CHAPTER 11 TROUBLESHOOTING11-62III. IMAGE FAULTSA. Initial Checks1. Checking the Site EnvironmentMake sure of the following:a. The voltage of the power source is the rating ±10%. (The power plug must not bedisconnected at night.)b. The machine is not near areas of high temperature/humidity (near water faucets,water boilers, humidifiers, and sources of fire), and it is not in a cold or dusty place.c. The machine is not in a place exposed to ammonium gas.d. The machine is not exposed to direct rays of the sun. (Otherwise, provide curtains.)e. The room is well ventilated.f. The machine is kept level.2. Checking the OriginalsCheck the originals to find out whether the problem is caused by the type of originalor the machine.a. The copy density is best set to scale 5 ±1.b. Originals with a reddish background may not provide good contrast (red sheets, slips,etc.).c. The density of originals at times affect the copy quality:Reference:• If the original is a diazo copy or has an appreciable transparency, copies can bemistaken for “foggy” copies.• If the original is made in light pencil, the copies can be mistaken for “light” copies.COPYRIGHT © 1997 CANON INC. CANON NP6560/NP6360/NP6260 REV. 0 NOV. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
