HP Digital Copier Service Mode Figure 3-4 Copy Module Service Mode To enter service mode, hold down the R ESET , 0 , and 1 keys while you turn on the power. The copy module skips its normal power up self-tests. G Reset the ADF cleaning counter and maintenance counter to zero when you perform cleaning and maintenance procedures. G In case of a failed EEPROM, reprogram the copy module’s serial number from the Serial Number Management Menu. G Use the Calibration Menu to recalibrate the copy module when you replace the following parts: • Lamps • Optics • ADF Assembly • Carrier Unit • Flatbed Cover Assembly • Control PCA with EEPROM C4265-90907 HP Digital Copier Service Mode 145