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Search: Posts Made By: lti
Forum: Troubleshooting Power Supplies and Power Supply Design 08-03-2022, 08:32 PM
Replies: 35
Views: 8,117
Posted By lti
Re: Corsair CX400W 5vsb goes into safety loop

The layers are so thin and close together that they aren't very visible in a picture like that. I've seen the small value high voltage caps cracked open (huge case sizes like 4040 just for the...
Forum: General Capacitor Questions & Issues 08-01-2022, 08:28 AM
Replies: 13
Views: 437
Posted By lti
Re: Nichicon - discontinuing many electrolytic capacitor series

Yeah, they're discontinuing selected parts instead of the entire series in most cases. I used a lot of Nichicon VZ in those smaller can sizes.
Forum: General Capacitor Questions & Issues 07-31-2022, 12:37 PM
Replies: 13
Views: 437
Posted By lti
Re: Nichicon - discontinuing many electrolytic capacitor series

I noticed this a couple weeks ago and switched to Rubycon for my stock. It's weird that Nichicon would discontinue so many parts, especially the smaller ones.

I haven't had any problems with...
Forum: General Computer & Tech Discussion 07-31-2022, 11:23 AM
Replies: 5,444
Views: 1,193,130
Posted By lti
Re: best cheap/free scores 1.1

There might be a setting to change that. If I remember right, it's in the BIOS on AMD systems, so HP might have removed it. 2GB of video RAM is ridiculous for a computer like that, especially when it...
Forum: General Electronics Technical Discussion 07-23-2022, 06:14 PM
Replies: 26
Views: 579
Posted By lti
Re: PWM LED Driver DIY - looking for comments and criticism

What I meant was that you could set the PWM resolution to match (or even exceed) the ADC resolution. I actually feel like using a microcontroller just to dim LEDs based on an analog input is kind of...
Forum: General Electronics Technical Discussion 07-23-2022, 12:41 PM
Replies: 26
Views: 579
Posted By lti
Re: PWM LED Driver DIY - looking for comments and criticism

Based on the schematic with the 555, I thought the negative end of the LED string was being switched already. If there was 3V dropped across the FET, I would think it's getting hot.

You can get...
Forum: General Computer & Tech Discussion 07-11-2022, 12:46 PM
Replies: 888
Views: 463,565
Posted By lti
Re: Post your system.......

I remember that, and this laptop was patched pretty quickly (as expected for a business laptop).

Another thing is how annoying the Lenovo Vantage software is. It's nice to get updates if there's a...
Forum: General Capacitor Questions & Issues 07-06-2022, 12:41 PM
Replies: 36
Views: 911
Posted By lti
Re: What are the 'actual' effects of old electrolytics in a vintage radio?

There are also caps in series with the audio signal, and those failing open or with high ESR would cause low audio. If they fail shorted or leaky, then they won't block DC anymore.

I've also had...
Forum: General Computer & Tech Discussion 06-28-2022, 01:01 PM
Replies: 888
Views: 463,565
Posted By lti
Re: Post your system.......

I'm surprised by how low the prices are on gaming laptops now. That one actually looks nice. I get about the same battery life on my current laptop with a 90Whr battery.

I don't think I posted my...
Forum: Troubleshooting Audio Equipment 06-26-2022, 10:34 AM
Replies: 4
Views: 229
Posted By lti
Re: 2DIN Android Radio YD7388 amp short in one output

There are also caps on the input of the amp to block DC, so maybe the cap on the affected channel failed. A lot of audio ICs normally have DC on their signal pins due to their circuit design.
Forum: Troubleshooting Audio Equipment 06-26-2022, 10:24 AM
Replies: 4
Views: 243
Posted By lti
Re: DIY amp for speakers

Figures 13 and 14 in that datasheet show the maximum output power over the supply voltage range. I would guess that you'll get about 10W per channel into 6 ohms.

Power consumption will vary with...
Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals 06-18-2022, 03:48 PM
Replies: 4
Views: 293
Posted By lti
Re: MGX7520 onboard graphics problem

I don't think 25 ohms would show up in temperature measurements.

