Tektronix Phaser 340 Service Manual page 203

6. Precisely mark the end of the drum shaft relative to the drum home
flag on the drum position sensor assembly as shown in the illustration;
use a straight edge to ensure accuracy; this is not necessary if you are
also replacing the drum (as part of the drum/transfix assembly).
Drum home
flag
Drum position
encoder wheel
Figure 8-14 Marking the drum-to-drum home flag sensor alignment
7. With a small, flat-blade screwdriver, slide the retaining spring out of
the encoder wheel's groove toward the encoder disk; this removes the
tension securing the encoder wheel to the drum shaft.
Field Replaceable Unit Disassembly/Assembly
Mark on the drum shaft to
align with the home flag
Service Manual
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9100-81
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