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The technician verified the meniscus vacuum with the external gauge? Anyway - if you have ink in the meniscus vacuum filter only in one channel, seems that you have a problem in that specific channel, between the ink manifold (meniscus vacuum is separated into channels there) and the printheads...

Have you seen samples printed on Inca Onset?

Unless you have a UV printer with a glossy finish.

I'm not an Agfa specialist but check the connection between the LCD display/keyboard and the electronic board. It may be a damaged cable, board or display/keyboard.

It may be difficult to find a printer that prints metallic silver, as the nozzles in the printheads are very small and metallic pigment could block them. Clear (varnish) could give the gloss finish (also selective), which is not the same, but it's available in many printers.

In theory (when the printer works properly) during the initialization printer should raise the carriage to the maximum, level it (on the basis of both encoders readings) and then lower toe carriage to the home position. If your printer makes an error during the initialization, that may suggest...

Check the ink pouch inlet, I saw situations, when the old inlet was sucking the air around the ink connector. Check also the recirculation valve, maybe it is not closing completely. Of course, check all the fast connectors along with the white ink tubing (between ink port and ink manifold).

Is it always the same colour channels or different channels?

What do you mean 'die'? Blocked nozzles? Damaged electronically? Do you use original inks?

And the same problem happened in two separate channels? There are two pumps, two recirculation valves, two reservoirs and two ink level sensors. If both channels are empty (according to the firmware), I would say that reading is wrong, otherwise, two separate parts would have to be broken...

And the same problem is in two separate channels? At the same time? I don't believe that.

PBA is an abbreviation for the Printed Circuit Board Assembled, Oce/Canon uses this in their manuals. So PBA is an electronic board. You could try another test - connect the ink pouch with another colour to one of the W channels. The firmware should recognize the colour and give you the warning...

Yes. They have different parameters.

It may be the faulty RFID PBA, lack of power there, any of the cables connecting the RFID PBA with the ink control PBA or the ink control PBA itself (located in the ink box, under the table vacuum valves, it has three yellow air tubes - meniscus, purge, degas - connected to the pressure...

Try to search for the 'digital label press' or 'digital label printer'. It won't be cheap, but for example, Mark Andy has such machines, also Fujifilm, Sakata INX, Xeikon, Bobst.

QE256/30 is the correct head if you replace W or CL head (they shot 30 pl drops). All other heads shot 10 pl drops, so you need QE256/10. And don't forget, that when you just lose the head screws, you may need head calibrations to return to the proper printing quality.

Each printhead has specified voltage and change of the ink type won't change it, but... Except for the base voltage (which is different for each printhead and is specified on the package/label, i.e. 24.31 V) each printhead has a correction voltage, which changes the position of the drops shot by...

Nope, I'm based in Europe, so I guess it would be cheaper to search for a technician in the US :) . Try to call Fujifilm, their Acuity flatbeds are exactly the same printers as Arizonas, so they should know how to deal with your printer. The only problem with them may be the SDS key (service...

Seems that your printer requires complete installation including levelling and carriage angle adjustment. It's very important to keep the carriage levelled during the manual raising/lowering, otherwise, it becomes tilted, firmware detects a difference between values read from both motor encoders...

If you use substrates, which requires higher power of the antistatic bar, it may be required to lower the position of the bar. Original Oce bar (round) is also weak, Fujifilm was using a stronger antistatic bar, supplied by Frasier. It has a longer working distance than the round one from Oce.