Samsung ML-2251N/XAA Service Manual page 60

Alignment & Adjustments
6.1.2 Code
The DCU can be used in 2 modes – Status Monitoring and Self Diagnostic.
To use the DCU in Status monitoring mode connect the DCU and turn the printer power on. The 7 segment
LED display will show various codes that show the progress of the print operation.
1) Normal Code
When the printer is warming up or during a print job the display indicates the paper position.
Code State
78 System Initialisation
61 Warming up
00~05 Ready (exact code
depends on paper size)
20 Print Start
30 Feed Sensor On
40 Feed Sensor off
50 Paper Out
69 Sleep Mode
2) Error Code
If a problem is detected during the print process printing is stopped and an error code is displayed.
Code State
60, 62, 68 Fuser Error
64 Cover Open
65 CRU Error
70 No Paper
71 Paper Jam 0
72 Paper Jam 1
73 Paper Jam 2
95 LSU Not Ready
Service Manual
6-2
The main processor is starting up
The printer is on, the cover is open or close.
The printer is ready. The paper is detected when the first page is printed.
00: Legal, 01: Letter, 02: A4, 03: EXEC, 04: B5
The engine controller received the print order from the video controller.
20: 1st, 21: MP, 22: SCF
The paper is passing out of the Feed Sensor.
The paper has passed out of the Feed Sensor.
The paper has passed out of Exit Sensor.
The fuser power is turned off to minimize the power consumption.
Description
An error has occurred in the fuser. See section 4.3.5.9.
• 60: Open Fuser Error
• 62: Low Heat Error
• 68: Over Heat Error
The Printer Cover is open.
The Toner Cartridge is not installed,
No paper in the paper cassette.
The front part of paper is jammed between pickup unit and Feed sensor.
The front part of paper is jammed between the Exit sensor and Feed
sensor.
The front part of paper is jammed just after passing through the Exit
sensor.
LSU Scanner Motor not ready or Hsync signal not output.
Description
Samsung Electronics