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Home | First message in thread | Previous messageRobert The DC voltage at pin 7 of the Vertical Out IC is supplied by D421 and C424 from the 25V Supply. The waveform shown at pin 7 is supplied by the IC, as it assists the waveform at pin 3 (pump up). Do you have a way to check the input signal to the Vertical Out IC (Pin 4)? It should show as the Sams I sent you (1.5VPP). If the input waveform is okay, try to find a way to remove Q702 or R705 or if possible cut the trace feeding them with an X-Acto knife and see if the problem clears. I believe Q702 feeds V. Sync to the Micro for OSD. Eric
1 comment
Hello Eric Took Q702 off the board,no difference.I would like to say thankyou again for your time.I am giving up on it.What I do is I repair them for a charity in town.I have repaired a number of tvs and am still learning.I do not have lets say,some of the fancy equipment you guys have such as the scope, which would make my life a little more easier.In time I may get one,but for now the budget says nope.Anyway I would like to email you if I run into some problems that you might have the answer for,and again I would like to say thankyou.Rob |
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