Canon FY8-23AV-000 manual Others

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CHAPTER 3 IMAGE TROUBLESHOOTING

9.Others

In winter, moving a machine from a cold storage room to a warm site can cause

condensation inside the machine, leading to various problems.

a.Condensation on the scanning system (glass, lens array, reflecting plate) causes dark images.

b.When too cold, the photosensitive drum assumes a high electrical resistance, resulting in poor contrast.

c.Condensation in the pick-up/feeding assembly can cause faulty paper transport.

d.Condensation in the lower roller of the manual pick-up mechanism decreases friction, leading to pick-up failure.

e.Condensation on the copyboard hinders its smooth movement.

When condensation is noted, dry wipe the parts.

The same holds true of the cartridge. After having moved the cartridge from a cold to warm room, leave it alone for about one to two hours before unpacking it.

3-4

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Contents Service Handbook Copyright 1998 Canon INC Contents Troubleshooting Malfunctions Self Diagnosis Page Durables Periodically Replaced PartsPeriodical Servicing Storing Sealed Cartridges 1D Temperature/Humidity Specifications2D 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 Site Environment Making Initial Checks Checking 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 is foggy cross feed direction Copy has a blurred imageCopy 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 moveAt time of jam Paper feeding normallyFixing heater fails to operate Copy Paper Jams Pick-Up Assembly Separation/Feeding AssemblyFixing/Delivery Assembly Double Feeding Feeding FaultsWrinkles 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