Tech Tips
EEProm Error Isolation on PostScript Printers

Symptoms:

1.) Erroneous copy counts on status sheet or resetting copy count
2.) Erroneous baud rates displayed,  margins shifting after power
    down situations.
3.) Random status sheets-status sheets ejected for no reason.
4.) Printer stopping in middle of job and ejecting status sheet.
5.) Occasional problems of not getting a status sheet on initial
    power up.
6.) Any persistent parameter that is altered after a power down 
    situation.

Resolution:
    
    If any of the error states above have occurred, it may indicate 
that the EEProm is weakening in the controller.  The EEProm is a
non-volatile Ram chip and is similar to a battery back-up in the
respect that it stores certain information that is to remain in
memory while the machine is turned off such as the copy count, margin
settings, communication protocols and more.  This error can be cor-
rected by replacing the EEProm which is a socketed component on the 
QMS controller board.  On the QMS PSJet+, PS800+, PSJet, and PS800
model printers,  the EEProm is located at U33 on the controller board.
On the PS800II model printers,  this chip is located at U39 and on the
PS810 will be located at U27.  There are two chips which are commonly
used and are interchangable between the units.  These two components
are the EEProm and the ZPRam.  The PS810 however, uses only the ZPRam
component.  These parts can be obtained through an authorized TLC/QMS
dealer and the part numbers are as follows:

EEProm  : 1330114.0000
ZPRam   : 1330157