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Потрошим MiniPC XULU XR1, обзор со вскрытием

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pc-expert

игровой ноутбук

msi

ремонт

00:00:01

Hello everyone, dear friends, glad to

00:00:03

welcome you to the Pisi

00:00:05

Expert channel, many people laugh when they hear

00:00:08

the phrase

00:00:09

gaming laptop, but there are no

00:00:12

gaming laptops, but I think the device

00:00:15

that is on my desk today

00:00:17

will be able to convince these people of the opposite, this is the

00:00:20

m side e75 raider 9 with g

00:00:24

which is assembled on a full-fledged 6-core

00:00:27

intel core i7 9750 processor

00:00:30

and an nvidia rtx 2080 video card

00:00:34

to feed this voracious bunch

00:00:37

in games, the kit includes a power supply of as much as

00:00:39

14 amperes, so in principle, you

00:00:43

can kill this beauty, it’s true that it’s like a

00:00:46

good used car,

00:00:48

but it’s art more precisely, toys require

00:00:51

sacrifices, but you understand that since the laptop

00:00:54

turned out to be with me, something is

00:00:56

wrong with it and it needs help, and as

00:01:00

it turned out, it broke down through no fault of its own, the

00:01:03

classic situation began in Greece,

00:01:06

they cleaned the dust without removing the battery,

00:01:09

they got a brick and in In our case, it’s also

00:01:12

a shame that the brick is very expensive,

00:01:14

well, there’s no point in connecting the power now,

00:01:17

so we’ll immediately

00:01:19

disassemble and carry out diagnostics,

00:01:22

remove the back cover, yeah, and here’s the connector

00:01:26

that the subscriber confused with connector a

00:01:29

to b, we won’t repeat this with you, and

00:01:32

that’s why I I immediately unscrew the screw

00:01:34

holding the battery and remove it, and now the

00:01:37

board is definitely completely de-energized and you can

00:01:40

safely disassemble it further without fear of

00:01:42

shorting something and damaging it. After

00:01:55

removing the raft from the case, first

00:01:58

of all we carry out a visual inspection of the

00:02:00

board platform m with 16 p 71 and the

00:02:04

documentation is freely available on it

00:02:06

Of course, we can’t find it,

00:02:08

but I think today we won’t

00:02:10

need it. First of all, let’s inspect the

00:02:13

condition of the crystals of expensive

00:02:19

hop sr 40 b chips; ideally, the n18 g31 video chip is

00:02:41

also externally without any damage, and

00:02:45

[music]

00:02:48

with the sr ftsp processor,

00:02:51

things are worse in one of the corners are

00:02:54

clearly visible, such a good chip, how

00:02:58

critical it can be, I don’t know yet, but

00:03:01

its presence needs to be remembered, otherwise the

00:03:03

board is in perfect condition,

00:03:08

I did not find any traces of repairs, flooding or outside interference,

00:03:10

however, you and I know that

00:03:13

there was interference after all

00:03:15

The laptop stopped turning on, so we got

00:03:18

the multimeter in hand and started diagnostics,

00:03:25

but we were immediately met with a broken 1

00:03:29

input key 2, which seemed to be intact, but at its

00:03:33

output, but also in the measuring resistor

00:03:35

pr 269, a

00:03:37

short circuit to ground was detected,

00:03:39

there are two options, or we’ll be lucky

00:03:42

and on the board you will find some

00:03:44

broken ceramic capacitor at 19

00:03:47

volts, or you’ll be unlucky and 19 volts will go

00:03:50

through a broken top switch to

00:03:52

some of the power supply. To find out,

00:03:55

measure the resistance on all

00:03:58

large chokes of the board relative to the

00:04:00

ground,

00:04:14

both lines of the standby power supply are kilo-ohms and the hub

00:04:16

power supply is excellent. 44th and the normal

00:04:22

power supply of the RAM is about 80, it

00:04:26

will also use another power supply, I don’t know what

00:04:30

it is,

00:04:31

but it’s not kilo-ohm, I’m quite

00:04:33

satisfied with the power supply of the core of such a

00:04:36

powerful video chip with a multimeter, it’s

00:04:38

useless to measure it, it has a very low

00:04:41

half-ohm resistance, taking into account the

00:04:44

resistance of the probes themselves, maybe it is

00:04:46

quite acceptable to

00:04:54

supply video memory with 32 ohms;

