Table of Contents
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Section 3: Brief Technical Description ................................................... 3 - 1
Electrophotographic Process Flow .................................................................................................. 3 - 1
3.1
Fundamentals of the Electro-Photographic Process ............................................................ 3 - 2
3.2
Actual Electrophotographic Process .................................................................................... 3 - 5
3.3
Boards and Units ................................................................................................................. 3 - 6
Block Diagram (Figure 3.3.1).............................................................................................. 3 - 7
3.4
Overall Dimension and Mechanical Structure..................................................................... 3 - 8
Section 4: Disassembly ........................................................................... 4 - 1
4.1
General................................................................................................................................. 4 - 1
4.1.1 Precautions for Parts Replacement .......................................................................... 4 - 1
Service Caution ....................................................................................................... 4 - 2
4.1.2 Tools ........................................................................................................................ 4 - 3
4.1.3 How to Disassemble and Reassemble ..................................................................... 4 - 3
Disassembly Procedure Flow Figure 4.1 (1/2) ........................................................ 4 - 4
Disassembly Procedure Flow Figure 4.1 (2/2) ........................................................ 4 - 5
Whole Unit Picture .................................................................................................. 4 - 6
4.1.3.1 LED Print Head ........................................................................................ 4 - 7
4.1.3.2 Image Drum and Covers (Rear, NCU, Main) and NCU Board ................ 4 - 8
4.1.3.3 Unit-048 OPE-Panel ............................................................................... 4 - 10
4.1.3.4 Separation Rubber, Sensor Frame Roller Assembly (U) ........................ 4 - 11
4.1.3.5 Roller Assembly-ADF, CIS, Lever-PC1 and PC2 .................................. 4 - 12
4.1.3.6 Board-R44, OKIOFFICE 44 Power Supply Unit ................................... 4 - 14
4.1.3.7 Option (Board-Memory: MEM, Board-CTR; PC Interface) .................. 4 - 16
4.1.3.8 Printer Unit Section ................................................................................ 4 - 17
4.1.3.9 Transfer Roller ........................................................................................ 4 - 18
4.1.3.10 High-Voltage Power Supply Unit (TLHV/OLHV) ................................ 4 - 19
4.1.3.11 Holder Assembly .................................................................................... 4 - 20
4.1.3.12 Plate-Side M and Gear-Idle .................................................................... 4 - 21
4.1.3.13 Registration Roller .................................................................................. 4 - 22
4.1.3.14 Drive Shaft E (Eject) and Eject Roller ................................................... 4 - 23
4.1.3.15 Heat Assembly ........................................................................................ 4 - 24
4.1.3.16 Pressure Roller B (Back Up Roller) ....................................................... 4 - 25
4.1.3.17 Hopping Shaft Assembly ........................................................................ 4 - 26
4.1.3.18 Paper Sensor E, Paper Sensor Exit and Toner Sensor Assembly ........... 4 - 27
4.1.3.19 Printer Unit ............................................................................................. 4 - 28
Section 5: Adjustments ........................................................................... 5 - 1
5.1
Setting of LED Print Head Drive Time ............................................................................... 5 - 1
Settings of Technical Function No. 27 (Table 5.1.1) ........................................................... 5 - 1
5.2
Confirmation Items .............................................................................................................. 5 - 2
Service Caution ................................................................................................................... 5 - 3
5.3
Measurement ....................................................................................................................... 5 - 4
Service Caution ................................................................................................................... 5 - 5
Table of Contents
TOC - 3
OKIOFFICE 44
Service Manual, P/N 59276801
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Table of Contents
Troubleshooting
