USER’S GUIDE
CHAPTER 3 –2
Data (Toner) Lamp
The Data lamp indicates the current status of the print data process.
Lamp Printer status
Off
❍
The printer has no print data.
Blinking
❍↔●
The printer is receiving data from the computer or
the printer is processing data in memory.
On
●
Print data remains in the printer memory. If the Data
lamp is on for a long period of time and nothing has
printed, you need to press the switch to print the
remaining data.
This lamp also works as the Toner lamp with the Alarm lamp. They blink
simultaneously to indicate a toner error. See
Drum Lamp
The Drum lamp indicates the drum unit is nearly at the end of its life.
Lamp Printer status
Off
❍
The drum unit can be used.
On
●
The drum unit is nearly at the end of its life.
Installing a new drum unit turns off this lamp. See
Alarm Lamp
The Alarm lamp blinks to indicate a printer error status such as “Cover
Open” and “Memory Full.” If any other error occurs, the printer indicates
the error by blinking the Alarm lamp with another lamp or by printing an
error report.
✒
Note
The Ready, Data and Drum lamps are used to indicate printer errors with
the Alarm lamp. See
“ALARM INDICATIONS AT A GLANCE”
Chapter 6 and take corrective action for the error.
Summary of Contents for HL-720
Page 1: ...SERVICE MANUAL MODEL HL 720 730 730Plus R LASER PRINTER ...
Page 36: ...II 19 1 3 10 Engine I O HL 720 Fig 2 21 shows the engine interface circuit Fig 2 21 ...
Page 37: ...II 20 HL 730 730Plus Fig 2 22 shows the engine interface circuit Fig 2 22 ...
Page 61: ... Fig 3 18 2 4 1 1 1 ...
Page 92: ...SERVICE MANUAL MODEL HL 760 R LASER PRINTER ...
Page 109: ...II 8 1 3 4 DRAM Two 4M bit DRAMs x 16bits are used as the RAM Fig 2 6 ...
Page 113: ...II 12 1 3 10 Engine I O Fig 2 12 shows the engine interface circuit Fig 2 12 ...
Page 114: ...II 13 1 3 11 Paper Feed Motor Drive Circuit Fig 2 13 ...
Page 133: ...Appendix 2 Main PCB Circuit Diagram 1 3 CODE UK3227000 B48K272CIR 1 3 NAME ...
Page 134: ...Appendix 3 Main PCB Circuit Diagram 2 3 CODE UK3227000 B48K272CIR 2 3 NAME ...
Page 135: ...CODE UK3227000 B48K272CIR 3 3 NAME Appendix 4 Main PCB Circuit Diagram 3 3 ...