Razer Blade RZ09-01953 no power

[Themi]

Hi all

I’ve got a Razer Blade 2017 RZ09-01953 with no power.

I’ve done some multimeter reading and attached them in an image below.

I’m aware I should be getting 3.3v and 5v at the two big coils/high power resistors (?) at bottom of the image near the DCIN connector but I have no voltage there at all.

There’s continuity across all of the white board fuses

Could anyone help me diagnose what could be wrong here.



Happy to provide further readings / images.

Many thanks

[dellxps15]

Re: Razer Blade RZ09-01953 no power

read volts on blue marked zone... also the 4th pin of that mosfet (gate)


without power in diode mode check value on 4.5volt point, possible on first mosfet after 19v input.

[Themi]

Re: Razer Blade RZ09-01953 no power

without power in diode mode check value on 4.5volt point, possible on first mosfet after 19v input.

Can you explain this part to me again or visualise in drawing?

Here are the other measurements

[Themi]

Re: Razer Blade RZ09-01953 no power

Like this?

[Themi]

Re: Razer Blade RZ09-01953 no power

Ok I think I measured the mosfetts the wrong way round.

Here’s the updated readings

[dellxps15]

Re: Razer Blade RZ09-01953 no power

black probe on gnd (ground) metal of usb or so on and red on pin (all without power connected

taht mosfet.... first reply u measured... can u read it's code ?




that one black on gnd red on pin 1-2-3 and 4

look also for mainboard code... so we can search for schematic


edit: 0.47 volt output make me think of a shorted capacitor... do you have lab psu ?

[Themi]

Re: Razer Blade RZ09-01953 no power

Ok so codes from the board are:

RZ09-01953W71-R3W1
B6 NT

BETTY R6_MB
20161227
20161228


Codes from both mosfetts (both the same)
3R030
PEm
1638 C6
1772


When I measure with no power to board and multimeter in diode mode, black probe to ground and red probe to each pin 1, 2, 3 then 4 on both mosfetts I get same readings for each mosfett.

Starts at between 0.7-0.9v climbs gradually to 1.98v then displays .OL

[Themi]

Re: Razer Blade RZ09-01953 no power

https://youtu.be/UHTMc8BQaYQ

This is what I get for each pin on both mosfetts

[dellxps15]

Re: Razer Blade RZ09-01953 no power

try program ec chip..... first save original (read chip then save)

[Themi]

Re: Razer Blade RZ09-01953 no power

try program ec chip..... first save original (read chip then save)

To confirm

It is this one?

[Themi]

Re: Razer Blade RZ09-01953 no power

Ok so have just found this video. Same model as mine.

At 4:50 he checks the voltage at the top mosfet. He appears to be getting 20v whereas I’m getting 4.5v. I’m guessing I have a problem around here in the circuit ?

[Themi]

Re: Razer Blade RZ09-01953 no power

Removed these two mosfets today and found the left one to be faulty going through various off board tests

[dellxps15]

Re: Razer Blade RZ09-01953 no power

can u check now voltage on that red spot without the mosfet ?
also if u suspect the second one to be fault, can u solder back right one (only that )and check pin volts ? pin 1-2-3 should have 19 volt and pin 4 should be near 8 volt.

[Themi]

Re: Razer Blade RZ09-01953 no power

can u check now voltage on that red spot without the mosfet ?
also if u suspect the second one to be fault, can u solder back right one (only that )and check pin volts ? pin 1-2-3 should have 19 volt and pin 4 should be near 8 volt.

mosfet pads closest to DCIN
4.6v at the red pad (gate)
0.655 at pads 1, 2 and 3 (source)
19.52 at large pad (drain)

mosfet pads furthest from DCIN
4.59v at the red pad (gate)
0.655 at pads 1, 2 and 3 (source)
4.25-4.52 (fluctuating) at large pad (drain)

from all my tests on the mosfet yesterday the good one appeared to pass but I'm not 100% sure on the values vs what it was designed at. Hopefully tomorrow I'll receive new ones so I'll solder the one closest to DCIN first and check values then reattach the other one.

Possible something else is wrong ?

[Themi]

Re: Razer Blade RZ09-01953 no power

I have found gate pad from mosfet closest to DCIN goes through board and comes back to this IC here.

I haven’t checked what it is yet but will investigate further




from what I can find this is some sort of battery charging IC

if this was faulty could this affect the voltage I am seeing on my mosfets?

https://www.avnet.com/shop/emea/prod...7345631220627/

[dellxps15]

Re: Razer Blade RZ09-01953 no power

no it wont affect. if we have schematic, we could see resistor value for pin 4 of first mosfet to see if they are ok.

[Themi]

Re: Razer Blade RZ09-01953 no power

no it wont affect. if we have schematic, we could see resistor value for pin 4 of first mosfet to see if they are ok.

yes very difficult without schematics :/
I can see both gate pads for each mosfet trace back to this IC 95520HRZ

100% sure it won't affect?

I have seen seen a few repairs where people have replaced a 'controller' chip which frequently fails but unsure if it is this one as IC appears to handle battery charging

[Techtiger]

Re: Razer Blade RZ09-01953 no power

if you are sure of the chaging IC is ISL95520HRZ then test pin 1 2 30 31 32 ACIN is pin 1 (+19V) & GATE PASS is pin 30(+20-25V) your fist 2 FETS are N-CHANNEL what are the Reading of the 2 fets S G D ? dont remove components if you are not sure for father damage !

[Themi]

Re: Razer Blade RZ09-01953 no power

if you are sure of the chaging IC is ISL95520HRZ then test pin 1 2 30 31 32 ACIN is pin 1 (+19V) & GATE PASS is pin 30(+20-25V) your fist 2 FETS are N-CHANNEL what are the Reading of the 2 fets S G D ? dont remove components if you are not sure for father damage !

When mosfets were attached to board these were the values:

mosfet closest to DCIN
D - 19.52v
S - 4.3v
G - 4.25 - 4.52v

mosfet furthest from DCIN
D - 4.25 - 4.52v
S - 4.5v
G - 4.25 - 4.52v

Removed both mosfets from board and found mosfet furthest from DCIN is faulty after testing with diode mode on multi meter.

I have traced from DCIN to ISL95520HRZ and can confirm is an ISL/Renesas Hybrid Power Boost (HPB) and Narrow VDC (NVDC) Configurations Combo
Battery Charger With SMBus Interface from this data sheet:

https://cdn.badcaps-static.com/pdfs/...67c4a6f163.pdf


To confirm, is red or blue pin 1?
Do I count pins counter-clockwise?

[Spider1211]

Re: Razer Blade RZ09-01953 no power

To confirm, is red or blue pin 1?
Do I count pins counter-clockwise?

Red is pin 1 and yes, you count the pins counter clockwise.