NBS Technologies Javelin DNA User Manual page 39

1) Replace the TPH
1. Detach the earth cable on TPH as shown in the below pictures.
2. While pressing down the black bar above printhead, push the TPH by
its body upwards and forwards. Taking care not to touch the ceramic
edge of the printhead.
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3. Remove the TPH's connector by
lifting it.
4. Pull it towards you to remove,
and then replace it with a new one.
(Install the TPH in reverse order of
the removal steps.)
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JAVELIN DNA User Guide Manual