Мертвый Павильона DV6 (QUANTA UT3)

Здравствуйте,

настоящая ситуация походит на это:

5vPCU ПРАВИЛЬНЫЙ
3VPCU ПРАВИЛЬНЫЙ
NBSWON1 * ПРАВИЛЬНЫЙ
ПРАВИЛЬНЫЙ DNBSWON*1

ЧТО я ДОЛЖЕН ПРОВЕРИТЬ ЗАТЕМ?

SUSON, MAINON, S5_ON, SUSB *, SUSC * ВЕСЬ 0V


DV6 Pavillion dead

Hello,

present situation is like this:

+5vPCU CORRECT
+3VPCU CORRECT
NBSWON1# CORRECT
DNBSWON#1 CORRECT

WHAT SHOULD I CHECK NEXT?

SUSON, MAINON, S5_ON, SUSB#, SUSC# ALL 0V (no change at pressing power button)

PLEASE GUIDE ME

THANKS

What type of EC is in laptop - KB3920 or KB3926?
Please don't write "CORRECT"!!! You will write absolute value, i. e. "+3VPCU=3.2v" or "DNBSWON#1 shortly falls to zero after pressing power botton", etc.
The next is for EC KB3926.
For the good start the signals of EC will be next:
+12V_ALW = 12v
5VPCU = 5v
the next signals will be
9, 22, 33, 67, 96, 111, 125 3VPCU
037 3920_RST#
127 LID_EC#
086 ACIN (ACIN_1)
095 RSMRST#
all about 3.2v
Y2, Y6 (32.768KHZ) should oscillate

If everything above is all right, what occure at next circuits after pressing power botton? (before pressing\after pressing)
075 DNBSWON (DNBSWON#1) - ?\?
016 SUSC# - ?\?
006 SUSB# - ?\?
098 SUSON (SUSON_1) - ?\?
099 MAINON (MAINON_1) - ?\?
101 S5_ON (S5_ON_1) - ?\?
034 VRON - ?\?
014 HWPG - ?\?
076 ECPWROK - ?\?

Dear sir,

Thanks for sparing some time. EC is indeed KB3926. good guess.

now some voltages:

DC jack = 19.93V
+VA = 19.90V
+VAD = 19.71V
+VIN = 19.71 V
+5VPCU = 5.25V
+3VPCU = 3.45V
+12VALW = 8.70V

+12VALW SEEMS TO BE OVERLOADED. SO I HAVE NOT MEASURED ANY FURTHER VOLTAGE.

PLEASE GUIDE WHAT SHOULD I MEASURE NEXT??

FORGOT TO WRITE

+5VALW = 5.25V


NOW TRYING TO LOCATE THE CIRCUITS USING 12V BUS

PLEASE GUIDE ME FURTHER

THANKS A LOT ONCE AGAIN

It may be not important for the start.
Please check other signals from the list...

P.S. Have you oscilloscope?

P.P.S. Please leave the Caps Lock.

Dear Sir,

Hello again !!

First of all, I apologise for using CAPS.

Although i dont have an oscilloscope, but can a divide by n counter be used to check oscillations?

I will measure the Voltages at EC and report you back. Its very hard to measure the voltages at its crowded pins.

Thanks again for your excellent guidance

It's not good...

I do'nt know... Try to check...

It's very simply if you use thin pointed probe like needle. Please do'nt short-circuit between the pins!

Hello,

Just adding some information as desired by you...

For the good start the signals of EC will be next:
+12V_ALW = 12v
5VPCU = 5v
the next signals will be

Voltages At EC (KB3926)

9, 22, 33, 67, 96, 111, 125 (3VPCU) = 3.4V
037 3920_RST# = 3.3V
127 LID_EC# = 3.25V
086 ACIN (ACIN_1) = 3.1V

095 RSMRST# = 0V (LOW)

all about 3.2v, Y2, Y6 (32.768KHZ) should oscillate

I Have Not Checked the oscillations yet . Waiting to know the possible cause of this low resume reset voltage (RSMRST)


If everything above is all right, what occur at next circuits after pressing power button? (before pressing\after pressing)
075 DNBSWON (DNBSWON#1) - ?\?
016 SUSC# - ?\?
006 SUSB# - ?\?
098 SUSON (SUSON_1) - ?\?
099 MAINON (MAINON_1) - ?\?
101 S5_ON (S5_ON_1) - ?\?
034 VRON - ?\?
014 HWPG - ?\?
076 ECPWROK - ?\?

