Ricoh FW780 Service Manual page 217

1. OVERALL MACHINE INFORMATION ......................................... 1-1
1.1 SPECIFICATIONS..................................................................................... 1-1
1.2 PAPER PATH ............................................................................................ 1-3
1.4 MECHANICAL COMPONENT ................................................................... 1-4
1.5 DRIVE LAYOUT ........................................................................................ 1-6
1.6 ELECTRICAL COMPONENT DESCRIPTIONS ........................................ 1-7
2. DETAILED SECTION DESCRIPTIONS........................................ 2-1
2.1 DRUM ........................................................................................................ 2-1
2.1.2 DRUM DRIVE.............................................................................................................. 2-1
2.3 EXPOSURE............................................................................................... 2-2
2.3.2 PAPER AND ORIGINAL FEED (A252 ONLY) ............................................................ 2-2
2.4 DEVELOPMENT........................................................................................ 2-4
2.4.2 TONER DENSITY CONTROL..................................................................................... 2-4
2.8 FUSING AND PAPER EXIT ...................................................................... 2-5
2.8.1 OVERVIEW (A252 COPIER) ...................................................................................... 2-5
3. INSTALLATION............................................................................ 3-1
3.1 INSTALLATION REQUIREMENTS ........................................................... 3-1
3.1.1 ENVIRONMENT .......................................................................................................... 3-1
3.1.2 MINIMUM SPACE REQUIREMENTS ......................................................................... 3-2
3.1.3 MACHINE LEVEL........................................................................................................ 3-2
3.1.4 POWER SOURCE ...................................................................................................... 3-3
3.2 INSTALLATION PROCEDURES ............................................................... 3-4
3.2.1 COPIER....................................................................................................................... 3-4
3.2.2 TABLE (A836) ........................................................................................................... 3-12
3.2.3 COPY TRAY (A836-10)............................................................................................. 3-14
3.2.4 ROLLER FEEDER (A571)......................................................................................... 3-18
4. SERVICE TABLES ....................................................................... 4-1
4.3 SERVICE TOOLS...................................................................................... 4-1
4.3.1 SERVICE PROGRAM MODE ..................................................................................... 4-1
4.3.2 INPUT/OUTPUT CHECK MODE ................................................................................ 4-9
4.4 JAM CODE LIST...................................................................................... 4-11
4.4.2 JAM CODE TABLE.................................................................................................... 4-11
4.6 SERVICE REMARKS .............................................................................. 4-15
4.6.12 AC DRIVE BOARD.................................................................................................. 4-15
5. REPLACEMENT AND ADJUSTMENT ......................................... 5-1
5.2 OPTICS ..................................................................................................... 5-1
5.2.1 ORIGINAL FEED UNIT REMOVAL (A252 ONLY) ...................................................... 5-1
5.2.2 EXPOSURE GLASS REMOVAL (A252 ONLY) .......................................................... 5-2
5.2.3 FIBER OPTICS ARRAY REMOVAL (A252 ONLY) ..................................................... 5-2
5.2.4 EXPOSURE LAMP REMOVAL ................................................................................... 5-3
5.2.5 LIGHT SENSOR REPLACEMENT (A252 ONLY) ....................................................... 5-4
5.2.6 SYNCHRO-CUT LENGTH ADJUSTMENT (A252 ONLY) .......................................... 5-5
5.4 DRUM UNIT............................................................................................... 5-6
5.4.1 DRUM UNIT REMOVAL.............................................................................................. 5-6
TOC
TABLE OF CONTENTS
i A251/A252