The Aussie Pinball Arcade

Aussie Pinball Forums => Technical Matters => Pinball Repairs / Problems & Assistance => Topic started by: bigdaddy on June 05, 2009, 07:32:50 PM

Title: Sega/DE sound board issue
Post by: bigdaddy on June 05, 2009, 07:32:50 PM

Wondering if anyone has fixed a DE sound board. My Frankenstein has crapped itself and the two (PAL16L8) chips are hot as hell when the machine is on..no sound coming through the speakers. pinrepair advises changing these chips over, but they are custom programmed. Checked out the stern site..no luck there. Anyone got any ideas on how to program or where I can source them easily???Anyone got a working board they would sell..may be cheaper??

Title: Re: Sega/DE sound board issue
Post by: humpalot on June 05, 2009, 07:44:22 PM

You can download the images for the pals here http://www.ipdb.org/machine.cgi?gid=2358

Did your machine have a lot of static/noise coming through the speakers prior to the sound going?

Title: Re: Sega/DE sound board issue
Post by: bigdaddy on June 05, 2009, 08:38:20 PM

No Just stopped working. All you get now is low hum in the speakers. Voltages are good. That link takes you to the ROM's for programming sound chips, but not the AL16L8

Title: Re: Sega/DE sound board issue
Post by: humpalot on June 05, 2009, 08:51:13 PM

The U19 and U20 sound chip images are there, these are for the chips that you mentioned.

Title: Re: Sega/DE sound board issue
Post by: bigdaddy on June 07, 2009, 03:04:49 PM

So they are...your very good you know that.

Title: Re: Sega/DE sound board issue
Post by: pinballahq on June 07, 2009, 05:48:26 PM

To program PAL chips you need a PAL programmer, a standard EPROM programmer will not work.
I use a Logical Devices PALPRO-2X. Ive done PAL's for the DMD display boards previously, never had the need as yet to do the ones on the sound board. Let me know if you want help.