Samsung ML-2552W Especificaciones descargar pdf (Pagina 113)

7-22

Troubleshooting

Samsung Electronics

Service Manual

Fault Signs Cause & Check Solution

White Black spot

Recycled product

• Light or dark black

dots on the image

occur periodically.

• White spots occur

in the image period-

ically.

• Poor appearance of

the toner cartridge.

• Unclean and rough

printouts.

• Bad background in

the image.

1. If light or dark periodical black

dots occur, this is because the

toner cartridge rollers are cont-

aminated with foreign sub-

stance or paper particles.

(1)38mm interval : Charged

roller

(2)95mm interval : OPC cycle

2. If white spots occur in a black

image at intervals of 95mm, or

black spots occur elsewhere,

the OPC drum is damaged or

foreign substance is stuck to

the surface.

3. If a black and white or graphic

image is partially broken at

irregular intervals, the transfer

roller's life has been expired or

the transfer voltage is abnor-

mal.

1. Poor appearance of the toner

cartridge.

(1)Check the damage to label

and whether different materi-

als are used.

(2)Check the appearance of

parts of the toner cartridge,

such as frame, hopper.

2. Unclean and rough printouts.

(1)Check whether foreign sub-

stance or toner are stuck to

the terminal (contact point) of

the toner cartridge.

(2)Check whether the state of

the terminal assembly is nor-

mal.

1. In case of 1 above -

Run OPC Cleaning Mode Print

4-5 times repeatedly to remove.

Especially check foreign sub-

stance on the OPC surface, then

remove them with a clean gauze

moistened with IPA(Isopropyl

Alcohol) not to damage OPC if

necessary.

Never use usual alcohol.

2. In case of 2

If they are not disappeared by

running OPC Cleaning Mode

Print 4-5 times.

:

at intervals of 38mm

- Replace

the toner cartridge.

: at intervals of 95mm - Remove

foreign substance.

: Broken image - Replace the

toner cartridge according to

carelessness.

3. In case of 3 - Exchange the

transfer roller because the life of

the transfer roller in use has been

expired. (Check the transfer volt-

age and readjust if different.)

1. In case of 1 -

(1)If there is an evidence of disas-

sembling the toner cartridge.

(2)If materials other than normal

parts of the toner cartridge are

added or substituted.

2. In case of 2 - If there are any

abnormals in connection with the

situation of 1.

(1)It occurs when the toner car-

tridge is recycled over 2 times.

(2)If toner nearly being expired

are collected to use, it is

judged as the recycled toner

cartridge.

Digital Printer

Digital Printer

Digital Printer

Digital Printer

Digital Printer

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