Adteroids Deluxe Graphics glitch - With youtube Video

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Adteroids Deluxe Graphics glitch - With youtube Video

I created a new thread in the monitor area because I think I have narrowed the issue down to the monitor.

Troubleshooting so far..
Checked board in known good cab, no issue.
Checked voltages, were all good
Swapped AR board, same symptoms
Swapped Big Blue with new Big Black, same symptoms
Swapped Asteroids board, similar issues with vector tearing

Here is a short video I shot to demonstrate what exactly is going on.




EDIT: Problem solved *DB100 bridge rectifier* Once I noticed the fuses blowing it was much easier to track the source of the problem. Pulled DB100 and it was faulty. Swapped with the one on the other chassis and all is well.

I didnt even think to look for a fuse since it was working for the most part. Guess that should be a lesson to me...
 
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A little more information.

If you replace 5A slow blow the fuses at f100 and f101 and power it back up both fuses blow right away. You can then replace f100 leaving f101 blown and get the same vector errors.

Maybe the DB100 bridge rectifier?
 
A little more information.

If you replace 5A slow blow the fuses at f100 and f101 and power it back up both fuses blow right away. You can then replace f100 leaving f101 blown and get the same vector errors.

Maybe the DB100 bridge rectifier?

from the B&W Vector Monitor FAQ:

"Symptom: Fuses F100 and F101 blow on powerup. Test the diode bridge (DB100) with the monitor unhooked from the power input. The diodes take the AC and convert it to DC. If one or more are shorted you will get blown fuses. The diodes, or legs of the bridge should conduct one way, and be open the other way. Verify that b+ and b- are not shorted to ground. If the diodes are all good, both fuses should blow if there is a short. Check C100 and C101 for shorts. If one or the other measures shorted, unplug the chassis output transistors and try again. The output stage transistors should be 2N3716 for Q708 and Q608 and 2N3792 for Q709 and Q609. Make sure they are the correct type, and make certain the transistors have the mica insulators installed. If C100 and/or C101 is still shorted, remove the shorted capacitor(s) and check to see if the fuses still blow. If C100 and/or C101 are not shorted, it could be an overload in the output stage. Unplug the yoke and power up the monitor without any input from the game board. Measure the voltage from chassis to F700 and F600. It should be close to zero. If it is as much as 10 volts it's not a problem (with the yoke unplugged the feedback loop isn't what it should be). But if it reads something like 40 volts you have a bad driver stage. Look for Q706 to be shorted. It is a MPSU57."

My GUESS is C100 and C101. If it is not these at least they then will be replaced with new ones.
Did you re-flow all the header pins on the deflection board?
 
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Problem solved *DB100 bridge rectifier* Once I noticed the fuses blowing it was much easier to track the source of the problem. Pulled DB100 and it was faulty. Swapped with the one on the other chassis and all is well.

I didnt even think to look for a fuse since it was working for the most part. Guess that should be a lesson to me...

-Ken
 
Problem solved *DB100 bridge rectifier* Once I noticed the fuses blowing it was much easier to track the source of the problem. Pulled DB100 and it was faulty. Swapped with the one on the other chassis and all is well.

I didnt even think to look for a fuse since it was working for the most part. Guess that should be a lesson to me...

-Ken
 
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