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

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Presentation on theme: "DPS photo systems architecture Company confidential PRINTER SUBLIMATION TEGNOLOGY SERVICE SUPPORT (Spanish Branch) VIS Services & SupportMEUSP CONFIDENTIAL."— Presentation transcript:

1 DPS photo systems architecture Company confidential PRINTER SUBLIMATION TEGNOLOGY SERVICE SUPPORT (Spanish Branch) VIS Services & SupportMEUSP CONFIDENTIAL Objective: The followings contents try to use the same definition for all efects (key words) Which will be understand each other

2 DPS photo systems architecture Company confidential Key word = Obiki (Smearing) sample Black area Especially Light grayish “back ground” Thermal head Printing direction Smearing symptom reason SERVICE SUPPORT (Spanish Branch) 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 VIS Services & Support MEUSP CONFIDENTIAL

3 DPS photo systems architecture Company confidential 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

4 DPS photo systems architecture Company confidential Key word = Nodo Mura ( Uniformity of printing density) VIS Services & SupportMEUSP CONFIDENTIAL 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. SERVICE SUPPORT (Spanish Branch) “Noudo Mura” is general word about the un-uniformity of printing density. Printing direction

5 DPS photo systems architecture Company confidential Key word = Fuka Mura VIS Services & SupportMEUSP CONFIDENTIAL SERVICE SUPPORT (Spanish Branch) REASON SAMPLE White 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

6 DPS photo systems architecture Company confidential Key word = Siwa (Wrinkling) SERVICE SUPPORT (Spanish Branch) REASON sample Thermal Head Voltage Adjustment too high VIS Services & SupportMEUSP CONFIDENTIAL

7 DPS photo systems architecture Company confidential Key word = Kizu ( Scratch on printing surface) Thermal head One of the reasons sample  Small roughness on the plate indicated with the circle In 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 VIS Services & SupportMEUSP CONFIDENTIAL

8 DPS photo systems architecture Company confidential Key word = Okuri Mura (Banding) VIS Services & SupportMEUSP CONFIDENTIAL Printer direction REASON sample  When the paper running or the Ink Shent running they don´t have even moviment Then in both cases appear banding efect, Check the publicated technical note for details  On 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

9 DPS photo systems architecture Company confidential 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 VIS Services & SupportMEUSP CONFIDENTIAL Printing

10 DPS photo systems architecture Company confidential 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 VIS Services & SupportMEUSP CONFIDENTIAL

11 DPS photo systems architecture Company confidential Key word = Drag Line VIS Services & SupportMEUSP CONFIDENTIAL 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

12 DPS photo systems architecture Company confidential Key word = Kasure ( un-even of printing uniformity) VIS Services & SupportMEUSP CONFIDENTIAL sample REASON 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

13 DPS photo systems architecture Company confidential 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 VIS Services & SupportMEUSP CONFIDENTIAL

14 DPS photo systems architecture Company confidential VIS Services & SupportMEUSP CONFIDENTIAL Key word = Block Nuke (white band) REASON sample data voltage virtual resistor Comun grond Driver unit data Driver unit 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

15 DPS photo systems architecture Company confidential Key word = Dot Nuke (White line) VIS Services & SupportMEUSP CONFIDENTIAL Data CMOS IC voltage virtual resistor Comun grond Driver unit data Driver unit To the transitors Pixel dead due to Electroestatic discharge REASON sample Dead a heater pixel on thermal head

16 DPS photo systems architecture Company confidential Key word = Shiro Nuke ( Thermal head scratch) REASON sample White line cause by thermal head damaged Paper running direction Surface head damaged VIS Services & SupportMEUSP CONFIDENTIAL

17 DPS photo systems architecture Company confidential Key word = Iro Zure (Miss registration) VIS Services & SupportMEUSP CONFIDENTIAL REASON sample Miss registration of the printing position with yellow magenta and cyan color This effect apperar when appear driving problems with the paper or Ink sheet

18 DPS photo systems architecture Company confidential Key Word = Tofu mura ( Un uniformity of ink) VIS Services & SupportMEUSP CONFIDENTIAL REASON Sample-1 This uniformity is caused by the ink sheet with un-uniformity of printed ink on inksheet firm. Sample-2


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