Xerox 1235DT - Phaser Color Solid Ink Printer Service Manual page 16

If the printer is equipped with multiple trays loaded with the same-size paper, the
printer will switch to an alternate tray as a paper source when a tray runs out of paper.
After being idle for the selected amount of time the printer switches into its Energy
Star mode where it consumes less than 45 watts of power. It "awakens" upon
receiving data at any of its ports.
Proof Jobs. A proof job is a specific case of a multiple-copy job. With a proof job, the
customer assigns a password and copy account at the client workstation before
printing. The first set of prints are printed immediately. The original number of
requested sets are printed after the customer enters the matching password on the
printer's control panel. The customer has the option of printing the original number
of requested sets or deleting the job. Since more than one job may be associated with
the same password, the customer can print all the jobs, delete all the jobs or select or
delete individual jobs. A proof job that has not been printed is retained on hard disk
through power cycles. Proof jobs sent to a printer without the hard disk option are not
printed and are discarded.
Secure Jobs. Secure printing allows the customer to defer printing of a job until a
matching password is entered from the control panel. The customer assigns the
password at the client workstation before printing. The job is stored, and printing is
delayed until the password is entered on the printer's control panel. Since more than
one job can have the same password, all secure jobs with the same password are
printed. A secure job that has not been printed or released is retained on disk through
power cycles. The internal hard drive is required for this function.
TIFF Direct Printing.
TIFF files consist of compressed binary images. The TIFF format
itself has no capability to select printing options such as orientation, paper size, or
duplexing. All TIFF files downloaded to the printer are processed using the default
PostScript parameters stored in the printer. Auto sensing of TIFF files are included in
the emulation sensing and switching logic when the TIFF option is enabled. TIFF
direct printing requires the internal hard drive.
PDF Direct Printing
. The printer supports a native PDF image processing. Processing
PDF files directly requires a hard disk. PDF printing uses the printer's currently
defined imaging settings. Auto sensing of PDF files are included in the emulation
sensing and switching logic when the PDF option is installed. PDF direct printing
requires the internal hard drive.
Hex Mode. The printer features a hex mode in which all prints are printed as
hexadecimal codes as well as the ASCII equivalent. Hex mode pages are numbered
and formatted to clearly indicate the order in which data was received. Hex mode is
invoked from the control panel's Print Menu, and remains active until it is explicitly
disabled at the control panel or the printer is reset. SNMP data may be processed in
Hex mode, since it is not print data. EtherTalk or TokenTalk is not operational in Hex
mode, since these protocols require the PostScript interpreter to be running.
PostScript and PCL interpreters are not available in Hex mode. When Hex mode is
active, all PDL job streams are printed in hex, rather than interpreted. This includes
TIFF, PDF, and PJL.
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Service Guide