Electronics > Repair

What more i can do?

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222Lab_Test222:

--- Quote from: Harry_22 on November 26, 2024, 03:49:54 am ---Also please do the following.
Don't touch DIP switches but only measure and compare the voltages.

SW2 and SW4

--- End quote ---

Its High Voltages 5V

222Lab_Test222:

--- Quote from: Harry_22 on November 26, 2024, 03:38:51 am ---Please print a traces from OE at the same scale.
Working ang non-working

--- End quote ---
ITS HERE

Harry_22:
Make a photo of EPROMs including Dip switches of both boards

222Lab_Test222:

--- Quote from: Harry_22 on November 26, 2024, 06:25:47 am ---Make a photo of EPROMs including Dip switches of both boards

--- End quote ---
Good

222Lab_Test222:
Bad
Only difference is Bad board SW4  4 pin is changed because it is the beep one, If it is turn on it keep beeping so

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