Ricoh A250 Service Manual page 30

4. SERVICE TABLES ...................................................................... 4-1
4.1 PRECAUTION .......................................................................................... 4-1
4.2 SERVICE PROGRAM MODE OVERVIEW .............................................. 4-1
4.2.1 HOW TO ENTER THE SP MODE ................................................... 4-1
Entering Printer SP mode..................................................................... 4-1
Exiting SP mode................................................................................... 4-1
4.2.2 SP MODE TABLE ............................................................................ 4-1
Service Menu ....................................................................................... 4-2
Service Tools ....................................................................................... 4-2
4.3 SERVICE MENU....................................................................................... 4-2
4.3.1 BIT SWITCH PROGRAMMING ....................................................... 4-2
Bit Switches.......................................................................................... 4-2
4.3.2 NVRAM RESET ............................................................................... 4-3
Diag. Error Log and Paper Tray Setting Reset..................................... 4-3
Controller NVRAM Reset ..................................................................... 4-3
NIB NVRAM Reset............................................................................... 4-3
Counter Reset ...................................................................................... 4-3
4.3.3 POWER-ON DIAGNOSTICS ERROR DISPLAY ............................. 4-4
4.3.4 SERVICE SUMMARY ...................................................................... 4-4
4.4 SERVICE TOOLS ..................................................................................... 4-5
4.4.1 HDD TEAT ....................................................................................... 4-5
4.4.2 HDD FORMAT ................................................................................. 4-6
4.4.3 NIB NVRAM BACKUP AND RESTORE............................................ 4-6
4.5 FIRMWARE UPDATE............................................................................... 4-8
4.5.1 FIRMWARE DOWNLOAD (CONTROLLER, NIB AND PS3) ........... 4-8
4.5.2 FIRMWARE UPLOAD (CONTROLLER ONLY) ............................. 4-10
4.5.3 ERROR RECOVERY ..................................................................... 4-11
Controller............................................................................................ 4-11
PS3 DIMM/NIB................................................................................... 4-11
4.6 POWER-ON SELF TEST........................................................................ 4-12
4.6.1 PARALLEL LOOP-BACK TEAT..................................................... 4-12
4.6.2 OTHER TESTS.............................................................................. 4-12
5. REMOVAL AND REPLACEMENT .............................................. 5-1
5.1 PRECAUTIONS ........................................................................................ 5-1
5.2 CONTROLLER ......................................................................................... 5-1
5.3 NIB............................................................................................................ 5-3
6. TROUBLESHOOTING................................................................. 6-1
6.1 SC CODES ............................................................................................... 6-1
6.2 ERROR CODES ....................................................................................... 6-1
6.3 LED DISPLAY........................................................................................... 6-2
6.3.1 LOCATION....................................................................................... 6-2
6.3.2 FATAL ERROR................................................................................ 6-3
6.4 ROM HISTORY......................................................................................... 6-5
6.4.1 ROM HISTORY – B305 .................................................................... 6-5
A250 ii
Rev. 04/2000
SM