Tv Hitachi CPT 2150 sre
Hello Friend. What number is the tv chassis. ---- and in that stage of the tv. have you checked to try to fix the fault
colleague: how is that what, you put the vertical yoke short ... if you do that you would burn the vertical lc ... put chassis number ... ok ..
A-well ... every day we learn new things ... that's a new one I didn't know ... he-he-
Hi Ricardo. How is it that you shorten the yoke and shine. Plug in the TV and without making any short see if it turns on filament. And it measures tension of each cathode or scrin.
In case of doubt the filament is on, it increases scrin of the flyback preset and sees that it manifests on the screen.
If you do not report what really happens by stressing the tensions and how is that short you do, we can not help Ricardo. You are with the tv. And by this means it is difficult many times but it is achieved with everyone's help. Plus your contribution. Your detailed technical report. That is necessary. And it is a forum rule.
How to help you if you just say the TV does not go and making the vertical yoke short gives shine.
I never saw that before. And I think that if he does that it is because the TV is going.
Colleague, normal lon tensions, feed the filament x separately and when you turn on the TV it works for 2o3 seconds and protects itself. It is not flyback or CI or source or vertical.
try welding a R of 0.33 hom in parallel with the R451 of 0.47ohm ... you can. R451 (OCP protection) is undervalued turn off the TV erroneously ... as long as you do not have any overload or short in the vertical or hor stage, ... also check the R810 of 0.30ohm q, it is between pin2 and ground mass STR-S5707 at the source's original ... if the R810 is undervalued, it can turn off the TV ... weld another R of 0.33ohm in parallel with the R810 and comment on results ... but there are q, make sure, no short in the secondary ... raise the voltage of 25v q, go to the vertical and see what happens ... ok ...
Thank you very much for your advice, it was the 451 transistor that controls the ocp that was short and the micro was blocking the horizontal Oscillator. It was ok !!
Hi Ricardo: I'm glad that you have already solved the problem, ... the OCP protection was as I mentioned ... from my side "congratulations" and do not forget to value my contributions as (solution accepted) ... of this way is in the archive of solutions for other colleagues ... ok ... greetings!
well: but measure the tsh and see if it is not short or leaking ... check the vertical stage if there is no short film ... get to turn on the computer ... you can see if it illuminates the screen ...
You have noticed that, when you turn on the TV, you pull AT on the pacifier of the tube ... you have to give more details ... explain what measurements you have made ... ok ..
Dear colleague if you read my question, you will see that I have already carried out the rurina tests. The TV is not protected if I short-circuit the vertical yoke. I think the order comes from the micro
56 seconds ago nicomena2015's Avatar
nicomena2015
try welding a R of 0.33 hom in parallel with the R451 of 0.47ohm ... you can. R451 (OCP protection) is undervalued turn off the TV erroneously ... as long as you do not have any overload or short in the vertical or hor stage, ... also check the R810 of 0.30ohm q, it is between pin2 and ground mass STR-S5707 at the source's original ... if the R810 is undervalued, it can turn off the TV ... weld another R of 0.33ohm in parallel with the R810 and comment on results ... but there are q, make sure, no short in the secondary ... it raises the tension