COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 10 TROUBLESHOOTING10-841. Do not disconnect the power cord while the printer is in service mode. (Be sure toturn off the power first to end service mode; however, do not turn off the powerwhile test mode, read memory mode, or write memory mode is under way.)2. When the power is turned on normally, various adjustment data in the EEPROM onthe DC controller PCB is mounted to the printer unit and the paper is turned on nor-mally, the data stored on the printer board will be lost. If you are replacing the DCcontroller PCB, be sure to write the various adjustment data in read memory modeto the RAM on the printer board, and then write it to the EEPROM on the new DCcontroller PCB in write memory mode.Figure 10-601Figure 10-602Caution:Printer boardPower Turned On NormallyDC controller PCBRAMEEPROMEEPROMWritingFor back-upPrinter boardPower Turn On in Service ModeDC controller PCBRAMEEPROMEEPROMWritingFor back-up (stored)Download free service manual at http://printer1.blogspot.com
