Badcaps.net Forum
Go Back   Badcaps Forums > Search Forums
Register FAQ Calendar Search Today's Posts Mark Forums Read

Showing results 1 to 25 of 500
Search took 0.04 seconds.
Search: Posts Made By: Dannyx
Forum: Troubleshooting Game Consoles & Other Weird Devices Today, 01:24 PM
Replies: 2
Views: 9
Posted By Dannyx
Re: Repairing digital scales (readout not stablizing)

Haven't analyzed the circuit in depth to work out exactly what those resistors do, but I can surmise they're doing some sort of current limiting for the SLA battery that goes in a compartment on the...
Forum: Troubleshooting Game Consoles & Other Weird Devices Today, 11:24 AM
Replies: 2
Views: 9
Posted By Dannyx
Question Repairing digital scales (readout not stablizing)

Good day folks. Some of you may know that this place where I work at gets its hands on all sorts of crap, from your usual stuff like TVs and PCs to fairly niche stuff like audio mixers and to...
Forum: Schematic Requests ONLY! 03-15-2019, 11:24 AM
Replies: 0
Views: 19
Posted By Dannyx
Thumbs up Asus X50GL (F50GL) schematic

Good day folks. Does anyone happen to have a schematic for an Asus X50GL ? It's also called F5GL from what I've seen online. It's got an Nvidia graphics chip on it, for reference. I found the...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 03-11-2019, 11:47 PM
Replies: 6
Views: 147
Posted By Dannyx
Re: Toshiba A200-17O black screen. LA-3481 (BIOS or reflow ?)

No, no signs of previous reflow. It even had that red wax still present at the chip's corners.

Yeah, obviously not going to bother replacing the GPU - too expensive and not worth it...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 03-11-2019, 12:36 PM
Replies: 6
Views: 147
Posted By Dannyx
Re: Toshiba A200-17O black screen. LA-3481 (BIOS or reflow ?)

UPDATE: same problem with NB - no change even after "reflow". BIOS is up next...couldn't find anything exact like I said, so I hope one for PSAE6E is enough and what comes next is not important....
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 03-11-2019, 10:47 AM
Replies: 6
Views: 147
Posted By Dannyx
Thumbs up Re: Toshiba A200-17O black screen. LA-3481 (BIOS or reflow ?)

Blasted the GPU with some flux this time - no change: still turns off after a couple of seconds...attempting same procedure with NB. Either that, or one of the chips is dead - not just coming off the...
Forum: BIOS Requests ONLY! 03-09-2019, 10:56 AM
Replies: 3
Views: 406
Posted By Dannyx
Re: toshiba satellite a200-1n2

Sorry if I'm late to the party here, but is this BIOS compatible with the same board but a different model ? Mine is an A200-17O...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 03-09-2019, 10:47 AM
Replies: 6
Views: 147
Posted By Dannyx
Unhappy Toshiba A200-17O black screen. LA-3481 (BIOS or reflow ?)

Good day folks. I hope I'm not breaking any rules by not posting in the BIOS section, since this is also a generic discussion alongside a BIOS request. A friend asked me to have a look at this laptop...
Forum: General Electronics Technical Discussion 03-06-2019, 10:48 PM
Replies: 98
Views: 1,024
Posted By Dannyx
Wink Re: Directly replacing NiMh cells with Li-Ion cells - bad idea ?

Yes, but in this case it's considered to be under warranty since the first set of batteries went kaput last time, so I don't think he'll be charged anything extra. I also just recently learned that...
Forum: General Electronics Technical Discussion 03-06-2019, 01:57 PM
Replies: 98
Views: 1,024
Posted By Dannyx
Re: Directly replacing NiMh cells with Li-Ion cells - bad idea ?

It's assumed that "he know what he's doing" given that's what he's employed for. There's no real way management can actually gauge a technician's performance and/or overall skills and knowledge,...
Forum: General Electronics Technical Discussion 03-06-2019, 01:31 PM
Replies: 98
Views: 1,024
Posted By Dannyx
Re: Directly replacing NiMh cells with Li-Ion cells - bad idea ?

Of course - there's a 3 month warranty period for all repairs, which makes perfect sense from the client's perspective (it's also in the law here AFAIK), but it can become problematic for the company...
Forum: General Electronics Technical Discussion 03-06-2019, 12:54 PM
Replies: 98
Views: 1,024
Posted By Dannyx
Re: Directly replacing NiMh cells with Li-Ion cells - bad idea ?