00:04:57

processor logic is 55 m and 20; everything is fine here,

00:05:21

but the resistance of the processor core power supply

00:05:23

in the 1st makes you

00:05:25

wary of the power supply to the graphics

00:05:28

core of the processor; the order and so of all the

00:05:33

power supply are low resistances close in

00:05:35

value to what we we have 19

00:05:37

volts each for the processor and video chip, now let’s

00:05:41

look at the resistance value

00:05:43

directly between the 19 and volt

00:05:45

line and the power supply and on the

00:05:47

video chip that came under suspicion, the multimeter

00:05:50

shows a resistance of 1 point two

00:05:53

tenths of an ohm, but to the power supply of the

00:05:56

processor core the lines ring short,

00:05:58

very sadly, this means exactly this The

00:06:02

power supply has broken through the upper

00:06:04

side transistor, or rather one of the SIC 631 roads.

00:06:08

Now we need to find out which of the

00:06:11

three microcircuits is faulty. The lbp method with

00:06:15

voltage supply in this case will be

00:06:17

absolutely useless and maybe even

00:06:20

harmful, what if the processor still survives,

00:06:23

although I believe it with great difficulty,

00:06:26

the method of scientific poking with evaporation of

00:06:28

microcircuits in turn, I also don’t really

00:06:31

like it, so you and I will do it differently;

00:06:33

faulty microcircuits are not

00:06:37

necessary, of course, but the readings may differ

00:06:39

from the others, and after making

00:06:42

measurements and comparisons, I discovered a difference

00:06:44

of 7 legs on the face signal on the microcircuit

00:06:48

under positional designation 15,

00:06:51

the resistance is 590 and on

00:06:55

all other microcircuits the

00:06:57

resistance corresponds to this power phase, everything

00:07:00

falls into place, there is a break inside the

00:07:03

face line microcircuit, therefore

00:07:06

there is a break in the bootstrap chain, therefore

00:07:09

we get a breakdown of the upper key,

00:07:12

our assumption can be confirmed

00:07:15

only by removing the suspected obscenity

00:07:17

controller SIK 631

00:07:19

with positional designation 15 each and

00:07:22

I will do this with a hairdryer and

00:07:24

preheat the entire board on a

00:07:26

thermal table since the PCB here is

00:07:29

quite thick and heat-capacious, but to

00:07:32

install the board on the soldering station, but without

00:07:34

removing everything that could be damaged by

00:07:36

heating, let’s do this then, using

00:08:04

heated soldering, the microcircuit is removed

00:08:06

in literally a few seconds and let’s

00:08:09

immediately check it and check that it hits on the first

00:08:14

try, the 19 volt input is broken into the

00:08:17

power phase, you need to change it, as it turns out, I

00:08:21

don’t have SIC 631 microcircuits in stock,

00:08:24

but I do have SIC 634, no matter how hard I tried

00:08:29

to find the difference Between them in the datasheets,

00:08:31

I couldn’t do this. According to the

00:08:34

documentation, it turns out that these are complete

00:08:36

analogues, why then the markings are different,

00:08:40

I personally didn’t understand if someone can

00:08:42

explain this in the comments, I’ll be

00:08:43

happy to read it, and while the board is

00:08:46

heated, we’ll immediately start installing

00:09:14

[music]

00:09:22

once -two and you’re done, now let’s

00:09:26

see how the readings on the board have changed

00:09:30

[music] the

00:09:36

resistance at 19 volts has returned to

00:09:39

normal; the 1st one, as expected, remains powering the

00:09:42

processor core and 7 pins of the microcircuit,

00:09:50

15 each, now everything is fine; the

00:09:53

phase line is not broken, yes we have on the

00:09:57

board there is also 1 input switch broken, this is sm

00:10:00

4309 p, having looked at its characteristics, I was

00:10:05

surprised to find a p-channel switch for

00:10:07

100 amperes, it’s been a long time since I’ve seen

00:10:11

channel mosfets in laptops,

00:10:13

stop why do they still have channel

00:10:16

mosfets

00:10:17

controller charges bull 24 780 s is

00:10:21

designed to work with n channel ones, but

00:10:24

as it turned out, the

00:10:25

engineers ourselves decided to come up with a

00:10:27

bicycle on this board; the charger does not

00:10:29

control the input keys; the 4th leg of

00:10:33

the controller is simply not connected anywhere;

