Ricoh Aficio MP2550B Service Manual page 16

PREVENTIVE MAINTENANCE
2. PREVENTIVE MAINTENANCE.................................................... 2-1
2.1 PM TABLE..................................................................................................2-1
2.2 MAIN MOTOR DRIVE GEAR .....................................................................2-7
REPLACEMENT AND ADJUSTMENT
3. REPLACEMENT AND ADJUSTMENT ........................................ 3-1
3.1 SPECIAL TOOLS AND LUBRICANTS .......................................................3-1
3.1.1 SPECIAL TOOLS ..............................................................................3-1
3.1.2 LUBRICANTS....................................................................................3-1
3.2 GENERAL CAUTIONS ...............................................................................3-2
3.2.1 PCU (PHOTOCONDUCTOR UNIT) ..................................................3-2
3.2.2 TRANSFER ROLLER UNIT...............................................................3-2
3.2.3 SCANNER UNIT................................................................................3-2
3.2.4 LASER UNIT .....................................................................................3-3
3.2.5 FUSING UNIT....................................................................................3-3
3.2.6 PAPER FEED....................................................................................3-3
3.2.7 OTHERS............................................................................................3-3
3.3 SCANNER UNIT.........................................................................................3-4
3.3.1 EXPOSURE GLASS..........................................................................3-4
3.3.2 ORIGINAL LENGTH/WIDTH SENSORS...........................................3-4
3.3.3 EXPOSURE LAMP............................................................................3-5
Reassembling .......................................................................................3-7
3.3.4 SCANNER MOTOR...........................................................................3-8
3.3.5 SENSOR BOARD UNIT (SBU)..........................................................3-8
Monochrome Scanner Unit ...................................................................3-8
Color Scanner Unit................................................................................3-9
When reassembling ............................................................................3-10
3.3.6 EXPOSURE LAMP STABILIZER ....................................................3-10
3.3.7 FRONT SCANNER WIRE ...............................................................3-11
Reinstalling the Front Scanner Wire ...................................................3-11
3.3.8 REAR SCANNER WIRE..................................................................3-14
Reinstalling the Rear Scanner Wire ....................................................3-14
3.3.9 TOUCH PANEL POSITION ADJUSTMENT ....................................3-15
D017/D018/D019/D020 iv SM