Canon PIXMA MP500 Service Manual page 29

(5) Machine unit and bottom case unit assembly
In assembling the machine unit chassis into the bottom case unit, be cautious of the following points to protect the
waste ink tube from being pinched:
Platen unit (QM2-2202), purge unit (QM2-2208), waste ink tube (QC1-6548), waste ink tube holder (QC1-6460):
(I) At replacement, fix the waste ink tube to the machine chassis and waste ink tube holder with tape (at 2
locations).
If the tube is pinched and blocked, proper purging is prevented, resulting in ink leakage or strange noise.
(No specific tape is specified. In the sample photo below, (1) is the orange tape, and (2) is a clear adhesive
tape, such as Sellotape or Scotch tape.)
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