Process Control
D014/D015/D078/D079 6-48 SM
4. MUSIC
The MUSIC adjustments are done only if the process control readings are within the
prescribed ranges.
5. Potential Control (Toner Application Control)
Adjustment is done for residual potential. The laser unit fires at full power to
compensate for a possible high residual potential on the drum. Next, the amount of
residual potential is detected, and the charge is adjusted to achieve the target potential.
The detected Vr must be less than –200V.
Using the values retrieved from the lookup table in Step 3 above, Vd, Vb, and Vpl are
updated to Vd*, Vb*, and Vpl*
1) Vb*: Targeted development Bias after Vr correction
2) Vd*: Target drum potential after Vr correction
3) Vpl*: Target electrical potential after Vr correction
Possible Errors at Vr (Residual Potential) Adjustment
SC Codes For More Details:
SC432~SC435
See "Process Control Troubleshooting" in "4. Troubleshooting" in
the Venus-C1 (B132/B200) Service Manual.
SP3821 62
Possible Errors at Vd (Development Bias) Adjustment
SC Codes For More Details:
SC420~SC423
See "Process Control Troubleshooting" in "4. Troubleshooting" in
the Venus-C1 (B132/B200) Service Manual.
SP3821 63
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