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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 have a JVC 29" 100Hz television (AV-29TH3ENS). The problem is that when the TV has been on for abot 2-3 minutes, the whole picture becomes purple. If i restart the tv the picture is back to normal for a couple of seconds, but then it turns back to purple again. Any idea where the problem mmight be...? Christian |
#2
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Bad solder connections on the CRT board,
or on the main board where the drive signals come from. Rono. "Lanzar" wrote in message om... Hi! I have a JVC 29" 100Hz television (AV-29TH3ENS). The problem is that when the TV has been on for abot 2-3 minutes, the whole picture becomes purple. If i restart the tv the picture is back to normal for a couple of seconds, but then it turns back to purple again. Any idea where the problem mmight be...? Christian |
#3
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I have now checked for any cold solder, but everything looks fine. The
picture is also blue tinted the first seconds when powered up. Then it becomes normal, and after a while it starts fluctuating to purple, and finaly its all purple tinted. Another problem is that when i push the volume+ on remote, then volume goes directly to max. |
#4
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~If it goes purple, do you mean it loses the green gun?
I would suspect a faulty tube.- perhaps the heater going O/c or an internal short developing as it warms up. Here in the UK we had many tube problems with the 29" sets, although ours were made in France...by Philips ! AW "Lanzar" wrote in message om... I have now checked for any cold solder, but everything looks fine. The picture is also blue tinted the first seconds when powered up. Then it becomes normal, and after a while it starts fluctuating to purple, and finaly its all purple tinted. Another problem is that when i push the volume+ on remote, then volume goes directly to max. |
#5
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This set also has a Philips made tube. The picture becomes purple
tinted, i don't know if the green is missing but probably. I can see all tree filaments glov in the tube... I have also tried tapping the neck while problem occurs, but no change. "JVC Dude" wrote in message ... ~If it goes purple, do you mean it loses the green gun? I would suspect a faulty tube.- perhaps the heater going O/c or an internal short developing as it warms up. Here in the UK we had many tube problems with the 29" sets, although ours were made in France...by Philips ! AW "Lanzar" wrote in message om... I have now checked for any cold solder, but everything looks fine. The picture is also blue tinted the first seconds when powered up. Then it becomes normal, and after a while it starts fluctuating to purple, and finaly its all purple tinted. Another problem is that when i push the volume+ on remote, then volume goes directly to max. |
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