Samsung ML-3471ND Especificaciones descargar pdf (Pagina 130)

Service Manual

Adjustment and Troubleshooting

4-62

Samsung Electronics

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

periodically.

• 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

contaminated with foreign

substance 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

abnormal.

1. Poor appearance of the toner

cartridge.

(1)Check the damage to label

and whether different

materials 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

substance or toner are stuck

to the terminal (contact point)

of the toner cartridge.

(2)Check whether the state of

the terminal assembly is

normal.

1. In case of 1 above -

Run OPC Cleaning Mode Print

4-5 times repeatedly to remove.

Especially check foreign

substance 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

voltage and readjust if different.)

1. In case of 1 -

(1)If there is an evidence of

disassembling 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

cartridge is recycled over 2

times.

(2)If toner nearly being expired

are collected to use, it is

judged as the recycled toner

cartridge.

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