The fujitsu laptop is shorted and i suspect a mosfet, because its heating up when injected in DC bench
Attached Files
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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. -
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 upComment
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Hello guys,
I have a shorted MOSFET K8A60DA with the following characteristics:
Type Designator: TK8A60DA
Marking Code: K8A60DA
Type of Transistor: MOSFET
Type of Control Channel: N -Channel
Maximum Power Dissipation (Pd): 45 W
Maximum Drain-Source Voltage |Vds|: 600 V
Maximum Gate-Source Voltage |Vgs|: 30 V
Maximum Gate-Threshold Voltage |Vgs(th)|: 4 V
Maximum Drain Current |Id|: 7.5 A
Maximum Junction Temperature (Tj): 150 °C
Total Gate Charge (Qg): 20 nC
Rise Time (tr): 25 nS
Drain-Source... -
I tried to use this method:
Testing an N-channel MOSFET:
Step 1: Discharge the Gate (turn off the MOSFET)
Place the black probe (COM) on the Source (S) and the red probe on the Drain (D). The multimeter should show no continuity (high resistance or "OL" – open line).
Then, touch the black probe to the Source (S) and the red probe to the Gate (G). This discharges any stored charge in the Gate, turning the MOSFET off.
Step 2: Charge the Gate (turn on the MOSFET)
Now, place the red probe on the Gate (G) and the black probe on the...09-27-2024, 03:31 AM -
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