD 8898 IC shorted
« Reply #9 on: March 26, 2023, 12:21:54 pm »
Thank you will buy one and let you know how it went
 

Offline DavidAlfa

  • Super Contributor
  • ***
  • Posts: 6317
  • Country: es
Re: JCD 8898 IC shorted
« Reply #10 on: March 26, 2023, 12:38:17 pm »
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.
Hantek DSO2x1x            Drive        FAQ          DON'T BUY HANTEK! (Aka HALF-MADE)
Stm32 Soldering FW      Forum      Github      Donate
 

Offline GGMM

  • Frequent Contributor
  • **
  • Posts: 261
  • Country: fr
Re: JCD 8898 IC shorted
« Reply #11 on: March 26, 2023, 03:07:40 pm »
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
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf