Thank you guys for your support and suggestions. I will be back!!!!
Bogdan Kolybaba
Member
Last Activity: 03-21-2024, 06:13 PM
Joined: 02-17-2024
Location: Halifax
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It is strange, but today suddenly PU301 has heated, i stopped AC supply and found 5 Om resistance on IN-GRN pins. I am sure that before this IC wasn't hot as AC was connected for long periods. Anyway will order it, and a couple of other RC components and proceed with repairing. Have learned a lot these days Thank you guys for your support and suggestions. I will be back!!!!
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It seems that Pin17 of PU301 generates +3VLP as per attached power diagram. Or i am mistaken? Unfortunately, I cant find datasheet neither for PU301 and Pu501 to findout next steps.
I have no signal on pin#17 of PU301, on the D1 Schottky i also have nothing on all pins. Resistance of Pin17 - GND is infinite.
But i have a 3.3V signal on PU501 pin#17 though.
I am confused now. May be I have to connect BIOS RealTime Clock Board to get +3 from there? But i remeber that Whie/Amber Led worked w/o this board connected....Leave a comment:
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EN! is activated By EC , right? So I must look for EC supply and why it doesn't enable EN1. If EC burned - no sense to recover MB then. Can you suggest any methodic how to test EC please? IMHO supply goes from PU1 PIN # 5 = 3V [B]3.3V_ADP_DCIN[/B], doesnt it? To make EC works i need just to supply +3VALW_EC to the VTR pins. Tomorrow will look to this. I see on scheme there another diode from [B]3.3V_ADP_DCIN[/B] to EC, it may be burned.
F##CK I thought that supply for this Amber/White LED doesnt involve EC, just through comparetors.EN! is activated By EC , right? So I must look for...Leave a comment:
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Update to above - I dont have neither +3VALW , +3VLP and +5VALW . Seems PU501 and PU301 is not generating them. Both IC have V_in +19VB = 12.6V (still don't know why not 19.6V, as concerned schottki is ok now). Where do i have to look for to get these IC generate +3 and +5Leave a comment:
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Unfortunately changing the burned Schottky doesn't help. I am still looking for a solution. As I understand, i should concentrate on the following rails, as they are always on in any states (see attached):
+3VALW - - System +3VALW always on power rail;
+3VLP - - +19VB to +3VLP power rail for suspend power;
+5VALW - - System +5VALW power rail
Am I correct? I should not look for CPU or other power rails till those above arent in order, shouldn't I?...Leave a comment:
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Now i have
ACIN_CHG = 3.6
ACOK_CHG = 3.06
DCIN_CH = 19.4
Still no light on MB led...Leave a comment:
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Hi . Found a burned PDB03 diode, so +DC_IN_SS 19v looks disconnected. Just have questions: +VBUS_DC_SS and +19VB derives from +DC_IN_SS - why do they come back together?...
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Additionally to the above:
I have on PU 501 :
1 =2.6V
2=3=4=5=12.3V <--------------Why it is 12, Not 19V??? Cant understand why the voltage drops. See attached.
6=0v
9=0v
11=2.4v
15=4.6v
16=17=3v
19V = 0 , <-------------------Should be +5VALWP...Leave a comment:
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PU1:
PIN # 1 = 19.2V
PIN # 4 = 2.4V
PIN # 5 = 3V
Added later....
I have on PU 501 :
1 =2.6V
2=3=4=5=12.3V
6=0v
9=0v
11=2.4v
15=4.6v
16=17=3v
PJP501=PLL511=12.3v (19VB on BW???)
PJP503=0V
PJP301 =12.3v
PU301:
Pin 12 (EN_3V)=0V...Leave a comment:
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All 1,2,3 are 19.6V, No fluctuation. Thank you for detailed description of the procedure, I am using the Board View, although there are some minor difference from my MB but still ok.
Regarding PL511, on the board, it looks like a ceramic capacitor. According to the power diagram it is smth like dc/dc - but I doubt. Never seen DC/DC like this before....
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Friends - what component is this (PL511 / 5A_Z150_1210_2P-NPM on BV)PJP 301 / JUMP_43X39. No signal 5V on it . Can't find in the internet either....
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Hi Mon2!
[B]ACIN_CHG = 0
ACOK_CHG = 60.8mV
DCIN_CHG[/B] = 0
with and w/o battery connected
DC_IN presents = 19.6v
BTW V_Batt shows 12.5VHi Mon2!
[B]ACIN_CHG = 0
ACOK_CHG = 60.8mV
DCIN_CHG[/B] = 0
with and w/o battery connected
DC_IN presents = 19.6v
BTW V_Batt shows 12.5VHi Mon2!
[B]ACIN_CHG = 0
ACOK_CHG = 60.8mV
DCIN_CHG[/B] = 0
with and w/o battery connected
DC_IN presents = 19.6v
BTW V_Batt shows 12.5...Leave a comment:
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Sorry - thought i had added schematic and board view:
Schematic & Boardview: [URL]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/80261-dell-inspiron-15-5570-la-f115p-boardview[/URL]
Also, have attached the scheme where i highlighted concerned components in my post abovehttps://Sorry - thought i had added ...oardview[/URL]...Leave a comment:
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Dell 15 5570 LA-F115P wont start after it was repaired
Hi All. I had a problem with Dell 5570 : loose DC Jack and no battery charge from AC adapter althought laptop works normally and charging of the battery using USB3 was ok as well.
I have replaced DC jack, removed the blown TVS diode PD1 (didn't install the new one as don't have for now) and replaced PR6 and PR3. After AC adapter was connected to the MB, the LED was lighting as charging works (wite long flash after dim and again White ), after the light changed to the yellow. I thought it is ok now, assembled all back but after connected AC adapter - the fan had moved slightly and laptop... -
Thanks bro! Now I understand!...Leave a comment:
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Dell AC adapter - 1 wire protocol. How to initiate to check if adapter works.
Hi all. Trying to troubleshoot issues with the Dell Laptop power supply (a lot of info here). Now I am waiting for a DC power Jack, as there is a loose contact. Want to check if the ID line of the adapter works - I have given abt 3.2 V to this line through the voltage divider, but can't see any signal on the oscilloscope. Same with the 100500% working AC adapter as well. How to initiate 1-Wire protocol transmission? As I understand, the circuit in the AC adapter should send a package for a while as soon as the supply comes to the SPID line. How to initiate this transmission correctly without... -
Hi All. I am a seaman in the past but I have an interest in microelectronics and programming. As a father - have to repair a lot of toys, laptops and smartphones, an i am enjoying doing this!Leave a comment:
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