Initial Checks - Minolta Di 620 Manual

5 IMAGE FAILURE
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:
A basic cause or any other cause
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.
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