Xerox DocuColor 12/DCCS50, Service Manual

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4-221 DocuColor 12/DCCS50
ADJ 12.4.1
Repairs and Adjustments
Reissue
ADJ 12.4.1 DADF Lead Edge Registration
Parts List on PL 12.4
Purpose
To ensure that the document is set into the correct position on the Platen (document feed direc-
tion).
NOTE: Before running this function, the lead edge registration in platen mode must be
adjusted ( ADJ 9.1.14 ).
Check
Check (Simplex mode)
1. Place the test pattern (82E8220) on the Platen so that there is no gap between the test
pattern and the Top Registration Gate.
2. Copy the test pattern in the following copy mode:
a.
Copy mode: Black
b. Paper tray: 11” x 17” or A3
c. Magnification: 100
d. Number of copies: 2
3. Measure the distance between the paper top edge and the target line of the second docu-
ment and check if the distance is 10mm
± 0.6mm. If the distance is not within this range,
perform IIT Lead Edge Registration ( ADJ 9.1.14 ), then return to this procedure.
4. Place the copies made in Step 2 into the DADF. Place the second page at the bottom.
Make sure the bottom edge (trail edge) is fed first.
5. Measure the distance from the top of the paper to the target line of the copies made in
Step 2 and Step 4. the difference between the two dimensions must be
± 1.5mm or less.
Adjustment
Adjustment steps (Simplex mode)
1. Enter dC131 NVM Read/Write [710-004] (DADF Lead Registration Time Simplex).
2. If the value obtained in the check steps is:
a.
10.6mm or more, decrease the NVM value;
b. 9.4mm or less, increase the NVM value.
(each NVM step=0.3mm)
c. Repeat Step 2 until the value is within the range (10mm ± 0.6mm).
Check
Check (Duplex mode)
1. Place the test pattern (82E8220) on the platen and make an A4S duplex copy.
2. Place the copy made in Step 1 in the DADF and make a copy in the following mode:
Copy mode: Black
Paper tray: 8.5” x 11” or A4S
Magnification: 100
Number of copies: 1
Mode: duplex-single
3. Check that the distance between the paper top and the target line in the second copy is
10mm
± 0.6mm. If the distance is not within this range, do the following to adjust the reg-
istration ( Figure 1 ).
Figure 1 Checking the Top Registration
Adjustment
Adjustment steps (Duplex mode)
NOTE: Depending on the paper size, the NVM adjustment differs.
a. DC131 [10-007] (Lead Registration Time Duplex 8.5x11LEF): Default 59): B5LEF, A5LEF,
8.5 x 11LEF
b. DC131 [710-008] (Lead Registration Time Duplex A4SEF): Default 60): B5SEF, A5SEF,
8.5 x 11SEF
c. DC131 [710-009] (Lead Registration Time Duplex 8.5x13LEF): Default 61): 8.5 x 14SEF,
B4, A3
1. Check the paper size, enter dC131 NVM Read/Write and select the DC131 Chain Code
from above 9each NVM step=0.3mm).
2. Change the NVM value as shown below and adjust the registration to be within the
allowed range (10mm
±
0.6mm).
If the distance between the paper top and the target line measured in the check steps is:
a.
10.6mm or more, decrease the NVM value;
b. 9.4mm or less, increase the NVM value.
(1 Step=0.3mm)
10.0 +/- 0.6
mm
PAPER
FEED
DIRECTION