The indicator lights tell you about the current status of the printer.

 

 : Solid

 : Blinking

 : Alternating Blinking

 : Doesn't matter

 

<Indicator Light Table>

POWER	DATA	ERROR	Meaning of LED indication
			External power in use
			Battery in use, > 14.0 Volts
			Battery in use, > 13.1 Volts
			Battery in use, > 10.0 Volts
			Battery in use, > 6.6 Volts
			Battery is discharging
			Battery is charging
			Printer is receiving data
			Unprinted data remains in buffer
			Printer is receiving flash upgrade
			Printer is in "service" mode
			Bad checksum of flash data
			No battery found when charging
			Time-Out when charging
			Low Thermal Head temperature
			High Thermal Head temperature
			Data Receive Error

 

 

<Indicator Light Warnings>

 

The POWER indicator light does not light

The printer is receiving no power. If you are using the AC adapter, make sure it is connected properly.
See the FAQ: How to connect to an AC outlet (Optional)
Make sure the AC power outlet is "live". If you are using a DC adapter, make sure power is connected and that the fuse is good.

 

No Battery Found When Charging

If this indication occurs immediately when attempting to charge the battery, the printer did not detect a battery when you tried to initiate a battery charging cycle. Make sure the battery has been installed and connected properly and that there are no broken wires at the battery or connector.
See the FAQ: How to install the Battery (Optional)

 

Time-Out When Charging

The printer believes that too much time was required to bring the battery up to a normal charge voltage. A maximum of 150 minutes is allowed for the charging cycle. This is an indication that the battery should be replaced.

 

Low Thermal Head Temperature

The temperature of the thermal head is too low for reliable printing (less than 0℃ (32℉)).
You need to use the printer in a warmer environment.

If this condition occurs in relatively warm environment (for example, at room temperature), the printer should be returned for service.

 

High Thermal Head Temperature

The temperature of the thermal head is too high. If allowed to become even hotter, the thermal head would begin imaging the paper in areas not intended to be printed. The printer will stop while the head cools down and then will resume printing. This condition is normal when printing documents with a great deal of "black" content.

 

To avoid or delay the onset of this condition, you can print using a lighter density setting, reduce the amount of "black space" being printed by removing background shading and colors (for example, background on Excel graphs or PowerPoint documents) and make sure that the printer is not enclosed and has adequate ventilation.

 

Data Receive Error

Data is being received but errors are causing the printer to request that it be re-transmitted.
This will slow printing speed and is almost always associated with the quality of an IrDA connection. Try repositioning the printer or host IrDA until the errors cease.