Hello AAC community!
I'm here to ask for your help: my sister have an old HDD (extracted from a media center) that didn't boot anymore (disk do not spin when powered), but obviously, there is a lot of important stuff in it
I noticed that when powered up, a particular IC comes hot (and smells...) so much that solder starts to melt on its pads!
This component is a SMD and looks it's polarized (there is a line on the package, close to one of the two pins).
According to this SATA diagram, the component is directly connected to 12VDC and it looks it acts as a watch guard for the rest of the circuit (12VDC rail powering all around the PCB).
I wondered if this IC was kind of a diode, but surprisingly, the line is drawn on the connector side (input), it's a non sense for me: when block the current from 12V but distribute it via a power rail? So I tried to soldered a SS34 in place, but no result (at least, it does not melt).
I can read the following inscription on the package:
I started to look for such component on the web... but found nothing exact match, only approaching results:
- from STMicroelectronics
- from digikey
Is the component obsolete (great chances, according to the age of the media center)?
Do you have any hints / explanations / guidances? Even if the component, I'm afraid something else is broken on the circuit but I have the intuition that a component so close to the 12VDC input should act a the guard and protect the rest of the circuit? Am I right?
Enclosed, some photos of the component and circuit.
Cheers,
Nicolas
I'm here to ask for your help: my sister have an old HDD (extracted from a media center) that didn't boot anymore (disk do not spin when powered), but obviously, there is a lot of important stuff in it
I noticed that when powered up, a particular IC comes hot (and smells...) so much that solder starts to melt on its pads!
This component is a SMD and looks it's polarized (there is a line on the package, close to one of the two pins).
According to this SATA diagram, the component is directly connected to 12VDC and it looks it acts as a watch guard for the rest of the circuit (12VDC rail powering all around the PCB).
I wondered if this IC was kind of a diode, but surprisingly, the line is drawn on the connector side (input), it's a non sense for me: when block the current from 12V but distribute it via a power rail? So I tried to soldered a SS34 in place, but no result (at least, it does not melt).
I can read the following inscription on the package:
ST E (STMicroelectronics logo)
BUF
C811
BUF
C811
I started to look for such component on the web... but found nothing exact match, only approaching results:
- from STMicroelectronics
- from digikey
Is the component obsolete (great chances, according to the age of the media center)?
Do you have any hints / explanations / guidances? Even if the component, I'm afraid something else is broken on the circuit but I have the intuition that a component so close to the 12VDC input should act a the guard and protect the rest of the circuit? Am I right?
Enclosed, some photos of the component and circuit.
Cheers,
Nicolas