- Component idenification - 5 Updates
- Samles SSW2000 inverter early limit - 2 Updates
| Cursitor Doom <cd@notformail.com>: Nov 06 08:48PM Gentlemen, Having put together a dim bulb tester for current-limiting purposes and fired up the faulty 'scope, this component gets hot. I'm not really sure what it is, though and there are no markings on it at all except for two tiny blobs of paint. Anyone know? https://disk.yandex.com/i/jmR716xUNBt8OQ |
| legg <legg@nospam.magma.ca>: Nov 06 04:05PM -0500 On Sun, 06 Nov 2022 20:48:15 +0000, Cursitor Doom <cd@notformail.com> wrote: >except for two tiny blobs of paint. >Anyone know? >https://disk.yandex.com/i/jmR716xUNBt8OQ That's an NTC inrush limiter. It has roughly constant power dissipation, when in use and is expected to run warm. What is the actual current draw? Is your bulb dim? You should be able to identify parts from board designators and the reference manual. RL |
| Cursitor Doom <cd@notformail.com>: Nov 06 09:29PM >>https://disk.yandex.com/i/jmR716xUNBt8OQ >That's an NTC inrush limiter. It has roughly constant power >dissipation, when in use and is expected to run warm. That's what I thought too. But there's no such component visible on the schematic: https://disk.yandex.com/i/UhxATIy-6Y0LIA >What is the actual current draw? Is your bulb dim? 4x40W bulbs for 160W all together and they're all full-on. |
| Phil Allison <pallison49@gmail.com>: Nov 06 02:58PM -0800 Cursitor Doom wrote: ________________________ > That's what I thought too. But there's no such component visible on > the schematic: > https://disk.yandex.com/i/UhxATIy-6Y0LIA ** What about " RT1010" ??? Resistor Thermal 7.5 ohms. ..... Phil |
| legg <legg@nospam.magma.ca>: Nov 06 07:52PM -0500 On Sun, 06 Nov 2022 21:29:37 +0000, Cursitor Doom <cd@notformail.com> wrote: >4x40W bulbs for 160W all together and they're all full-on. >>You should be able to identify parts from board designators >>and the reference manual. Then it's time to find the short cct. RL |
| Jeff Liebermann <jeffl@cruzio.com>: Nov 06 10:07AM -0800 >I've got an SSW2000 repair that seems to be turning into a science >project. Specs: <https://samlexamerica.com/wp-content/uploads/2019/12/12002-SSW-2000-12A-0117.pdf> User manual, which includes some troubleshooting hints. <https://samlexamerica.com/wp-content/uploads/2019/12/11002-SSW-350-600-1000-1500-2000-12A-0117-Lrez.pdf> YouTube videos showing SSW-2000 repair (5 parts) <https://www.youtube.com/watch?v=Vq-8cV2Y8Ac> <https://www.youtube.com/watch?v=GMvSP4ojZRo> <https://www.youtube.com/watch?v=eIwK7HHqyhw> <https://www.youtube.com/watch?v=uJRR6NKsT3U> <https://www.youtube.com/watch?v=s0mxwoZOqlQ> Text accompanying Part 5: "Samlex provided me with the main PCB schematics, and a new updated input drive circuitry daughter board. It was an updated design and more reliable. I changed out all the input FETs with some quality International Rectifier brand, and input caps to Nichicon brand with a higher voltage rating. A few drive transistors burnt/shorted and replaced those." Maybe give Samlex a call and ask for a better schematic? -- Jeff Liebermann jeffl@cruzio.com PO Box 272 http://www.LearnByDestroying.com Ben Lomond CA 95005-0272 Skype: JeffLiebermann AE6KS 831-336-2558 |
| legg <legg@nospam.magma.ca>: Nov 06 02:44PM -0500 On Sun, 06 Nov 2022 10:07:50 -0800, Jeff Liebermann <jeffl@cruzio.com> wrote: >higher voltage rating. A few drive transistors burnt/shorted and >replaced those." >Maybe give Samlex a call and ask for a better schematic? Samlex would not release schematics or service info. I have read most of the available manuals and can assure you that this isn't a battery supply issue. I saw these youtube videos, and low limiting wasn't one of the issues the guy tackled. He coaxed a dead driver board out of Samlex to get the thing going, finally. Not sure he loaded it above a KW. He did a lot of random recapping and replaced a fan driver transistor. I can't see anything here below 400W load that would be an issue above that power level. I typoed the AC current sense value - ~15mR (seven resistors in parallel causing me to expectorate the 70mR figure). Have measured and tack-on substituted most of the power filter film caps without joy. Will be doing things like swapping over parts from one phase to the other, to see if symptoms follow, but this will involve some serious (de)soldering on light weight copper boards. Will need to cut power copper traces to check currents - again, more science project than repair. Ugh. RL |
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