Main > Monitor/Video Forum
Are flat CRTs crap? I bought a flat WG 9800 and I kinda hate it! :)
lilshawn:
oy vey
look at the datasheet for the TDA9112, the IC chip that is responsible for carrying the entire screen deflection. it has like 5 pages of waveforms showing what has to happen when you change something like the H-size or the pincushion. maybe something in there will let you know what you need to adjust to get your LCD looking fine.
as for the menu, To enter the factory menu turn the monitor off. Hold the buttons 'OSD' and 'Key +' and turn it on. be warned, you can seriously mess stuff up in here to the point you cannot see the menu to even change it back. then you are looking at an EEPROM swap.
brandon:
based on what you said, I probably couldn't put this chassis on a different curved tube because the deflection circuit or the EPROM is "programmed" for a flat tube. I may try a factory reset and see if the previous owner screwed it up. I found a D9200 a few hours frome but its a flat tube as well and I'm reluctant to buy another one.
brandon:
i made some great progress getting the geometry acceptable in the service menu but the minute i switch to a different resolution it's WAY off. i guess these are global settings maybe? it doesn't seem to save per resolution in the service menu.. I'm starting to think I'll have to just set the monitor up for one resolution and leave it. Ditch GroovyMame :-/
Zebidee:
Wow, that really is a wide screen. No wonder it gets a lot of distortion.
I've got a couple of small 21" flatscreen TVs (Sony + Sanyo) circa 2005 with component inputs that look good, geometry is perfect or at least close to. Tested with Groovymame and PCBs via GreenAntz.
Like that infographic explains, flatscreen geometry errors are a bigger issue for larger/wider screens.
brandon:
the photo uploaded weird.. it's not a wide screen. lol i can live with the geometry now that I have more controls with the service menu. i just have to figure out why adjusting it correctly at one resolution completely ruins it on the others.