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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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TV without red turns off
I have a television with a strange problem. When i start the tv it
takes about 10-15 seconds before the picure appears. And also the red color is missing, so the piture is bluegreen (but no lines). And then after about a half minute red fields starts flashing across the screen, and then it turnes off. Any idea what cause this? |
#2
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Whats the Make ?
Sounds like bad CRT . kip "Lanzar" wrote in message om... I have a television with a strange problem. When i start the tv it takes about 10-15 seconds before the picure appears. And also the red color is missing, so the piture is bluegreen (but no lines). And then after about a half minute red fields starts flashing across the screen, and then it turnes off. Any idea what cause this? |
#3
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You should always mention the make and model number of your TV set when
posting. Generally speaking, it sounds like the CRT is most likely defective. CRT replacement in a typical TV set, or computer monitor, generally costs more than a new unit. -- JANA _____ "Lanzar" wrote in message om... I have a television with a strange problem. When i start the tv it takes about 10-15 seconds before the picure appears. And also the red color is missing, so the piture is bluegreen (but no lines). And then after about a half minute red fields starts flashing across the screen, and then it turnes off. Any idea what cause this? |
#4
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Probably a bad CRT. I have an almost mint early 70s Sony Trinitron 13" TV
that has a "flaky" red gun that cuts in and out kind of like what you're seeing. Usually when CRT color guns go bad, the red one goes first. "Lanzar" wrote in message om... Any idea what cause this? |
#5
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"Jana" writes:
You should always mention the make and model number of your TV set when posting. Generally speaking, it sounds like the CRT is most likely defective. CRT replacement in a typical TV set, or computer monitor, generally costs more than a new unit. Could very well be something other than the picture tube. --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/ Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/ +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html Note: These links are hopefully temporary until we can sort out the excessive traffic on Repairfaq.org. Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. "Lanzar" wrote in message om... I have a television with a strange problem. When i start the tv it takes about 10-15 seconds before the picure appears. And also the red color is missing, so the piture is bluegreen (but no lines). And then after about a half minute red fields starts flashing across the screen, and then it turnes off. Any idea what cause this? |
#6
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Grundig 32" (ST 84-796/TOP/LOG)
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#7
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"Lanzar" wrote in message om... I have a television with a strange problem. When i start the tv it takes about 10-15 seconds before the picure appears. And also the red color is missing, so the piture is bluegreen (but no lines). And then after about a half minute red fields starts flashing across the screen, and then it turnes off. Any idea what cause this? As a test try swapping the drives to the CRT over. If it's the CRT then it will still flash red, if it's something else it will flash either green or blue. |
#8
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Check the drive voltages at each of the crt cathodes, compare the red with
the other two. do this with the socket attached and removed from the crt. Trouble shoot the red video drive circuitry before totally condemning the crt. If a projection set, try swapping the red drive pwb to one of the other crts and see if the set functions, remove the red crt drive and see if the set functions. ETC, Good Luck "Barney" wrote in message ... "Lanzar" wrote in message om... I have a television with a strange problem. When i start the tv it takes about 10-15 seconds before the picure appears. And also the red color is missing, so the piture is bluegreen (but no lines). And then after about a half minute red fields starts flashing across the screen, and then it turnes off. Any idea what cause this? As a test try swapping the drives to the CRT over. If it's the CRT then it will still flash red, if it's something else it will flash either green or blue. |
#9
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"Barney" wrote in message ... "Lanzar" wrote in message om... I have a television with a strange problem. When i start the tv it takes about 10-15 seconds before the picure appears. And also the red color is missing, so the piture is bluegreen (but no lines). And then after about a half minute red fields starts flashing across the screen, and then it turnes off. Any idea what cause this? If it's a Zenith you probably have a short in the picture tube, otherwise who knows, you have to post the brand and model for anyone to help you. |
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