Ricoh Russian-C2a Service Manual page 10

6.4.2 IMAGE DENSITY SENSOR ...........................................................6-16
6.5 FUSING/EXIT ..........................................................................................6-17
6.5.1 FUSING UNIT.................................................................................6-17
6.5.2 THERMISTORS .............................................................................6-17
6.5.3 THERMOFUSE ..............................................................................6-18
6.5.4 HOT ROLLER AND FUSING LAMP ...............................................6-20
6.5.5 PRESSURE ROLLER/CLEANING ROLLER ..................................6-21
6.5.6 PAPER EXIT SENSOR/PAPER OVERFLOW SENSOR................6-22
6.6 PAPER FEED..........................................................................................6-23
6.6.1 FEED ROLLERS ............................................................................6-23
6.6.2 PAPER END SENSOR...................................................................6-24
6.6.3 PAPER TRAY LIFT MOTORS........................................................6-25
6.6.4 REGISTRATION CLUTCH .............................................................6-26
6.6.5 PAPER FEED CLUTCHES.............................................................6-27
Lower Paper Feed Clutch ...................................................................6-27
Upper Paper Feed Clutch. ..................................................................6-27
6.6.6 RELAY CLUTCHES........................................................................6-28
6.6.7 PAPER SIZE DETECTOR..............................................................6-29
6.6.8 REGISTRATION SENSOR.............................................................6-30
6.6.9 RELAY SENSORS .........................................................................6-31
Upper Relay Sensor............................................................................6-31
Lower Relay Sensor............................................................................6-31
6.7 PCBS AND OTHER ITEMS.....................................................................6-32
6.7.1 CONTROLLER BOARD .................................................................6-32
6.7.2 SBCU BOARD................................................................................6-33
6.7.3 POWER PACK ...............................................................................6-33
6.7.4 MAIN MOTOR ................................................................................6-34
6.7.5 PSU ................................................................................................6-35
6.8 COPY ADJUSTMENTS: PRINTING/SCANNING ....................................6-36
6.8.1 PRINTING ......................................................................................6-36
Registration - Leading Edge/Side-to-Side...........................................6-36
Blank Margin.......................................................................................6-37
Main Scan Magnification.....................................................................6-37
Parallelogram Image Adjustment........................................................6-38
6.8.2 SCANNING.....................................................................................6-39
Registration: Platen Mode...................................................................6-39
Magnification.......................................................................................6-39
Standard White Density Adjustment ...................................................6-40
6.8.3 ADF IMAGE ADJUSTMENT...........................................................6-41
Registration.........................................................................................6-41
Sub Scan Magnification ......................................................................6-41
6.8.4 TOUCH SCREEN CALIBRATION ..................................................6-42
7 TROUBLESHOOTING ................................................................. 7-1
7.1 SERVICE CALL CONDITIONS .................................................................7-1
7.1.1 SUMMARY .......................................................................................7-1
7.1.2 SC CODE DESCRIPTIONS .............................................................7-2
7.2 SELF-DIAGNOSTIC MODE ....................................................................7-12
7.2.1 SELF-DIAGNOSTIC MODE AT POWER ON .................................7-12
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