COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)II. TROUBLESHOOTING IMAGE FAULTSA. Making Initial Checks1. Site Environmenta. The voltage must be as rated (±10%).b. The machine must not be in a high-temperature/-humidity environment (near waterfaucet, water boiler, humidifier), or it must not be in a cold place. There must not be asource of fire nearby, and the machine must not be subjected to excess dust.c. The machine must not be subjected to ammonium gas.d. The machine must not be exposed to direct sunshine. As necessary, curtains must beprovided.e. The room must be well ventilated.f. The machine must be kept level.g. The power plug of the printer unit must be connected to the power outlet. However, ifthe reader unit is installed, the power plug of the printer unit must be connected to thereader unit and the power plug of the reader unit must be connected to the power out-let.2. Checking the OriginalsCheck the problem to find out whether it is caused by the original or the machine.a. Checking the Density of the OriginalA diazo original or an original with a high transparency can produce prints that can bemistakenly thought of as being “foggy.”An original prepared in light pencil can produce prints that can be mistakenly thoughtof as being “too light.”3. Checking the Assembliesa. Check the secondary pre-transfer charging assembly and the separation static elimi-nator for dirt and faults (scratches, deformations).b. Clean the cleaning wires of the secondary pre-transfer charging assembly and theseparation static eliminator. Also, clean the density sensor and the pre-exposure LEDassembly.c. Check to make sure that the following are mounted properly: intermediate transferdrum unit, fixing assembly, ITD cleaning roller, secondary transfer belt assembly,toner cartridge, and drum cartridge.4. Checking the Papera. Is the paper of a type recommended by Canon?b. Is the paper moist? Try paper fresh out of package.CHAPTER 10 TROUBLESHOOTING10-10Download free service manual at http://printer1.blogspot.com
