texasmame
Well-known member
The AR is fine - 6.6v to 4.2v range and it's adjustable.
The 5v regulator on the PCB tests fine.
The 5v testing at the test points on the AR is fine there. When the edge connector is placed on then it's tried again, the voltage drops to about 1.3v at both the test points on the PCB and the AR.
Tried the sense mod on the AR J7 (tied pins 1 to 2 and 4 to 6) - no difference.
Ran a 5V from the test point on the AR to the test point on the PCB, same for the ground - same voltage drop to about 1.3v. Cut the lines for the 5v on the edge connector and left the direct connections - same drop.
So, doesn't seem to be the edge connector on the PCB, at least at the 5v and ground sections. They've been cleaned well and the edge connector itself and there's no evidence of burning at all. Even running 5v and ground directly test point to test point ONLY (no edge connector at all) - still get the voltage drop once the game gets turned on.
Of course can't get in to test mode, P1 and P2 buttons are dead as well.
Anyone local have another PCB for testing or any suggestions?
The 5v regulator on the PCB tests fine.
The 5v testing at the test points on the AR is fine there. When the edge connector is placed on then it's tried again, the voltage drops to about 1.3v at both the test points on the PCB and the AR.
Tried the sense mod on the AR J7 (tied pins 1 to 2 and 4 to 6) - no difference.
Ran a 5V from the test point on the AR to the test point on the PCB, same for the ground - same voltage drop to about 1.3v. Cut the lines for the 5v on the edge connector and left the direct connections - same drop.
So, doesn't seem to be the edge connector on the PCB, at least at the 5v and ground sections. They've been cleaned well and the edge connector itself and there's no evidence of burning at all. Even running 5v and ground directly test point to test point ONLY (no edge connector at all) - still get the voltage drop once the game gets turned on.
Of course can't get in to test mode, P1 and P2 buttons are dead as well.
Anyone local have another PCB for testing or any suggestions?
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