please someone help to identify part PQ512 . IT IS A SMALL mosfet and is burned out
thanks
NConstantinou
Badcaps Veteran
Last Activity: Today, 08:21 AM
Joined: 05-27-2017
Location: Nicosia
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Lenovo Yoga370 CIZS3 LA-E292P Identify parts
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The bios i need is for the laptop
LENOVO YOGA370
COMPLIANCE ID: TP00078C
S/N NO TAG
M/B CIZS3 LA-E292P REV:1A
2016-12-14
THA IS ALL I HAVE
THANKS -
So 4B= means that is rt8207p ic!Leave a comment:
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DEAR ALL
i need bin file for above board.
Laptop turns on but no screen.
thanks...Leave a comment:
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WHAT IS THE IC 4B=4D! WHERE CAN I FIND DATASHEET!
THANKSLeave a comment:
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Lenovo Yoga 370 NO DISPLAY
Dear all,
the laptop is charging, i have 3.3,5v and 1v on coils. when i switch on the fan spins and stops.. i tried removing the battary and hold the power button by removing power cable for 60 sec but nothing.
does anyone has any suggestions!
i noticed the sw3 on board is broken completely.
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i already changed the ic but still no display. by checking the components on control board i didn't find anything else wrong....Leave a comment:
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By unplugging connections and connecting back now on unplug connector of control board I get 230v.
if I plug connector no displayLeave a comment:
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Further troubleshooting. Since I got 230v on filter capacitor, then I checked Ntc brown component I do have 230v but on L and N on control board only 13v, no display.Leave a comment:
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i have noticed that are no fuses on board. can i apply 230v ac directly on board!
on this board r67 and u2 7 pin ic was burned and replaced.
what voltage should i get on main capacitor
thanksLeave a comment:
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This is the component. I will take a picture of board tomorrow.
thanks...Leave a comment:
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the capacitance reading between L&N is 0.05μfLeave a comment:
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HOW TO TEST MIFLEX X25 HELP!!!
Dear all
i have Elecrolux dishwasher with no power light on display. i found on control board R67 and ic burn which i replaced.
i do not get 230v ac on control board. i removed power in connector and i varified that.
i started with the main plug and the wire goes to this miflex component. on miflex i do get 230vac. how do i test the output!
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ELECTROLUX DISHWASHER IC LNK362GN HELP!!!
Hi all,
i am checking this ic LNK362GN and between Source to Drain i get 013 reading in diode mode. I am wondering if this is a correct value.
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Re: Liteon pa-3271-06mx help!!!!
Dear harp,
the fuse was blown while i was testing power supply BUT the MOSFET on heatsink was burned. and i can not see the number.
is it possible to tell me the number!
ThanksLast edited by NConstantinou; 11-14-2023, 05:15 AM.Leave a comment:
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Re: Liteon pa-3271-06mx help!!!!
Thanks to harp and the other people for the help BUT specially harp because he had a picture of a power supply and i noticed that i replaced 2 parts in a wrong place RV001 and HS3 green part varistor and black part near main capacitor.
i switched them according to harp schematic and now i do have 320vdc on main
capacitor.
i there any way to test power supply without desktop!
if i short green and black cable it should start! Green cable is label 11vsb!
Thanks everyoneLeave a comment:
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Re: Liteon pa-3271-06mx help!!!!
Dear CapLeaker,
Thanks for your reply.
the L & N lines on board show very little resistance. After the first inductor there is a green part label RV which is NTC SCK018 and is a varistor. that measures a small resistance.
Now since at the input wires i do not have 220v AC and all solder points seem to be ok
how i will find the defective part!
i removed from board filter capacitor, first inductor and are not shown as open or short
NOTE:
If i remove RV green varistor then on LN i...Last edited by NConstantinou; 11-13-2023, 08:07 AM.Leave a comment:
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Liteon pa-3271-06mx help!!!!
Dear all,
i have the above power supply from Microsoft desktop surface.
fuse was blown and changed.
On input lines L & N i get a very little ac reading.
i checked fuse, filter capacitors, coils, main mosfet and main capacitor and nothing is shown as short except the RV001 which i assume is a NTC varistor.
i removed varistor and applied heat and is decreasing which means works ok.
i remove bridge rectifier and i measured in diode mode and it looks fine.
Is the problem on rectifier, it is not suppling ac!
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