Brother HL-1040, HL-820, HL-1020 manual Service Calls, Drum Alarm Ready Data

Error	Action
Serial Interface Input	￿￿	Press the panel switch to resume printing.
Buffer Overflow (For	￿￿	Check the communication parameters such as the handshake
HL-1040/1050 Only)		protocols on both your computer and printer.
	￿￿	If the error occurs again, the interface hardware may be
		damaged. Consult your dealer.

✒NOTE

If the printer does not operate as you expect it to, it is recommended that you turn off the power switch, wait a few seconds and then turn it on again. If you still have problems, consult your dealer or our authorized service representative.

Service Calls

If an unrecoverable error occurs, the printer indicates the need for a service call by lighting all the lamps and then the following combination of lamps alternately:

Service Call	Fuser	Laser BD	Scanner	ROM	D-RAM
	malfunction	malfunction	malfunction	error	error
Drum	●	❍	●	❍	●
Alarm	❍	●	●	❍	❍
Ready	❍	❍	❍	●	●
Data	❍	❍	❍	❍	❍
Service Call	Service A	Service B	Service C	Service D	Service E0
Drum	❍	●	❍	●	❍
Alarm	●	●	❍	❍	●
Ready	●	●	❍	❍	❍
Data	❍	❍	●	●	●
Service Call	Service E1	Service P	NV-RAM	CPU runtime
			error	error
Drum	●	❍	●	●
Alarm	●	❍	❍	●
Ready	❍	●	●	●	❍ OFF
Data	●	●	●	●	● ON

If you see any of these service call indications, turn off the power switch, wait a few seconds and then turn it on again and try to print again.

If you cannot clear the error and see the same service call indication after turning on the printer, consult your dealer or our authorized service representative. Report the error status and situation referring to the above table.

✒NOTE

Be sure that the top cover and the main controller board are firmly installed.

✒NOTE

If you have any problems other than described in this section, see “CHAPTER 6 TROUBLESHOOTING, Q & A” of the On-line User’s Guide . If you are still unable to clear the problem after reviewing the information in the User’s Guide, consult your dealer.

- 32 -