COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)• During standby, the temperature is controlled to 165°C.• During printing, the temperature is varied to suit the selected fixing mode (Note).Reference:The voltage is highest in the reader unit while the scanner is moved in reverse duringprinting operation with the reader unit installed. As such, the fixing heater is turned off.B. Preventing Rush CurrentThe printer unit uses two heaters, and rush current would be appreciative if bothheaters were turned on at the same time.In the light of this, the printer unit uses the expansion I/O (IC203) at time of power-onto generate the rush current prevention drive signal (FXUONS) for the upper fixing heaterand the rush current prevention drive signal (FXLONS) for the lower fixing heater to turnon the sub drive circuit for a specific period of time to suppress the current applied to theheaters.CHAPTER 6 FIXING SYSTEM6-3Note:Fixing ModeThe printer unit sets the target temperature for the upper/lower fixing roller as followsaccording to the mode communicated by the printer board*1:Table 6-201*1 Reader controller PCB (when making prints with the reader unit installed).Full-colorMono-colorPlain papermode180°C180°CTranspar-ency mode175°C175°CThick papermode175°C175°CEnvelopemode185°C185°CSpecial fixingmode180°C180°CTarget temperatureColor modeFixing modeDownload free service manual at http://printer1.blogspot.com
