HP Designjet T1120 Printer series - Manual (Page 130)

10. Pull the blue handle upward until the printhead is released from the carriage.
CAUTION: Do not pull abruptly because this can damage the printhead.
11. The front-panel display identifies the missing printhead.
Insert a printhead
1. Remove the orange protective caps by pulling them down.
2. The printhead is designed to prevent you from accidentally inserting it into the wrong slot. Check
that the colored label on the printhead matches the colored label of the carriage slot into which the
printhead is to be inserted.
ENWW Insert a printhead 121
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