Because of an accidental solder bridge [that I put] between the +5 & 10 V buses on the underside of the parent board I fried the PROM IC, U201 [P/N 3040082] on the digital control board. Everything else appears OK but all the PROM outputs stay low although the enable-not input is low & the [4] band select inputs are changing state properly. I need to get another [properly programmed] PROM, another 02 board or the truth table for this PROM so I can possibly hard wire something in its place. I've looked for R7/TR7[A] parts on EBay but all I could find was a complete R7 for over $1200. I'm not sure if the digital control boards for an R7 & a TR7 are the same; I've been told both that they were & also that they weren't so I'm not certain. Does anyone have these parts for sale of a truth table for U201? [I may need to disclose my e-mail address if there's no other way make contact.] Thanks in advance & regards.
Dave _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
