PCU
SM 3-63 D014/D015/D078/D079
Replacement
Adjustment
Never initialize the TD sensor more than once. Initializing the TD sensor more
than once can cause toner scatter inside the machine.
Initialize the TD sensor only 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.
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.
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