COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 10 TROUBLESHOOTING10-47CauseAC power(printer unit)Fuse (powersupply of theprinter unit)Power supply(printer unit)Wiring/DCload, DC con-troller PCBStep123Yes/NoNONONOYESActionSee 3. “AC power isabsent in the printerunit.”Replace the fuse of thepower supply of theprinter unit.Replace the printer unitpower supply.Check the wiring fromthe DC controller PCB;if normal, replace theDC controller PCB.ChecksDisconnect the power plug from theprinter unit, and connect it to thepower plug directly. Is AC power pre-sent?Turn of the printer unit powerswitch1; in about 2 min, turn it on. Isthe operation normal?Turn off the printer unit power switch(Note 1), and disconnect the con-nector J204 from the DC controllerPCB. Connect the printer unit powerplug to the power outlet directly, andturn on the printer unit power switch.Is DC power (+5 V) present at theconnector J204-1? (See Note 1.)2 DC power is absent in the printer unit. (+5V, +24 VB)Note:The printer unit power switch (SW1) is blocked by a face cover after turning on theprinter unit at time of installing the reader unit. Do not touch unless this step must beperformed. Be sure to turn it on, and attach the face cover after the work.Download free service manual at http://printer1.blogspot.com
