Minolta Di620, Manual, Page: 293 / 466

T-78
1155SBT0501A
5-1. Image Failure Troubleshooting
•
Image failures have many possible causes. For troubleshooting, it is necessary to determine
whether a failure is attributable to:
➀
A basic cause or any other cause
➁
The input system (IR, memory) or output system (engine, memory).
In this chapter, troubleshooting is divided into “initial checks” and “troubleshooting procedures classi-
fied by image failures.” If any image failure has occurred, first make the initial checks, then proceed
to the corresponding image failure troubleshooting procedure.
1155SBT0502A
5-2. Initial Checks
1) Place of installation
•
Is the source voltage normal? Does the voltage vary greatly?
•
Is the copier installed in a hot, humid place or in a place where temperature varies sharply?
•
Is the copier installed in a dusty place?
•
Is the copier subjected to direct sunlight?
•
Is the copier level?
2) Copy paper
•
Is the recommended paper used?
•
Is the paper damp?
3) Original
•
Is the original written in light pencil?
→
Use the test chart to check the image.
•
Is the original transparent or are transparencies being used?
→
Place a blank sheet of paper on the original and make a copy.
•
Is the Original Glass dirty or scratched?
→
Clean a dirty glass, or replace a scratched one.
4) Adjust data and Level History data
•
Do the values set for “Adjust” and “Level History” fall within the specified ranges?
5) PM parts (supplies)
•
Have the PM parts (supplies), such as the PC Drum, Cleaning Blade, and others that affect
image quality reached the end of the their cleaning/replacement cycles?
6) Adjustment items (registration, focus, etc.)
•
Among the adjustment items given in DIS/REASSEMBLY, ADJUSTMENT, is there any adjust-
ment that may remedy the image failure?
7) Input system (IR, memory) or output system (engine, memory)?
•
Select "F12 Test Pattern" of "Function (Printer)" available from Tech. Rep. and produce a test
pattern output.
→
If the test pattern output has the same problem as the copy image:
→
Check the output system.
•
Turn "ON" the "Criss Cross Mode" function available from User's Choice and make copies from
two or more originals in the Sort mode.
→
If the image on the copy fed out crosswise has the same problem as that on the copy
fed out lengthwise:
→
Check the input system.
→
If the image on the copy fed out crosswise has a problem different from that on the copy
fed out lengthwise:
→
Check the output system.
•
Make a copy at a different zoom ratio.
→
If the enlarged or reduced copy has the same image problem as the problem copy:
→
Check the input system.
→
If the enlarged or reduced copy has a problem different from the problem copy:
→
Check the output system.
5 IMAGE FAILURE