Re: LG Flatron L1732TQ -Display "out of range"
If you've swapped the caps already, I'd be suspicious of the two 22pf capacitors and the crystal. Crystals do wear out (the contacts basically break off the quartz slice), and when they're "on the way out" it gets harder to make them oscillate. Putting the capacitance of an oscilloscope probe on there might have been just enough to make it oscillate.
I'd try swapping the crystal, then if that doesn't do anything, swap the two 22pf capacitors.
As for those dimples in the pins... it looks...
philpem
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Last Activity: 08-06-2011, 04:58 AM
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Last edited by philpem; 02-14-2010, 07:03 PM. -
Re: Cap. plague in Minolta DiMAGE Scan Elite 5400?
The CCFL turns on when the scanner powers up and stays on all the time.Leave a comment:
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Re: Cap. plague in Minolta DiMAGE Scan Elite 5400?
Urgh...
Just spent a few hours with the oscilloscope and found *nothing*. The original caps were Taicons, guess I misread the labels. Oops. I swapped them anyway, no change. Also swapped the motor driver chips (there are a few notes in the service manual that imply that Minolta knew something about failing motor drive chips). No change with that either.
I'm working this weekend, so I'm taking a little "working break" from this particular project. However, if anyone who's done troubleshooting...Leave a comment:
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Re: Cap. plague in Minolta DiMAGE Scan Elite 5400?
Tacon. I know of Taicon (in fact Google kept replacing "Tacon" with "Taicon" in my searches), but couldn't find anything about Tacon (not even an entry on the FC2 capacitor logo database). That's partly why I was somewhat suspicious of them -- usually the decent (or at least half-decent) manufacturers actually have websites...
The Tacon I measured is marked 330uF, and there's one not far away marked 100uF -- I suspect they're wired in parallel and my ESR meter is getting confused......Leave a comment:
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Cap. plague in Minolta DiMAGE Scan Elite 5400?
Hi guys,
I'm trying to fix a Minolta DiMAGE Scan Elite 5400 film scanner. When powered up, the light blinks slowly (as it should), the software can see it, but as soon as it tries to start the "startup dance" (i.e. pull the mechanism into a sane starting position), the light turns either solid on or solid off, the PC software locks solid, and... well... that's it. You can unplug the scanner (USB or power) and the PC software will suddenly spring back to life and whimper about the scanner being unplugged, but that's it.
I've had the thing open this afternoon -- as... -
Re: Post your system.......
Seriously though, EVGA do have a GTX285 "FTW Edition". I do wonder what their marketing team were smoking when they came up with that one. To be fair, it is the fastest card they sell, so the name is justified, and it sort of fits in with the general naming scheme (GTX2xx, GTX2xx SuperClocked, GTX2xx SSC, GTX2xx FTW). I still think it's a silly name though
I budgeted for an 8800GT or something along those lines (can't remember off-hand) to start with, then got an email from the supplier that...Leave a comment:
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Re: Post your system.......
Hmm, where to start... OK, the "desktop" box, aka cheetah...
ASUS P5N72-T Premium mainboard
Intel Q6600 G0 SLACR (VID 1.2875), overclocked to 3GHz, cooled by a Zalman CNPS9500AT (which works a lot better when you RTFM and align it correctly with the case fan
)
2x 2GB Corsair TwinX DDR2-1066 (total of 4GB RAM.. on a 32bit box, what a waste...)
896MB EVGA GTX260 (the standard one, couldn't afford the "OMGWTFLOLBRB superoverclocked" one, and a stock '260 is fine for HL2, Portal, TimeShift and UT anyway)...Last edited by philpem; 03-11-2009, 02:24 PM.Leave a comment:
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Re: Viewsonic VA912b messed up display
I've just been through the same thing with my VX922. It would turn on (for a few seconds) then the green power light would start blinking long-on, short-off. After a few attempts, it was possible to get it to start and stay on, but turn it off and you get to play the whole game again.
Getting it open is a pain -- four screws on the corners to remove, then force a metal spatula between the silver surround and the back of the case. There are about half a dozen clips holding it together -- unlock a corner first, then work your way...Leave a comment:
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Re: Netgear DG834GT badcap repair
Another point about the 834GT - typically, when the caps go the glue holding the inductors down will also have gone slightly conductive. This throws the SMPSU out of whack -- not enough to throw the PSU out of regulation, but enough to make the thing hiss like mad.
Solution is to desolder both of the large power inductors, remove the white glue (to the point of scraping it off the PCB and washing it down with isopropyl to get rid of the residue), scrape it off the inductor leads, then solder the inductors back down. Also clean off...Leave a comment:
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Netgear DG834GT badcap repair
From my fault log, hope this is some use:
Device: Netgear DG834GT ADSL2+ 802.11g Wireless Router, manufactured late 2006/early 2007.
Failure mode: Power on, two orange blinks from TEST LED, WiFi LED flickering, LAN switch functions seemingly OK, but no access to web interface, ADSL connection apparently down, and obviously no routing function. Accompanied by loud audible whine/whistle, like a switchmode PSU that's running out of regulation. Unit previously known to have poor WiFi signal strength/quality.
Cause of failure: Multiple.
5x defective... -
Re: Anyone recognise these?
OK, I found a link to the "big list of cap logos" that was mentioned in this thread --
[url]https://www.badcaps.net/forum/showthread.php?t=5610[/url]
The site itself is [url]http://capacitor.web.fc2.com/[/url].
The first image I posted was made by Changzou Huayue - [url]http://www.cn-huayue.com/e1.htm[/url]
The second one is an SJE -- Sang Jing Electronics -- cap. [url]http://www.capacitors.com.tw[/url]Re: Anyone recognise these?<br /> <... of cap logos"...Leave a comment:
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Re: Anyone recognise these?
@Leopard: Thanks for the ident. I figured they'd be badcaps, but I only wanted them for breadboarding anyway. I use Panasonic, Nichicon and Chemicon caps for production kit.
Strangely enough, can't find any mention of the company, only a similar one that uses the text "TH" in a rounded-rectangle as a logo.
@Scenic: Min Wa / MinWa. Based in Hong Kong IIRC. I've got a battery charger made by them. "Intercept MW 6278". Actually one of the better NiMH chargers I've had... at least the delta-V detection actually works...Last edited by philpem; 07-24-2008, 02:09 PM.Leave a comment:
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Anyone recognise these?
Hi folks,
Just bought a few bags of these caps off ebay - my LCR meter reckons they're in spec for capacitance, just wondering if anyone recognises the logo...
This one's a 25V 4700uF, specced for -40C to +105C, and has a weird "GD" / "CD" logo that I can't seem to identify...
Anyway, on with the images:
Any ideas, folks?
Thanks,
Phil....
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