🚀 go-pugleaf

For several months I have been printing in duplex mode to a HP LJ5M 
postscript printer.  Recently it stopped and I'm unable to get duplex mode 
back - all printout is standard single-sided.  The problem is common to 
several PCs (Wkgrps 3.11 and Win95) and a Mac which share the networked 
printer.  There are no error messages or other indications of abnormality.

The story so far:
1.  Duplexing stopped, but initially I thought that I'd just disabled the     
    setting in the printer configuration.  Actually I hadn't.
2.  I reinstalled the printer under Win 95 and Wkgrps 3.11 (I have 2 PCs), but 
    the problem persisted.
3.  I then thought that the duplexing unit could be faulty.  It tests OK     
    and duplexing works if pre-selected via control panel of printer.  I can't 
    leave the printer in that mode as not all printout is wanted as double 
    sided.
4.  If the printer is set to PCL or auto-recognise and the PCL driver         
    installed on both the Win95 and Win3.1 PCs, duplexing works.  This is not 
    really a fix as auto-detect sometimes fails tp properly detect postscript 
    jobs and prints, rather than interprets the print stream.  Other   
    applications expect Postscript.
5.  By printing a test job for both duplex and simplex to files and comparing 
    them, the select duplex/simplex Postscript commands can be identified -   
    the printer just ignores the duplex instruction.
6.  Under heavy use by several users there doesn't seem to be any other     
    feature which is not working properly on the printer - just the ignoring 
    of the software selected duplex option.

Can any HP or Postscript wizzes cast some light on this and suggest a fix.  
(the support call to HP is still "open" - no help there).

Thanks,
Paul


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Paul Clayton                            Tel: +61-8-8303-8408
Urrbrae                                 Fax: +61-8-8303-8550
South Australia
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