Brother HL-720 manual Service Calls, Nv-Ram

English: HL-YL User’s Guide, Chapter 6

USER’S GUIDE

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 error
	malfunction	malfunction	malfunction
Drum	●	❍	●	❍
Alarm	❍	●	●	❍
Ready	❍	❍	❍	●
Data	❍	❍	❍	❍
Service Call	D-RAM error	Service A	Service B	Service C
Drum	●	❍	●	❍
Alarm	❍	●	●	❍
Ready	●	●	●	❍
Data	❍	❍	❍	●
Service Call	Service D	Service E0	Service E1	Service P
Drum	●	❍	●	❍
Alarm	❍	●	●	❍
Ready	❍	❍	❍	●
Data	●	●	●	●
Service Call	NV-RAM
	error
Drum	●
Alarm	❍
Ready	●
Data	●	● ON	❍ OFF

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.

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