Re: Dummy load for testing laptop chargers
2 12V lamps in series, of the appropriate wattage.
b700029
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Last Activity: 07-14-2023, 08:36 PM
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Re: Hp compaq cq60 keyboard and touchpad not working
Clean the connector on the mobo.Leave a comment:
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Re: Need help on this lenovon Power supply
There's no BIOS startup or HDD password as you've gotten as far as the Windows login.
There does appear to be a BIOS admin password though, but that can wait for later, unless it's not letting you boot to one of the password-changing utilities recommended above. In that case try clearing the CMOS battery.
(I don't recommend "inheriting" a Windows installation from someone else, better to just format and reinstall. This is something you can do yourself.)Leave a comment:
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Re: corsair hx620 hissing/rattling sound
Use a thin nonconductive tube as a stethoscope to see where that sound is coming from. It sounds like arcing or a faulty protection circuit that's attempting to shut it off in bursts.Leave a comment:
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Re: Advice on reflowing HP DV6000?
A multimeter won't work. You might even damage it with the ohmmeter bias voltage, since these chips are not designed to take much more than ~1v. Either way it'll show as shorted across the power rails, just like a CPU, because it's a high current low voltage device....Leave a comment:
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Re: Toshiba Satellite L300 overheating ,bad heatsink?
I agree with this. You can alternately run hot and cold water through the fins, and the other end should change temperature almost instantly, much faster than regular thermal conduction through a block of metal....Leave a comment:
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Re: Help identifying DS Lite trimmer potentiometers.
...so the place selling them doesn't even know their value?
Leave a comment:
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Re: Burnt components in USB DAC + help in identifying
Remove U107 and measure the resistance between pin 7 and ground. There might be something shorted in the output that's causing it to heat up.Leave a comment:
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Re: Dell Laptop Charger
Have you considered using DS2431 instead? Same capacity as a 2502, slightly different write characteristics (closer to regular EEPROM), about 66% cheaper.Leave a comment:
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Re: AT PSU mod - take two!
I guess that's the reason for the fan twitching when turning off from protection mode, but all the AT supplies I've seen have the output just die off otherwise when turning off normally....Leave a comment:
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Re: Power supply build quality pictorial. part 2
It's the current rating that matters, increasing the reverse blocking voltage won't change that. As Th3_uN1Qu3 said above, the voltage from the transformer output isn't anywhere near that.
@Th3_uN1Qu3: [url=http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00174849.pdf]ST also makes TO-247 13009s.[/url]Re: Power supply build quality pictorial. part 2
It's the current rating that matters, increasing the reverse blocking voltage won't change that. As Th3_uN1Qu3 said above,Leave a comment:
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Re: Seasonic SS-200SFD
The original was max 35ns, so those are a bit slower. Might work, or might not, depending on how they spec'd the original circuit.Leave a comment:
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Re: Seasonic SS-200SFD
Manufacturer: "Zowie Technology"
You need to replace it with an 800V 1A ultrafast diode (<= 35ns recovery time).Leave a comment:
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Re: Codegen 350XA supply
Has this supply ever powered the mobo successfully? The 4-pin connector is +12V for the CPU buck converter and draws a [i]lot[/i] of power.Re: Codegen 350XA supply
Has this supply ever powered the mobo successfully? The 4-pin connector is +12V for the CPU buck converter and draws a [i]lot[/i] of power.Re: Codegen 350XA supply
Has this supply ever powered the mobo successfully? The 4-pin connector is +12V for the CPU buck converter and draws a [i]lot[/i] of power....Leave a comment:
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Re: Toshiba Satellite - Locks up when plugged in
Or they were installed with too much heat/too long. Reading the datasheet suggests that they're quite sensitive to heat....Leave a comment:
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Re: AT PSU mod - take two!
Would you say that almost all AT supplies use the same design or are nearly identical? All the ones I've had the misfortune of shorting would buzz like that and twitch the fan until powered off manually....Leave a comment:
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Re: Codegen 350XA supply
The flats will vary in width to maintain a constant 12V average on the output filter caps, as the load varies.
If you're going to try measuring the primary, remember to float the DUT with the isolation transformer, NOT the scope....Leave a comment:
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Re: Codegen 350XA supply
Escort Eagle, he's not going to get anything to work with the 12V rail at half its nominal voltage.
You mean [i]diode[/i] on a bracket
...The possibly only advantage of building it this way is so you only need to replace one diode instead of a 2-diode pack...
Re: Codegen 350XA supply
Escort Eagle, he's not going to get anything to work with the 12V rail at half its nominal voltage.
You mean [i]diode[/i] on a bracket
...The possibly only advantage of building it this way is...Leave a comment:
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Re: Chip of the year 2008
If anyone has the equipment to decap one of them we might be able to figure out who the manufacturer is.
I have a good guess it's Chipgoal (lol) CG[b]8[/b]00[b]2[/b]...Re: Chip of the year 2008
If anyone has the equipment to decap one of them we might be able to figure out who the manufacturer is.
I have a good guess it's Chipgoal (lol) CG[b]8[/b]00[b]2[/b]...Re: Chip of the year 2008
If anyone has the equipment to decap one of them we might be able to figure out who the manufacturer is.
...Leave a comment:
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Re: Asus A6000 (A6K) - To reflow, or not to reflow...
Here is the boardview. Do you know Polish?
[url]http://www.elvikom.pl/forum/viewtopic.php?p=157[/url]Re: Asus A6000 (A6K) - To reflow, or...hp?p=157[/url]Leave a comment:
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