Omega Race power issues: help sorting through the muck.
ELutz has been helping me work my way through my current Omega Race power issues, but I thought that to keep the progress-status contained, I'd start a new thread unique to this machine.
Currently, on power-up, I have the following:
1. linear PS is showing 12V at the 12V cap, but 5V cap is no longer registering 5V (reads 0)
2. the resistor at location R20 showing no voltage when game is on, but shows 163 ohms
3. the big cap at the bottom of the linear PS showing no voltage
4. the 3-pin connector at the bottom of the linear PS showing no voltage
5. upper "Omega Race" marquee lights at top front of game, coin lights are lit, waistline marquee was lighting until I just started messing with the fuses in the power brick. See below.
6. I do not have any game boards hooked up currently in the game.
In the power brick are 5 fuses: 3 mounted on the base of the brick, and 2 over top of the caps (that look like big blues); the 3 mounted on the power brick are a 2A slow blo, and in a 2-fuse holder are 3A slow blo and .5A slow blo. I had checked all 5 of the fuses that were in these locations as of last night (pulled each one out and tested continuity), and all 3 were good. However, as mentioned, there is no power going to the linear PS via the 3-pin connector.
To start fresh, I pulled all 3 fuses and put brand new ones in today. I powered up the machine and saw a brief spark at the 3A fuse location, everything else that was working before is still working, with the exception of the waistline marquee now. If I check voltage across the 3 fuses mounted on the power brick, the only one showing voltage going across it is the .5A fuse, which is registering approx 30V AC. The other 2 show 0.
Is my best bet to start by replacing the single and dual-fuse holders on this game? God I wish a switcher was produced for this thing!!!
(here is where ELutz has been helping to date: http://forums.arcade-museum.com/showthread.php?t=156256)
ELutz has been helping me work my way through my current Omega Race power issues, but I thought that to keep the progress-status contained, I'd start a new thread unique to this machine.
Currently, on power-up, I have the following:
1. linear PS is showing 12V at the 12V cap, but 5V cap is no longer registering 5V (reads 0)
2. the resistor at location R20 showing no voltage when game is on, but shows 163 ohms
3. the big cap at the bottom of the linear PS showing no voltage
4. the 3-pin connector at the bottom of the linear PS showing no voltage
5. upper "Omega Race" marquee lights at top front of game, coin lights are lit, waistline marquee was lighting until I just started messing with the fuses in the power brick. See below.
6. I do not have any game boards hooked up currently in the game.
In the power brick are 5 fuses: 3 mounted on the base of the brick, and 2 over top of the caps (that look like big blues); the 3 mounted on the power brick are a 2A slow blo, and in a 2-fuse holder are 3A slow blo and .5A slow blo. I had checked all 5 of the fuses that were in these locations as of last night (pulled each one out and tested continuity), and all 3 were good. However, as mentioned, there is no power going to the linear PS via the 3-pin connector.
To start fresh, I pulled all 3 fuses and put brand new ones in today. I powered up the machine and saw a brief spark at the 3A fuse location, everything else that was working before is still working, with the exception of the waistline marquee now. If I check voltage across the 3 fuses mounted on the power brick, the only one showing voltage going across it is the .5A fuse, which is registering approx 30V AC. The other 2 show 0.
Is my best bet to start by replacing the single and dual-fuse holders on this game? God I wish a switcher was produced for this thing!!!
(here is where ELutz has been helping to date: http://forums.arcade-museum.com/showthread.php?t=156256)
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