User Profile

NConstantinou · 11-27-2025, 12:18 AM

can i substitute ic G5608DR51U with TPS51125!

thanks

NConstantinou · 11-11-2025, 11:44 PM

The resistance to ground of Vreg3 is 35HOMS.
if it is slow do you apply voltage!

NConstantinou · 11-11-2025, 08:31 AM

changing PU12 3/5v ic i have the following voltages

Pin 16 Vin 19v
Pin 8 Vreg 1.23v
Pin 17 Vreg 5 5v
Pin 3Vref 2v
Pin 13 En0 15.28v
Pin17 5v
Pin4 5v
Pin 9 5v
Pin 12 5v

Vreg3 and Ugate1,2 0v

pls advice

NConstantinou · 10-28-2025, 03:32 AM

ok thanks.
changing the mosfet i got 2.85v on PL5. is that normal!

NConstantinou · 10-28-2025, 02:25 AM

what the values suppost to be

NConstantinou · 10-28-2025, 12:40 AM

I managed to get 19v rail working.
No 3/5v rail.
PL5 coil which is battery coil i get only 1.1v without battery connected.
i cheched PQ15 which is the high side on Drain i have 19v but on G i have 1.2v. it should be higher.
measuring the resistance of mosfet i found the following

S-D 57k
S-G 90K
D-G 0.27M

i substituted BQ28 with BQ25

please someone advice...

NConstantinou · 09-12-2025, 06:41 AM

PU12. I do have +VIN 19v, pin #3 ref 2v, pin 17 VREG5 1.5v, pin 8 VREG3 0.09v, pin 13 EN0 2.5v.
what is the order of power sequence of G5608Dr51U 9PU12) ic!

IF +5VPCU WHICH IS MISSING FROM IC COMES FROM PQ7!
ON PQ7 PIN 1 AND 3 I GET 1.5V AND ON PIN 2 12V

Thanks...

NConstantinou · 09-10-2025, 06:08 AM

Doing more testing i found on PU 2 ic pin #4 is connected with 2 100k resistors. Those where having wrong value and i change them.
After that i got PR7 19V but not 3.3 and 5v.
time for that step now

NConstantinou · 09-10-2025, 01:37 AM

Thr resistance on PR7 now is 43K

NConstantinou · 09-09-2025, 11:54 AM

The resistance I measured was on PR7 45 ohms
Before I have changed pq34 which was short and then I focus on ic charger as my first step.

at this moment I went back to check pa34 again and I found it short again.
I changed it and now the resistance on PR7 is .5 which is normal, but 0v on PR7 which means problem with charger ic....

NConstantinou · 09-09-2025, 09:59 AM

The resistance of PR7 to ground is 45 OHMS. Pin 1 of PQ21 has 19v. the gate of PQ21 has 0v.
i do not get any voltage on REGN pin # 16. i replace the ic with BQ25A from another USED board board but i do not know if it is good.
is anything i can do to test the ic!
By checking the coils i found that the 3.3v coil has also 45 Ohms resistance
Thanks

NConstantinou · 08-21-2025, 11:48 PM

I DISCONNECTED PIN1 OF PL605 AND I NOTICED THAT THERE IS NO OUTPUT FROM IC 605 PIN8 VSWH.
THAT MEANS I HAVE TO ORDER AOZ5019QI_QFN23...

NConstantinou · 08-21-2025, 09:11 AM

CHECKING THE IC PIN VSWH I GET 10 OHMS TO GROUND. IS THAT NORMAL!

NConstantinou · 08-21-2025, 08:43 AM

PL700 IS 9K. WHEN POWER ON I DO HAVE 3.3,5,1.8,1.2,0.6,1.35,0.9 BUT ON PL700 I GET 0.05V
I FOUND A SCHEMATIC AND PL700 HAS TO DO WITH BATTERY WHICH IS NOT CONNECTED SO IT IS CORRECT.
BUT MOTHERBOARD SWITC ON FOR A MINUTE AND THEN SHUTDOWN. NO DISPLAY
IN ORDER TO POWER ON AGAIN I HAVE TO WAIT TO DISCHARGE 2-3 MINUTES AND THEN PLUGIN AGAIN TO POWER ON.
PL605 HAS NO VOLTAGE I WILL SEE THAT

NConstantinou · 08-21-2025, 04:39 AM

I WOULD LIKE TO MENTION THAT I FLASH BIOS AND NOW FAN SPINS BUT NOTHING ON SCREEN AND STILL THE SAME WITH FLASH LIGHTS

User Profile

Profile Sidebar

MACBOOK A3241 NO POWER

Leave a comment:

Leave a comment:

Leave a comment:

Leave a comment:

Leave a comment:

Leave a comment:

HP LA-8044P POWER PROBLEM

Leave a comment:

Leave a comment:

Leave a comment:

Leave a comment:

Leave a comment:

DA0U92MB6D0 REV:D NO POWER

IC MARKING 13 FG IDENTIFICATION

Leave a comment:

Leave a comment:

Leave a comment:

Leave a comment:

DELL INSPIRON P66F BLINKING AMBER 3 TIMES AND WHITE LIGHT 5 TIMES