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Search: Posts Made By: momaka
Forum: Troubleshooting Power Supplies and Power Supply Design Yesterday, 04:33 PM
Replies: 26
Views: 1,284
Posted By momaka
Re: 5v rail to high

Yup, most of my cheap multimeter do that. I just have to rotate the dial several times to clean the oxidized contacts. After that, they read voltage okay... provided that their batteries are also...
Forum: Troubleshooting Power Supplies and Power Supply Design Yesterday, 04:17 PM
Replies: 24
Views: 578
Posted By momaka
Re: The Cheapest ATX Power Supply on Amazon Prime, How bad can it be?

+10

Definitely a decent power supply now that you can use in any average-powered rig (i.e. nothing with a big power-hungry GPU over 80 Watts.)

And yes, probably a good idea to re-label it...
Forum: Custom Tweaks, Modifications, and Revisions Yesterday, 03:59 PM
Replies: 24
Views: 1,108
Posted By momaka
Re: Your Video Card Cooling Mods

No ideas, but I do know temperatures below freezing weaken the epoxy, though. In the past, I've removed the heat spreaders on PS3 GPU chips just with heating the heat spreader to around 60-80C and...
Forum: General Computer Discussion Yesterday, 03:34 PM
Replies: 21
Views: 374
Posted By momaka
Re: Two graphic cards not detected by BIOS

^ The Drain pin on that MOSFET should be connected to the 12V rail on your PSU, then. Otherwise, check your measurements again, as it doesn't make sense for this MOSFET to be connected to the fan and...
Forum: Troubleshooting Power Supplies and Power Supply Design Yesterday, 03:20 PM
Replies: 2,959
Views: 691,416
Posted By momaka
Post Enermax Pro 82+ EPR525AWT

Iím just posting this for the Enermax Pro 82+ EPR525AWT power supply found in this thread (https://www.badcaps.net/forum/showthread.php?p=856406#post856406). I got this failed power supply from a...
Forum: Troubleshooting Power Supplies and Power Supply Design Yesterday, 02:58 PM
Replies: 12
Views: 287
Posted By momaka
Re: Enermax PRO 82+ 525W repair

No problems, and sorry if it seems like I'm overtaking your thread.

But I figured since I have the same exact PSU with almost the same issue, we might as well "combine resource" (or so to speak)...
Forum: General Capacitor Questions & Issues 10-12-2018, 09:44 PM
Replies: 84
Views: 21,556
Posted By momaka
Re: How to Recondition (Reform) Electrolytic Capacitors and Why

If it's an oldschool stereo amplifier (1980's or 1990's) with Japanese caps, it probably will be okay to just plug it in. Most of the Japanese caps used in those amps are non-aqueous, and often don't...
Forum: Troubleshooting Computer Displays 10-12-2018, 09:29 PM
Replies: 41
Views: 874
Posted By momaka
Re: Another HannsG HG281D

Those in the bald text are all problematic.
VDDA should be at least 10V, and not uncommon to have it to 12-15V.
VGL should be negative and VGH at least 3-8V higher than VDDA.

So it looks like...
Forum: General Computer Discussion 10-12-2018, 09:10 PM
Replies: 29
Views: 406
Posted By momaka
Re: Supermicro P6DGU Retro Build

Don't worry that much. ;) I agree that flash always makes things look worse than they are (and hence why I always try to take shots without). But in this case (pun intended :p: ), the results came...
Forum: Troubleshooting Audio Equipment 10-12-2018, 11:08 AM
Replies: 4
Views: 86
Posted By momaka
Re: Panasonic Thrusters SB-250

24 AWG, supposedly. I know, I got suspicious of that too. It's probably only rated for a low-voltage, hence why it looks so thin (i.e. it has thinner insulation).


Come to think of it, that would...
Forum: Troubleshooting Power Supplies and Power Supply Design 10-12-2018, 10:32 AM
Replies: 12
Views: 287
Posted By momaka
Lightbulb Re: Enermax PRO 82+ 525W repair

Part 2: Disabling the APFC Circuit and Some Testing

Ever since I saw more than a few PSUs with blown APFC circuits, I always wondered if there is a way to disable the APFC section. Well folks,...
Forum: Troubleshooting Power Supplies and Power Supply Design 10-12-2018, 10:14 AM
Replies: 12
Views: 287
Posted By momaka
Lightbulb Re: Enermax PRO 82+ 525W repair

I guess this took a bit longer to get to than I expected (my laptop is still down for the time being - good thing I keep backups!)

