SHARP SP1590 Technical Report

Date: Jun. 7, 1993

COPIER : SF-9400

No. : SP-1590

AMELIORATING WEAR IN THE REAR FRAME GEARWHEELS
AND THE FUSER HEAT ROLLER GEARWHEEL.

1.General: To forestall wear in the fuser gearwheel 35T (P/G 7 -33), fuser idle gearwheel 26T
( 7 -6), and the heat roller gearwheel ( 13 -41) that engages with the upper cleaning
roller gearwheel 18T ( 13 -22), change is met for their material.

2.Cause: Stress added on the gearwheel may gradually wear out. In the worst case, the
gearwheel might be damaged.

3.Description: Wear will be avoided by changing their materials.
° Fuser gearwheel 36T

Parts code NGERH0476FCZZ NGERH0476FCZ1
Material ROM M90 ROM SW-01
Color White Cream

° Fuser idle gearwheel 26T

Parts code NGERH0780FCZZ NGERH0780FCZ1
Material ROM M90 ROM SW-01
Color White Cream

° Upper cleaning roller gearwheel 18T

Parts code NGERH0298FCZZ NGERH0953FCZZ
Material Sintered alloy PAI (Polyamidimid)

* The parts code for the upper cleaning roller is revised after the change in the upper

cleaning roller gearhweel 18T.

CROLN0856FC32 CROLN0856FC33

Change is met for the upper cleaning roller 18T that comes with the maintenance kit.

SHARP CORPORATION Reprography Division

1/3

Green

BB

Fuser gearwheel 35T: Changed

Fuser idle gearwheel 26T: Changed

Upper cleaning roller gearwheel: Changed

This gearwheel engaged with
the upper cleaning roller
gearwheel may come worn out.

Upper cleaning roller: Changed

2/3

(Factory action)

Since January 1993.
Since February 1993 for the maintenance kits SF-940KA and SF-940CR2.