HP Designjet T Series — Service Manual 6-153
Removal and Installation - Line Sensor (T1100/T1100ps/T610)
 
9. Remove the four T-15 screws  that secure 
the Ink Supply Tubes to the Carriage 
Assembly.
10. Carefully lift out the Ink Supply Tubes and 
close the carriage cover at the same time.
11. Close and lock the Carriage Cover.