Canon NP1550 Service Manual

Also see for NP1550: Service manual

I MECHANICAL SYSTEM I11) Push the pressure spring of the lower fix-ing roller using a screwdriver, and detachthe upper fixing roller.© Screwdriver (D Lower rollerFigure 4-901 2) Detach the lower fixing roller.4. Attaching the Heater and UpperFixing RollerAttach the heater and the upper fixingroller as in detaching them but in reverseorder while noting the following:a. Heateri. Do not touch the surface of the heater,ii. Make sure that the end bearing the man-ufacturer's name is to the front.b. Upper Fixing Rolleri. Wrap the roller with copy paper to pre-vent soiling or scarring the surface ofthe roller.ii. Make sure that the end with two C-ringsis to the rear.iii. Make sure that the two identical gearsare used at the front.5. Adjusting the Nip Width (tighteningthe pressure adjusting nut)If the nip width is not as shown in Figure4-91 , turn the bolt to adjust it.FeeddirectioncA3 size-b Center ofcopyFigure 4-91Note:the each end.Dimension Measure after the upper and lowerrollers have heated up.b 4.0±0.5mm|a-c| 0.5mm or lessTable 4-1a. Measuring the Nip WidthIf the roller is not heated, wait for 15 min-utes after the WAIT indicator has changedto green; then, make 20 copies before tak-ing measurements.b. Taking Measurements1 Lift the copyboard cover, and make an A3copy of a solid black document..2) Switch the copier OFF as soon as theleading edge of the copy comes out of thecopier, and open the front door and thedelivery assembly.COPYRIGHT© 1992 CANON INC. CANON NP-1550REV.1 SEPT.1992 PRINTED IN JAPAN (IMPRIHEAUJAPON) 4-29