Troubleshooting

6.1.3 Horizontal Black Bands

• Description

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

1.Dark or blurry horizontal stripes occur in the printing periodically. (These may occur at regular intervals down the page.)

Check and Cause

 

Solution

 

 

 

1. Bad contacts on the toner cartridge high

1.

Clean all HV terminals on the cartridge and

voltage terminals.

 

 

on the set frame. Ensure all toner or paper

 

 

 

 

dust particles are removed.

2. The rollers in the toner cartridge may be

2.

Clean the right Gear that has relatively

contaminated.

 

 

 

small tooth gap on the OPC.

Charge roller

=

37.8 mm

 

 

Supply roller

=

44.9 mm

 

 

Develop roller =

35.2 mm

 

 

Transfer roller

=

45.3 mm

 

 

 

 

 

3.

If the problem persists replace the toner

 

 

 

 

cartridge.

 

 

 

 

 

6.1.4 Black/White Spot

• Description

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

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

2.White spots occur periodically in the printing.

Check and Cause

Solution

 

 

1. If dark or blurry black spots occur periodi-

1. Print several OPC cleaning Mode Prints

cally, the rollers in the Developer may be

and then run the Self-test 2 or 3 times.

contaminated with foreign matte or paper

 

particles.

 

( Charge roller : 37.8 mm interval

 

OPC drum : 75.5 mm interval)

 

2. If faded areas or voids occur in a black

2. 75.5 mm repetition: Examine the surface of

image at intervals of 75.5 mm, or black

the OPC drum and carefully clean with a

spots occur elsewhere, the OPC drum

soft, lint free cloth. If unsuccessful replace

surface is damaged.

the cartridge.

 

37.8mm repetition: Replace the toner car-

 

tridge

3. If a black image is partially broken, the

3. The transfer roller guarantees 50,000

transfer voltage is abnormal or the

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

transfer roller's life has expired.

replace it.

 

Note. Cleaning the inside of the set to

 

remove excess toner particles or paper

 

dust will reduce the occurrence of this

 

problem..

 

 

6-2Service Manual

Samsung Electronics

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Samsung SCX-4200 manual Horizontal Black Bands, Black/White Spot, Description Digital Printer
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