It's not required to remove the whole carriage, it's possible to replace heads one by one. But it may be tricky, as the electric cables inside the carriage are very thin and you have to be careful (they are in front of the heads partially, especially cables to UV diodes).
The general procedure is as follows:
- remove covers
- backup the parameters
- discharge the ink from the whole path (only the colour with malfunctioning head)
- remove or move parts, which block access to the head
- remove the head itself (together with the subtank, they are connected mechanically
- swap the subtank for the new head
- put the new head inside the carriage (this part may be difficult, sometimes it takes 10-20 minutes, especially for not an experienced person)
- fill the system (channel) with the ink (there's a separate procedure for this)
- setup the new head parameters (voltage, head slant, front-back alignment, SiDir and ReDir calibration)
- verify the printing quality and set the parameters for each printing mode, if required
As you see, it's not an easy task and requires knowledge and some special equipment, i.e. ink flush in pouches, flushing adapters, very long Allen key (without it you won't reach the screw at the rear of the head). Maybe it would be better to call the service?
And how do you know it's the head itself? Do you have any errors (except the missing channel)? Were any diagnostics made?
Thanks for your reply!
This is already a helpful beginning.
I would say except of the points from the backup and setup for the new head i can do that.
Do you think you can explain me how to do the backup and setup?
I have flushing ink, i have flushing adapters and know how to flush and ink fill up procedure works.
It is for now a guess from Fuji after the i explained the way, he lost the color and some checked values.
Either the subtank sensor or a dead printer head is the idea from them.
The parameter wich i checked was in the menu
#PARAMETER-SYSTEM PARAMETERS from 62 to 69
62= -560
63= -1690
64= 0
65= 434
66= 453
67= 373
68= 384
69= 313
They said the 0 from 64 (yellow) is a indication for a dead printer head.
How it happened:
Before the winter i flush always the ink route and heads to bring him in the winter sleep and wake him up in spring.
I did the ink fill up procedure as always at spring tine and a nozzles test print.
All the colors was directly back between 20% and 70%, also yellow with around 30%.
Then i started to clean and got all colors better and better till 100% just yellow was fallen down to 10% douring the cleaning.
Then i decided to flush the Printer head manuell with a injection. For that i disconnected the ink hose from the head and flushed with alcohol.
First was just a couple of holes open and after 2-3 times was all holes free.
After flushing i did the ink fill up procedure for yellow again to get rid of the air.
From there on the nozzles was complete gone.
Did the subtank maintance a couple of times without success.
Maybe the head flushing was not a good idea.
Yeah the service would be for sure the better way, just they ask for the repair 4500.- till 6000.-.
We are a small manufacture for Kiteboards not a print shop and do just our simple low quality prints.
For that price of the repair i need to think about if we not just sell it for spare parts because we can not spend so much for the repair.
Also was thinking about to change the heads.... yellow and light magenda to have at least almost every color back.
As is said, we do just simple grafics, i can live with when i don´t have the full color spectrum.
