Start with cleaning the linear encoder reader and strip.wire slips, print only machine
Read error of Linear Encoder
Read error of Encoder on Scan Motor side
Wire is not attached properly to Head Carriage,
1) Confirm whether Encoder Scale is between the slit of Encoder5) Bad scan motor
2) Clean Linear Encoder strip and sensor.
3) Confirm Connection between drive wire and head carriage.Print only
4) Confirm Cable Connection between Linear Encoder Board and Print