18 White Streaks (drum memory)
[Symptom]
In main scan direction, light white streaks appear at approx. 190mm interval.
Approx. 190mm
Paper feeding direction
[Probable cause]
If the humidity on the drum surface is different at enclosed space of the cleaning section and
other part, the symptom appears by the cycle of drum rotation.
Symptom tends to occurs if the machine is shut-off then restarted after interval or started up
first time in the morning.
[Solution]
1) From service mode or utility menu, perform Auto gamma adjustment several times.
・
Service mode => [02 Process Adjustment] => [02 Drum Peculiarity Adj.] => [03 Auto
gamma adjustment]
・
Utility/Counter => [03 Machine Admin. Setting] => [01 System Setting] => [05 Expert
Adjustment] => [08 Execute Adjust Operation] => [Automatic Gamma Adj.]
2) Change the setting for the photoconductor drum tiny rotation. (Preventive measure)
Service mode: [03 System Setting] =>[01 Software SW Setting]
CAUTION: The life of the photoconductor drum becomes shorter.
DipSW26-7
1: Operates at HH environment only (default)
0: Always operates regardless of the environment
Service mode: [02 Process Adjustment]=>[05 Interval/Quantity Adj.]
=>01 Drum Tiny Rotation Interval =>
0: 3 minutes (default)
1: 2 minutes
2: 1 minute
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