USER’S GUIDE
CHAPTER 6 –4
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
malfunction
Laser BD
malfunction
Scanner
malfunction
ROM error
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.
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 ...