EPSON Stylus Pro 4400/4450/4800/4880/4880C Revision C
Adjustment Basic Adjustment 413
5.3.21  Rear Sensor Adjustment
When the rear sensor has been replaced, the AD value for setting a paper 
detection standard must be acquired and stored in the Main Board.
 Required Tool
 Microtrace #300 (A4)
 Procedure
1. Enter Maintenance Mode 2.
Power off → Press "Paper Source (<)" + "Paper Feed (Δ)" + "Paper 
Feed (∇)" → Power on
2. Select "SELF TESTING" and enter the Self Testing menu.
"Menu (>)"
3. Select "SELF TESTING: Adjustment".
"Paper Feed (-)" x 1 → "Menu (>)"
4. Find "Adj: Rear AD".
"Paper Feed (-)" x 2
5. Raise "Paper Lever".
6. Insert Microtrace from rear paper feed slot and set it in the position 
shown by Figure 5-59, and then lower the "Paper Lever".
7. Press "Menu (>)"  2 times and the panel display will change as shown 
below.
"[Enter] Start" → "Exc."
8. Start acquisition of AD value by pressing "Menu (>)".
"RearAD: *** *** ***" will be shown in the display approximately 15 
seconds later.
9. "Confirm that "RearAD: *** *** ***" is displayed, raise the [Paper Lever] 
and take out the Microtrace.
10. Lower the "Paper Lever" and turn off the printer power.
Figure 5-59. Setting the Microtrace
C A U T I O N
If "Retry AD Adjust" is displayed in the panel at this time, the 
sensor has failed. Replace the sensor with a new part and 
execute the adjustment again.
Microtrace