|
|
|
|||||||
|
|
Thread Tools | Display Modes |
07-03-2020, 09:38 AM
|
#1 |
|
Boardkiller
Join Date: Feb 2014
City & State: slovakia
My Country: slovakia
Line Voltage: 230VAC 50Hz
I'm a: Hobbyist Tech
Posts: 1,977
|
Lenovo E480 no sign of life
Hello have this Lenovo E480 that after storm wont work
NM-B421 two chargers USB-C dont give me voltage. so i cut one and with cable connect my source and see 2.7W steady. Found hot area near power connector with burning resistor. it is so tiny that i cannot see its value when connect charger on one side of this resistor is 20V on other side is pulling down to ground by Q4202 If anybody have schematic, share on schematics page Last edited by ktmmotocross; 07-03-2020 at 09:54 AM.. |
|
|
|
07-04-2020, 03:07 AM
|
#2 |
|
Badcaps Veteran
Join Date: Jul 2014
City & State: Caloocan, Manila
My Country: Philippines
Line Voltage: 220VAC 60hz
I'm a: Professional Tech
Posts: 325
|
Re: Lenovo E480 no sign of life
no free schematics available..all are paid.. anyone care enough to share their schematics..?
__________________
Never stop LEARNING because life never stops TEACHING! Last edited by SMDFlea; 07-04-2020 at 05:01 AM.. |
|
|
|
|
07-04-2020, 06:39 AM
|
#3 |
|
Boardkiller
Join Date: Feb 2014
City & State: slovakia
My Country: slovakia
Line Voltage: 230VAC 50Hz
I'm a: Hobbyist Tech
Posts: 1,977
|
Re: Lenovo E480 no sign of life
we have some good guys like SMDflea that share this schematic
https://www.badcaps.net/forum/showthread.php?t=85795 Last edited by SMDFlea; 07-04-2020 at 06:54 AM.. |
|
|
|
|
07-04-2020, 07:04 AM
|
#4 |
|
Boardkiller
Join Date: Feb 2014
City & State: slovakia
My Country: slovakia
Line Voltage: 230VAC 50Hz
I'm a: Hobbyist Tech
Posts: 1,977
|
Re: Lenovo E480 no sign of life
in schematic i dont see any ID pin but in cable there is wire for it.
Anybody know how this USB-C charger work? i have new charger, why it dont give voltage? |
|
|
|
|
07-04-2020, 09:10 AM
|
#5 |
|
Moderator
Join Date: Jan 2018
City & State: York
My Country: UK
I'm a: Knowledge Seeker
Posts: 4,626
|
Re: Lenovo E480 no sign of life
Google search "NM-B421 VSYSTEM2" ,you`ll find some posts on chinafix and elvikom. USB-C is still a mystery to me.
|
|
|
|
|
07-05-2020, 08:08 AM
|
#6 | |
|
Badcaps Veteran
Join Date: Jul 2014
City & State: Caloocan, Manila
My Country: Philippines
Line Voltage: 220VAC 60hz
I'm a: Professional Tech
Posts: 325
|
Re: Lenovo E480 no sign of life
Quote:
 |
|
|
|
|
 |
| Thread Tools | |
| Display Modes | |
|
|
Linear Mode
