Problems with rev. 3 board (not including pre-me problems) ========================================================== Roy Stedman : 10JUL92 Symptom Problem Solution ----------------------------------------------------------------- --- Board 1 Doubling characters siz0, siz1 shorted unshort (or uds, lds) System would not come exp board jumper was add jumper up (DMA's hang) not present No Sound Audio caps can short unshort out 9v or 5v to ground. (no solder mask) ASCO CODEC shuts up undetermined use Crystal part occasionally while playing. Static/garbage on ASCO codec only use Crystal part audio output with bad sample rates. DSP failiures solder short under SRAMS unshort (RAM 200200, Not Exec. SSI) DSP SSI failed R101 R60 not connected touch up. --- Board 2 No video (stripes) series resistor on VINT not install properly Video Address counter installed properly didn't count Doubling characters A0 shorted to pullup unshort Speaker not playing R122 not installed install FPU not working Open etch on u33-37 close