Part 1: APFC Circuit Analysis

So as I mentioned in my previous...
Forum: General Computer Discussion 10-10-2018, 07:53 AM
Replies: 29
Views: 406
Posted By momaka
Re: Supermicro P6DGU Retro Build

Yeah, new cases are more about the paint job and lights than anything else. Even really expensive heavy ones seem to have silly features and use the cheapest of the cheapest Molex/SATA connectors for...
Forum: Troubleshooting Computer Displays 10-10-2018, 07:34 AM
Replies: 41
Views: 874
Posted By momaka
Re: Another HannsG HG281D

That's a problem. I have never seen small ferrite beads like that read open-circuit. Some had resistance as high as 4-Ohms due to high inductance. But never open.

Before concluding they are bad,...
Forum: General Computer Discussion 10-09-2018, 02:36 PM
Replies: 29
Views: 406
Posted By momaka
Re: Supermicro P6DGU Retro Build

Uhm.... I think you got the wrong quote up there ^ , RD... :rolleyes:
or rather, you quoted TC with my user name in there. Oops! :group:


Hehe, I guess you know how to keep the junkers off your...
Forum: General Computer Discussion 10-09-2018, 10:32 AM
Replies: 29
Views: 406
Posted By momaka
Re: Supermicro P6DGU Retro Build

So lots of MOSFETs and other chips get left behind then. Ceramic caps too. That's not totally stripped in my book. :D


940/AM2 is when AMD quality started going down a bit, in terms of mobos. But...
Forum: Troubleshooting Computer Displays 10-09-2018, 08:43 AM
Replies: 41
Views: 874
Posted By momaka
Re: Another HannsG HG281D

Sorry for the delay in response. My laptop from which I usually visit BCN decided to get corrupted HDD / Windows boot sector. :p:

Anyways.
Yes, if T-con is not getting power, then we need to look...
Forum: General Computer Discussion 10-07-2018, 06:29 PM
Replies: 29
Views: 406
Posted By momaka
Re: Supermicro P6DGU Retro Build

So it's possible you threw out quite a few good boards then. :p:
On seconds thoughts... most old hardware just needed a recap. So maybe not that many. And newer hardware with polymers probably...
Forum: General Electronics Technical Discussion 10-07-2018, 05:17 PM
Replies: 8
Views: 216
Posted By momaka
Re: is this a NCP1014AP065G ?

Glad to hear you got it running again. :)
By the way, do you have a picture of the PSU board? I'm just curious if this TV has APFC or not, given the 450V primary input cap. Thanks. :)
Forum: Troubleshooting Power Supplies and Power Supply Design 10-07-2018, 03:50 PM
Replies: 46
Views: 705
Posted By momaka
Re: Samsung 245B 00173A No power No blue LED

Not quite yet.
What happens if you put all of the boards from the good screen onto the bad one? If it works, then issue could be back on the logic board then. Typically white screen is t-con board,...
Forum: General Computer Discussion 10-07-2018, 01:56 PM
Replies: 21
Views: 374
Posted By momaka
Re: Two graphic cards not detected by BIOS

Could be a MOSFET or a BJT. I can't quite tell, so will need a part number on Q223.

Regardless if that part is bad or not, the pin on the fan connector should still be connected to it, if Q223 is...
Forum: Troubleshooting Computer Displays 10-07-2018, 01:48 PM
Replies: 41
Views: 874
Posted By momaka
Re: Another HannsG HG281D

T-con board.
That's the one permanently attached to the TFT screen and usually located at the top of the monitor, under a metal shield. It's possible the badcaps may have cause damage to the t-con...
Forum: General Computer Discussion 10-07-2018, 07:51 AM
Replies: 21
Views: 374
Posted By momaka
Re: Two graphic cards not detected by BIOS

^ Then yes, it's normal for it to measure open-circuit or high resistance. After all, the power pins will be connected to 12V and ground. If there card has fan speed control, there may be a MOSFET or...
Forum: Troubleshooting Power Supplies and Power Supply Design 10-07-2018, 07:42 AM
Replies: 24
Views: 578
Posted By momaka
Re: The Cheapest ATX Power Supply on Amazon Prime, How bad can it be?

Maybe it's just a special PPFC coil with two windings: one for Live and one for Neutral. I recall HiPro doing something like that in one of their older 250W PSUs. There were even special taps on the...
Forum: General Computer Discussion 10-07-2018, 07:27 AM
Replies: 13
Views: 263
Posted By momaka
Re: Dual Celeron Weirdness Build....

*Looks at HP NetServer E-800PC / CUR-DLS motherboard* :rolleyes:
Yup, it's got an empty socket.
https://www.badcaps.net/forum/attachment.php?attachmentid=24352&d=1301715572
... or rather a socket...
Showing results 1 to 25 of 500

 
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