143Replace a defective printheadAttention: Always store printheads near the printer or allow the printheads toadjust to the printers environmental conditions before you insert them in to OcéTCS300 printer.Attention: Do not open the top cover when you are not in the wizard. When youopen the top cover outside the wizard, the system produces a long, uninterruptedaudio signal audio signal. When you open the top cover during printing, theprinter stops and the red LEDs on the printer operator panel remain illuminated.After you close the cover, the print is cut. Then the whole print job is restarted.How to remove a printhead1. Press the on-line / off-line key on the printer operator panel to set the printer off-line.2. Use the upper softkeys to scroll to the 'Replace printhead' card.[83]3. Press the softkey below the 'Replace printhead' card to enter the wizard.An introduction screen displays the message 'Use this wizard to replace printheads.A roll is needed for calibration.'4. Press the key for 'Next'.The screen displays the message 'Select roll to use'.The system does a calibration at the end of the wizard. You can only calibrate on thedefined media types (see ‘Set up unattended / overnight printing optimisation’ onpage 67). When calibration is not possible with the media available on the printer,the system asks you to load the correct media. When calibration is possible with oneof the rolls, the system automatically uses the correct media roll. When calibrationis possible with both rolls, use the lower softkeys to select the roll to use.5. Press the key for 'Next'.The screen displays the message 'Carriage moving to centre position...' while thecarriage moves to the centre.The screen displays 'Open top cover.'6. Open the top cover.
