Lenovo 330-15ich dead

[Kitayu]

Hi, this morning when measuring the input voltage of the device I am powering with the adjustable power supply, I accidentally short-circuit the signal pin with 19 and the device went silent


How do I handle this? Is the processor damaged? When I looked at the datasheets, I saw that the signal pin did not go directly to important places, but the device does not work



Mainboard : EG530 NM-B671

I look forward to your very urgent help, thank you in advanceI look forward to your very urgent action, thank you in advance

[mon2]

Re: Lenovo 330-15ich dead

Which signal pin?

Start with the main power rail review at the charger IC.

Carefully, measure the voltage to ground of N2.

Schematic is here:

https://www.badcaps.net/forum/showthread.php?t=96270

What is the voltage?

[Kitayu]

Re: Lenovo 330-15ich dead

Which signal pin?

Start with the main power rail review at the charger IC.

Carefully, measure the voltage to ground of N2.

Schematic is here:

https://www.badcaps.net/forum/showthread.php?t=96270

What is the voltage?

I'm talking about the pin that tells me how many watts the adapter is


Take voltage measurementI will look at the schematics you threw when I go to the workshop, the measurements I take now are as follows:


19 volts goes healthy up to the mosfets, but the on key goes 1.5 - 2.0 volts, not 3 volts, but I'm not entirely sure because the on key is on the keyboard and I don't know which pin on the keyboard belongs to the on key. But all voltages are no more than 2 volts

[Kitayu]

Re: Lenovo 330-15ich dead

Sorry for bad english, i used translate

[Kitayu]

Re: Lenovo 330-15ich dead

Which signal pin?

Start with the main power rail review at the charger IC.

Carefully, measure the voltage to ground of N2.

Schematic is here:

https://www.badcaps.net/forum/showthread.php?t=96270

What is the voltage?

Hello, I looked at your schematic, but it is the same as the schematic I have, exactly which pages do I need to look at?

[mon2]

Re: Lenovo 330-15ich dead

PU301, check the voltage to ground of:

pin 1 (ACN)
pin 2 (ACP)
pin 3 (CMSRC)
pin 4 (ACDRV)
pin 5 (ACOK)
pin 6 (ACDET)
pin 24 (REGN)

[JaroTech]

Re: Lenovo 330-15ich dead

Hi, what voltages do you have on resistor PR109 on both sides?

[Kitayu]

Re: Lenovo 330-15ich dead

PU301, check the voltage to ground of:

pin 1 (ACN)
pin 2 (ACP)
pin 3 (CMSRC)
pin 4 (ACDRV)
pin 5 (ACOK)
pin 6 (ACDET)
pin 24 (REGN)

sure

pin 1 : 19v
pin 2: 19v
pin3: 19v
pin4: 24.8v
pin5: 0v
pin6: 2.7v
pin24: 18.7v

[Kitayu]

Re: Lenovo 330-15ich dead

Hi, what voltages do you have on resistor PR109 on both sides?

i cant find this

[Kitayu]

Re: Lenovo 330-15ich dead

PU301, check the voltage to ground of:

pin 1 (ACN)
pin 2 (ACP)
pin 3 (CMSRC)
pin 4 (ACDRV)
pin 5 (ACOK)
pin 6 (ACDET)
pin 24 (REGN)

I don't understand what you mean by ground line. I fixed the negative probe to the ground and measured with the positive lead.

[Sephir0th]

Re: Lenovo 330-15ich dead

If the middle pin was shorted with charger plus, at least the Embedded controller has blown up for sure. Time to look there, I'd say. Charging circuit looks absolutely fine ( ACOK could be missing because of a shorted +3VL ).

[Kitayu]

Re: Lenovo 330-15ich dead

If the middle pin was shorted with charger plus, at least the Embedded controller has blown up for sure. Time to look there, I'd say. Charging circuit looks absolutely fine ( ACOK could be missing because of a shorted +3VL ).

hello, can you tell me exactly where I should look with the name on the diagram?

note: when I take a measurement again, there is no data about 3 volts and 5 volts. there is only 19 volts

[reformatt]

Re: Lenovo 330-15ich dead

ADAPTER_ID goes directly to the EC on pin 72. With PR109, it's supposed to form a voltage divider from +3VALW with a resistor in the charger. Therefore, pin 72 should never be exposed to anything above 3V.

There is a protection device PD102 but given your symptoms I'd agree with @Sephir0th and say you fried your EC. It's a flaw in Lenovo's designs, as a collapsed/shorting charge socket can do the same thing, and it usually results in a shorted EC.

[mon2]

Re: Lenovo 330-15ich dead

pin24 (REGN): 18.7v

REGN = 18v7 ?? Confirm it is ~6 volts since your ACDRV makes sense to be ~25v.

But as per above, review your EC for damage.

[Kitayu]

Re: Lenovo 330-15ich dead

REGN = 18v7 ?? Confirm it is ~6 volts since your ACDRV makes sense to be ~25v.

But as per above, review your EC for damage.

What exactly are we talking about when we say embedded controller?

[khaahk]

Re: Lenovo 330-15ich dead

Page 2 schematic shows block diagram. EC=embedded controller=IT8586E

[Kitayu]

Re: Lenovo 330-15ich dead

I see another small dot on the ec that is independent of its pointer point (in the middle) I guess that's a sign of blushing

anyway i'll see if i have this, or i'll order it, but are there any measurements i need to take to make sure the ec is fully lit?

[mon2]

Re: Lenovo 330-15ich dead

You should post a clear picture of the EC for a review.

[mcplslg123]

Re: Lenovo 330-15ich dead

Before ordering the new EC,keep it in mind that its need to be programmed.

[Kitayu]

Re: Lenovo 330-15ich dead

Before ordering the new EC,keep it in mind that its need to be programmed.

I have a model of this computer without a graphics card and a round socket. Ec are the same. I'm going to use it, I only have the eeprom programmer in my hand, so I can't program it, would it be a problem?