Vac's still in the shop BTW, all packed up and ready to go. "Mr. Battery" called the client to come pick it up, but he hasn't showed up so far. Guess the chap is too afraid something might go pop and...
Forum: Troubleshooting TVs and Video Sources 03-05-2019, 11:57 AM
Replies: 34
Views: 466
Posted By Dannyx
Re: Sharp LC-52D64U hard to start

I would continue reflowing stuff in that area. Another idea that just crossed my mind is to see what transformer that FET is driving and swap THAT with another one, rather than the FET. The heat...
Forum: Troubleshooting TVs and Video Sources 03-03-2019, 04:47 AM
Replies: 34
Views: 466
Posted By Dannyx
Re: Sharp LC-52D64U hard to start

Well if heating the board causes it to turn on, I'd try to zone in on the problematic area by heating less and less of the board until you pinpoint it. I did this with a mainboard once which had a...
Forum: Troubleshooting TVs and Video Sources 03-03-2019, 03:22 AM
Replies: 34
Views: 466
Posted By Dannyx
Re: Sharp LC-52D64U hard to start

Can you hear any arcing ? I had the same issue with a Panasonic (I think) which used this master-slave inverter setup and although not visible, one of the transformers was arcing internally. It was...
Forum: Troubleshooting TVs and Video Sources 03-02-2019, 11:37 AM
Replies: 34
Views: 466
Posted By Dannyx
Re: Sharp LC-52D64U hard to start

Bypassing the protection on the inverter IC sounds like the only option left to mess around with at this point.
Forum: General Electronics Technical Discussion 02-25-2019, 11:17 AM
Replies: 24
Views: 226
Posted By Dannyx
Re: Dual transformer power supply build

Makes sense I guess, though the safest (and probably not the ideal) way to go is to series/parallel before them entirely.
Forum: General Electronics Technical Discussion 02-25-2019, 11:03 AM
Replies: 24
Views: 226
Posted By Dannyx
Re: Dual transformer power supply build

Ok, so I was half-right...I'm not sure how well these DC-DC converters play with each other in series/parallel. Speaking of that: IS it possible to parallel/series a switch mode DC-DC converter like...
Forum: General Electronics Technical Discussion 02-25-2019, 10:45 AM
Replies: 24
Views: 226
Posted By Dannyx
Talking Re: Dual transformer power supply build

You mean like this ? I believe you're suggesting to wire the outputs in series only when needed and leave them separate for two 48v outputs, as otherwise this setup would not allow me to have the two...
Forum: General Electronics Technical Discussion 02-25-2019, 10:04 AM
Replies: 24
Views: 226
Posted By Dannyx
Red face Re: Dual transformer power supply build

Still experimenting and not wanting to give up on the idea of making this as complex as possible, here's another design idea: 48v on the right, 96v in the middle...at least in theory. The only caveat...
Forum: General Electronics Technical Discussion 02-24-2019, 11:29 AM
Replies: 24
Views: 226
Posted By Dannyx
Thumbs up Re: Dual transformer power supply build

Actually the fan "controller" is a DC-DC converter that used to be a car cigarette socket charger for a phone...I modified its feedback loop with an NTC to lower/increase the output based on the...
Forum: General Electronics Technical Discussion 02-24-2019, 10:10 AM
Replies: 24
Views: 226
Posted By Dannyx
Re: Dual transformer power supply build

So the trick only works with a single center-tapped transformer ? It certainly did work the last time someone suggested it when I built my first supply. I used the 48v output (ends of the...
Forum: General Electronics Technical Discussion 02-24-2019, 03:55 AM
Replies: 24
Views: 226
Posted By Dannyx
Lightbulb Re: Dual transformer power supply build

I wasn't planning on using the AC part - I was going to throw a rectifier on that 96v bus. Again, like you said, it will probably never see any use, but it's there when needed...nothing more...
Forum: General Electronics Technical Discussion 02-23-2019, 02:37 PM
Replies: 24
Views: 226
Posted By Dannyx
Re: Dual transformer power supply build

See, it's a good thing I did some research first...

Still trying to wrap my head around transformers in series...it seems simple at its core, but once I try to do funky stuff like this, it's a bit...
Forum: General Electronics Technical Discussion 02-23-2019, 10:28 AM
Replies: 24
Views: 226
Posted By Dannyx
Re: Dual transformer power supply build

Ok, so if I wire the outputs of the bridge rectifiers in series, this removes the possibility of having two separate DC-DC modules.

If I do it before the rectifier, like in the schematic, the only...
Showing results 1 to 25 of 500

 
Forum Jump


Badcaps.net Technical Forums 2003 - 2019
Powered by vBulletin ®
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 02:11 PM.
Did you find this forum helpful?