test charger IC BQ24780S: VCC20v ACDET 2,6V REGN 5,7V BTST 5,4V NO V ON CMSRC-ACDRV
If I inject 20v on current sensor, led is on...ok 3 and 5 v, other 1,2 v present...Around GPU many capacitor shorted 000ohms...
220vdc
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Last Activity: 04-07-2025, 07:14 AM
Joined: 11-13-2022
Location: Sardinia
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update, i desoldered SIO. UU9 was short removed too. Again no 20v on PQ5401. mosfet 5401 AND 5402 not short found. Resistance current sensor 400ohms.
test charger IC BQ24780S: VCC20v ACDET 2,6V REGN 5,7V BTST 5,4V NO V ON CMSRC-ACDRV
If I inject 20v on current sensor, led is on...ok 3 and 5 v, other 1,2 v present...Around GPU many capacitor shorted 000ohms... -
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Damaged part?
Hi, Is this Memory (see bubble)damaged?
Legion 5pro [ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3501538}[/ATTACH]... -
I injected 5v 2A after current sensor R005, standby led is on...near UU6 chip two capacitors (0.1U_6.3V_K_X5R_0201) cu 468 and 469 heat up. How can I test which one is shorted without desoldering? Grazie...
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each measurement, PQ5401-2 and boths R005 always 1....may be the capacitor in picture is foulty. I removed chip IT8227...from motherboard because was damaged [ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3297804}[/ATTACH] [ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3297805}[/ATTACH] [ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3297806}[/ATTACH]each measurement,...
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Lenovo NM-D562 no V on current sensor
Power supply
Legion 5 pro, nm-D562 rev. 2.0, short search. Test whith power supply 20v. Fuse, first and secon mosfet (pq110-pq111) ok...mosfet pq5401 ok 20v on drain no voltage on source and gate, mosfet pq5402 no voltage at all. current sensor pr5401 R005 no volts. pl and pc around are ok. Many capacitors and pl away are shorted. How can I check if mosfet pq 5401-pq5402 are ok or not? Why resistor R005 is not after second mosfet? Grazie for help... -
Thanks you,
solution was air 500° for 50 seconds.Leave a comment:
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How to IT822E-256 dissolder
Hi I'm not able to dissolder this chip...air solder station 380-450° 30 seconds nothing happened...I don't want destroy motherboard. Any tricks? Grazie -
How to IT8227E-256
Hi, which Is the simple and cheap way to programm Lenovo chip IT8227E-256? Possibile whit Ch341A? Thanks -
Lenovo legion 5 16ACH6H pro doesnt turn on
legion 5 pro 16ACH6H NM-D562 rev.2.0 s/n PF32XDD2 bios chip 25LR128DSIG doesnt turn on, only power led on. I used ch341a and neoprogrammer to read gigadevice and flash GKCN60WW bios. If I press power button nothing happened, but processor is hot. please help to find a solution. I have a laboratory power supply, solder station and hot hair solder station. How can I check voltage on mother board? Thank you, sorry for m English...I am Italian... -
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Ciao dal sud Italia, sono qui per migliorareLeave a comment:
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