There is one other thing I should mention: Given a page that induces a printer error, that page can be printed to a postscript file and the resulting postscript file can be successfully printed from the command line.
That page can even be printed to a pdf file, then converted to ps with pdftops and printed from the command line. However, the pdf file itself cannot be sent directly to the printer. Nor do I have the ability to learn anything from the pdf file as it appears to be binary. Thanks for taking time to read. Mark