Samsung ML-1200, ML-1210 Fault Signs Cause & Check Solution White Black spot, Recycled product

Page 36

Troubleshooting

 

 

Fault

Signs

Cause & Check

Solution

 

 

 

 

 

 

 

 

White Black spot

• Light or dark black

1. If light or dark periodical black

1. In case of 1 above -

 

 

 

 

dots on the image

dots occur, this is because the

Run OPC Cleaning Mode Print

 

 

Digital Printer

 

occur periodically.

developer rollers are contami-

4-5 times repeatedly to remove.

 

 

 

 

nated with foreign substance

Especially check foreign sub-

 

 

Digital Printer

 

 

 

 

 

• White spots occur

or paper particles.

stance on the OPC surface, then

 

 

Digital Printer

 

in the image period-

(1)35mm interval : Charged

remove them with a clean gauze

 

 

Digital Printer

 

ically.

roller

moistened with IPA(Isopropyl

 

 

Digital Printer

 

 

(2)75mm interval : OPC cycle

Alcohol) not to damage OPC if

 

 

 

 

 

 

necessary.

 

 

 

 

 

2. If white spots occur in a black

Never use usual alcohol.

 

 

 

 

 

 

 

 

 

 

2. In case of 2

 

 

 

 

 

image at intervals of 75mm, or

 

 

 

 

 

If they are not disappeared by

 

 

 

 

 

black spots occur elsewhere,

 

 

 

 

 

running OPC Cleaning Mode

 

 

 

 

 

the OPC drum is damaged or

 

 

 

 

 

Print 4-5 times.

 

 

 

 

 

foreign substance is stuck to

 

 

 

 

 

: at intervals of 37mm - Replace

 

 

 

 

 

the surface.

 

 

 

 

 

the developer.

 

 

 

 

 

 

 

 

 

 

 

 

: at intervals of 75mm - Remove

 

 

 

 

 

 

foreign substance.

 

 

 

 

 

 

: Broken image - Replace the

 

 

 

 

 

 

developer according to care-

 

 

 

 

 

 

lessness.

 

 

 

 

 

3. If a black and white or graphic

3. In case of 3 - Exchange the

 

 

 

 

 

image is partially broken at

transfer roller because the life of

 

 

 

 

 

irregular intervals, the transfer

the transfer roller in use has been

 

 

 

 

 

roller's life has been expired or

expired. (Check the transfer volt-

 

 

 

 

 

the transfer voltage is abnor-

age and readjust if different.)

 

 

 

 

 

mal.

 

 

 

 

 

 

 

 

 

Recycled product

• Poor appearance of

1. Poor appearance of the devel-

1. In case of 1 -

 

 

 

 

the developer.

oper.

(1)If there is an evidence of disas-

 

 

 

 

 

(1)Check the damage to label

sembling the developer.

 

 

 

 

• Unclean and rough

and whether different materi-

(2)If materials other than normal

 

 

 

 

printouts.

als are used.

parts of the developer are

 

 

 

 

 

(2)Check the appearance of

added or substituted.

 

 

 

 

• Bad background in

parts of the developer, such

 

 

 

 

 

the image.

as frame, hopper.

 

 

 

 

 

 

2. Unclean and rough printouts.

2. In case of 2 - If there are any

 

 

 

 

 

(1)Check whether foreign sub-

abnormals in connection with the

 

 

 

 

 

stance or toner are stuck to

situation of 1.

 

 

 

 

 

the terminal (contact point) of

(1)It occurs when the developer

 

 

 

 

 

the developer.

is recycled over 2 times.

 

 

 

 

 

(2)Check whether the state of

(2)If toner nearly being expired

 

 

 

 

 

the terminal assembly is nor-

are collected to use, it is

 

 

 

 

 

mal.

judged as the recycled devel-

 

 

 

 

 

 

