Troubleshooting; Image Formation Problems - Kyocera KM-4230 Service Manual

2A3/4
3-2 Maintenance Mode
3-2-1 Maintenance mode ........................................................................ 3-2-1
3-2-2 Copier management .................................................................... 3-2-99
3-3 Assembly and Disassembly
3-3-1 Precautions for assembly and disassembly .................................. 3-3-1
3-3-2 Paper feed section ........................................................................ 3-3-3
3-3-3 Optical section ............................................................................. 3-3-23
3-3-4 Main charging section ................................................................. 3-3-42
3-3-5 Drum section ............................................................................... 3-3-45
3-3-6 Developing section ...................................................................... 3-3-51
3-3-7 Transfer and separation section .................................................. 3-3-56
3-3-8 Cleaning section .......................................................................... 3-3-59
3-3-9 Fixing section .............................................................................. 3-3-64
3-3-10 Feedshift and duplex section ...................................................... 3-3-80
3-3-11 SRDF section .............................................................................. 3-3-89
3-3-12 Large paper deck section
(42 ppm: optional/52 ppm: standard) ........................................ 3-3-102
3-4 PCB Initial Settings
3-4-1 Replacing the main PCB ............................................................... 3-4-1
3-4-2 Replacing the main PCB ROMs .................................................... 3-4-2
3-4-3 Adjustment-free variable resisters (VR) ........................................ 3-4-3
3-5 Self-Diagnosis
3-5-1 Self-diagnosis ................................................................................ 3-5-1

3-6 Troubleshooting

3-6-1 Image formation problems ............................................................ 3-6-1

3-6-2 Paper misfeeds ........................................................................... 3-6-18
3-6-3 PCB terminal voltages ................................................................. 3-6-33
3-6-4 Electrical problems ...................................................................... 3-6-73
3-6-5 Mechanical problems .................................................................. 3-6-97
3-7 Appendixes
Timing chart No. 1 .................................................................................... 3-7-1
Timing chart No. 2 .................................................................................... 3-7-2
Timing chart No. 3 .................................................................................... 3-7-3
Timing chart No. 4 .................................................................................... 3-7-4
Timing chart No. 5 .................................................................................... 3-7-5
Timing chart No. 6 .................................................................................... 3-7-6
Timing chart No. 7 .................................................................................... 3-7-7
Timing chart No. 8 .................................................................................... 3-7-8
Timing chart No. 9 .................................................................................... 3-7-9
Timing chart No. 10 ................................................................................ 3-7-10
Timing chart No. 11 ................................................................................ 3-7-11
Timing chart No. 12 ................................................................................ 3-7-12
Power source PCB 1/2 ........................................................................... 3-7-13
Power source PCB 2/2 ........................................................................... 3-7-14
Engine PCB 1/2 ...................................................................................... 3-7-15
Engine PCB 2/2 ...................................................................................... 3-7-16
Main PCB 1/9 .......................................................................................... 3-7-17
Main PCB 2/9 .......................................................................................... 3-7-18
Main PCB 3/9 .......................................................................................... 3-7-19
Main PCB 4/9 .......................................................................................... 3-7-20
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