Technical Support Do rectifier chips require programming?

[Melancholia]

The good news is I've done my first successful desktop motherboard diagnosis after studying some of the course work! The bad news is it turned out to be a shorted IR35201 chip. I was hoping someone might be able to suggest what I do next. It would be very appreciated if anyone might be able to direct me to an article or video, too.

The motherboard is a mini-atx Gigabyte Aorus x570 I pro wifi. Thanks!

 

[Patrick Ribbsaeter]

Would be better if you posted more details of what u actually have done so far.. the more clues and details u give the better answers you receive..

 

[Hosein Asadolahi]

The good news is I've done my first successful desktop motherboard diagnosis after studying some of the course work! The bad news is it turned out to be a shorted IR35201 chip. I was hoping someone might be able to suggest what I do next. It would be very appreciated if anyone might be able to direct me to an article or video, too.

The motherboard is a mini-atx Gigabyte Aorus x570 I pro wifi. Thanks!

are you have any schematic or boardview for this model ???

 

[Melancholia]

No, there were no schematics or boardviews for this motherboard that I could find...

The capacitors were short for the IR35201 chip and when I took it out of the circuit the capacitors were fine. The IR35201 chip regulates the CPU voltage, according to the datasheet, so I have no idea if a replacement chip will need to be programmed for the x570 chipset CPUs.

Believe me, I'd give more info if I could, but all I've done is remove the internal rectifier chip. May I upload the IR35201 datasheet?

Thanks for the support!

 

[Hosein Asadolahi]

No, there were no schematics or boardviews for this motherboard that I could find...

The capacitors were short for the IR35201 chip and when I took it out of the circuit the capacitors were fine. The IR35201 chip regulates the CPU voltage, according to the datasheet, so I have no idea if a replacement chip will need to be programmed for the x570 chipset CPUs.

Believe me, I'd give more info if I could, but all I've done is remove the internal rectifier chip. May I upload the IR35201 datasheet?

Thanks for the support!

How did you come to the conclusion that the capacitor is defective ??
resistance of chipset is low so when you test inductor of pwm's circuit with buzzer testing you think it's a problem if it is not .
if pwm circuit not working , check en signal or other signal .

 

[Patrick Ribbsaeter]

I suggest you spend more time and watch Dr bios all videos.. Majority of information you will find in their videos if u take note(pen and paper). You need to know more about what voltages etc you working on and be able to explain how you came to your conclusions.. More information is key if people going to help. the more symptoms you can explain the better.. study videos first

 

[Melancholia]

I had no idea I'd get this much attention! I didn't want to waste anyone's time, so thank you for wanting to help! This was just a dead motherboard I got very cheap to practice with. There's no rush to have it fixed.

If you're curious how I came to my conclusions, I forgot the details and only just started a recording details of everything I repair now. The board is dead. No lights, no beep codes. +3.3v power rail had the same measurement on both probes in diode mode (I believe power was missing from the PCH block, but I can't remember). I set my bench power supply to +3.3v and set the limit to 2 amps. The board was drawing just below 2 amps and the IR35201 was getting hot. I measured the capacitors and it had no resistance so I concluded that the chip must be short. It shouldn't be drawing power if the board is completely off, right?

Hosein, you're suggesting that the chip itself just has very low resistance and that's why the capacitors seemed like they were shorted? Do you think I fried the chip with my power supply? How should I proceed next time?

Thank you LagaDatorUmea, I had started a journal, did the basic electronics course and all the desktop motherboard videos! I should do more studying, but you understand I have to play around once and a while

Sorry for not giving more details in the first place, I didn't think anyone would help as much as they had! I only started this thread because I didn't know if you need to order a chip pre-programmed or what chips do require programming.

EDIT: Realized that the IR35201 chip just supplies the +3.3v, so that doesn't mean that it's short because 2 amps is going through it...
Any suggestions what I should try next? Best thing I can think of is apply +3.3v to pin #8 of the bios chip, but if it was short, wouldn't it turn on for a moment and immediately go into protection mode? Would it be too soon just to assume the PCH chip is dead?

 

[Hosein Asadolahi]

I had no idea I'd get this much attention! I didn't want to waste anyone's time, so thank you for wanting to help! This was just a dead motherboard I got very cheap to practice with. There's no rush to have it fixed.

If you're curious how I came to my conclusions, I forgot the details and only just started a recording details of everything I repair now. The board is dead. No lights, no beep codes. +3.3v power rail had the same measurement on both probes in diode mode (I believe power was missing from the PCH block, but I can't remember). I set my bench power supply to +3.3v and set the limit to 2 amps. The board was drawing just below 2 amps and the IR35201 was getting hot. I measured the capacitors and it had no resistance so I concluded that the chip must be short. It shouldn't be drawing power if the board is completely off, right?

Hosein, you're suggesting that the chip itself just has very low resistance and that's why the capacitors seemed like they were shorted? Do you think I fried the chip with my power supply? How should I proceed next time?

Thank you LagaDatorUmea, I had started a journal, did the basic electronics course and all the desktop motherboard videos! I should do more studying, but you understand I have to play around once and a while

Sorry for not giving more details in the first place, I didn't think anyone would help as much as they had! I only started this thread because I didn't know if you need to order a chip pre-programmed or what chips do require programming.

EDIT: Realized that the IR35201 chip just supplies the +3.3v, so that doesn't mean that it's short because 2 amps is going through it...
Any suggestions what I should try next? Best thing I can think of is apply +3.3v to pin #8 of the bios chip, but if it was short, wouldn't it turn on for a moment and immediately go into protection mode? Would it be too soon just to assume the PCH chip is dead?

you can disconnect pch from +3.3v and inject 3.3v to pin8 bios ic and test .
do you test 3v and 5v standby ?

 

[Melancholia]

I'm going to have to figure out how to disconnect the PCH from the circuit, it's a mini-atx motherboard so everything is just crammed together. I believe +5vsb seemed fine. The 3vsb is the battery, right?

It's worth mentioning that I have a ATX power supply tester, and all the voltages are good in my power supply.

 

[Hosein Asadolahi]

I'm going to have to figure out how to disconnect the PCH from the circuit, it's a mini-atx motherboard so everything is just crammed together. I believe +5vsb seemed fine. The 3vsb is the battery, right?

It's worth mentioning that I have a ATX power supply tester, and all the voltages are good in my power supply.

The 3vsb is NOT the battery . with one regulator 5vsb convert to 3vsb

 

[Melancholia]

Yeah, I checked my notes on the "How To Repair Short Circuit Of Asus H81M-C" and realized it too late. How embarrassing, hahaha!