My 44" Z3100 went into service in May 2007. The belt recently started disintegrating leaving debris inside the printer and sometimes on prints. I decided to do the replacement myself with a replacement belt I ordered on-line. I obtained the service manual and found a very good YouTube video on the procedure. The belt is now replaced, but the printer won't pass diagnostics.
The only issues I faced when dis-assembling and re-assembling the printer was the uncapping screw to allow the Carriage Assembly to move away from the service station (service manual pg. 8-97, step 24). I found on dis-assembly, it took a LOT of CCW turns for the Carriage Assembly to become free to move. On re-assembly, I never did get the Carriage Assembly free to move despite a huge number of CW turns. I when ahead with the re-assembly anyway and got the printer to the point of running diags.
In running the 4. Carriage Assembly diagnostics, I got [ERROR 58:11 FAIL DeltaE out of limits 92.000 > 8] and/or [ERROR 58:11 FAIL enabling/disabling ESP]. I removed the ESP, confirmed the shutter is not stuck, cleaned off the silver metal tab on the shutter and re-installed. The ESP part passed but I later got [ERROR 58:11 FAIL DeltaE out of limits 92.000 > 8].
In the Scan Axis Test, Star Wheel Lifter, I get [WARNING: FAIL Star Wheels Lifter length is 3692 EU, outside limits. (3000, 3600)] followed by [ERROR: 87:11 FAIL Scan Axis length: 1066240. Too SHORT. Check path is free. Need mechanical repair.]. I have determined there is nothing blocking the media path and I can load paper right through to the front along the full length.
If I just power up the printer for regular printing, during the initialization and after the carriage has moved all the way to left and then back to the service station, I get [86:01 Possible paper jam].
Since the paper path is definitely not blocked, I am curious as to what I could have done in re-assembling the printer to cause errors in THREE areas (ESP/DeltaE, Star Wheel Lifter and Scan Axis length). Are these all related in some way?
I would be eternally grateful for any advice on additional things I can try before I call in the paid techs.