General Information - Oki OKIFAX 5250 Service Manual

Table of Contents
....7.21 Document Jam
....7.22 Printer Unit
........7.22.1 Precautions
........7.22.2 Troubleshooting Flow Charts of Printer Unit
............Overall Troubleshooting Flowchart
............1: Top Cover is Open
............2: Replace Image Drum Message
............3: Engine Controller Error
............4: Fan Motor Rotation Error
............5: Fuser Unit Thermal Error
............6: Paper Jams
............7: No Paper Tray or No Paper
............Action Items (Printer Unit-LCD Message) Table
........7.22.3 Image Problems Table
............Sample Image Problems
............8: Light or Blurred Output
............9: Smeared Background on Output
............10: Blank Output
............11: Vertical Black Stripes on Output
............12: Evenly Spaced Marks on Output
............13: Missing Print on Output
............14: Vertical White Stripes on Output
............15: Poor Fusing
8 Dipswitch Settings

8.1 General Information

A Board Descriptions
A1.1 Unit Configuration and Block Diagram
....Block Diagram
....Block Diagram Abbreviations
A1.2 Function of Each Unit
A2.1 Signal Flow Explanation
....(1) Copy Mode
....Copy Picture Signal
....(2) G3 Send Mode
....G3 Send Pciture Signal
....(3) G3 Receive Mode
....G3 Receive Picture Signal
....(4) 300 bps Send Mode
....300 bps Send Signal
....(5) 300 bps Receive Mode
....300 bps Receive Signal
....(6) Report Printing
....Report Printing Signal
....(7) Memory Transmission
....(8) Memory Reception
A3.1 Main Control Board (E17) Circuit Diagrams
....A3.1.1 E-17 - CPU Circuit Diagram
........Related Signals of CPU Diagram
....A3.1.2 E17 - FLS, MASK and Real Time Clock Circuit
Diagram
........Block Diagram of FLS, MASK and Real Time Clock
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