Panasonic DP-C321, Service Handbook

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Chapter 2 Maintenance
ADJ3. 1. 2 DADF Document Detection Correction (DC527: Size Detection
Automatic Correction Function)
Purpose To adjust automatically the document size scanned by DADF to the designated
document size.
Perform this adjustment when the following operation is conducted:
• Replacing of the DADF ASSY.
• When an error is detected after replacing Registration Roller, Feed Roller, and Retard Roller.
• When an error is found on the size detection.
[Overview]
Scan three sheets of document continuously in the DADF. Comparing the Slow Scan length
detected in the DADF with the standard value, correct the NVM data automatically. The NVM
data subject to the correction is "Document Slow Scan size correction value in Non CVT Mode"
(Chain Link No.710-003).
Documents for scanning differ depending on each market as below.
8.5 x 11" LEF (Slow scan length accuracy (215.9 ± 0.7 mm))
Adjustment
Procedure
1. Enter DC527 .
2. Set three documents to be transported in the DADF.
*Document sizes to be transported differ depending on each market.
8.5"x11"LEF (Slow scan length accuracy (215.9 mm ± 0.7 mm))
3. When the [Enter] button is pressed, DADF starts pulling in the document and calculate the
correction value. At this point, the [Entering] message appears.
4. The corresponding NVM data is updated and PSW screen indicates that the process has
been completed
Or, if this process becomes NG, the NVM data is not updated and the message telling that
NG has occurred appears on the screen.
5. Pressing the [Exit] button completes the servicing.
Specification on Result Confirmation
The following result can be checked in the NVM Read after the process completes.
<Restrictions to Note>
• Once this process has started, it cannot be stopped (interrupted) half-way until it completes
irrespective of success or failure.
• This process does not allow the fourth sheet onwards to be pulled in when documents of four
or more sheets are set in the DADF.
Chain-Link Indicated Data Name Remarks
710-003 Document slow scan size
correction value in Non CVT
Mode Setup Range=144~256
(Equivalent to ±56 Step [±10 mm] <- Left
0.18 mm/Step)
Initial value: 200 (But the factory adjustment
value is set as the initial value.)
If the result is NG after the adjustment, perform the process again.