chan@encore.UUCP (Jerry Chan) (11/06/87)
!!! HELP !!! I have been having problems getting my printer to work properly; up to now I have suspected the parallel printer port, but now I am not so sure. CONFIGURATION: * AT clone * NEC GB-1 graphics board w/parallel port used as COM1 * Toshiba P321SL SYMPTOMS: * When I hook up my printer w/parallel cable, space characters are incorrectly printed. So far I have seen this behavior as shown from the following table: Expected Actual Character Printed Sequence Sequence --------- -------- ] ] ] ] ]"]"]"]" M M M M M"M"M"M" m m m m m"m"m"m" = = = = ="="="=" n n n n n!n!n!n! These are the observed problems; there may be more which I had not run across. Needless to say, this wreaks havoc when trying to print out any document, esp. graphics printouts. * Swapping out the GB-1 board w/a monochrome Hercules-clone board w/printer port, same printer, same cable, *everything* works fine. ACTIONS TAKEN SO FAR: * Returned GB-1 graphics card to NEC for service *twice* -- they returned it the first time w/no problems found, and the second time they swapped it out on my request (no problem found the second time either). Swapped board has identical problem. * Swapped cable w/another IBM-centronix cable; no changes. * Performed an operation on cable (hardwired all grounds together on centronix side -- somebody tell me if I did a No-No; I didn't see any problem w/doing this and thought that a bad ground may have been the culprit) -- no changes. Does anybody have any clues? The confusing thing is that NEC insists that the board works, but the setup doesn't work w/the NEC but works with spare Mono board / printer port. NEC seemed to suspect the cable, but I checked the pinout on the AT side and they correspond to the pinout on the centronix side (after the operation :-); still no change. I am stumped... help, please? Pretty please ??? +----------------+ Jerry H. Chan linus--+ +--+-------------+ | Encore Computer Corp. necntc--| | | E n c o r e | | 257 Cedar Hill St. ihnp4--+-encore!chan | +-------------+--+ Marlboro MA 01752 decvax--| +----------------+ (617) 460-0500 talcott--+
wnp@killer.UUCP (11/09/87)
In article <2151@encore.UUCP> chan@encore.UUCP (Jerry Chan) writes: >!!! HELP !!! > (some stuff deleted) >Does anybody have any clues? The confusing thing is that NEC insists that >the board works, but the setup doesn't work w/the NEC but works with spare >Mono board / printer port. NEC seemed to suspect the cable, but I checked >the pinout on the AT side and they correspond to the pinout on the centronix >side (after the operation :-); still no change. > >I am stumped... help, please? Pretty please ??? How about taking your computer & printer to the NEC dealer, and ask them to DEMONSTRATE that it works - then demonstrate that it works with your spare printer port. I'm afraid I don't always trust assurances that something was checked out and works. Wolf Paul ihnp4!killer!wnp