Main > Monitor/Video Forum
Hanrarex polo 16:9 to normal 28 inch 4:3 possible? (SOLVED)
perjmolsen:
--- Quote from: princess prin prin on January 14, 2020, 12:29:37 pm ---Any sign of life from the flyback (high voltage, G2, heater, 200V)? The quick glow seen in the video could mean it's going in x-ray protection. Leave pin 4 of the TDA2593 out of the socket and see if you get a picture.
--- End quote ---
Hmm... Strange... when I remove solder from pin4, nothing at all happens when I turn it on.
No static at screen...
Put the solder back still the "white" washed out at the middle at the screen..
Can it be the vertical IC104 The picture is not collapsed, so it might not be it...
perjmolsen:
Not the vertical IC104 tda1675a - changed it to a new one still the same. :hissy:
Managed to take a quick picture this time, I am shutting it off quick.. (the picture you see below is also shaking)
I have also tested the caps below.. they tested ok, but changed them anyway
C144 1000uf 35V
C142 47uf 25v
C137 220uf 35v
perjmolsen:
I am thinking :laugh2:
Is there some resistors that I might have overlooked, that might be diffrent from 16:9 to 4:3
Ex a resistor that specify what type of CRT that is used?
perjmolsen:
SOLVED!!!!!!!!!!! :applaud: :applaud: :applaud: :applaud: :cheers:
Now I have solved the issue(s) :applaud:
1. the shaky/blurry image when i turned on -> solution, just turn the screen volt down on the fly. :laugh2: :banghead:
Then adjust the pot so the image fitted the screen.
2. When i got picture, it where to wide in the size, and playing with the pots, could not get it to fit.
C170 - I had put in a 330nf poly cap, swapped it to a 820 nf / 824J poly cap then the picture fitted the 25" inch screen.
3. Curved image, C175 I had put in a 22nf poly cap, put in a 12nf and no more curved image
:cheers: :notworthy: :notworthy:
princess prin prin:
Good but the picture is more expanded near the sides than in the middle because the value of C170 is too big. You may have to adjust the size coil or the coil may be different on this version.