Print Image Is Distorted In The Paper Feed Direction (Irregular Feeding) - Sony UP-D898DC Service Manual

2-2-4. Print image is distorted in the paper feed direction (irregular feeding)

Print image is distorted in the
paper feed direction.
Does the stepping motor operate
normally and is the printing paper
normally fed after pressing the
[FEED] button?
No
Does the stepping motor drive
signal of CN904 on the SW-1703
board change normally?
Yes
Is the connection of the harness
attached to the stepping motor
normal?
Yes
Replace the stepping motor.
(Refer to Section 3-10.)
UP-D898DC
Yes
Replace the MA-201 board.
(Refer to Section 3-8.)
Is harness connecting CN1101
No
on the MA-201 board and CN901
on the SW-1703 normal?
Does the stepping motor drive
signal of CN1101 on the MA-201
board change normally?
Replace the SW-1703 board.
(Refer to Section 3-7.)
Connect harness correctly. If the
No symptom persists, replace the
stepping motor.
(Refer to Section 3-10.)
No
Yes
No
Yes
Connect harness correctly. If the
symptom persists, replace
harness. (Refer to Section 5.)
Replace the MA-201 board.
(Refer to Section 3-8.)
2-7 (E)