...Guys , im thinking about changed the FET transistor on my ASUS P4800 ...coz the FET was getting hot....and i afraid the FET was shorted...i really want to know how to remove it from the board...how much temperature to remove it..... Then can i used the compatible transistor that are same with the datasheet on the FET that i want to changed?
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...Guys , im thinking about changed the FET transistor on my ASUS P4800 ...coz the FET was getting hot....and i afraid the FET was shorted...i really want to know how to remove it from the board...how much temperature to remove it..... Then can i used the compatible transistor that are same with the datasheet on the FET that i want to changed?
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Re: How to remove FET transistor ? and changing same Volts and Amps N channel FET
If it works, don't fix it. -
Re: How to remove FET transistor ? and changing same Volts and Amps N channel FET
Being hot only means a lot of current through it. Some tweakers and now some manufacturers are putting a heatsink on top of their fets. You might consider doing this, one method I've used to attach those is arctic alumina epoxy.
Removing a surface mount fet is best done with a hot air rework station to heat the PCB copper. There is no other good way now that the entire board is populated with other parts.
If you were to replace this FET with anything but exact same part, you should also replace the other fets working in parallel with it, because having mismatched FETs will result in an uneven current sharing.
As Rainbow stated, if it works don't fix it (beyond putting a heatsink on top if you really feel it is warranted). It is not shorted out if the system runs.Comment
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Re: How to remove FET transistor ? and changing same Volts and Amps N channel FET
lol.....it was normall...coz i already ask ASUStek ,they told me the FET was normal being like that :P... Thx guys for your help ^_^Comment
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Anyone run memory speed tests with an old X58-based triple channel 1st gen or any other >2 channel board? The one I have is a Gigabyte I think.
Anyway I had four 4GB DDR3-1333 modules in the 6 memory slots and got around 11GB/sec memory speeds assuming that it went dual channel since it didn't have enough modules for triple channel. Now I stuck in two more 4GB modules, but they are DDR3-1600. I'm still getting 11GB/sec speeds according to memtest86...
Just wondering, anyone do memory speed analysis on these triple (and higher) channel memory boards? Are there any... -
Hi friends
I have reverse engineered this tester, schematic is attached and is complete except for capacitor values. These testers annoyingly have no model number but they are the ones you find on the first page of just about any website if you type in "18650 4-channel tester". There is also a 2-channel variant and a newer 8-channel variant. They are very cheap (about £15) and can measure voltage, current, internal resistance and capacity. They have a multicolour display for all these statistics. They also have terminal blocks so that if you want to use a breakout board... -
I picked up an Onkyo HT-R510 that when I plug it in and press the power button will turn on and then a couple of seconds later turn itself off. When it turns on you can hear the relay click and then immediately click again and shut the power to the system off. I spent about 5 hours today trying to troubleshoot it and I did make some progress that may not actually tell me anything. It's still not really working and I'm not quite sure where to go next.
Here's everything I've done so far.
The first thing I did was open it up and check for any burn marks exploded parts... -
Problem
This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached.... -
Hi guys I have a VLP1500 amplifier here - one channels works fine and the other channel distorts even at low volume settings
Protection and Clip LED are off
There is something wrong with the BIAS voltages around T16 and T18 (in particular) on the bad channel
I tested all diodes and transistors in this area in circuit with diode mode - both channels seem identical. Same in resistance mode across all the resistors here.
The output DC voltages on pin1 and pin8 of the 5532D dual op amp at the input of each amplifier module are the same, and the audio...
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