Canon FY8-23AV-000 manual Standards and Adjustments

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CHAPTER 2 STANDARDS AND ADJUSTMENTS

9)Place about five sheets of blank copy paper.

10)Turn VR603 (AE gain adjustment) until the voltage between the anode side of the diode (D606; it) and JP607 (GND) is 1.8 ±0.1 V; see Figure 2-5B.

11)Switch the copier OFF.

Notes:

Make sure that the jumping wires are no longer shorted.

12)Switch the copier ON once again.

13)Set the density correction switch (SW606) to the center (of the three settings).

14)Make sure that the AE indicator is ON.

15)Set the newspaper used in step 4) on the copyboard once again; this time, move the newspaper to a different area.

16)Make a copy, and make sure that it is not foggy and has adequate text density.

• If foggy,

Turn VR602 clockwise slightly.

• If text density is low,

Turn VR602 counterclockwise slightly.

17) Repeat steps 15) and 16) until the density is optimum.

2-6

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Contents Service Handbook Copyright 1998 Canon INC Contents Troubleshooting Malfunctions Self Diagnosis Page Periodically Replaced Parts DurablesPeriodical Servicing 1D Temperature/Humidity Specifications Storing Sealed Cartridges2D Transportation Storing and Handling Unsealed Cartridges Reference Image Adjustment Basic Procedure Pre-ChecksPoints to Note Mechanical GlassAdjusting the Intensity VR604 Electrical2B PC400/FC200 Adjusting the AE Mechanism VR602, VR603 JP607 JP605 JP604 Control panel PCB Screwdriver Standards and Adjustments Making Initial Checks Site EnvironmentChecking the Documents Checking the Transfer Charging Roller Checking the Feeding AssemblyChecking the Lens Array for Dirt Checking the Copy PaperImage Troubleshooting Others Image Troubleshooting Samples of Image Faults Troubleshooting by Image Fault YESCopy is foggy overall Back Replace the cartridge Is the problem corrected? Copy has white spots cross feed direction Back of the copy is soiledCopy has faulty fixing Copy has a blurred image Copy is foggy cross feed directionCopy has poor sharpness focus Copy is blank Copy is solid blackImage Troubleshooting Troubleshooting Malfunctions Self diagnosis PC400/FC200Copyboard Does the copying operation start AC power is absent Pick-up fails Scanning lamp fails to go onMain motor fails to rotate Copyboard fails to movePaper feeding normally At time of jamFixing heater fails to operate Copy Paper Jams Pick-Up Assembly Separation/Feeding AssemblyFixing/Delivery Assembly Feeding Faults Double FeedingWrinkles Arrangement and Functions of Electrical Parts Sensors and SolenoidsSwitches Lamp, Heater, Motor, and Others Printed Circuit Board PCB Variable Resistors VR and Check Pins by PCB DC Controller/DC Power Supply PCBControl Panel PCB PC400/FC200Self Diagnosis Self Diagnosis General Timing Chart PC420/430/FC220 General Timing Chart A4, 2 copies Signals/Abbreviations List SignalsAbbreviations General Circuit Diagram PC420/430/FC220 General Circuit Diagram Special Tools Table Solvents/Oils Table Specifications LTR/A4 LGLNVD Prepared by This publication is printed on 70% reprocessed paper

FY8-23AV-000 specifications

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