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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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SHARP tv problem
Model 32UF6 ... 2003 flat screen .
The screen comes on very bright white with retrace lines . I can see no menues If i turn up the flyback screen control the picture squeezes in on both sides about an inch . The screen control is now all the way down |
#2
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SHARP tv problem
sounds like a yoke problem
Ken G. wrote: Model 32UF6 ... 2003 flat screen . The screen comes on very bright white with retrace lines . I can see no menues If i turn up the flyback screen control the picture squeezes in on both sides about an inch . The screen control is now all the way down |
#3
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SHARP tv problem
No its not the yoke . Other tv`s do this and its usually a resistor
somewhere . I cant seem to find this one |
#4
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SHARP tv problem
Ken G. wrote:
No its not the yoke . Other tv`s do this and its usually a resistor somewhere . I cant seem to find this one change out the video amp ic on the vrt board crt is being satuated by a short video amp |
#5
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SHARP tv problem
Resistor or diode in G2 supply?.
"David Naylor" wrote in message . .. Ken G. wrote: No its not the yoke . Other tv`s do this and its usually a resistor somewhere . I cant seem to find this one change out the video amp ic on the vrt board crt is being satuated by a short video amp |
#6
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SHARP tv problem
Thanks for the replys . I know its not always easy to guess at this
stuff witout the service manual . just thought this might be a consistant problem in this set like the Philips or Rca sets . |
#7
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SHARP tv problem
You will find that the 180-200 volt is very low on the crt board.
follow the trace to the wire(s) that go down close the flyback. That supply is made up of a resistor, diode and cap. The cap is the usual. Usually 4.7-10uf@200-250volt. If the resistor is open suspect the diode or if the crt board uses a IC for the output of the RGB than it's that IC. Good luck! Lloyd Ken G. wrote: Model 32UF6 ... 2003 flat screen . The screen comes on very bright white with retrace lines . I can see no menues If i turn up the flyback screen control the picture squeezes in on both sides about an inch . The screen control is now all the way down |
#8
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SHARP tv problem
Thanks Lloyd ... I did just that and found a bad resistor and that IC
chip is bad causing a 15 ohm short across that 200 volt supply . |
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