Thanks...
giulio93
Badcaps Veteran
Last Activity: Today, 10:28 AM
Joined: 08-04-2021
Location: Bologna
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It is normal that I have 2.8V ad the right node of the resistor (the black chip) and 0 on the left side? Measuring in resistance mode I have 0 Ohm to ground on the left and 100KOhm on the right. It is normal that one side of the resistor is connected to ground? And I don't understand if the ACOK is a INPUT or OUTPUT for the ISL chip.
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Ok I'll do It. But reguarding the previus questione? You ask me for a top marking chip. I answer to your question? Can we continue in the ACOK checking?...Leave a comment:
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Is my answer on pint about your question?...Leave a comment:
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Can you guide me sir?
Please...Leave a comment:
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If you are talking about the first 2 DC-IN mosfet they are "Nikos PK5N2ES" for the big one (the first one) and "7360" for the other one.
I have not the PQ4410 mark on the board...Leave a comment:
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The DCIN mosfets are those I already measure? 19.9 on D e S and 25V on the gate?...Leave a comment:
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How can I find those mosfets and resistors on the board?...Leave a comment:
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I am not very good in reading schematics. Anyway I found the schematic of the laptop you suggest me and to understand better what is the ACOK i look at a datasheet of a BQ735. Anyway now I measure again the pin2 and i get 2.8V, I don't know if the first reading was wrong or if something has change (most likely the firs hipotesy). 2.8V is high or still low?...Leave a comment:
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I thing I find something strange.
Here in the pics I report the V at those resistors (I think they are resistors). If I measure the resistance of the resistor inside the circuit I get 150KOhm ish. If I measure against GND the second gives me 150KOhm again but the top one gave me 0.4V!!! Is it possibile that after the smd I have a short?
I tried to inject 1V and it takes all the A i gave (I stayed low around 0.5A) but I didnt see nothing becoming hot so i stop the injection....Last edited by giulio93; 04-04-2025, 11:56 AM.Leave a comment:
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Not having the pinout which PIN should be? And It Is a I or O per the IC?
What should I check know?
It Is normal to have all this PIN at 0V or 0,06ish?...Leave a comment:
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the mosfets measure the same: D-S 3 or 7 MOhm depending the probe side; S-G 5.5 MOhm; D-G 7 to 9 MOhm.
Connection between CLR and PIN 32 of the IC.
19.98V on S and D of each mosfet and 25V on Gate...Leave a comment:
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Thanks for reply. The 19V now passes the CRL so I think before It the 2 mosfs work fine but i Will take the measure you ask for anyway.
I have Sharp probes but the PIN are so close that Is Easy yo touch 2 pins.
What Is AOCK?
It Is normale that a lot of pins are at 0V?...Leave a comment:
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Here the solder joint. They seam fine to me, what do you think?...
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I check around the I/O chip an I have no Voltage so the laptop cannot power on obviusly. But why no power on the I/O chip!!
I wish I have the ISL datasheet with the pinout to better understand if some V is missing!Leave a comment:
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Checking all the pins i burnt the chip and replace it. Now I have the 25V on the first Mosfs!!!! I report anyway the pin's V ( the 3 missing was too risky to measure)
PIN 1 = 2,666V
PIN2 = 0,06
PIN3 = 0,06
PIN4 = 0,06
PIN5=0,03
PIN6=0
PIN7=0
PIN8=0
PIN9=0
PIN10=0
PIN11=5.3
PIN12=0
PIN13=0
PIN14=0.06
PIN15=0,06
PIN16=3.14
PIN17=0.99
PIN18=19.6
PIN19=5.24
PIN20=5.24
PIN21=
PIN22=0.06
PIN23= START FROM 1.3 DOWN TO 0.2
PIN24=4.9
PIN25=0
...Leave a comment:
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Thank you very much for your reply.
As soon as i come back home i'll do the measurments.
2 things: I don't Remember what the CLR Is and It I Remember well i have no 19V at any PIN of the ISL chip (but if I plugged the battery in I have the 12V at some pins)...Leave a comment:
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Update, i order a new battery (not original) to test. Now I have the 12V on the resistor After the battery, but again the mobo doesn't start. The gate of the 2 firsts MOSFET Is Still at 0. Can you help me?...Leave a comment:
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I have some updates. I found the EMB09 A03 faulty (it was shorted) so I order it and today I replace it. Now I have this situation, around the Intersil chip i mesure 5V 3.1V and 1V ish. So I suppose the chip is working fine, but the mobo seams death. The gate of the first mosfet after the 19V power in is 0V so the mosfet is closed. I tried also to connect the battery but nothing changed. Also I don't know if it is normal but on the resistor above the battery i measure 0V. If I measure pin to pin on the battery (disconnected from the mobo) I obtain 3,1Vish from all the cells, but if i plugged it...Leave a comment:
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