Bally Turbo cheap squeak. sounds muddled - Fixed

[AlfonsoB]

Removed the cap at C30 on my turbo cheap squeak which is suggested as good preventative maintenance
on pinwiki. It was also in a service bulletin from Bally.

Board boots fine and sounds okay but the sounds are wrong.
The board is choosing the incorrect sound.

Tried a replacement ad7533 which made no difference.
Factory reset the pin (strange science 6803) and set the sounds back to otion 3.

I've googled but havn't found a solution.

Any ideas?

Thx AL

 

[stevebm1]

could the fault be the mpu sending the wrong signals to the sound board?,also check your connections,if your one pin out it could cause incorrect sounds

 

[BigIan]

It’s not one of the dual rom jobbies ?

 

[AlfonsoB]

It’s not one of the dual rom jobbies ?

?

 

[AlfonsoB]

could the fault be the mpu sending the wrong signals to the sound board?,also check your connections,if your one pin out it could cause incorrect sounds

Thanks,

The issue only appeared after I took the cap out of the sound board. I'll resolder the sound board pins later and see if it helps.

 

[BigIan]

?

I vaguely remember an issue with one of the squeak boards that had dual sound roms and you needed to swap jumpers around to select which sound package you wanted to use.

might be a red herring though, it is a vague memory and ive slept since that...

 

[AlfonsoB]

Thanks Steve & Big Ian.

Got it sorted out last night. More luck than anything

For someone searching old threads to find a fix.

Turn on game. Take out the Keypad.

Press Game + enter together (or try holding game button for a few seconds). The machine will chime and score display should change.
Then press the numbers 1-9.
each numbered button press should emit a different sound. I went through all of them.
hit exit.
Turn machine off for a minute and then back on.
This worked for me.
Play a few games. The intial game was better but subsequent ones seemed to fix the sequencing.

Had read an old post where someone had tried cycling sound otions 1-3 and a factory restore with no luck
but after navigating some other non sound related menus it restored itself.