COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)D. Power Save ModeWhen a power save command arrives from the printer board, the D-CPU (IC201)uses the GA (IC204) to cause the power save command signal (PSVE*) to go ‘0’, andsends the result to the main relay PCB, turning off the FET switch on the main relay PCBto stop +24 UH.When the PSAVE* signal goes ‘0’, on the other hand, the switching circuit on the DCcontroller PCB turns on to cause the +5 V power save signal (P5SAVE) to go ‘0’, there-by cutting power to the sensors operating under the control of the PSAVE signal.A command ending the power save mode from the printer mode causes the powersupply mechanism to resume normal mode.Figure 7-303CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS7-8CoverswitchesLoadsFETswitchDC controller PCB Main relay PCB Sub relay PCB+24VB+24VAR+24UHPSAVE*Pick-upPCB+24VB+24VAR+24VB+24UH+24UH+24UH+24UH+24UHP5SAVEP5SAVEP5SAVEP5SAVEP5SAVE+5V+24UHGASwitchingcircuitPSAVE*D-CPUCoverswitches(IC201)(IC204)+24VB+5RHigh-voltagePCB2/separationstatic eliminationhigh-voltagePCBSolenoid/clutch/pick-up motorSensorSensorSensorLaser driver/sensor BDPCBHigh-voltagePCB 1CartridgemotorPrinterboardDevelopingrotary motorPCBHeat dischargefan 1/heat dischargefan 2Pre-exposureLED relayPCBDevelopingrotary motor/solenoidHeat dischargefan 3/Pre-exposureLED assemblyDownload free service manual at http://printer1.blogspot.com
