The NEW Build Your Own Arcade Controls

Main => Monitor/Video Forum => Topic started by: solocon on December 15, 2018, 09:14:58 pm

Title: CRT Screen
Post by: solocon on December 15, 2018, 09:14:58 pm

Only had the system for about a week. Screen is a Neotec NT-35C.

Title: Re: Having CRT Screen issues
Post by: grantspain on December 16, 2018, 05:23:55 am

have you tried adjusting horizontal hold?

Title: Re: Having CRT Screen issues
Post by: nipsmg on December 17, 2018, 06:01:46 am

This definitely looks like an HSync issue to me as well.  Although it’s odd that it happens after a certain amount of time.  I wonder if that points to a bad cap or something?

Title: Re: Having CRT Screen issues
Post by: big10p on December 17, 2018, 06:06:55 am

Quote from: nipsmg on December 17, 2018, 06:01:46 am

This definitely looks like an HSync issue to me as well.  Although it’s odd that it happens after a certain amount of time.  I wonder if that points to a bad cap or something?

Common enough problem if the hsync is set right on the cusp of being out of sync. Fine when it's cold, but when things warm up, it goes out of sync.

Title: Re: CRT Screen
Post by: lomoverde on January 23, 2019, 11:20:57 am

Could I ask how this problem can be fixed. I’ve been running crt emudriver for a while now with a hd2400.
I’ve switched to a different pc, a hd6450, same cable same grundig crt tv, relevant driver and I cannot get it right. If the tv has been off a while it’s ok for about 2 mins then starts flickering and rolling like mad. I’ve battled with this for 2 days now, and seem to be going round in circles.

Title: Re: CRT Screen
Post by: Mike A on January 23, 2019, 11:28:02 am

Did you try the horizontal hold yet?

Title: Re: CRT Screen
Post by: lomoverde on January 23, 2019, 12:53:15 pm

Ok so you’ve stumped me already, this is only my second go at crt emudriver. Unfortunately my first attempt went without a hitch so I didn’t have to leave the tutorial.  Is h hold a physical setting on the tv? I’m assuming it will involve taking the back off if it is? I no longer have the remote. I don’t understand why the other pc would work fine.

Title: Re: CRT Screen
Post by: Mike A on January 23, 2019, 01:02:43 pm

It is a physical knob. It will be labeled. If you don't know what horizontal hold is you probably shouldn't be poking around an arcade monitor without help. There are some guys who really know their stuff here. Hopefully someone can chime in and direct you safely.

Title: Re: CRT Screen
Post by: buttersoft on January 23, 2019, 05:40:29 pm

Quote from: Mike A on January 23, 2019, 01:02:43 pm

It is a physical knob. It will be labeled.

A newer TV won't have a knob.

Title: Re: CRT Screen
Post by: Mike A on January 23, 2019, 06:30:46 pm

I thought he was dealing with an arcade monitor.

Title: Re: CRT Screen
Post by: Paradroid on January 29, 2019, 04:23:53 pm

Quote from: lomoverde on January 23, 2019, 11:20:57 am

I’ve switched to a different pc, a hd6450, same cable same grundig crt tv, relevant driver and I cannot get it right.

What kind of wiring does your VGA to SCART cable have? Separate H & V sync of composite sync?

Title: Re: CRT Screen
Post by: lomoverde on January 30, 2019, 06:44:04 am

I’m not sure about that sorry. I bought the cable from a retro store on eBay. It has the vga on one end, scart on the other obviously. A audio jack and a molex connector. I’ve switched back to my other pc with the hd 2400 card and it’s rock solid on my crt. Bought a remote from eBay for the tv and have been able to adjust geometry slightly and all looks great.
My problem with this setup is running groovymame as administrator. Attract mode won’t launch games and I’m assuming it’s because of administrative issues.