IV-3
1.2
Error codes
In the event of a printer failure, error codes will be indicated as shown below. All the
LEDs and the specific LEDs are turned ON alternately. The specific combination of
ON LEDs indicates the type of error.
Type of error
DATA
READY
ALARM
DRUM
Fuser Malfunction
Laser BD Malfunction
Scanner Malfunction
ROM Error
D-RAM Error
Service A *
Service B *
NV-RAM Error *
CPU Runtime Error
* Refer to the further description of those errors as follows;
•
Service A:
Address Error
•
Service B:
Bus Error
•
CPU Runtime Error:
Other CPU errors such as Illegal Instruction or Operation
Overflow
LED error indications
FUSER MALFUNCTION
DRUM
ALARM
READY
(PAPER)
DATA
(TONER)
A lapse of time
: OFF
: ON
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 ...