Can you see what that cap connects to? The CPU takes 2.9V and 3.3V, and I would guess that the Cx5520 runs off the same 3.3V...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 06-17-2022, 09:28 AM
Replies: 10
Views: 446
Posted By lti
Re: For laptop/PC repair what V and A rating should my probes be?

I've used those TL910 probes. They're thinner than standard probes and extremely sharp, but the wire resistance is higher than normal. I wouldn't want to measure current with them, but they're good...
Forum: General Electronics Technical Discussion 04-23-2022, 12:14 PM
Replies: 39
Views: 2,007
Posted By lti
Re: TIP120 Question

That current flows in the opposite direction.
Forum: General Computer & Tech Discussion 04-09-2022, 01:10 PM
Replies: 6
Views: 697
Posted By lti
Re: TPM 2.0 is not always standard issue

Enabling Intel Platform Trust Technology will run some kind of software emulation of the TPM for the few people who actually want Windows 11. I would expect it to be enabled by default on a current...
Forum: General Capacitor Questions & Issues 04-03-2022, 04:03 PM
Replies: 10
Views: 1,051
Posted By lti
Re: new apple studio display uses capxon caps

Apple already has the cult who thinks it's cool to constantly buy new stuff (and create e-waste as a consequence), so there isn't any need to force products to fail. It's just a company being cheap...
Forum: General Capacitor Questions & Issues 04-01-2022, 12:48 PM
Replies: 10
Views: 1,051
Posted By lti
Re: new apple studio display uses capxon caps

CapXon is unavoidable. I can only hope that their quality has improved, but I doubt it.

On top of that, the design of this monitor is insane. What are they doing with a full iPhone SoC and such a...
Forum: General Computer & Tech Discussion 03-18-2022, 09:46 PM
Replies: 142
Views: 81,277
Posted By lti
Re: The (now the death of) Dolby DP600 Build (OK, this one is BEYOND COOL)

Or me :goofy:

When I made enclosures for computer speakers many years ago, I ended up giving them a light coat of spray polyurethane, but I used pretty low-grade plywood and left the edges rough.
Forum: General Computer & Tech Discussion 03-11-2022, 08:46 PM
Replies: 5,444
Views: 1,193,130
Posted By lti
Re: best cheap/free scores 1.1

That HP/Compaq 7550 isn't a Trinitron. I saw a lot of those at the schools I went to. I remember some of them having a really screwed up picture when they were new (like shaking horizontally), but...
Forum: Troubleshooting Power Supplies and Power Supply Design 03-05-2022, 08:23 PM
Replies: 3,195
Views: 1,080,220
Posted By lti
Re: Power supply build quality pictorial. part 2

That's one of those Hong Hua fake-FDB fans. They were popular for a while, but they're just cheap crap.
Forum: General Computer & Tech Discussion 03-05-2022, 01:51 PM
Replies: 14
Views: 1,122
Posted By lti
Re: Best video card for 2D?

Video card prices went nuts over the last couple of years (for reasons that might be best discussed in the VIP forum), so I don't think you'll find anything under $100. Right now, I see people buying...
Forum: Troubleshooting Power Supplies and Power Supply Design 03-01-2022, 09:43 PM
Replies: 3,195
Views: 1,080,220
Posted By lti
Re: Power supply build quality pictorial. part 2

That is a Newton Power, and from the board size and shape, I'm guessing that it was one of Gateway's proprietary power supplies (standard ATX connectors, but an unusual small form factor that was...
Forum: General Computer & Tech Discussion 02-21-2022, 01:53 PM
Replies: 5
Views: 560
Posted By lti
Re: UPS issue

There are a lot of cheap batteries that only last about two years.
Forum: Troubleshooting Game Consoles & Other Weird Devices 02-17-2022, 11:43 PM
Replies: 106
Views: 24,470
Posted By lti
Re: Post your worthless and/or pointless repairs

I get a little bass from it, but I think there's a dip in the response just above the port tuning frequency. I think there's still a little peak around 1kHz with the current component values (47F...
Forum: Troubleshooting Audio Equipment 02-17-2022, 08:59 PM
Replies: 14
Views: 520
Posted By lti
Re: RXD26L Kenwood hi-fi schematic / advice please

The red caps look like the Elna "long-life" caps that were used in some power supplies in the early 1990s. They were known to leak.
Showing results 1 to 25 of 500

 
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