Canon S820MG Service Manual page 101

Part 2: Troubleshooting
3.3.2 Removing and installing tap screws
The printer uses tap screws to fasten the printer unit and base. The removed tap
screws will have residue from the mold in which the internal thread was made. Since
the residue may crush the screw threads, clean off the residue from the tap screws
before re-installing or use new tap screws.
3.3.3 Installing and removing the timing slit strip
The timing slit strip is fixed in place and held taut by the torsion spring. When you
install or remove the timing slit strip, you have to stretch the torsion spring. Be
careful not to pull the torsion spring too much in the direction of the arrow or you will
not be able to properly install the timing slit strip the next time.
Therefore, when installing or removing the timing slit strip, take great care not to pull
the torsion spring too much.
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Figure 2-5 Timing Slit Strip
ManualsBooks
S900/ S820/ S750/ S520