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triforce7770

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Jun 9, 2021
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Have a NBA JAM TE sound board that's not getting any sound unless I max the pot and get a slight hum. Sound IRQ Passes and still no sound
Things I done so far
*getting proper voltage to the board and 5v to main board
* sound board recap including axials from arcadepartsandrepair
* RIbbon cable is matching red side pin 1 to pin 1 each side.
* Ran hand under amp and getting feedback
* Re burned U3, U12, U13 (U12 and U13 were masked and U13 tested bad when i verify with my gq4x4)
* Changed all op-amps ( lm324, both tlc048n's)
* Changed am31's and am32's
* Oki chip looks fine no corrosion seen and traces test fine.
* Have a 50k audio taper pot installed
*Changed Clock Crystal
 

stj

Grand Master
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i thought that era of games had digital volume control in the settings??
 

Asure

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Jul 24, 2015
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This one uses a pot.
Show your wiring harness for the sound board plz..
 

triforce7770

Student
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here are my pics of the main board and sound board and the wiring as well.
 

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