Canon imagePROGRAF GP-300 - Manual (Page 46)

Carriage
(A) Print Head
The print head is equipped with ink nozzles. The carriage serves a key role in printing.
(B) Print Head Locking Cover
Secures the print head.
(C) Angle Adjustment Lever
Fine-tunes the line misalignment when printing.
(D) Print Head Lock Lever
Lock print head locking cover.
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