HP ELITEBOOK 850 G5 ISL9538h area resistor value

[jkyoho]

Hi all,
wish you have a safe and good day.

I recently recevied this HP 850-G5 laptop with blow/bad isl9538H.
Ordered the new ic replaced it still no standby 3.3v or 5v with only 20v@0.0017A drawing. Digging hard for ISL9538h datasheet and realized the CSIP&CSIN current sense line has 2 resistors value goes off. By any chance anyone know what value of this 2 resistor in the CSIP&CSIN lines are.(RED circle)

[jkyoho]

Re: HP ELITEBOOK 850 G5 ISL9538h area resistor value



reference from DELL laptop isl9538h datasheet. It seems to be low resistance or 0 0hm from my guess.

[Soriano]

Re: HP ELITEBOOK 850 G5 ISL9538h area resistor value

measured in main
Left 50 ohm
Right 25 ohm

[mcplslg123]

Re: HP ELITEBOOK 850 G5 ISL9538h area resistor value

I beleive anything around 10-30 ohms will do. value for both resistors should be same.

[Risat]

ISL9538h ic 19 pin (ACIN) single voltage divider resistor value plz

[mon2]

See above schematic, prb05 and prb07 build a voltage divider for the acin pin.

[skazide]

can ISL9538h work for isl9241h ?

[elgollo51]

Good evening, could someone help me with the value of a resistor for this laptop model? I am sending you the screenshot indicating the resistor that I would like you to help me with the value of.

[mon2]

Which resistor? The one pointed to by the yellow arrow?

[elgollo51]

No friend, further up on the left side, near the RJ45 connector, the arrow is very small, a yellow arrow and a red circle indicating the resistance.

[mon2]

Share details of any silk screening on the board. Unable to find a schematic in my database. What is the large connector to the left side above the RJ45?

[elgollo51]

Share details of any silk screening on the board. Unable to find a schematic in my database. What is the large connector to the left side above the RJ45?

The main board is an HP Elitebook 850 G5 and the motherboard is listed as COMPUTRO-6050A3079801 - MB - A01 (A1), in the schematics that I have searched for in the boardviews it does appear but without the value and in the schematics that resistance does not appear, could you help me with a main board and see what the value of the resistance is, please.

[mon2]

See attached - another motherboard appears to be very very similar. This is like winning a lottery.

Reference:

HP EliteBook 840 G6 - 6050A3022501-MB-A01

Confirm if this missing resistor is mating with pin # 25 on the ISL regulator. If yes, then the other side of this missing resistor is ground. Then this part is most likely NOT missing because there should be a pcb trace to short across the pads on the PCB.

Confirm or correct this understanding.

[elgollo51]

Good evening, sorry I was busy yesterday, that resistor is connected to pin 19 ACIN of the ISL9538H with the closest resistor that is connected to pin 16 ADP.