Ricoh A250 Service Manual page 776

4.2.17 ID SENSOR ERROR ANALYSIS (SP2-221) ................................4-80
4.3 USER TOOLS .........................................................................................4-81
4.3.1 HOW TO ENTER AND EXIT USER TOOLS ..................................4-81
4.3.2 USER TOOLS TABLE ....................................................................4-81
System Setting Table..........................................................................4-81
Copy Setting Table .............................................................................4-82
4.4 LEDS .......................................................................................................4-83
BICU ...................................................................................................4-83
IOB......................................................................................................4-83
4.5 SPECIAL TOOLS AND LUBRICANTS ....................................................4-83
4.5.1 SPECIAL TOOLS ...........................................................................4-83
4.5.2 LUBRICANTS .................................................................................4-83
4.6 FIRMWARE MODIFICATION HISTORY .................................................4-84
4.6.1 BICU FIRMWARE MODIFICATION HISTORY...............................4-84
4.6.2 ROM HISTORY – BICU (FOR CAPTURE BOX TYPE 270) ...........4-86
PREVENTIVE MAINTENANCE
5. PREVENTIVE MAINTENANCE SCHEDULE ............................... 5-1
5.1 PM TABLE.................................................................................................5-1
REPLACEMENT AND ADJUSTMENT
6. REPLACEMENT AND ADJUSTMENT........................................ 6-1
6.1 SCANNER UNIT........................................................................................6-1
6.1.1 EXPOSURE GLASS.........................................................................6-1
6.1.2 SCANNER EXTERIOR/OPERATION PANEL ..................................6-2
6.1.3 LENS BLOCK ASSEMBLY...............................................................6-3
6.1.4 ORIGINAL SIZE SENSORS/LAMP STABILIZER.............................6-4
6.1.5 EXPOSURE LAMP ...........................................................................6-5
6.1.6 SCANNER MOTOR..........................................................................6-6
6.1.7 SCANNER WIRES ...........................................................................6-7
6.2 LASER UNIT ...........................................................................................6-10
6.2.1 CAUTION DECAL LOCATIONS .....................................................6-10
6.2.2 LASER UNIT ..................................................................................6-11
6.2.3 POLYGON MIRROR MOTOR ........................................................6-12
6.2.4 LD UNIT..........................................................................................6-12
6.2.5 LASER SYNCHRONIZATION DETECTOR....................................6-13
6.3 PHOTOCONDUCTOR UNIT (PCU) ........................................................6-14
6.3.1 PCU ................................................................................................6-14
6.4 TRANSFER UNIT....................................................................................6-15
6.4.1 TRANSFER ROLLER UNIT............................................................6-15
6.4.2 IMAGE DENSITY SENSOR ...........................................................6-16
6.5 FUSING/EXIT ..........................................................................................6-17
6.5.1 FUSING UNIT.................................................................................6-17
6.5.2 THERMISTOR................................................................................6-17
6.5.3 THERMOFUSE ..............................................................................6-18
A265/A267 vi
Rev. 02/2001
SM