Troubleshooting

4-2-3 Horizontal Black Band

1. Dark or blurry horizontal stripes occur in the printing periodically.

• Description

(They may not occur periodically.)

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Check and Cause

 

Solution

 

 

 

1. Bad contacts of the voltage terminals to

1.

Clean each voltage terminal of the Charge,

developer.

 

 

 

Supply, Develop and Transfer roller.

 

 

 

 

(remove the toner particles and paper par-

 

 

 

 

ticles)

2. The rollers of developer may be stained.

2.

Clean the right Gear that has relatively

Charge roller

=

38.5mm

 

small gap of the teeth in the OPC.

Supply roller

=

51mm

 

 

Develop roller =

50mm

 

 

Transfer roller

=

56.8mm

 

 

 

 

 

3.

If the malfunction persists, replace the

 

 

 

 

developer.

 

 

 

 

 

4-2-4 Black/White Spot

• Description

1. Dark or blurry black spots occur periodically in the printing.

2. White spots occur periodically in the printing.

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Check and Cause

 

Solution

 

 

 

1. If dark or blurry black spots occur periodi-

1.

Run OPC cleaning Mode Print and run the

cally, the rollers in the Developer may be

 

Self-test 2 or 3 times.

contaminated with foreign matte or paper

 

 

particles.

 

 

( Charge roller : 38.5 mm interval

 

 

OPC drum : 96 mm interval)

 

 

2. If faded areas or voids occur in a black

2.

In case of 96 mm interval unremovable in 1,

image at intervals of 96 mm, or black

 

cleanly remove foreign substances stuck on

spots occur elsewhere, the OPC drum

 

the OPC location equivalent to black spots

surface is damaged.

 

and white spots with a dry duster.

3. If a black image is partially broken, the

3.

The transfer roller guarantees 125,000

transfer voltage is abnormal or the trans-

 

sheets printing. If the roller's life is expired,

fer roller's life has expired.

 

replace it.

 

4.

In case of 38.5 mm interval unremovable in

 

 

1, take measures as to replace the develop-

 

 

er cartridge and try to print out.

 

5.

Clean the inside of the set against the paper

 

 

particles and foreign matter in order not to

 

 

cause the trouble.

 

 

 

Samsung Electronics

4-7

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Samsung ML-1651N, ML-1650 specifications Horizontal Black Band, Black/White Spot

ML-1650, ML-1651N specifications

The Samsung ML-1651N and ML-1650 are reliable monochrome laser printers designed for small to medium-sized businesses and home offices. These printers offer a blend of performance, efficiency, and affordability, making them suitable for various printing needs.

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In terms of print quality, both printers deliver sharp, clear black text and detailed graphics, thanks to a print resolution of up to 1200 x 1200 dpi. This high resolution is essential for producing professional-looking documents, which is crucial in a business environment.

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