LifeBook P771-D FMVNP5NE CP502430-Z5 Schematic/Boardview Request

[Adiktus]

The fujitsu laptop is shorted and i suspect a mosfet, because its heating up when injected in DC bench

[mon2]

Re: LifeBook P771-D FMVNP5NE CP502430-Z5 Schematic/Boardview Request

Which part is heating up ? The mosfet ? What are the markings on the mosfet ?

Remove all power. Meter in resistance mode (2k scale is ok).

Check the resistance for the following:

source (1-2-3) & drain (5-6-7-8)
source (1-2-3) & gate (4)
gate (4) & drain (5-6-7-8)

Checking for any low resistance readings. Post your measurements.

[Adiktus]

Re: LifeBook P771-D FMVNP5NE CP502430-Z5 Schematic/Boardview Request

Which part is heating up ? The mosfet ? What are the markings on the mosfet ?

Remove all power. Meter in resistance mode (2k scale is ok).

Check the resistance for the following:

source (1-2-3) & drain (5-6-7-8)
source (1-2-3) & gate (4)
gate (4) & drain (5-6-7-8)

Checking for any low resistance readings. Post your measurements.

The marking of the mosfet is UE 1224G, i cant find any details about it

For the measurements

source (1-2-3) & drain (5-6-7-8): 1.0m Ω

source (1-2-3) & gate (4): 099.4k Ω

gate (4) & drain (5-6-7-8): 1.1m Ω

i only injected 3volts and 1amp skipping the fuse and that mosfet heats up

[kalilinux25]

Re: LifeBook P771-D FMVNP5NE CP502430-Z5 Schematic/Boardview Request

The marking of the mosfet is UE 1224G, i cant find any details about it

For the measurements

source (1-2-3) & drain (5-6-7-8): 1.0m Ω

source (1-2-3) & gate (4): 099.4k Ω

gate (4) & drain (5-6-7-8): 1.1m Ω

i only injected 3volts and 1amp skipping the fuse and that mosfet heats up

change mosfet low resistance says itself.