Does Computer CRT's have a Service mode?

[xxxElectrostaticxxx]

I want to be able to tweak and calibrate my computer monitor (not just through the standard options they give) . I do this on a toshiba tv set for this you need to lower the volume to 0 while still holding the volume button you then press and hold 9 on the remote for a few seconds and the service mode will kick in giving access to everything you can possibly imagine.

I was just wondering if Computer Crt's have this ability as well.


Thanks

 

[imported_Kensai]

Not that I know of. But if you are going to open up your CRT. You better be careful, there's alot of electricity in there.

 

[xxxElectrostaticxxx]

Originally posted by: Kensai
But if you are going to open up your CRT. You better be careful, there's alot of electricity in there.

That is so true. I take plenty of precautions trust me.


Hmm, no service mode, how do the manufacturers calibrate the sets? Is it a CDrom service disk with programs on it to do that?

 

[xtknight]

Originally posted by: Electrostatic

Originally posted by: Kensai
But if you are going to open up your CRT. You better be careful, there's alot of electricity in there.

That is so true. I take plenty of precautions trust me.


Hmm, no service mode, how do the manufacturers calibrate the sets? Is it a CDrom service disk with programs on it to do that?

Yeah sometimes programs are used. But why? Is there a specific issue with your CRT you're wondering how to fix? I tried service mode on my Toshiba TV as well but there was a lot of stuff in there like aligning the electron guns that could screw the thing up forever. Take note the monitor's capactitors are still charged after the monitor is powered off. I think the only thing you'll find in the monitor it self is a focus dial or two.

 

[xxxElectrostaticxxx]

Originally posted by: xtknight

Originally posted by: Electrostatic

Originally posted by: Kensai
But if you are going to open up your CRT. You better be careful, there's alot of electricity in there.

That is so true. I take plenty of precautions trust me.


Hmm, no service mode, how do the manufacturers calibrate the sets? Is it a CDrom service disk with programs on it to do that?

Yeah sometimes programs are used. But why? Is there a specific issue with your CRT you're wondering how to fix? I tried service mode on my Toshiba TV as well but there was a lot of stuff in there like aligning the electron guns that could screw the thing up forever. Take note the monitor's capactitors are still charged after the monitor is powered off. I think the only thing you'll find in the monitor it self is a focus dial or two.

About the capacitor, yup I know. There are a couple of ways to discharge them however.

As for the Toshiba service mode, I made note of all default values before messing with any of them since there is no global reset to factory default and I keep that info page inside my Toshiba manual.

Actually, I don't need to fix anything with my computer CRT, but I'm working on a project and I need to tweak a few things higher than the default on screen menu will allow. Nothing I need to go inside the monitor for yet.

 

[HDTVMan]

Last I modified one it was analog controls within the casing but open and beware.

I was able to get to a control for focus. Saved buying a new monitor.

 

[xtknight]

Originally posted by: Electrostatic
As for the Toshiba service mode, I made note of all default values before messing with any of them since there is no global reset to factory default and I keep that info page inside my Toshiba manual.

Yeah, but the problem is, if you mis-set a setting, your display might be completely unreadable or fubar'd so you can't set it back. 🙂 Just make sure you know what the settings are doing. Generally (advanced) geometry options are bad to mess with as well as the electron gun alignment settings. But I don't think you'll need that stuff for calibrating, even for near-perfect calibration. By the way, check out http://www.eserviceinfo.com/ for some 'service manuals' used by servicers. These commands should be documented well in there. If you can't find one for your exact CRT then one by the same manufacturer should be fine, or even one by another manufacturer (just for general settings documentation). Usually the settings are called something standard used among lots of monitor manufacturers.

 

[xxxElectrostaticxxx]

Originally posted by: xtknight

Originally posted by: Electrostatic
As for the Toshiba service mode, I made note of all default values before messing with any of them since there is no global reset to factory default and I keep that info page inside my Toshiba manual.

Yeah, but the problem is, if you mis-set a setting, your display might be completely unreadable or fubar'd so you can't set it back. 🙂 Just make sure you know what the settings are doing. Generally (advanced) geometry options are bad to mess with as well as the electron gun alignment settings. But I don't think you'll need that stuff for calibrating, even for near-perfect calibration. By the way, check out http://www.eserviceinfo.com/ for some 'service manuals' used by servicers. These commands should be documented well in there. If you can't find one for your exact CRT then one by the same manufacturer should be fine, or even one by another manufacturer (just for general settings documentation). Usually the settings are called something standard used among lots of monitor manufacturers.

Thanks for the link xtknight. I'm going to check it out right now. The Computer CRT in question is my Viewsonic 19" G90f. I just need to play around with the contrast and brightness don't need to mess with any other settings right now.