[/quote]It's very simply if you use thin pointed probe like needle. Please do'nt short-circuit between the pins![/quote]

Dear sir,

Thanks for the tip.
What does this low rsmrst signal mean? what is the remedy for it?

Looking forward to an early reply,

Thanks in advance

095 RSMRST#
It is "Reset" from EC to South Bridge. The low state of rsmrst means that SB is in reset state.

That's all right.

For the most of Quanta platforms RSMRST#="high" after standby power is up. (But it possible that RSMRST# should be "high" after pressing Power Botton!)
You are wrote:

What is it means ("CORRECT")?
Is it means that
019 NBSWON1# falls to zero by pressing power botton
075 DNBSWON (DNBSWON#1) shortly falls to zero after pressing power botton
???
The possible cause of this low reset voltage (RSMRST) should be:
1. Damaged bios (please make backup and try to flash the bios)
2. Damaged EC (try to replace by new one)
3. Damaged SB (try to replace by new one)
4. Other case...
You may to do "1" but "2-4" do after more diagnose...
Please send the results:

And you will check the Y2, Y6 (32.768KHZ) oscillations, if it possible!!!

Dear Sir,

Sorry for my ignorance but frankly speaking, i am new to this world where you are the master........ and i dont have any idea how to flash the bios.

i have tried to google it but everything there is for a working mortherboard. I dont have anything like EEPROM programmer like thing for bios chips. Being an electrical engineer, i know very little about programming bios chips.

Could the 3V cell be the problem? You said in some rare cases, the rsmrst may be low until we press the power button.......... that gives me some hope.......

sir, i will once again check the voltages when i go back to home again and report you . It needs two people to measure the voltage on EC. I hold the magnifying glass near to the EC and put the needle on the pin and the other person notes down the voltage ... i just cant shake my head or else i will short the pins. .

Its my good fortune that i have met you and have learned this much from you in such a short time....... you are simply great .

The forum doesnt allow me to give hundred points to you in one go, so i have to contend with +1 always...

Thanks again.

O-o-h, thank you very much!
It is not need... These points are only for notify. I need only one of these, it is enough!

Repairs of laptops it is not easy. You need a lot of professional tools and skills...
Good luck!

Dear Sir,

I fully understand that laptop repairing is not that simple but just because you are my guide, i feel so secure. thanks .

I have measured some voltages (Before / After):

019 NBSWON#1 3.4 / 0V

090 DNBSWON#1 3.4 / falls to 0.2V gradually rises to 0.5V and settles there

95 RSMRST# 0V / 2.8 V (for half a second when you press the power button) and then falls back to 0V

still could not measure the oscillations.
also did not try measuring suspend voltages (susc, b etc) because i guess something is faulty here itself.

As always, looking forward to your reply with a million thanks in advance

I try to explain...
For good start of laptop you must have:
100% good Processor
100% good RAM Memory Module
100% good Power Adapter

Before pressing Power Botton the signals of EC will be next:
9, 22, 33, 67, 96, 111, 125 3VPCU
037 3920_RST#
127 LID_EC#
086 ACIN (ACIN_1)
095 RSMRST#
all about 3.2v
Y2, Y6 (32.768KHZ) should oscillate

After pressing Power Botton the following events occur:
EC initializes power up all of power supplies and initializes all bridges of laptop.
1. Sets the RSMRST# to High (removal reset state of South Bridge and sets active state of South Bridge)
2. Sets the DNBSWON#1 shortly to Low then back to High (init the South Bridge)
Then the South Bridge sets the 016 SUSC# 006 SUSB# all to Hihg for EC.
Also EC sets to high next signals: 098 SUSON, 099 MAINON, 101 S5_ON, 034 VRON for power up.
If all of power supplies working correctly, EC gets Power Good (PG) from them: 014 HWPG to High.
Then EC sets 076 ECPWROK to High, and CPU executes the bios commands (you will see postcodes at postcard).

If only one of listed condition from all not true, EC should removed all active states and signals!


So, EC try to init SB but stops the process.
This may be caused by next reasons:
1. Damaged bios - but you not have programmer.
2. Damaged SB - but you not have oscilloscope for testing.

You need measure the oscillations and check the powering of SB (page 24 - ICH9-M Power).
Please check the 016 SUSC# 006 SUSB# at least - if they try to high, the SB may be good.
3. Other case.
For example, any of power supplies gives wrong voltage...

You need check all of signals listed above!
Thereafter you need check voltages of all power supplies are triggered by these signals (See the schematics).
Then you may try to think logically...

Dear Sir,

Thanks for your detailed explanation. It was a great help to me as always. thank you very much.

I have measured the voltages on the bios and they don’t seem to be all right.

