Process Control and MUSIC
D0CA/D0C9/D0C8/D0CB 7-72 SM
information, the running distance information of Development unit and PCU, and other
information used by image density control.
7.10.2 MUSIC
Color Skew Adjustment Timing
This model has a mechanism that adjusts color skew, which we call MUSIC. The machine
creates a pattern for correction, measures the image position by the pattern, and adjusts the
image position.
No. MUSIC performs when: Notes
1 The power switch is just turned ON, or the machine recovers
from the energy save mode.
Executes [Mode b] (*2) or
[Mode a] (*1)
2 The machine does a print job. Executes [Mode b] (*2)
3 Printing is completed. Executes [Mode b] (*2)
4 The front cover is closed. Executes [Mode b] (*2) or
[Mode a] (*1)
5 The machine is waiting. Executes [Mode b] (*2)
6 The machine detects a new PCDU automatically, ITB
manually.
Executes [Mode a] (*1)
*1 [Mode a] fine adjusts twice.
*2 [Mode b] fine adjusts once.
To operate modes a/b/c manually, use the following SPs:
• SP2-111-001 (Forced Line Position Adj.: [Mode a])
• SP2-111-002 (Forced Line Position Adj.: [Mode b])
• SP2-111-003 (Forced Line Position Adj.: [Mode c]): Do this SP when you have replaced a
laser unit, or when significant color skew occurs.
• Do [Mode a] and [Mode b] after doing [Mode c].
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