Ricoh D124 Detailed Descriptions Manual page 5

4.2.6 ROLL END .......................................................................................... 74
4.3 MAIN UNIT PAPER FEED ........................................................................... 75
4.3.1 REGISTRATION ROLLER, EXIT ROLLER ........................................ 75
4.3.2 VERTICAL FEED MECHANISM ......................................................... 76
4.4 REMAINING PAPER DETECTION .............................................................. 78
5-Step Operation Panel Display ............................................................. 80
4.5 PAPER TRANSPORT FAN.......................................................................... 81
4.5.1 GENERAL OPERATION ..................................................................... 81
4.5.2 TRANSPORT FAN DUTY ADJUSTMENT .......................................... 82
4.5.3 NORMAL PAPER, RECYCLED PAPER ............................................. 84
4.5.4 TRANSLUCENT PAPER .................................................................... 84
4.6 DETAILED DESCRIPTION OF PAPER FEED SEQUENCE ....................... 86
4.6.1 PAPER FEED LAYOUT ...................................................................... 86
4.6.2 OPERATION SEQUENCE WHEN THE FIRST ROLL IS SET ............ 87
4.6.3 PAPER SKEW CORRECTION ........................................................... 88
4.6.4 OPERATION SEQUENCE WHEN THE SECOND ROLL IS SET ....... 91
4.7 CUTTING ..................................................................................................... 92
4.8 BYPASS FEED ............................................................................................ 93
5. INK SUPPLY ................................................................................... 95
5.1 OVERVIEW .................................................................................................. 95
5.2 INK CARTRIDGE ......................................................................................... 97
5.3 INK SUPPLY MECHANISM ......................................................................... 99
5.4 CONTROLLING INK SUPPLY TO THE SUB TANKS ................................ 101
5.4.1 THE OCFS SYSTEM ........................................................................ 101
5.4.2 CONTROLLING INK SUPPLY DURING PRINTING ......................... 103
5.4.3 AIR DETECTION AND AIR PURGING ............................................. 103
5.4.4 AIR PURGE MECHANISM ............................................................... 104
5.4.5 AFTER AIR PURGING ..................................................................... 105
6. PRINTING ..................................................................................... 106
6.1 PRINTING DRIVE MECHANISM ............................................................... 106
6.2 CARRIAGE UNIT ....................................................................................... 107
6.3 PRINT HEAD UNIT .................................................................................... 110
6.4 PRINT HEAD ............................................................................................. 112
6.5 DRESS SENSOR ...................................................................................... 113
6.6 TEMPERATURE MONITORING ................................................................ 116
6.7 PRINT HEAD HEIGHT ADJUSTMENT ...................................................... 118
6.7.1 HEIGHT ADJUSTMENT MECHANISM ............................................ 118
6.7.2 RAISING AND LOWERING THE PRINT HEADS ............................. 119
6.8 MAINTENANCE UNIT................................................................................ 122
6.8.1 OVERVIEW ...................................................................................... 122
6.8.2 CAPPING/UNCAPPING ................................................................... 123
K1 Print Head Uncapping/Capping....................................................... 123
K2, C, YM Print Head Uncapping/Capping ........................................... 124
6.8.3 PRINT HEAD CLEANING CYCLE .................................................... 126
Step 2: Raising the Suction Cap .......................................................... 127
Step 3: Suction ..................................................................................... 128
Step 4: Scraping and Wiping ................................................................ 129
Detailed Descriptions iii D124