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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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Sharp TV 19TB33 problem
I have a 1991 Sharp TV 19TB33 and all of the sudden the picture flattened
down to about a 2 inch thick strip in the middle of the screen. I can do most repairs, altough it's been a while since I've used my electronics skills. I pulled the back off the unit and didn't notice anything obvious in the sense of a blown part. Although not sure where things are located on the board, and was being quite wary of the CRT. I've been electrocuted when I was a kid and it wasn't any fun. So I'm real causious, but also know that there are right ways of doing stuff. And on that note, would a CRT discharge tool for a Macintosh monitor work for discharging the CRT on this or other TVs? Could someone point me in the right direction of what I need to look for and where I might get a schematic? Thanks in advance. Scott |
#2
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Sharp TV 19TB33 problem
Three things are pretty common that would cause this problem.
1. bad solder connections at the vertical output IC 2. high esr or leaky capacitors in the vertical circuit or supply to it 3. bad vertical output IC The repair would be approximately $64-110 in my shop, which is likely typical. If you don't have good soldering skills, an esr meter, and easy acces to the parts, you are better off just taking it in to a good shop. No need to discharge the CRT for this repair. BTW, had you been electrocuted as a child you wouldn't be posting here. Electrocution is death by electricity. Regardless, you are wise to be cautious. Leonard "Scott" wrote in message . .. I have a 1991 Sharp TV 19TB33 and all of the sudden the picture flattened down to about a 2 inch thick strip in the middle of the screen. I can do most repairs, altough it's been a while since I've used my electronics skills. I pulled the back off the unit and didn't notice anything obvious in the sense of a blown part. Although not sure where things are located on the board, and was being quite wary of the CRT. I've been electrocuted when I was a kid and it wasn't any fun. So I'm real causious, but also know that there are right ways of doing stuff. And on that note, would a CRT discharge tool for a Macintosh monitor work for discharging the CRT on this or other TVs? Could someone point me in the right direction of what I need to look for and where I might get a schematic? Thanks in advance. Scott |
#3
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Sharp TV 19TB33 problem
Thanks Leonard.
I just I should say that I should have been electrocuted. Scott No need to discharge the CRT for this repair. BTW, had you been electrocuted as a child you wouldn't be posting here. Electrocution is death by electricity. Regardless, you are wise to be cautious. Leonard |
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