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Centaur Speech Call Outs Missing- fixed the fecker

stevebm1 said:
im surprised no one has designed a board that emulates the tms 5200 or allows for custom sounds/speech to be added to the original roms for these classic bally games
Click to expand...

When my supply of nos tms5200 ics runs out then I may look into more. I did look at it awhile back before I found a new ic supplier for rare ics
 
@Poibug

another thought this morning as I start my shed re roof. 😂

disconnect j4 temporarily off the power driver board and see if anything changes. The sound select lines are shared with the solenoid select ones.

Of course when doing this the solenoids won’t work in game
 
Think I've fixed the little fecker.
After putting board back in I initially got the Centaur callout.Then it went.
I applied to pressure to J1 connector and it would sometimes work.
Decided to change the header pins, I had reflowed them but had some header pins here, so thought may as well.

Then after changing headers did continuity check.Thats when I found it, as J1 pin 1 had bad continuity.
A cracked trace between J1 pin 1 and it's destination , a resistor from U16.
Decided to put in link wire, and touch wood, all good now.
Just goes to show, one little invisible crack causes so much grief.
So lesson for anyone who ever sends a board for repair but think they get an excessive bill.
Kudos to all who offered help.
Especially @myPinballs as, he had sorta guessed right, as he had mentioned U16, , and this trace did go to that.

All the faff in changing the caps, initially has been worth it.

1. The caps fixed the horrible mains style hum I had.
2. Fault finding allowed me to prove that some of my spare parts are , in hindsight, now good.
3. I changed J1 connector which I have hummed and haad about doing for ages. So job done.
4.This job has incentivised me to start doing preventative maintenance 're caps on a few of my games. I have plenty 30 plus years old.. ive started replacing caps on Ramones , Tx, Robo war etc.
25 years let alone 35, 40 is ancient for a cap
5.Realised that jumper was in disabling the reverb board, I hadn't even realised!
5. I've learnt stuff
6. This awesome forum, is, erm, awesome
7. I found corrosion and fixed cracked pins on my speech chip, and replaced the crap socket
8. Having all these spare parts comes I handy, new I bought the crap for a reason!
 
Last edited:
Poibug said:
Think I've fixed the little fecker.
After putting board back in I initially got the Centaur callout.Then it went.
I applied to pressure to J1 connector and it would sometimes work.
Decided to change the header pins, I had reflowed them but had some header pins here, so thought may as well.

Then after changing headers did continuity check.Thats when I found it, as J1 pin 1 had bad continuity.
A cracked trace between J1 pin 1 and it's destination , a resistor from U16.
Decided to put in link wire, and touch wood, all good now.
Just goes to show, one little causes so much grief.
So lesson for anyone who ever sends a board for repair but think they get an excessive bill.
Kudos to all who offered help.
Especially @My, as, he had sorta guessed right, as he had mentioned U16, , and this trace did go to that.

All the gaff in changing the caps, initially has been worth it.

1. The caps fixed the horrible mains style hum I had.
2. Fault finding allowed me to prove that some of my spare parts are , in hindsight, now good.
3. I changed J1 connector which I have hummed and haad about doing for ages. So job done.
4.This job has incentivised me to start doing preventative maintenance 're caps on a dew of my games. I have plenty 30 plus years old.. ive started replacing caps on Ramones , Tx, Fobo ear etc.
25 years let alone 35, 40 is ancient for a cap
5.Realised that jumper was in disabling the reverb board, I hadn't even realised!
5. I've learnt stuff
6. This awesome forum, is, erm, awesome
7. I found corrosion and fixed cracked pins on my speech chip, and replaced the crap socket
8. Having all these spare parts comes I handy, new I bought the crap for a reason!
Click to expand...


I claim my free drink ;) I think i did mention the sound select lines of which J1-1 is one of them mate at the start (post 5 - see below), before we moved on to the U16 ic!!. Glad you sorted it and this is now solved. It was always going to be a sound selection problem. :) I guess i should have been more specific in checking the traces up to u16 to.

myPinballs said:
Have you double checked your j1 connector in case you dislodged something? Especially the pins 1-4. The data ‘word’ sent from the cpu to the sound board that tells it what to play is sent via j1 and the bits for it are pins 1-4
Click to expand...
 
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