(Topic ID: 182313)

DE Sega switch row 8 stuck on

By mavantix

7 years ago



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#1 7 years ago

Trying to diagnose a switch row 8 issue on my Baywatch. All switches in the row are locked on in switch test with CN10 and CN8 unplugged. So board issue. Reading here:

http://techniek.flipperwinkel.nl/desega/index3.htm#switch

It is talking about RB5. I don't see RB5 on my board. I have the RA16, and then it's pin 2 traces to R123. Anyone able to mark the spots I should test on this picture of my board? Thanks for the help!

IMG_1718 (resized).JPGIMG_1718 (resized).JPG

#2 7 years ago

Resistors seem to test accurately, so diode, capacitor, NAND or PIA? Opinions?

#4 7 years ago

So DC (or AC?) voltage from ground to the pins of CN10 should be 5V on each one? I pulled the board from the game and brought it home. Only test rig I have here is a Maverick which has the same board but previous gen (520-5003-03 vs. 520-5003-04), am I OK to swap this board into Maverick and power it up to test? (Maybe without coils, lamps, and switches plugged in?).

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