Recent content by OldWilly

Space I think you have room for one more on there :)

That problem is IC 103 a 24c02 Have seen it several times. My first instinct in both cases was to replace the KA2500 a $35 chip but it ended up being IC103 both times. The symptoms are as you described.... nice bright OSD but dim or no video.

Check R102 2.76 ohms @ 7 Watts

Video ground Try shorting pin 14 on the jamma harness to ground on the jamma harness and see if that helps. It is possible that ground to the monitor in your jamma cabinet is fed through the board and you may have fried that trace. By shorting video ground (pin 14) to power supply ground you...

Crisis Zone to Big Buck Hunter Open Season Conversion The before shot is a picture I found on the internet as I never took a photo, but the cabinet was identical. After gutting the cabinet, removing the mirror system and mounting the monitor in an upright position, installing the electronics...

Set all your color adjustments to about half, then measure the voltage on the collector of each color transistor, if they are all about the same, you have a bad CRT,

If degaussing didn't help it is possible the yoke has shifted or the purity magnets are broken (missing) or out of adjustment.

The short answer is no. While crts are often interchangeable you need to be careful with deflection yokes when swapping chassis of different models. I'm not saying it's impossible in every case... just you need to be sure of what you're doing and have all the data on the chassis' available...

Some monitors require high temp (105 degree) caps and replacing those with lower temp (85 degree ) caps will just cause issues down the road. There is no harm using high temp caps to replace the lower temp ones. I will sometimes use a higher temp cap even though it was not original if the cap...

Good news.... Without a pic it's hard to say, but check if there is a field ground on your monitor frame and remove it is there or try adding it if it's not there... I've seen them cause issues. Also if you are using an iso transformer make sure it's not mounted too close to the monitor. Your...

Hard to tell, but it looks a bit from your middle pic that you may have foldover, which sometimes makes the top of the screen look a bit brighter. Try reducing the vertical height and see if it goes away.

yep, bad caps on a MB can cause non-boot issues.

You can just flip the horizontal and vertical yoke connectors to invert the video and use a single monitor.

On your board set #834-0086 pin 14 should be composite sync. There were several different frogger boards and the wiring was different. Board set 834-0086 Red = pin R (red) Green = pin P (green) Blue = pin 13 (blue) Ground = pin U (black) sync (comp) = pin 14 (wht/blue) sync (vert) = pin N...

Yeah, for the cost you're better off ordering them both, but my bet is the IC, since you have neither vert or horz sync.