BIOS ( U22 sheet no 34)
Pin no. name voltage
1 BIOS CS# 0.18 V
2 BIOS RD# 1.64 V
3 SPI 3P 3.4 V
4 VSS 0 V
5 BIOS WR# 0.25 V
6 SPI CLK 1.5 V
7 SPI 7P 3.4 V
8 VDD 3.4 V

I guess the voltage at pin 1 is very low. Shouldn’t it be 1.2 to 2.5 V? If that is the case then the EC seems to be faulty . As you said earlier, EC should get 3.3V + oscillations + ECRST signal to give out about 1.5V at BIOS CS#. Since the BIOS is not getting enough supply at its CE# (pin 1), can EC be faulty?.

I am not sure about the oscillations but its getting supply and ECRST to work. Is there any other way to check oscillations without frequency meter or oscilloscope? What can cause the oscillator not to work ? any likely component?

Sir, I have also check the suspend voltages before and after power button as follows:

Pin no. name voltage
16 SUSC# 30 mV / 275mV again falls to 30 mV
06 SUSB# 30 mV / 550 mV again falls to 30 Mv

Sir, regarding the logical analysis of various power supplies, I need to know the logical sequence of the power supplies. The order in which they switch on is unknown to me. Please guide me more about this.

Thanks a lot for your efforts and valuable time.

Thanks a lot Sir.

I do not think so. I think EC working about 80%, but I'm not sure. As EC responds to pressing the Power Button that oscillator is working.
(Notification. I wrote "Y2, Y6 (32.768KHZ) should oscillate" but at other shematic it can be Y4 for EC, Y7 for SB.)

Oh, it is so difficultly...
There is page "Power Sequence" in some laptop schematics. This page contained all information about logical sequence of the power supplies. But not in Quanta...
You will get the information from the schematic by logical analyze.

You need found all the power supplies at schematic is connected with the signals and to analyze they condition using datasheets of them. For example, SUSON go to pin 11 (S5) RT8207. From datasheet RT8207 you know: all outs of RT8207 (VDDQ, VTT) is full ON if pin 11 (S5) is High and if pin 10 (S3) is High. Then all outs is full ON if SUSON and MAINON are High, etc... Understand?

There are two different type of signals in electronics: static and dynamic.
You may measure the static signals by multimeter, not the dynamic signals. For the measurements of dynamic signals, for the checking of oscillations, etc. - is intended the oscilloscope.
Without the special equipment you can not repair laptops!
If you will practice the repairing in the future you must purchase the oscilloscope, the programmer, the soldering station, etc... It is very expensively but is necessary. Understand me?
If you will not practice the repairing in the future you will go in Repairing Service for help...

You has done the great work but it is not contained any information, because these signals are dynamic.
When I have no information then I ask a spirit... I do not see that there occurs, therefore I can not give advice to you.
Without the special equipment you can do the next: replace the CPU, Memory, Power adapter by the same in working condition and measure the static voltages. That's all of you can only.
Good luck!

And sorry for my poor English...

Dear sir please dont embarrass me by saying that........ you have an excellent command over english and more importantly, the laptops.

Sir,
you said the EC seems to be working. Lets assume the y4 (32.768KHz) oscillations are there. then what should i check?

I found the power -on -sequence timings in this order:

S5_ON
RSMRST#
SUSB#, SUSC#
SUSON
MAINON
VSUS, VCC
and so on.......

IF the EC is ok then which supply should i check ??

Sir, I understand the importance of measuring instruments, but due to their cost and me not being a professional, I can not afford them. I am just trying to find the fault by your experience. I hope you will continue to guide me.



Thanks

You have to understand the very important thing: without equipment you can not do anything. My experience does not replace the measurements. I can explain to you the Power Sequence, but you can not check the signals! They are dynamic, the multimeter is not intended for these measurements. You will wasting your time…
The repairs laptops is not for amateur, it is professional activity. This is so, sorry. I want to help you, but I can not...
Good luck!

тагансити, терпеливый

. ......сразу видно, человек ( тагансити ) в школу ходил...и не только...
...Жесть....

Спасибо, Дядя Женя!

дядьмиша
Угадал!
Английский из школьного курса + общение с наЕбэевцами. Решил вот поупражняться, пользуясь случаем...

I wish that means there is a way out...........

But on a serious note, i must thank you for your time and dedication shown. i just can not describe that in words. and i fully understand its like groping in dark without the proper scope.

I gained a lot from your answers and it was a wonderful experience interacting with you. thanks alot sir.

god bless you.

Thanks for the wish. I wish you the same. And good luck!