oper.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Samsung Electronics

4-23

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Page 35 Page 37
Contents Laser Printer Version no This manual is stated and provided for service description Safety Precautions Precautions on Disassembly and ReassemblySafety Precautions Replacing PrecautionsTools for Troubleshooting Electronic ScaleML-1210 ML-1220M ML-1250 Engine ControllerPaper TonerCover Assembly Front CoverOther Covers LED Panel PBA LSULaser Scanning UnitMotor Assembly Transfer RollerFuser Assembly Hvps BoardThermostat and Halogen Lamp Smps Board Main Board and Sensor Board How to use DCU Cause and solution of Bad imageCause and solution of the bad discharge Cause and solution of the malfunctionHow to use DCU DCU SetupCode Self Diagnostic Mode Self Test Button Paper Path LayoutPTL Test Fan TestCause and solution of Bad image Check and Cause SolutionVertical Black Line and Band Vertical White LineHorizontal Black Band Black/White SpotLight Image Dark Image or a BlackUneven Density BackgroundGhost Satins on the Face Terminal of the supply rollerDescription Digital Printer Satins on Back Blank Page Print outCause and solution of the bad discharge Wrong Print Position2 JAM 3 JAM 4 JAMMulti-Feeding Paper rolled in the fuser7 OPC Cause and solution of the malfunction All LEDs blinking Fuser ErrorAll LEDs blinking Scan Error Not function of the gear of the fuser due to melting away Paper EmptyPaper Empty without indication No lamp on when the cover is open Cover OpenNo Power Defective motor operationVertical Line Getting Curved Toner Cartridge Service Precautions on Safe-keeping of Toner CartridgeService for the Life of Toner Cartridge Fault Signs Cause & Check Solution Light image Signs and Measures at Poor toner cartridgePartially blank ImageFault Signs Cause & Check Solution White Black spot Recycled productFault Signs Cause & Check Solution Ghost & Image Cause and solutions of bad environment of the software Printer is not workingUtilities program Abnormal Printing Spool Error How to delete the data in the spool managerExploded Views and Parts List Exploded Views and Parts List Service Parts ListExploded Views and Parts List Front Assembly No DescriptionEngine/Frame Lower Assembly 15-2 15-1 14-2 Shield Engine Unit Assembly RX Drive Assembly Plate-Upper Unit AssemblyBlock Diagram Block DiagramGDIBlock DiagramPCL PanelConnection Diagram Connection DiagramGDIConnection DiagramPCL LSURepair Manual Diagram 1250 Connection Diagram GDI Connection DiagramML-1210/ML-1220MPCL Connection DiagramML-1250 PCLSchematic Diagrams Main Circuit Diagram 2/5 Main Circuit Diagram 3/5 Main Circuit Diagram 4/5 Main Circuit Diagram 5/5 PC L Main Circuit Diagram 1/9 PCL Main Circuit Diagram 2/9 PCL Main Circuit Diagram 3/9 PCL Main Circuit Diagram 4/9 PCL MainCircuit Diagram 5/9 PCL Main Circuit Diagram 6/9 PCL Main Circuit Diagram 7/9 PCL Main Circuit Diagram 8/9 PCL Main Circuit Diagram 9/9 Hvps Circuit Diagram 1/2 Hvps Circuit Diagram 2/2 Smps Circuit Diagram No Marking Resistor 1/4W-J 5% Panel Circuit Diagram Page Samsung Electronics Digital Printing CS Group Contents
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ML-1200, ML-1210 specifications

The Samsung ML-1200 is a noteworthy monochrome laser printer designed to deliver impressively sharp and high-quality printouts, making it a popular choice for both home and small office environments. While it boasts a compact design, the ML-1200 does not compromise on performance, offering a variety of features that enhance productivity and ease of use.

One of the most defining characteristics of the ML-1200 is its print speed. Capable of producing up to 12 pages per minute (ppm), it ensures that users can handle their printing tasks quickly and efficiently. The first page out time is a mere 8.5 seconds, allowing users to receive their documents promptly without unnecessary delays.

Resolution is another critical factor in print quality, and the ML-1200 does not disappoint. With a printing resolution of up to 1200 x 1200 dots per inch (dpi), this printer provides crisp text and detailed graphics, making it suitable for various documents ranging from simple text files to more intricate reports and presentations.

Equipped with Samsung's unique ReCP (Rendering Engine for Clean Page) technology, the ML-1200 enhances the clarity of printed text and images. This technology works by improving edge detail and overall print quality, minimizing the chances of blurry or unclear outputs, which is a common issue with lower-tier models.

In terms of connectivity, the Samsung ML-1200 features standard USB 2.0 support, allowing users to connect the printer directly to their computer seamlessly. While it may lack wireless capabilities, this direct connection provides a stable and reliable interface for personal use.

The device offers a standard paper tray capacity of 150 sheets, along with a one-sheet manual feed slot, catering to different media types. The printer supports various paper sizes, including A4, Letter, and Legal, further enhancing its versatility for various printing tasks.

In conclusion, the Samsung ML-1200 is a robust monochrome laser printer that offers a combination of speed, print quality, and usability, making it an ideal choice for individuals and small businesses looking for a reliable printing solution. Its compact size and efficient technologies ensure that it can easily fit into any workspace while delivering outstanding results consistently.
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