Daytona USA memory test question

bluestreak

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When perfroming the memory test as soon as it hits IC 12 it shows this on the screen until the test is over, then comes back and shows all IC's as good.
Is this normal?

Also, occasionaly when exiting the test menu, the machine will lock up and display "backup Ram Access Error". Anyone know what board that is located on?
 

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backup ram access error usually caused by a drop in power supply voltage. check those output voltages from power supply with voltmeter (tap it at filter board).
 
When perfroming the memory test as soon as it hits IC 12 it shows this on the screen until the test is over, then comes back and shows all IC's as good.
Is this normal?

Also, occasionaly when exiting the test menu, the machine will lock up and display "backup Ram Access Error". Anyone know what board that is located on?
FYI, It's normal to get garbage on the screen when performing the memory tests according to Ken at IrepairSega.com.
Just as long as they finish with a testing of "good"
Just a follow up for anyone else that might have this question.
 
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