This service manual provides basic information required for performing field service to maintain the product quality and functions of the this machine. The structure of the manual is as described below.
Each chapter consists of the following sections.
Chapter 1, Introduction, : Features, specifications, operation methods, copying process.
Chapter 2, Basic operation, : Explanation of the machines basic operations
Chapter 3, Exposure system, : Explanation of the exposure systems mechanical / electrical system operating principles, timing, disassembly, assembly and adjustment methods.
Chapter 4, Image processing system, : Explanation of the CCD, analogue / digital image processing, disassembly, assembly and adjustment methods.
Chapter 5, Laser exposure system, : Explanation of the laser exposure systems mechanical / electrical system operating principles, timing, disassembly, assembly and adjustment methods.
Chapter 6, Image formation system, : Explanation of the image formation systems mechanical / electrical system operating principles, timing, disassembly, assembly and adjustment methods.
Chapter 7, Pick-up / Feed system, : Explanation of the pick-up / feed systems mechanical / electrical system operating principles, timing, disassembly, assembly and adjustment methods.
Chapter 8, Fixing system, : Explanation of the fixing systems mechanical / electri-cal system operating principles, timing, disassembly, assembly and adjustment meth-ods.
Chapter 9, Outer cover / auxiliary control system, : Explanation of the outer cover / auxiliary control systems mechanical / electrical system operating principles, timing, disassembly, assembly and adjustment methods.
Chapter 10, Cassette feeder, : Explanation of the cassette feeders mechanical / electrical system operating principles, timing, disassembly, assembly and adjustment methods.
Chapter 11, Installation, : Conditions relating to the place of installation, and the installation procedures.
Chapter 12, Maintenance and Inspection, : Table of periodic replacement parts and consumables replacement targets, periodic service list and parts to be cleaned during a customer service call.
Chapter 13, Troubleshooting, : Standards / adjustments, operation failure counter-measures and delivery failure countermeasures
Appendix : General timing chart, general circuit diagram, etc..
The explanations in this manual are based on the following principles.
1. Each chapter gives an overview of each function's purpose, role and the connection between the electrical and mechanical systems as well as the operation timing of each part.
In the outline diagram, the signal shows the mechanical drive transmission.
When the signal is shown with a signal name, it indicates the electric signal flow.
In the explanation of this units digital circuit, 1 is indicated when the signal's volt-age level is high, and 0 is indicated when it is low. However, the voltage value will differ depending on the electrical circuit. Furthermore, the * in the signal value [DRMD*] shows the DRMD signal is 0 and ON.
In each chapter, [Power supply ON] indicates the power supply SW has been turned "ON", the front door, etc., has been shut, and power is being supplied to the copier.
2. This unit utilizes micro processors, however, due to the impossibility of checking the micro processor's internal operation, an explanation of the micro processor's opera-tion has been omitted. Furthermore, assuming that internal repair of the print circuit board will not take place on the customer's premises, the explanation of the circuit in
the print circuit board's circuit is limited to an outline explanation using a block dia-gram.
Consequently, the electrical circuit explanations consist of 2 types, from the sensors to the main circuit boards input section, and from the main circuit boards' output section to the load, and block diagrams by function.
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