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Re: Top picture overscan issue, again ...
Overscanned in the top of the screen,is the symptom defected capacitor in the vertical section. Filter capacitor 100uf or microfarad or it is better you replaced all capacitor there and reworks or resolder all solder joint there in vertical section.So it will works better again..
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a missing power supply voltage, defective vertical output IC, or a component associated with it is likely bad. A bad connection or blown fusable resistor may be the cause of a missing power supply voltage
If EHT is lesser than normal, this type of fault can occur. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy. http://electronicshelponline.blogspot.com/
Hi I had the same problem. Broken white lines across the top of the screen. This is called overscan. You need to go into the Setup menu, other settings. 16:9 overscan needs to be on. Hope this helps.It solved our problem.
With TV off, enter the following on your remote:
Display > 5 > Volume + > Power
now you are in service mode
2 & 5 will take you up and down categories
1 & 4 will take you up and down settings within categories
3 & 6 will change the data up or down
So press 2 until you come to the 2170D_2 category
Press 1 until you get to HSIZ and change the data down to the required setting (different data registers for different width settings)
It could be more involved but this might do the trick in your case. Good luck!
Does's the set have a repair history? If it was previously serviced , the capacitor which is connected between the emitter and the collector of the horizontal output transistor transistor might have been changed with the wrong value, which would cause and overscan situation.The service menu for this set is even hard for technicians to use. It' my opinion if the service manual will not correct the horizontal width, the wrong capacitor was probably installed. Scrivitron (also these sets are known for the forementioned capacitor to short , flame or open.