41316401TH Rev.4 118 /4.2 Adjustments after Parts ReplacementAdjustment to be implemented after each part replacement is described below.Adjustment and correction of color registration are always required for each part replacement.*Note: When the EEPROM of the PU (K71 Board) is replaced to a new one, color balance must beadjusted.4.2.1 Precautions in replacing engine controller boardWhen replacing the engine controller board (71K PWB), remove the EEPROM from the board andmount it on a new board (for errors other than those of engine EEPROM).When the “SERVICE CALL XX” (an engine EEPROM error) message is displayed on the operatorpanel, the EEPROM must be replaced with new one. In this case, perform the operation describedin Section 4.2.2.4.2.2 Precautions in replacing EEPROMWhen the EEPROM is not removed from the board and placed on the new board at the time of(engine controller board (71K PWB)) replacement, or when the EEPROM is replaced with new one,the version read (fuse cut) function shown in Section 2.14 is disabled. The printer must be switchedfrom the factory mode to the shipping mode using the following setting procedure:Changing the setting using operator panel1. Remove the main controller board.2. While holding the 11111 and 44444 keys down, turn the power on to enter the engine maintenancemode (level 1).3. With “ENGINE DIAG MODE XX.XX” on the display, press the 22222 and 44444 keys to enter the enginemaintenance mode (level 3).4. Press the 11111 and 55555 keys until “LOCAL PARAMETER SET” appears on the upper display.5. Press the 22222 and 66666 keys until “FACTORY WORKING MODE” appears.6. While “FACTORY WORKING MODE” is being displayed, use the 33333 and 77777 keys to select asetting value.7. Select “SHIPPING MODE” (fuse cut enabled), press the 33333 and 77777 keys in combination. Then,the mode name stops blinking and the set value is registered.Replaced PartLED HeadDrum Cartridge (Y, M, C, K)Fuser UnitBelt Cassette AssyPU (K71 Board)CU (CRM Board)AdjustmentColor balance adjustmentNot required.Not required.Not required.Re-mounting the EEPROM used prior to the replacement *NoteRe-mounting the EEPROM used prior to the replacement *Note
