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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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Zenith TV ~1993 blur/dark
Got a high end Zenith TV, think it's a 29". Looks to be somewhere from 90-94
model. S-video, PiP, lots of dandy stuff for a CRT set. Don't have the model number on hand, I'll post it later. Hasn't been turned on in about 5 years. The picture is darker than it should be and a little blurry. The CRT filaments do not appear to be as bright as they ought to be. Tried adjusting the focus and brightness on the flyback without much success, only washed the image out more. Is it likely to be a junker, or maybe something wrong in the flyback or the power supply of the CRT? The thing I don't like is not seeing bright orange CRT filaments. I think that may mean trouble. Too bad, it's a nice set otherwise. |
#2
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No such a thing as High End Zenith...
Sounds like the regular Zenith CRT failure.. Best Replace the thing.. kip "Ryan Underwood" wrote in message ... Got a high end Zenith TV, think it's a 29". Looks to be somewhere from 90-94 model. S-video, PiP, lots of dandy stuff for a CRT set. Don't have the model number on hand, I'll post it later. Hasn't been turned on in about 5 years. The picture is darker than it should be and a little blurry. The CRT filaments do not appear to be as bright as they ought to be. Tried adjusting the focus and brightness on the flyback without much success, only washed the image out more. Is it likely to be a junker, or maybe something wrong in the flyback or the power supply of the CRT? The thing I don't like is not seeing bright orange CRT filaments. I think that may mean trouble. Too bad, it's a nice set otherwise. |
#3
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Bright orange filaments usually mean a problem in most standard picture
tubes. |
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Ryan Underwood wrote:
Got a high end Zenith TV, think it's a 29". Looks to be somewhere from 90-94 model. S-video, PiP, lots of dandy stuff for a CRT set. Don't have the model number on hand, I'll post it later. Hasn't been turned on in about 5 years. The picture is darker than it should be and a little blurry. The CRT filaments do not appear to be as bright as they ought to be. Tried adjusting the focus and brightness on the flyback without much success, only washed the image out more. Is it likely to be a junker, or maybe something wrong in the flyback or the power supply of the CRT? The thing I don't like is not seeing bright orange CRT filaments. I think that may mean trouble. Too bad, it's a nice set otherwise. Zenith Tvs of that era are known for CRT failures, probably a junker. |
#5
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"Jumpster Jiver" wrote in message news:1cPUe.15717$Qv6.12137@trndny04... Ryan Underwood wrote: Got a high end Zenith TV, think it's a 29". Looks to be somewhere from 90-94 model. S-video, PiP, lots of dandy stuff for a CRT set. Don't have the model number on hand, I'll post it later. Hasn't been turned on in about 5 years. The picture is darker than it should be and a little blurry. The CRT filaments do not appear to be as bright as they ought to be. Tried adjusting the focus and brightness on the flyback without much success, only washed the image out more. Is it likely to be a junker, or maybe something wrong in the flyback or the power supply of the CRT? The thing I don't like is not seeing bright orange CRT filaments. I think that may mean trouble. Too bad, it's a nice set otherwise. Zenith Tvs of that era are known for CRT failures, probably a junker. Look for (4 - 5) 120 Kohm resistors on the CRT board that changed value... usually well into the Megohms. After changing those resistors most Zenith's appeared okay again. |
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"Do Little2" writes:
Zenith Tvs of that era are known for CRT failures, probably a junker. Look for (4 - 5) 120 Kohm resistors on the CRT board that changed value... usually well into the Megohms. After changing those resistors most Zenith's appeared okay again. Well, there's a lead to try out. I'll let y'all know if anything comes of it. Thanks! |
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