Ricoh DD 4450 - Page 9

SM v C279
4.14.5 TEST POINTS ............................................................................ 4-85
MPU ................................................................................................... 4-85
PSU .................................................................................................... 4-85
5. SYSTEM MAINTENANCE REFERENCE ..................................... 5-1
5.1 SERVICE PROGRAM MODE .................................................................... 5-1
5.1.1 USING SERVICE PROGRAM MODES ............................................ 5-1
How to Select a Program Number ........................................................ 5-1
6. TROUBLESHOOTING................................................................... 6-1
6.1 FIRMWARE UPDATE ................................................................................ 6-1
6.1.1 TYPE OF FIRMWARE ...................................................................... 6-1
6.1.2 BEFORE YOU BEGIN ...................................................................... 6-2
6.1.3 PREPARING TO DOWNLOAD FIRMWARE .................................... 6-3
6.1.4 DOWNLOAD MAIN/ADF FIRMWARE .............................................. 6-5
6.1.5 DOWNLOAD FV-LT FIRMWARE ..................................................... 6-6
6.2 ELECTRICAL COMPONENT DEFECTS ................................................... 6-8
6.2.1 SENSORS ........................................................................................ 6-8
6.2.2 SWITCHES ..................................................................................... 6-16
6.2.3 POWER SUPPLIES ........................................................................ 6-18
6.2.4 CONTROLLER ............................................................................... 6-19
7. ENERGY SAVING ......................................................................... 7-1
7.1 ENERGY SAVE ......................................................................................... 7-1
7.1.1 ENERGY SAVE ................................................................................ 7-1
Timer Settings ...................................................................................... 7-1
Recommendation ................................................................................. 7-2
7.2 PAPER SAVE ............................................................................................ 7-3
7.2.1 EFFECTIVENESS OF THE COMBINE FUNCTION ......................... 7-3
Combine mode ..................................................................................... 7-3
Recommendation ................................................................................. 7-3
C279..................................................................................................... 7-3