Ricoh C252 Service Manual page 14

3.7 PAPER FEED..........................................................................................3-14
3.7.1 PAPER FEED ROLLER/FRICTION PAD .......................................3-14
3.7.2 PAPER FEED PRESSURE ADJUSTMENT ...................................3-15
3.7.3 PAPER SEPARATION PRESSURE ADJUSTMENT......................3-16
3.8 PRINTING ...............................................................................................3-17
3.8.1 PRESS ROLLER ............................................................................3-17
3.8.2 PAPER REGISTRATION ROLLER ................................................3-18
3.8.3 PRESS ROLLER RELEASE LEVER ADJUSTMENT .....................3-20
3.8.4 PRINTING PRESSURE ADJUSTMENT.........................................3-21
3.9 DRUM......................................................................................................3-22
3.9.1 PREPARATION ..............................................................................3-22
3.9.2 CLOTH SCREEN............................................................................3-22
3.9.3 CLAMPER / METAL SCREEN .......................................................3-24
3.9.4 INK PUMP ADJUSTMENT .............................................................3-26
3.9.5 DOCTOR ROLLER GAP ADJUSTMENT .......................................3-28
3.9.6 INK DETECTION ADJUSTMENT ...................................................3-29
3.10 PAPER DELIVERY................................................................................3-30
3.10.1 PAPER DELIVERY UNIT .............................................................3-30
3.10.2 DELIVERY BELT/PAPER EXIT SENSOR....................................3-31
3.10.3 VACUUM FAN MOTOR POSITION..............................................3-32
3.10.4 EXIT PAWL ADJUSTMENT .........................................................3-33
3.11 MAIN DRIVE..........................................................................................3-36
3.11.1 MAIN DRIVE TIMING BELT ADJUSTMENT ................................3-36
3.11.2 MAIN MOTOR PULLEY POSITION..............................................3-37
3.12 FIRMWARE UPDATE ...........................................................................3-38
TROUBLESHOOTING
4. TROUBLESHOOTING ................................................................. 4-1
4.1 ERROR CODES........................................................................................4-1
4.2 ELECTRICAL COMPONENT DEFECTS ..................................................4-2
4.3 FUSE, LED, VR, DIP-SW, AND TP TABLES ............................................4-4
4.3.1 BLOWN FUSE CONDITIONS ..........................................................4-4
4.3.2 LED'S ...............................................................................................4-4
4.3.3 VR'S .................................................................................................4-4
4.3.4 TEST POINTS ..................................................................................4-5
4.3.5 DIP SWITCHES................................................................................4-5
4.4 JAM DETECTION......................................................................................4-6
4.4.1 MASTER EJECT JAM (E JAM LOCATION INDICATOR) ................4-6
4.4.2 SCANNER JAM (P JAM LOCATION INDICATOR) ..........................4-7
4.4.3 MASTER FEED JAM (D JAM LOCATION INDICATOR) ..................4-8
4.4.4 DRUM JAM (B JAM LOCATION INDICATOR) .................................4-9
4.4.5 PAPER FEED JAM (A JAM LOCATION INDICATOR +  + ) ....4-10
4.4.6 PAPER DELIVERY JAM (C JAM LOCATION INDICATOR)...........4-11
C252 ii SM