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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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#1
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Hi, I've a Sony PVM-2730QM right now which has the following symptoms..
1) Takes a long time to focus. Has to warm up for a while before the focus becomes pin-sharp. More important, 2) It has a colour shift... after about 2 seconds (assuming the filaments are warm), the whites will become slightly yellow or pink, depending on it's mood. There's also colour bleeding of the red channel around white highlights. Turning the Picture (contrast) control all the way down helps somewhat, but the colour shift is still there. I replaced a leaky electrolytic on the CRT board a while back (bright flash upon switch off), could the rest of the electrolytics be going belly up? Thanks in advance... --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.813 / Virus Database: 553 - Release Date: 12/14/2004 |
#2
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The CRT is going weak in this model of monitor, in acordanance of the
symptom you are describing in how they look when weak. -- Jerry G. ===== "Wong Sy Ming" wrote in message ... Hi, I've a Sony PVM-2730QM right now which has the following symptoms.. 1) Takes a long time to focus. Has to warm up for a while before the focus becomes pin-sharp. More important, 2) It has a colour shift... after about 2 seconds (assuming the filaments are warm), the whites will become slightly yellow or pink, depending on it's mood. There's also colour bleeding of the red channel around white highlights. Turning the Picture (contrast) control all the way down helps somewhat, but the colour shift is still there. I replaced a leaky electrolytic on the CRT board a while back (bright flash upon switch off), could the rest of the electrolytics be going belly up? Thanks in advance... --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.813 / Virus Database: 553 - Release Date: 12/14/2004 |
#3
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Jerry G. wrote:
The CRT is going weak in this model of monitor, in acordanance of the symptom you are describing in how they look when weak. Or the smoothing electrolytic for the video output amp's +200V is becoming weak. --- Met vriendelijke groet, Maarten Bakker. |
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