00:10:36

the control is receiving a signal from the amis multi

00:10:38

controller, so we sorted it out,

00:10:41

but the mosfet is suitable in terms of power

00:10:44

I’m still not there, I think you can temporarily

00:10:46

leave the faulty one on the board since

00:10:49

it has a broken source-drain junction,

00:10:51

it will simply play the role of a jumper

00:10:54

with other working power systems,

00:10:56

this should not play any role,

00:10:59

now you can also connect the power supply to the board,

00:11:02

by the way, the connector here is not

00:11:05

Asus’s as on most laptops

00:11:07

and for the most part, this time it was borrowed

00:11:10

from old devices and

00:11:11

Elidel again, I didn’t understand why it was

00:11:15

necessary to use a three-pin

00:11:17

connector with a needle

00:11:18

if the central contact was not

00:11:20

used anyway, but the engineers and the Cape

00:11:23

obviously have their own special view on the

00:11:25

development of devices Well, or in the

00:11:27

office next to them, Asus engineers work, and

00:11:31

so we connect a typical connector to the

00:11:34

dress from the laptop and the mass and immediately from the

00:11:37

consumption you can understand that so far everything

00:11:39

is fine,

00:11:40

the board even responds to the power button,

00:11:43

for a split second the consumption appears at

00:11:46

just under 200 milliamps and then

00:11:48

obviously the protection is triggered and

00:11:51

it is triggered by the power supply of the

00:11:53

processor when you press the power button

00:11:55

on the oscilloscope, you can clearly see the attempt to

00:11:58

start all phases, including the one

00:12:00

we restored, but as I

00:12:03

expected, the processor was unable to digest the

00:12:05

19 volts supplied to it and

00:12:07

went to another world; there is a

00:12:10

processor installed on the board with the marking sr

00:12:13

ftsp

00:12:14

this is also 797 50 h and to be honest, even before

00:12:19

sending the laptop to me for repair there were

00:12:21

strong suspicions that the processor

00:12:23

would be faulty when the suspicions

00:12:26

were confirmed and I started looking for a processor

00:12:28

to buy, it turned out that this was not the

00:12:31

case and

00:12:32

the customer even offered to order it

00:12:35

pillar, but such expensive chips need to be

00:12:38

bought only in trusted places, and

00:12:41

fortunately I managed to do this. I

00:12:43

would like to express my deep gratitude for

00:12:46

this to my partner from Novosibirsk, the

00:12:48

store and floor,

00:12:49

they have been

00:12:52

supplying components for

00:12:54

laptops for many years and very often you can find

00:12:56

microcircuits there and chips that are not available from other

00:12:59

sellers,

00:13:00

today’s case can serve as a vivid

00:13:03

example for all repairmen who were not

00:13:06

familiar with IT, I will leave a link in the

00:13:08

description under the video

00:13:10

before doing anything with the received

00:13:13

processor, you and I need to

00:13:14

check it first of all, a visually-

00:13:17

eyed viewer can notice that the

00:13:20

markings of the processors are different in the

00:13:23

native one it was sr ftsp and I came with rs6

00:13:28

but in fact it is the same

00:13:30

processor the difference in markings

00:13:32

is explained only by the difference in the degree of

00:13:34

hydra look further on the

00:13:38

processor crystal there is no damage visible let's

00:13:40

look at the reverse side

00:13:47

yeah a

00:13:48

small mistake but it’s not scary

00:13:52

because in any case, will

00:13:53

the processor hurt the lead balls? When the

00:13:56

visual inspection is passed, you need to

00:13:58

make initial measurements at the control

00:14:00

points for obvious problems with the

00:14:03

signals, everything is fine here too, which means you

00:14:07

can proceed to reballing, apply flux and

00:14:10

first with a soldering iron and then we

00:14:13

remove the old balls with a whip,

00:14:18

then we clean everything from the remnants of the

00:14:20

used flux; if you wish, you can

00:14:25

manually install several balls in the

00:14:27

corners of the chip, these glasses of mine will make it easier and

00:14:30

more accurate to install the stencil, then we apply

00:14:34

the flux; there

00:14:35

should be exactly as much flux as

00:14:37

needed if there is not enough balls are not

00:14:41

