PJ-623

FAQs & Troubleshooting

What do the indicator lights mean?

The indicators light and flash to indicate the printer's status. The following symbols are used in this FAQ to explain the meaning of the different indicator colors and patterns.

or or	Indicator is lit in the color shown
or or	Indicator is blinking in the color shown
or	Indicator is blinking in alternating colors as shown
	Indicator is lit or blinking in any color or pattern
	Indicator is off

STATUS	Description	Solution
	AC adapter/ DC cable/ Rechargeable Li-ion battery in use
	Rechargeable Ni-MH battery in use
	Rechargeable battery in use, battery charge is full
(Once every 4 seconds)	Rechargeable battery in use, battery charge is half-full
(Twice every 4 seconds)	Rechargeable battery in use, battery charge is low
(Once every second)	Rechargeable battery needs to be charged
	Rechargeable Ni-MH battery is discharging
	Rechargeable Ni-MH battery is charging
	Printing or receiving data
	Buffer contains unprinted data
	Receiving flash upgrade
	Printer Receiving upgrade
	Printer is in service mode (for cleaning the platen roller or printing a printer report)
	System error (call for service)
	The POWER indicator does not light	The printer is receiving no power. If you are using AC or DC power, make sure that the AC adapter or DC cable is properly connected (See "How to connect to an AC power outlet (Optional)" or "How to connect to a DC power outlet (Optional)".) and make sure that the AC or DC power outlet is turned on. If you are using DC power, check the fuse.
	No rechargeable Ni-MH battery found when charging	The printer did not detect a rechargeable Ni-MH battery when you tried to charge the battery. Make sure that the rechargeable Ni-MH battery is installed properly and that there are no broken wires at the battery or connector. (See "How to install the Ni-MH Battery (Optional)".) If the rechargeable Ni-MH battery is connected properly, the battery may have overheated while charging. Allow the rechargeable Ni-MH battery to cool before charging it again. If this is a reoccurring problem, replace the rechargeable Ni-MH battery.
	Time-out when charging the rechargeable Ni-MH battery	Too much time is needed to charge the rechargeable Ni-MH battery (normally the battery should be fully-charged within 120 minutes). Replace the rechargeable Ni-MH battery.
	Head or motor is cooling down	The thermal head or motor is too hot. Head: If the thermal head becomes even hotter, the thermal head may produce imaging on the paper in areas not intended to be printed. This condition is normal when printing documents with a great deal of "black" content. The printer will stop and resume printing after the print head has cooled down. To avoid or delay the onset of this condition, print using a lighter density setting, reduce the amount of black space being printed (for example, remove background shading and colors in graphs and presentation documents), and make sure that the printer has adequate ventilation and is not located in an enclosed space. Motor: Do not use the printer continuously. If the printer is used continuously, the motor will become too hot. In this case, the printer will stop and resume printing after the motor has cooled down. This condition may occur more often when the printer is used at high altitude (more than 10,000 feet) due to a lower air density available to cool the printer.
	Data reception error	Data is not being received properly, most likely because of a poor IrDA connection. Reposition the printer and/or IrDA port on the computer and try again.
	Buffer full or format error
	Printer is in boot mode	The AC adapter was unplugged while the firmware was being updated, and the printer started up in boot mode the next time it was started. Contact your reseller or Brother Customer Service for assistance.
	Ready for Bluetooth communication