Konica Minolta Bizhub 20p Service Manual page 57

CHAPTER 3 ERROR INDICATION AND TROUBLESHOOTING
This chapter details error messages and codes that the incorporated self-diagnostic
functions display if any error or malfunction occurs. If any error message appears, refer to
this chapter to find which components should be checked or replaced.
The latter half of this chapter provides sample problems that could occur in the main sections
of the machine and related troubleshooting procedures. This will help service personnel
pinpoint and repair defective components.
1. INTRODUCTION ........................................................................................................... 3-1
1.1 Precautions............................................................................................................ 3-1
1.2 Part names ............................................................................................................ 3-2
1.3 Initial Check ........................................................................................................... 3-3
2. DISTINGUISH ERROR CAUSE .................................................................................... 3-5
2.1 LED indication ....................................................................................................... 3-5
2.1.1 LED indication at Operator Calls ................................................................ 3-5
2.1.2 LED indication at Service Calls .................................................................. 3-9
2.2 Error Cause and Remedy.................................................................................... 3-14
3. PAPER FEEDING PROBLEMS .................................................................................. 3-27
3.1 No Feeding .......................................................................................................... 3-27
3.2 Double Feeding ................................................................................................... 3-27
3.3 Paper Jam ........................................................................................................... 3-28
3.4 Dirt on Paper ....................................................................................................... 3-30
3.5 Wrinkles or creases ............................................................................................. 3-30
3.6 Waves in the paper / folds in the paper at the eject roller 2................................. 3-30
3.7 Curl in the paper .................................................................................................. 3-31
3.8 Prints only single side of the paper when duplex-printing ................................... 3-31
4. TROUBLESHOOTING FOR PRINT IMAGE DEFECT................................................ 3-32
4.1 Image Defect Examples ...................................................................................... 3-32
4.2 Diameter of Rollers.............................................................................................. 3-32
4.3 Troubleshooting for Image Defect ....................................................................... 3-33
5. SOFTWARE SETTING PROBLEMS .......................................................................... 3-47
6. NETWORK PROBLEMS............................................................................................. 3-48
CONTENTS
Confidential