soldered to there is too much for the chip and when it

00:14:44

heats up it will begin to push the balls out of the

00:14:46

stencil so as they say everything is good in

00:14:49

moderation, the stencil in place can be poured into the

00:14:56

balls, as always, half of it

00:14:59

wakes up past the collection ball, well,

00:15:01

okay, I don’t mind at all, everything is in

00:15:07

its place, you can melt it

00:15:16

ready now After waiting for the solder

00:15:19

to harden, we remove the chips with a stencil and with a

00:15:22

holder,

00:15:23

but in no case should you immediately

00:15:25

try to remove the stencil on a cooled chip,

00:15:27

otherwise there is a high probability of tearing

00:15:30

it off along with the nickels, set the hair dryer to

00:15:34

200-250 degrees and again warm up

00:15:37

the chip a little to soften the frozen flux in this

00:15:39

way certainly nothing will be

00:15:42

damaged after removal, several balls are

00:15:45

not soldered, but it’s okay, they

00:15:48

can be soldered manually, and here’s what the

00:15:52

final version of the processor, ready for soldering, looks like.

00:15:56

Now all that’s left is to remove the

00:15:58

factory glue from the board around the faulty chip

00:16:00

and transfer it with the board to the

00:16:02

soldering station, here it’s all like I always

00:16:06

apply flux,

00:16:07

we install a thermal sensor, the diaphragm at the

00:16:11

top heater really needs to be

00:16:12

changed, I set it to the widest option and

00:16:15

start the desoldering process

00:16:18

[music] the

00:16:22

board chips are ready, the board chips are removed, removing the remaining

00:16:25

solder from the board with a soldering iron with a wide tip,

00:16:28

and today

00:16:31

I will not use the braid for final cleaning of the board,

00:16:33

instead I will go for a walk on all

00:16:35

contacts with lead solder to

00:16:38

facilitate the process of installing a new

00:16:40

processor,

00:16:51

it is advisable to cover the crystal of the new chip with a piece of aluminum

00:16:54

foil before soldering, which reflects well and emit

00:16:56

radiation.

00:17:12

Now you just have to wait until the board

00:17:15

cools down. I strongly do not recommend using forced cooling when soldering

00:17:18

such processors;

00:17:21

let the board cool down naturally

00:17:32

before startup, let's see how the

00:17:34

resistance of the processor power core has changed,

00:17:38

well, there are more than three, but this is a completely

00:17:41

different matter, and for all other power supplies,

00:17:48

everything is also in order

00:17:56

[music]

00:18:05

I immediately replaced the

00:18:07

cooling system and connected the dress matrix, well, there are

00:18:21

switches from the screw and look what a

00:18:24

good appetite the laptop has: 3 amps

00:18:27

eats without any load at all, and

00:18:29

what we have on the matrix

00:18:39

is a great picture. All that remains is

00:18:43

to replace the broken input mosfet

00:18:46

so that everything works as expected and you can

00:18:48

assemble the device. When assembling, you need to

00:18:52

pay special attention to the cooling system.

00:18:55

The laptop came to me without any

00:18:57

thermal interfaces at all, so

00:18:59

they will have to be restored from scratch; in this case, it

00:19:02

is necessary to take into account the

00:19:04

different heights to the cooled

00:19:06

components; if on the

00:19:08

video chip components the gap is minimal, then on the

00:19:11

processor power system there is such a good

00:19:14

gap, well, let's go to the chip crystals,

00:19:19

of course there is arctic thermal paste

00:19:20

cooling,

00:19:21

and it

00:19:25

takes a very decent amount of cooling

00:19:27

for the entire system to supply its power to the huge 2080 video chip. I

00:19:30

finally apply the liquid thermal pads that were traveling before me, and

00:19:32

again,

00:19:35

they need to be applied in this way, with a

00:19:37

slide in the center, cooling into the new

00:19:40

element when installing the

00:19:42

cooling system in place the entire gap must

00:19:45

be filled and the excess must be squeezed out at the

00:19:47

edges; when installing, the screws must be

00:19:50

tightened in a strict order,

00:19:52

and in order to avoid distortion and,

00:19:55

accordingly, chips on expensive

00:19:57

components, you never need to immediately

00:19:59

tighten the screws to the end;

