Brother International HS-5300 Service Manual - Page 42

2.4 Head Cleaning 2.4.1 Functions of the Maintenance Unit The maintenance unit driven by the PA motor performs maintenance of the head unit to always produce high quality output. (1) Purging Purging starts at power on or when the purge is chosen from the control panel. This eliminates air bubbles and foreign objects in the ink remaining in the ink passage of the head unit by applying pressure to the ink tank. (2) Wiping Wiping is carried out when 50 sheets are printed in order to remove paper dust and ink dust sticking on the nozzles of the head unit using special paper. 2.4.2 Structure of the Maintenance Unit (1) Maintenance unit frame The maintenance frame supports the mechanisms (2)-(7) below and secures them to the frame. (2) Maintenance cartridge The maintenance cartridge is a consumable part and composed of the following parts (a)-(d). (a) Special roll paper The center of the roll paper has a paper tubeless structure and the paper tube that engages with the winding core is taped at its periphery by adhesive tape. (b) Press contacting plate This plate with the special heat resistant flexible sheet makes even contact between the special roll sheet and the nozzle surface of the head unit. The press contacting plate is moved perpendicularly towards the nozzle surface by the press contacting mechanism on the maintenance frame unit. (c) Winding core The winding core is driven by the drive gear train installed on the maintenance unit frame to wind the special roll paper sheet during purging and wiping. (d) Paper transport roller and nip roller The paper transport roller and nip roller are placed at the down stream side of the press contacting plate so that they hold the special roll paper sheet. When the maintenance cartridge is installed on the maintenance frame unit, the nip force is applied to drive the paper transport roller and nip roller together. 11-23