CHAPTER 11 TROUBLESHOOTINGCOPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 11-5920 The copy has poor sharpness. (out-of-focus)YES/NOYESYESNONOYESNOCause---------------OriginalLensMirrorpositionScannerCartridgeStep12345ChecksIs the image also too light?Is the original off the copyboard glass?Turn off and then on the power switch.Does the lens move smoothly?Is the horizontal ratio in Direct withinspecification?Clean the scanning lamp, reflectingplate, mirror, and lens. Is the problemcorrected?ActionCorrect the lightimage problem first.1. Check thecopyboard cover toosee if it happens tobe warping.2. Instruct the user onthe correct methodof placing originals.Check the lens rail forforeign matter, andclean it.Adjust the distancebetween No. 1 mirrorand the No. 2 mirror.End.Replace the cartridge.21 The copy is blank.YES/NONOYESNONONOYESNOCauseCartridgeDrum driveassemblyHigh-voltagetransformerPrimaryhigh-voltagechargingterminal,cartridgeStep123456ChecksIs the cartridge set in the machine?Does the cartridge have toner?Has the open seal been removed?Set the cartridge in the machine, andclose the machine. Does the drumcover shutter open properly?Does the drum drive gear rotatenormally?Is the primary charging terminal onthe front left of the cartridge in firmcontact with the high-voltage terminalat the machine's bottom?ActionSet the cartridge in themachine.Replace the cartridge.Remove the openingseal.Check the cartridge.Check the drum driveassembly.Check the high-voltage transformer(composite powersupply PCB).1. Check the contactsfor electrical conti-nuity.2. Replace the car-tridge
