HP OMEN TP-Q194 - No 3.3V request for element identification

Hi.
I received an hp omen TPN-Q194 DAG3AAMBAG0 laptop that did not respond to the power button. After quick measurements, it turns out that the 3.3V converter is not working
No short circuits on the coils, 5V present.
I wanted to replace the system responsible for 3.3V, however, it is coded and is called AWV7YJ. I would like to know the real name of this system in order to order a new one because I do not have a diagram of this board.
A picture of this layout is attached

Type in the "search" phrase: AWV
You have 11 correct answers

e.g.

koko115 wrote:

I would like to know the real name of this system in order to order a new one because I do not have a schematic for this board.

SY8286BRAC.

Can you help me diagnose this converter? Because I'm not sure if it's the system's fault.

Is it getting 19v? warming up?

19V is coming. He's not warming up.

I will add that 19V from the power supply of the converters disappears after about 2 minutes after connecting the board to the power supply. Values measured immediately after connecting the power supply: No signal (EN1) on the 12th leg of SY8286BRAC. On the 11th leg (EN2) there is 4.3V
Will these voltages be enough to start this converter?
There is also no +3VALWP on the 9th leg of SY8286BRAC (PG) and no 3V on the 6th leg (LX signal)

Does it have an LDO present?

boro1234567 wrote:

Does it have an LDO present?

Yes, the LDO is 3.31V

Quote:

19V from the power supply of the converters disappears after about 2 minutes after connecting the board to the power supply.

_________________________________________
There is an ITE8987e on this kbc board
- read about it on the forum
-you have 3V on the button and it drops when pressed
- it comes to kbc and ... there is a translation of this signal ... on other pins
- Kbc power supply you have

HM175 SR30W chipset
i7-7700HQ
DDR4
GTX 1050 (N17P-G0-A1) 2GB



There is no SM for this Quanta platform, but use similar solutions

In Quanta solutions (quanta G75a... is N17P-G0-A1 1050M) / Quanta ZR?/ under AMD cpu) / DAX61CMB6DO / DA0X63MB6H1
*other
- you do not have a short circuit on this 3.3V line, this voltage supplies e.g. RTC and CMOS battery through e.g. a diode system > see e.g.

There is 3V on the switch.
But for some reason the 3.3V converter does not work, I would like to explain it at the very beginning.

koko115 wrote:

But for some reason the 3.3V converter does not work, I would like to explain it at the very beginning.

Possible causes include a damaged controller after excluding other causes such as no power supply, short circuit on the LDO, short circuit on the inverter output, correct control.

boro1234567 wrote:

koko115 wrote:

But for some reason the 3.3V converter does not work, I would like to explain it at the very beginning.

Possible causes include a damaged controller after excluding other causes such as no power supply, short circuit on the LDO, short circuit on the inverter output, correct control.

Due to the fact that the converter is powered, there is no short circuit on the LDO and there is 3.3V, there is no short circuit anywhere, i.e. replace the SY8286BRAC? Can you tell me how to check the controls? Is it about these EN1 and EN2 signals?

Yes
Look at the applications of this IC
- eg from this forum link
- Elviks link
- China Link_ a lot

koko115 wrote:

Is it about these EN1 and EN2 signals?

Exactly.

So, due to the lack of signal on EN1, I can conclude that the ITE needs to be replaced?

Look e.g. in SM under HP on the platform (Quanta Y31A rev:C)
-same kbc, e.g. cpu SR1EB ( i7-4510U) and GTX 870M N15P-GT-A2
3/5V made on SY8208, EN pins

lisek wrote:

Look e.g. in SM under HP on the platform (Quanta Y31A rev:C)
-same kbc, e.g. cpu SR1EB ( i7-4510U) and GTX 870M N15P-GT-A2
3/5V made on SY8208, EN pins

Suggesting this diagram, it turns out that one signal activates two 3/5V converters, this signal is S5_ON from KBC.
But the 5V converter works.. so it can't be a faulty ITE.
Guys, thank you for your patience, and I'm still asking for an answer and getting on the subject

You have in attachment SM for Quanta G74A platform (DAG74AMB8D0)
- same kbc and 3/5V chips
- read what signals from kbc are needed to run DC-DC 3V PU10 SY8286BRAC p.39
* dc-dc 5V is PU11 SY8288CRAC

How can you not handle it now?

ps
Similar solutions on Quanta Y11A
-same cc
- dc-dc 3/5V on SY8208, page 38
3V has two ENs Link_ SM under Y11C

lisek wrote:

You have in attachment SM for Quanta G74A platform (DAG74AMB8D0)
- same kbc and 3/5V chips
- read what signals from kbc are needed to run DC-DC 3V PU10 SY8286BRAC p.39
* dc-dc 5V is PU11 SY8288CRAC

How can you not handle it now?

ps
Similar solutions on Quanta Y11A
-same cc
- dc-dc 3/5V on SY8208, page 38
3V has two ENs Link_ SM under Y11C

From this it follows that the signals from the KBC needed to start are S5_ON and HWPG.
Both are missing. For a fraction of a second moments after turning on the power supply, about 1.5V appears on S5_ON. I desoldered the SY 8286BRAC to check if the signals would appear, but they did not. In addition, the 5V converter stopped working then. After soldering again, the situation returned to the starting point.
I also noticed that for 0.5 seconds after pressing the power button, the white LED in the power socket lights up.

Quote:

I will add that 19V from the power supply of the converters disappears after about 2 minutes after connecting the board to the power supply

Why.?

Please tell me what layout you have
- in charger
- other systems, e.g. 1.05V power supply
Look at SM DAAX3MB16A1 how the HWPG signal is made
- pages 24, 25, 29

ps
Quanta ZHKD platform (mb board: DAZKHKDMB6E0 rev: E) same kbc
- HWPG signal shown
-SR29E N3700 CPU

Quote:

no HWPG, the result of no MAIND on the PQ4 gate, > which is dependent on the MAINON coming from the ite8987e.
- pin.80 EC_APWROK 2.4V
- pin.33 33 EC_PWROK missing
RSMRST# 3.3V
SLP_S3# 3.3V
SLP_S4# 3.3V
KBRST# 3.3V
HWPG 3.3V
EC_PWROK 3.3V

Datasheet_kbc IT8987e work application in Quanta platforms in attachment
Look carefully.



Either Bios wrong or kbc backwards or kbc dunk