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Main => Monitor/Video Forum => Topic started by: mikew72 on July 08, 2022, 11:05:34 am

Title: H Sync issue
Post by: mikew72 on July 08, 2022, 11:05:34 am

I have a JAMMA cabinet with a 25" intervideo standard resolution monitor in it.

When first powered up, the horizontal sync always needs adjusting to get a stable picture.  Once adjusted, the image is fine until turned off and left for a while.  Next time it's turned back on it will need adjusting again.

I've tried it with my NEOGEO, a PC/JPAC and a Pacman clone JAMMA board.  It's the same on all so I'm fairly confident it's an issue with the monitor, though I can't rule out the JAMMA harness.

The monitor dates from 1992 so I was thinking of giving it a recap, but I was also wondering if the potentiometer on the adjustment board may need replacing too?

Mike

Title: Re: H Sync issue
Post by: grantspain on July 08, 2022, 11:47:54 am

wise to do all you mentioned, check for bad solder joints as well

Title: Re: H Sync issue
Post by: Mike A on July 08, 2022, 12:27:21 pm

Quote from: mikew72 on July 08, 2022, 11:05:34 am

I have a JAMMA cabinet with a 25" intervideo standard resolution monitor in it.

but I was also wondering if the potentiometer on the adjustment board may need replacing too?

Mike

Mark the position of the pot. Squirt it with deoxit. Turn it back and forth a bunch to clean it out. Fire the monitor back up and see if that helps.