Flash Gordon
Bally, 1981You're currently viewing posts by Pinsider joydivision.
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Quoted from jj44114:If you have garbled speech on only some the call outs it probably one of the roms that’s the issue. If the speech chip is bad it’s usually no speech or all the call outs are distorted.
If R9 is out of spec it can also cause garbled speech as well - worth checking the value with the schematic.
Quoted from jj44114:The tms5200 might not be the problem anyway. If you have some speech garbled and some clear it’s often one of the roms that’s bad. In my experience if the tms5200 is bad, all speech is garbled.
Do you mean the same speech is either garbled or clear every time repeated over & over, or random garbled speech?
I guess if it's the same speech effected every time it would be a ROM.
I installed a variable resistor in place of R9 to see if R9 was the cause of garbled speech I was getting quite a bit - R9 was only slightly out of spec. I could change the speech speed from fast to slow (which is fun to play around with) but set a some frequencies it would garble the speech quite a lot & other frequencies not at all adjusting within the acceptable range of normal sounding speech.
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Quoted from barakandl:$25
http://www.arcadeshop.com/i/1487/tms5200nl-speech-synthesizer-chip.htm
$100 for 10pcs if you are willing to do the aliexpress gamble.
https://www.aliexpress.com/item/32987984465.html
C15 looks original and the original ones are almost always failed. The three diodes below it get quite warm which cooks that capacitor.
And a lessor known source - love the nice quote on quality from their description!
"The current batch is from September 1981 and was stored in an air-conditioned warehouse and each bar is individually sealed with dehumidifying granules in ESD bags. These TMS5200NL come in the best quality we've ever had from these ICs"
https://coinop.mally.eu/produkt.php?bestellnr=102650&details=1
Just to add another source of TMS5200nl chips in case the other couple of suppliers sell out.
Looking at the same page I see Jennings have some UDN7180A IC's at a good price of $16.00 for Williams games - they are impossible to find with only 1 other supplier that has genuine NOS chips.
Quoted from bluebomber:I just resolved an issue with all of the speech being garbled on my Flash Gordon's Squawk & Talk. I had replaced the capacitors and pots about two years before, so I tried replacing the old chip sockets. That didn't seem to help. I ordered two new PIAs and a TSM5200NL to troubleshoot. I tried the PIAs first, and they fixed my issue!
That's good you fixed the problem, also good to know a PIA can cause this too. Doesn't hurt to have a spare TMS5200 chip on hand for the future.
Was either of the old PIA's the AMI brand? As that particular brand are known to fail a lot.
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Marion, MA