Canon Color iR C3480 Service Manual page 254

Service Modes:
The per sheet average image duty standard value alpha can be changed in the following service mode.
COPIER > OPTION > BODY > DEVL - VTH
Setting range: 1% to 4%
MEMO:
Normally (when ATR control is performed between sheets, etc.), the colour band sequence is performed right after ATR control. However, when ATR is performed
when post rotation is being performed, the sequences are carried out in the order ATR control to ARCDAT control to colour band sequence.
3. Control flow
Toner band (Y, M, C, K)
Toner band width
(band applied across t [ms])
On ITB
F-7-35
Start
Image duty average value since
last ATR control is below
standard value
Yes
Compute toner band width
Form colour band width after ATR control
Add video counter equivalent to toner used
to form toner band to refill counter
Cumulative image duty reset
End
F-7-36
A4 width
No
APerform ATR control
Chapter 7
7-31