41309401TH Rev.4 224 /7.3 Alarm LED OnGo to 7.22 (Printer unit).Communication error?"COVER OPEN" on LCD?"PAPER JAM" alarm?"NO PAPER" alarm?StartNo"PRINTER ALARM i"alarm?1. Replace toner cartridge.2. Check photocoupler ofboard.3. Replace MCNT board.NoYesEndYesNoYesPress STOP key."TONER LOW" alarm?"DOCUMENT JAM"alarm?1. Check that the documenttransport path up to PC2is normal.2. Check PC2.3. Replace MCNT board.NoYesALARM LED goes off?NoYesNoNoNoYesYesReturn to section 7.1See 7.21 for further details.Note* : "PRINTER ALARM i" will be shown as follows:PRINTER ALARM 2 and PRINTER ALARM 4.Checking Points:Yes