Introduction
The following rules apply throughout this Service Manual:
1. Each chapter contains sections explaining the purpose of specific functions and the relationship between electrical and mechanical systems with refer-
ence to the timing of operation.
In the diagrams,
represents the path of mechanical drive; where a signal name accompanies the symbol , the arrow
indicates the
direction of the electric signal.
The expression "turn on the power" means flipping on the power switch, closing the front door, and closing the delivery unit door, which results in
supplying the machine with power.
2. In the digital circuits, '1'is used to indicate that the voltage level of a given signal is "High", while '0' is used to indicate "Low".(The voltage value, how-
ever, differs from circuit to circuit.) In addition, the asterisk (*) as in "DRMD*" indicates that the DRMD signal goes on when '0'.
In practically all cases, the internal mechanisms of a microprocessor cannot be checked in the field. Therefore, the operations of the microprocessors
used in the machines are not discussed: they are explained in terms of from sensors to the input of the DC controller PCB and from the output of the
DC controller PCB to the loads.
The descriptions in this Service Manual are subject to change without notice for product improvement or other purposes, and major changes will be com-
municated in the form of Service Information bulletins.
All service persons are expected to have a good understanding of the contents of this Service Manual and all relevant Service Information bulletins and be
able to identify and isolate faults in the machine."
Summary of Contents for iR2422 series
Page 1: ...May 12 2014 Service Manual iR2422 2420 2320 2318 Series...
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Page 16: ...Contents...
Page 17: ...Chapter 1 Introduction...
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Page 51: ...Chapter 2 Installation...
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Page 58: ...Chapter 2 2 4 7 Left cover front 15 Right cover upper 8 Manual feed tray 16 Right cover lower...
Page 62: ...Chapter 2 2 8 8 Manual feed tray 16 Right cover lower...
Page 64: ...Chapter 2 2 10 8 Manual feed tray 16 Right cover lower...
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Page 91: ...Chapter 3 Main Controller...
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Page 103: ...Chapter 4 Original Exposure System...
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Page 135: ...9 Remove the reader heater left 1 Connector 2 1 pc Screw 3 1 pc F 4 73 2 3 1...
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Page 137: ...Chapter 5 Laser Exposure...
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Page 149: ...Chapter 6 Image Formation...
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Page 165: ...Chapter 7 Pickup Feeding System...
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Page 193: ...Chapter 8 Fixing System...
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Page 207: ...Chapter 9 External and Controls...
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Page 229: ...Chapter 10 Maintenance and Inspection...
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Page 235: ...Chapter 11 Standards and Adjustments...
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Page 241: ...Chapter 12 Correcting Faulty Images...
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Page 257: ...Chapter 13 Self Diagnosis...
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Page 269: ...Chapter 14 Service Mode...
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Page 287: ...Chapter 15 Upgrading...
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Page 295: ...Chapter 16 Service Tools...
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Page 301: ...Chapter 17 Backup Data...
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