Hi! Thank you for your reply.
The printer is initializing correctly. In the SDS menu I ran a cyclic carriage test (50 cycles) everything is fine.
I did the test with the carriage encoders too, the numbers change.
I also pulled out the FireWire cable and unwrapped it, didn't help either.
Yesterday I cleared the encoder ribbon and the encoder window and the status light changed to red! But even this did not prevent the printer from initializing and the printer behavior did not change at all!
Judging by the logs, the problem is in the comparison of data from the linear encoder and the carriage motor encoder. But I don't understand what to do about it!?!?
I will send a video of the encoder tests soon.
Thanks for your attention!
Thank you for this good videos! Now it is clear that you have not problems with encoders and with readers.
I do not know why you can not post in FB group. Will check.
Your problem is not something new under the sun. I had same problem in 550 few times on different printers before years.
I can not remember what was the problem in this cases.
And yes ... If in SDS you can cycle the carriage this mean that you have a problem with Fireware. In this test the heads doesn't work.
But if the cable was changed ... it is clear that the problem is not in it.
However, there are two boards at either end of the cable. Carriage Board and Data Relay Board. Both play a very important role in the machine.
The problem may be related to a broken registry file as well.
Make a copy of the registry file for sure ... !
Try to use the old registry from before when the the printer was in normal condition.
Double click on file and test please! You can find registry files in HDD of the printer I hope.
Restart the printer from power supply. Not just software. Power off, 10 sec. Power on.
P.S.
It is not impossible for this problem to be caused by a partially malfunctioning electronic head, but it is extremely rare.
If you have a head in doubt, you can also remove the cable from the print head board for a test. If the registers do not resolve the problem, you may need to turn off the heads one at a time or turn off the power to the print head board.
At least that's what I would do if everything looks fine, but ends up not working as expected.
If the head cables (the white ribbon cables) have never been replaced, do not clean them with alcohol. The blue tape at the end will fall off and this will leave the cable pins completely free like a comb.
I really hope the problem is solved with registries.