Cause
The symptom occurred because of the defect of any of the below locations.
A) When foreign objects are mixed in or having poor contact between the H.V. contact point torsion spring[1]
of ETB and the contact plate[2] of the Fixing/Feed unit.
B) Poor contact of the connector[1] of the Transfer H.V. PCB, poor contact of the intermediate connector[2],
the loosened screw[3] which fixes the Transfer H.V. wire harness, or the defective Transfer H.V. PCB[4].
pg. 278