Canon BJC-8500 Service Manual

Also see for BJC-8500: User manual

Contents

3.6 EEPROMThe EEPROM stores various settings such as the total number of sheets passed, BJcartridge installation count, and the total waste ink absorption amount. The totalnumbers of sheets passed and total waste ink absorption amount can serve as areference for how much the printer has been used.The EEPROM must be initialized or the waste ink level must be cleared when the logicboard, EEPROM, or the waste ink absorbers are replaced.For details, see"Part 5: 4.4 Waste Ink Absorber" (page 5-10).3.6.1 Continued use of EEPROM memory dataWhen the logic board has been replaced, continued use of the EEPROM memory datais possible by attaching the old EEPROM on the new logic board. The EEPROM isattached by socket, so only the EEPROM can be removed and attached.3.6.2 Resetting the EEPROM"Waste ink full" is detected based upon the total waste ink absorption amount storedin EEPROM. When the waste ink absorber is replaced, the total waste ink absorptionamount in the EEPROM must be reset. (For details on how to clear waste ink level inthe service mode, see"Part 3: 3.4.2 Service mode" (page 3-24).)Furthermore, when the logic board is replaced, the service data in the new logicboard’s EEPROM must be reset, and all waste ink absorbers must also be replaced atthe same time. (For details on how to initialize the EEPROM in the service mode, see"Part 3: 3.4.2 Service mode" (page 3-24).)EEPROM initialization involves the following operations (the waste ink level clearsetting is only set to "0" (zero).):(1) The device ID is set to the overseas destination. (BJC-8500)(2) The total number of sheets passed (Black BJ cartridge BC-80 + Color BJ cartridgeBC-81) is set to "0" (zero).(3) The total number of sheets passed (Color BJ cartridge BC-81 + Photo BJ cartridgeBC-82 Photo) is set to "0" (zero).(4) The Black BJ cartridge BC-80 installation count is set to "0" (zero).(5) The Color BJ cartridge BC-81 installation count is set to "0" (zero).(6) The Photo BJ cartridge BC-82 Photo installation count is set to "0" (zero).(7) The waste ink level is set to "0" (zero).(8) The waste ink optimizer level is set to "0" (zero).(9) The cleaning count is set to "0" (zero).(10) The software ON time is set to "0" (zero).(11) The head position adjustment value (bi-directional of one BJ cartridge; 1 unit =1/1200 inch) is set to "0" (zero).(12) The head position adjustment value (vertical direction between two BJcartridges; 1 unit = 1/600 inch) is set to "0" (zero).(13) The head position adjustment value (horizontal direction between two BJcartridges; 1 unit = 1/600 inch, 1/1200 inch) is set to "0" (zero).(14) The heater resistance value is set to "0" (zero) (undefined value).(15) The head temperature sensor resistance value is set to "0" (zero) (undefinedvalue).(16) The LED duty for detection of ink-out is set to 50,000.(17) The amount of ink used after the no ink error is displayed is set to "0" (zero).(18) The wiping count is set to "0" (zero).(19) The pumping count is set to "0" (zero).(20) The dot count for judging ink-out is set to "0" (zero).3-27BJC-8500Part 3: Operating Instructions