00:20:02

you need to tighten them carefully and gradually;

00:20:04

and I installed the original ones on the processor power supply system

00:20:07

two

00:20:09

millimeter Keraterm thermal pads

00:20:11

that they send me directly from

00:20:13

Germany with a thermal conductivity of 6 watts per

00:20:16

meter per kelvin, but here’s what the

00:20:18

correct installation of liquid

00:20:21

thermal pads should look like. Now you can proceed to

00:20:23

testing in the

00:20:26

device manager, everything is fine; the processor has two

00:20:29

video cards; I’ll immediately check

00:20:32

the performance of four brands rtx 2080 yes, it’s not

00:20:37

bad,

00:20:38

I haven’t seen such fps on laptops yet,

00:20:41

well, it works and well,

00:20:44

no work was done with the video card, but

00:20:47

what about the processor we have there, the owner of the

00:20:49

laptop complained about overheating, which is

00:20:52

why the whole story is actually

00:20:53

how we started, well at rest,

00:20:57

the temperature is more than adequate, just

00:20:59

above 50 degrees, and if

00:21:02

you wait a little and drop to 40,

00:21:04

but you just need to run the test

00:21:08

[music]

00:21:12

calves, the temperature is a hundred degrees

00:21:16

topping, is there really something wrong with the processor, well,

00:21:24

at least one plus, now we know for sure

00:21:27

that turbo boost processor works,

00:21:30

there was only one unresolved traditional

00:21:32

question: who is to blame for this and what

00:21:41

should we do? The answer turned out to be as simple as an orange; these laptops are supposed to work that way;

00:21:43

unfortunately, in our time, marketers are

00:21:46

much more important than engineers and, in pursuit of

00:21:48

trends, they release these to the market

00:21:50

stuff the products into a thin

00:21:53

laptop case, a hot six-core

00:21:56

processor and an equally hot

00:21:58

video card, please, how will all this be

00:22:00

cooled, who cares,

00:22:03

the warranty period works well, okay,

00:22:06

but a thin gaming laptop is cool, in

00:22:10

fact, of course not, of course you can

00:22:14

do it underworld young Well, that is,

00:22:16

programmatically lower the voltage on the

00:22:18

processor so that the cooling system can at

00:22:20

least cope with all this,

00:22:22

and you can even find a guide on

00:22:25

this operation on YouTube, but seriously buy a

00:22:28

gaming laptop for 200,000 so that later

00:22:30

you can think about why the manufacturer didn’t think of it,

00:22:32

by the way, when I accidentally in

00:22:35

the search I came across the cooling system

00:22:37

from this device, when I saw the price I felt

00:22:40

sick again and you also ask

00:22:42

why I’m already turning gray here with

00:22:45

such prices

00:22:46

this whole situation is beyond my understanding

00:22:49

if you can explain something to me

00:22:52

I invite everyone to comment one way or

00:22:55

another My task as a repairman is to bring

00:22:57

the laptop back to its original factory

00:22:59

working state, which is what we

00:23:02

did today,

00:23:03

and since there’s nothing more to do today, I

00:23:06

’ll say goodbye to you,

00:23:08

but of course not for long. Many thanks

00:23:11

to everyone for watching, as always, until the

00:23:13

next repair

Description:

Огромный выбор запчастей для ремонта ноутбуков: https://www.aitech1.ru Сегодня мы с вами пощупаем по-настоящему игровой ноутбук MSI GE75 Raider с процессором Intel Core i7-9750H и видеокартой Nvidia RTX2080, который погиб во время чистки системы охлаждения. Виноват ли в этом тот, кто занимался чисткой? Оказалось только отчасти... Мой телеграмм-канал: @pcexpert86 Группа в контакте: https://vk.com/lpcexpert Instagram: pcexpert86 Чтобы отправить ноутбук на ремонт, пишите: ВК - https://vk.com/pcexpert86 Почта - [email protected] Купить видеокурс по ремонту ноутбуков - практическое руководство: https://plati.market/itm/video-course-on-laptop-repair-practical-guidance/2430229 Почитать отзывы можно в комментариях: https://www.youtube.com/watch?v=AFFx_RU-xNM Первая часть видеокурса по ремонту ноутбуков: https://plati.market/itm/video-training-on-repairing-laptops-by-pc-expert/2164831?lang=ru-RU

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