What version of the ROM's do you have installed in your machine? Are they from the L-5 set that is hosted on all the download sites? If so you may have the corrupt U22 image. I had the same issue with mine where most of the speech is just gone except for tilt and partial optical link. There is an extra image for the U22 ROM on the IPDB for the Pinbot. If you get that and replace U22 then your speech may come back too.

Robert

Where did you get the set of L-5 ROM's from and what images were they made from? So far every ZIP file I have seen with the L-5 images seems to have the same corrupt (bad) image for U22. The first part of that ROM image is zero'd out. On the IPDB page here:

http://ipdb.org/machine.cgi?gid=1796

Someone posted a separate ZIP file for U22 which does contain a good image for that ROM. So, if you burn that and swap out U22 then you may fix it. I had the same issue and was looking for other problems because I assumed that L-5 image set was good when in fact it wasn't. From searches the forum I see references to others that ran into problems as well.

Robert