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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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On Sun, 24 Aug 2003 17:38:17 GMT, "G. Skiffington"
wrote: Hello all.....This color VGA monitor has been blurry for a the couple of years I've owned it (used), and I've only made a slight improvement by slight adjustment of the HV control and external brightness and contrast pots. There is lots of brightness and good control of both it and the range of contrast. Searching the web found slight reference to a possible defect from new (other vague reference is to maybe it being a bleeder resistor). Does anyone here know if there's a common problem to this monitor with respect to this problem? Any specific info appreciated - Thanks. IBM TYPE is 8513-001 Monitor p/n 59X6293 FRU p/n (?) 68x3088 Gord Wow!! 8513 still alive? Replace flyback transformer, focus section in that flyback transformer fails frequently, I did two before, IBM had recall on those but that recall period was long time since over. Cost? not that expensive actually for that fly from decent electronics suppliers, so many out there back then. Remember to discharge HV on that tube to dag ground strap before replacing that flyback. Cons: Only 12" CRT, the true viewable size is much smaller (like 10" because this doesn't "scan to the edges", extremely tiny, can only 640x480 at one freq 60Hz, compareable decent monitor was 14" or larger in that era couple years after this 8513 and had 800x600 72Hz. The main problem is the components is very old and really aged from all that heat & stress, replacing flyback is not only one to fix, you have to account for the CRT aging, electronics aging etc. User control is only contrast & brightness, that it. Decent monitors has more controls for user to adjust externally. PS: better to ditch if you can do that. This that little beauty is from 1988-1990 (introduced around 1987 to go with IBM PS/2 series) era. Low end like Samsung 17" S or V series is plenty enough and can be had for 100 or so. 1024 x 768 75 or 85Hz on very sharp tube and still can sync to any lesser resolutions including 8513 specs. Even cheaper to get 15" samsung monitor if you can get your hands on one. If you are willing to spluge bit more, Samsung 753MB, very nice monitor flat CRT .20mm dot pitch, all Samsung monitors has 3 yr warrenty. Cheers, Wizard |
#2
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On Sun, 24 Aug 2003 19:10:50 GMT, Jason D. wrote:
On Sun, 24 Aug 2003 17:38:17 GMT, "G. Skiffington" wrote: Hello all.....This color VGA monitor has been blurry for a the couple of years I've owned it (used), and I've only made a slight improvement by slight adjustment of the HV control and external brightness and contrast pots. There is lots of brightness and good control of both it and the range of contrast. Searching the web found slight reference to a possible defect from new (other vague reference is to maybe it being a bleeder resistor). Does anyone here know if there's a common problem to this monitor with respect to this problem? Any specific info appreciated - Thanks. IBM TYPE is 8513-001 Monitor p/n 59X6293 FRU p/n (?) 68x3088 Gord Wow!! 8513 still alive? I have a 8511 you can have FREE... you pay shipping. It still works fine... I got it new. |
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