COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 10 TROUBLESHOOTING10-301 E000/E003CauseUpper thermis-tor (open cir-cuit)Lower thermis-tor (open cir-cuit)Upper fixingheater, Upperthermal switch(open circuit)Lower fixingheater, Lowerthermal switch(open circuit)Upper/LowerthermistorUpper/lowerthermistorConnectorPower supply(printer unit)Step12345678Yes/NoNONONONONOYESNOYESNOActionCheck the wiring fromthe connector J222 onthe DC controller PCBto the upper thermistor;if normal, replace theupper thermistor.Check the wiring fromthe connector J222 onthe DC controller PCBto the lower thermistor;if normal, replace thelower thermistor.Check the upper fixingheater and the thermalswitch. Replace anyproblem parts.Check the lower fixingheater and the lowerthermal switch.Replace any problemparts.Mount the thermistorproperly.Clean the area of con-tact with theupper/lower fixingroller.Connect the connec-tors securely.End.Replace the DC controlPCB.ChecksRemove the fixing assembly, andmeasure the resistance between theconnectors J26F-A4 (FXTHU) andJ26F-A3 (GND) on the fixing assem-bly side. Is it between 250 K and600 K (normal temperature)?Measure the resistance between theconnectors J26F-A2 (FXTHL) andJ26F-A1 (GND) on the fixing assem-bly side. Is it between 250 K and600 K (normal temperature)?With the fixing assembly removed, isthere electrical continuity betweenthe connectors J27F-3 (HTUH) andJ27F-4 (HTUC) on the fixing assem-bly side?Is there electrical continuity betweenthe connectors J26F-3 (HTLH) andJ26F-4 (HTLC) on the fixing assem-bly side?Is the upper/lower thermistor in evencontact with the upper/lower fixingroller?Mount the thermistor properly.Are the connector J222 on the DCcontroller PCB and the connectorJ26 of the fixing assembly connect-ed securely?Replace the power supply of theprinter unit. Is the problemcorrected?If E001 or E003 is indicated, be sure to discharge the error memory capacitor (C259)on the DC controller PCB after troubleshooting the problem, as it may contain errormemory. (Short JP201 on the DC controller PCB to discharge C259.)Caution:Download free service manual at http://printer1.blogspot.com
