PCU (PHOTOCONDUCTOR UNITS) August, 2006
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Important!
ONLY INITIALIZE THE TD SENSOR ONE TIME. DO NOT DO IT MORE THAN ONE TIME.
Only initialize the TD sensor at the following times:
• At installation, exactly as explained in the installation procedure.
• After you replace developer (only initialize the TD sensor for the color that you
replaced)
• As instructed in specific troubleshooting procedures.
• If you d o not obey these instructions, you will get toner scattering inside the
machine.
Here is a summary of the important difference between SP3801 001-006 (Init TD
sensor) and SP3811 001-006 (Dev Setup Exe):
• SP3801 001-006 (Init TD sensor) only initializes the TD sensor.
• SP3811 001-006 (Dev Setup Exe) initializes the TD sensor and sends toner to
the sub hopper of each PCU. This covers the PCU drum with a layer of toner.
Covering the drum with toner prevents the cleaning blades from scratching or
bending the drums. SP3811 is necessary only when both the developer and
cleaning blade are replaced together. For the other procedures, if you send toner
to the PCU, that toner is wasted.