I have a designjet t520. It is showing printhead startup failure and it's now the third set of new p

[Mbire]

I have a designjet t520. It is showing printhead startup failure and it's now the third set of new printhead and cartridges but it still display the same error. How can this printer problem be best solved?

[AlS77]

That is typically related to a failure to pressurize or prime the ink system. It can be caused by a leak in the ink system or component failure like the Prime Pump. Check your ink tubes, connections and carriage operation thoroughly.  These are notes from the manual:

Any leakage in the primer system will generate poor or no priming, this will affect nozzle heath (or even
cause the printhead startup to fail). Bear in mind that the system is not just for the Prime Pump and tubes,
the prime pressure is transmitted via the off-axis coupling to the Carriage and from there to the printhead
assembly and from there to the cartridges.

NOTE: There is no pressure sensor in the system. The Prime Pump operates at a certain time to reach a
specific pressure level, the system is depressurized by releasing the pinching of the release tube in the
Service Station (by moving the service station).

NOTE: It is important to ensure the Carriage reaches the maximum left position; if not, the off-axis coupling
will not connect the Prime Pump with the Carriage. Also, the coupling is made of a rubbery material,
degradation of the material will affect Primer performance due to air leaks.