Ricoh G108 Service Manual page 17

Countermeasures ...............................................................................4-20
4.2.25 UNEVEN DENSITY AMONG DIFFERENT PAGES .....................4-21
Symptom.............................................................................................4-21
Possible Cause ...................................................................................4-21
Countermeasures ...............................................................................4-21
4.3 ELECTRICAL COMPONENT ..................................................................4-22
4.3.1 SENSORS ......................................................................................4-22
Reflective Photo Sensors....................................................................4-22
Photo Sensors ....................................................................................4-22
4.3.2 BLOWN FUSE CONDITION...........................................................4-23
4.3.3 LED.................................................................................................4-23
Operation Panel ..................................................................................4-23
Controller ............................................................................................4-23
BCU ....................................................................................................4-23
4.4 DUPLEX UNIT..........................................................................................4-23
SERVICE TABLES
5. SERVICE TABLES....................................................................... 5-1
5.1 SERVICE PROGRAM MODE....................................................................5-1
5.1.1 OPERATING SERVICE PROGRAM MODE.....................................5-1
Activating SP Mode...............................................................................5-1
Selecting a Service Program ................................................................5-2
Specifying a Setting ..............................................................................5-2
Quitting SP Mode..................................................................................5-2
5.1.2 SERVICE..........................................................................................5-3
Tables ...................................................................................................5-3
Bit Switches ..........................................................................................5-6
Adjusting Printer Gamma......................................................................5-7
Toner Control Set (Service SP1-101) ...................................................5-9
5.1.3 ENGINE..........................................................................................5-10
SP1: Feed...........................................................................................5-10
SP2: Drum ..........................................................................................5-11
SP5: Mode ..........................................................................................5-12
SP7: Data Log ....................................................................................5-22
SP8: Data Log 2 .................................................................................5-27
5.1.4 MEMORY CLEAR/COUNTER CLEAR ...........................................5-36
5.1.5 TELEPHONE NUMBER SETTING (SP5-812)................................5-37
5.2 FIRMWARE UPDATE .............................................................................5-38
5.2.1 TYPES OF FIRMWARE .................................................................5-38
5.2.2 PRECAUTIONS..............................................................................5-38
Handling SD Card ...............................................................................5-38
Upload or Download ...........................................................................5-38
Network Connection............................................................................5-38
5.2.3 FILE ARRANGEMENT ...................................................................5-39
How The Program Works....................................................................5-39
Example..............................................................................................5-39
5.2.4 UPDATING .....................................................................................5-40
SM v G108