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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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Sony Trinitron Color Problem
I have a twelve year old Sony Trinitron that has suddenly developed a color
problem. The colors all of a sudden changed to mainly green and pink. No adjustment brings it back to normal. A friend told me a color gun failed. Might this be so? Another friend told me it might be the video board. If this is so, where can I get a replacement board? And where can I get a schematic? |
#2
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Sony Trinitron Color Problem
It is most likley a weak electron gun in the CRT which throws the color
mixing off balance |
#3
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Sony Trinitron Color Problem
Being 12+ years old it is probable the crt has finaly given up, may want to
have the tele checked out to assure yourself of that fact or just look for a viable replacment tele. "MarkC" wrote in message ... It is most likley a weak electron gun in the CRT which throws the color mixing off balance |
#4
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Sony Trinitron Color Problem
"beaudoin" wrote in message ... I have a twelve year old Sony Trinitron that has suddenly developed a color problem. The colors all of a sudden changed to mainly green and pink. No adjustment brings it back to normal. A friend told me a color gun failed. Might this be so? Another friend told me it might be the video board. If this is so, where can I get a replacement board? And where can I get a schematic? I think a sudden change like you indicate points to a component failure rather than a weak tube as the tubes tend to lose emmission more slowly over time. A green/pink picture might indicate a failed blue video output device. Swapping the RGB connectors on the CRT neck might help in diagnosis. You don't say which model but there are some Sony schematics available here http://rv6llh.rsuh.ru/shema2.htm Other posters may know of others. Pete |
#5
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Sony Trinitron Color Problem
What's the model #?
-- ================================= Jeff Stielau Shoreline Electronics Repair 344 East Main Street Clinton,CT 06413 (860)399-1861 (860)664-3535 FAX ================================= "beaudoin" wrote in message ... I have a twelve year old Sony Trinitron that has suddenly developed a color problem. The colors all of a sudden changed to mainly green and pink. No adjustment brings it back to normal. A friend told me a color gun failed. Might this be so? Another friend told me it might be the video board. If this is so, where can I get a replacement board? And where can I get a schematic? |
#6
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Sony Trinitron Color Problem
I think a sudden change like you indicate points to a component failure
rather than a weak tube as the tubes tend to lose emmission more slowly over time. A green/pink picture might indicate a failed blue video output device. Swapping the RGB connectors on the CRT neck might help in diagnosis. You don't say which model but there are some Sony schematics available here http://rv6llh.rsuh.ru/shema2.htm Other posters may know of others. Pete I would agree with Pete's assessment. Sams Fotofacts are usually my first choice for schematics. Warning: Sonys can be a pain in the a*s to fix! smile John |
#7
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Sony Trinitron Color Problem
On Sun, 9 May 2004 23:25:45 -0400, "beaudoin" wrote:
I have a twelve year old Sony Trinitron that has suddenly developed a color problem. The colors all of a sudden changed to mainly green and pink. No adjustment brings it back to normal. A friend told me a color gun failed. Might this be so? Another friend told me it might be the video board. If this is so, where can I get a replacement board? And where can I get a schematic? Don't overlook a degauss problem. Sometimes a magnetized tube can have the overall appearance of a missing color, instead of the more commonly seen localized discoloration. Might try resoldering the degauss thermistor. Alan Harriman |
#8
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Sony Trinitron Color Problem
Thanks to everyone responding. The model number is kv-27tr10. Any
additional leads/help will certainly appreciated. |
#9
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Sony Trinitron Color Problem
I don't know if this was mentioned already, but look for an aprox 1"x1" square
shaped black colored part. It's a 3 leg thermister labeled on the board as THP601. It's on the far left of the main board toward the back a couple inches from the fuse. Look at all 3 connections to this part under the board. You'll find a burnt connection on one lead. Resolder it and you'll be all fixed up. Ron |
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