[DECtalk] IAT Multivoice DECtalk

Arthur Elsenaar artelse at gmail.com
Fri Nov 11 12:14:54 EST 2016


Hi,

Am new to this list because I am attempting to repair an IAT Multivoice DECtalk from 1990.

The circuitboard had a number of defect capacitors that I replaced, and a broken voltage inverter. As I don’t have a schematic, tracing down other defects is becoming a challenge and am wondering if anyone here has more information on this machine. Judging on the regulators, I assume external power has been around 6-7Vdc.

I have the original DECtalk DTC-01 schematics which in broad lines are similar, so I have a good understanding of the workings.

The machine seems to boot, but it doesn’t output anything sensible on the serial port and no voice greeting like the Dt Express. My theory now is that the second processor, 87C51, responsible for serial comm. is at error. 

If anyone here as ["]any info, schematic? Please share!

Kind regards,

Arthur




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