DPS photo systems architecture Company confidential PRINTER SUBLIMATION TEGNOLOGY SERVICE SUPPORT (Spanish Branch) VIS Services & SupportMEUSP CONFIDENTIAL

DPS photo systems architectureCompany confidential

PRINTER SUBLIMATION TEGNOLOGY

SERVICE SUPPORT (Spanish Branch)

VIS Services & Support MEUSP CONFIDENTIAL

Objective:

The followings contents try to use the same definition for all efects (key words)

Which will be understand each other


Key word = Obiki (Smearing)

sample

Black

area

Especially Light grayish “back ground”

Thermal head

Printing direction

Smearing symptom

reason


This symptom will be caused due to thermal responce of thermal head from black (high temperature) to white (low temperature) changing.

Paper Direction

Printing Starting



Key word = Skew (skew)

Problems due to the paper

Mechanism, the paper has

A shifting moviment from the left

to right and vice versa

Photo Nº 1

Printing area

Printed paper


Key word = Nodo Mura ( Uniformity of printing density)


One of the SAMPLES

One of the REASONS

Thermal head

Uneven thermal head surface cause Uniformitil level efect, and makes not good constant contact between thermal

head/inksheet/paper and platen roller.


“Noudo Mura” is general word about the un-uniformity of printing density.

Printing direction


Key word = Fuka Mura



REASONSAMPLEWhite area change into of gray

back ground produce un evengray

Thermal head (internal constructions)

data

+ voltage input

virtual resistor

The comun cable, which goes to the comun ground, it is not a perfect conductor, it has a small resistence less than 1 Ω, it is represented above, like a virtual resistor.Therfore a big current will produce a big DDC to the virtual resistor.The voltage adjusment is fixed, then when the current is lower due to a bigger are white then virtual resistor will has low voltage in betwem, when the current is bigger due to gray back ground therfore the voltage in the virtual resistor will be bigger, it means that, for the same voltage input, the total current will be different betwen, gray and white area,.therfore this difference is different gray value betwen.all thermal head area making gray or half thermal head making gray.Look at the attache photo

Comun ground


Key word = Siwa (Wrinkling)


REASON sample

Thermal Head Voltage Adjustment too high



Key word = Kizu ( Scratch on printing surface)

Thermal head

One of the reasonssample

Small roughness on the plate indicated with the circleIn this case, it could be resolverd with a lapping sheet Also this phenomen can be produced by cutter when

the paper pass trought it Dust or another dirty material

It can be resolved rubbing with laping sheet

Possible causes



Key word = Okuri Mura (Banding)


Printer direction

REASON sample

When the paper running or the Ink Shent running they don´t have even movimentThen in both cases appear banding efect,Check the publicated technical note for detailsOn the another hand when the platter roller , or any related roller, they have some defect , appear banding.Gears, torke limiter, ink motor or paper motor can produce bading too if some one has some defect


Key Word = Suji Mura (wide line or stripe pattern in general concept)

Wide line or stripe pattern of printintg density in the paper feeding direction

Any density problem due to paper, ink or themal head missalignment which still is not recognized the reason


Printing


Key Word = Sticking

Strong noise

High room temperature and dark image printing continusly

Due to Ink sheet characterics

Wrong thermal head alignment

Too high voltage voltage for thermal head

In this condition appear sticking

It means that is difficutl remove the paper from the ink sheet

The efect can appear in the following cases



Key word = Drag Line


DRAG LINE EFFECT

The thermal head has to be alineated for the above cases

Frontal View Thermal head

Platten Roller

Axis View

Thermal head

Platten Roller

Thermal Head

Adjustemnt

REASON sample


Key word = Kasure ( un-even of printing uniformity)


sampleREASON

Thermal head No good contact between thermal head heater line an platten roller

Frontal View

Platten Roller

Axis View

Thermal head

Platten Roller

Thermal Head

Adjustemnt


Key word = Niji Mura (Rainbow Stripe)

REASON

sample

The enviroment light is reflected on the photo mainly with very dark areas it.It appear due to Over Coat protection where the light is reflected and appearing Nijin Moura (rain Bow), mainly with very dark images




Key word = Block Nuke (white band)

REASON

sample

data

voltage

virtual resistor

Comun grond

Driver unit

data

Driver unit

To the transitors To the transitors

If the driver unit marked with a circle is broken which is inside of thermal head, then all the pixels related to the driver will be inoperated, terfore will appear a white ban on the photo


Key word = Dot Nuke (White line)


Data CMOS IC

voltage

virtual resistor

Comun grond

Driver unit

data

Driver unit

To the transitors To the transitors

Pixel dead due to Electroestatic discharge

REASON

sample

Dead a heater pixel on thermal head


Key word = Shiro Nuke ( Thermal head scratch)

REASON

sample

White line cause by thermal head damaged

Paper running direction

Surface head damaged



Key word = Iro Zure (Miss registration)


REASON

sample

Miss registration of the printing position with yellow magenta and cyan colorThis effect apperar when appear driving problems with the paper or Ink sheet


Key Word = Tofu mura ( Un uniformity of ink)


REASON

Sample-1

This uniformity is caused by the ink sheet with un-uniformity of printed ink on

inksheet firm.

Sample-2

Documents

DPS photo systems architecture Company confidential PRINTER SUBLIMATION TEGNOLOGY SERVICE SUPPORT (Spanish Branch) VIS Services & SupportMEUSP CONFIDENTIAL