Cooling design of NP4203MF02 UM
Contents
1. a specific application The recommended applications of a device depend on its quality grade as indicated below Customers must check the quality grade of each device before using it in a particular application Standard Computers office equipment communications equipment test and measurement equipment audio and visual equipment home electronic appliances machine tools personal electronic equipment and industrial robots Special Transportation equipment automobiles trains ships etc traffic control systems anti disaster systems anti crime systems safety equipment and medical equipment not specifically designed for life support Specific Aircrafts aerospace equipment submersible repeaters nuclear reactor control systems life support systems or medical equipment for life support etc The quality grade of NEC devices is Standard unless otherwise specified in NEC s Data Sheets or Data Books If customers intend to use NEC devices for applications other than those specified for Standard quality grade they should contact an NEC sales representative in advance Anti radioactive design is not implemented in this product Cooling method CONTENTS Guidelines on allowable maximum temperature of each component in the PDP module Heat radiation design for forced air cooling nrzennsennnnnnnnnnnnnnennnnnnennnnnnnnnnnnan nennen nennen nennen Design of alr TloW route ai allen High temperature componen2. not supply a voltage higher than that specified to this product This can damage the product and may cause a fire 3 Do not use this product in locations where the humidity is extremely high where it may be splashed with water or where it is surrounded by flammable materials Do not install or use the product in a location that does not satisfy the specified environmental conditions This can damage the product and may cause a fire 4 If a foreign substance such as water metal or liquid gets inside the product immediately turn off the power Continuing to use the product as it is may cause fire or electric shock 5 If the product emits smoke an abnormal smell or makes an abnormal sound immediately turn off the power If nothing is displayed or if the display goes out during use immediately turn off the power Continuing to use the product as it is may cause fire or electric shock 6 Do not disconnect or connect the connector while power to the product is on It takes some time for the voltage to drop to a sufficiently low level after the power has been turned off Confirm that the voltage has dropped to a safe level before disconnecting or connecting the connector Otherwise this may cause fire electric shock or malfunctioning S Do not pull out or insert the power cable from to an outlet with wet hands Doing so may cause electric shock Do not damage or modify the power cable Doing so may cause fire or electric shock If the
3. power cable is damaged or if the connector is loose do not use the product otherwise this can lead to fire or electric shock CHE 10 If the power connector or the connector of the power cable becomes dirty or dusty wipe it with a dry cloth Otherwise this can lead to fire 13 Caution 1 2 3 10 14 Do not place this product in a location that is subject to heavy vibration or on an unstable surface such as an inclined surface The product may fall off or fall over causing injuries When moving the product be sure to turn off the power and disconnect all the cables While moving the product watch your step The product may be dropped or fall leading to injuries or electric shock Before disconnecting cables from the product be sure to turn off the power Be sure to hold the connector when disconnecting cables Pulling a cable with excessive force may cause the core of the cable to be exposed or break the cable and this can lead to fire or electric shock This product should be moved by two or more persons If one person attempts to carry this product alone he she may be injured This product contains glass The glass may break causing injuries if shock vibration heat or distortion is applied to the product The temperature of the glass surface of the display may rise to 50 C or more depending on the conditions of use If you touch the glass inadvertently you may be burned Do not poke or strike the gla
4. NEC User s Manual Cooling design of NP4203MF02 Document No EA0487EJ1VOUMO0 1st edition Date Published November 1999 P NEC Corporation 1999 Printed in Japan No part of this document may be copied or reproduced in any form or by any means without the prior written consent of NEC Corporation NEC Corporation assumes no responsibility for any errors which may appear in this document NEC Corporation does not assume any liability for infringement of patents Copyrights or other intellectual property rights of third parties by or arising from use of a device described herein or any other liability arising from use of such device No license either express implied or otherwise is granted under any patents copyrights or other intellectual property rights of NEC Corporation or others While NEC Corporation has been making continuous effort to enhance the reliability of its electronic components the possibility of defects cannot be eliminated entirely To minimize risks of damage or injury to persons or property arising from a defect in an NEC electronic components customers must incorporate sufficient safety measures in its design such as redundancy fire containment and anti failure features NEC devices are classified into the following three quality grades Standard Special and Specific The Specific quality grade applies only to devices developed based on a customer designated quality assurance program for
5. arting to design your system 15 6 3 Cautions on Use 1 na kW N Because this product uses a high voltage connecting or disconnecting the connectors while power is supplied to the product may cause malfunctioning Never connect or disconnect the connectors while the power is on Immediately after power has been turned off a residual voltage remains in the product Be sure to confirm that the voltage has dropped to a sufficiently low level Watching the display for a long time can tire the eyes Take a break at appropriate intervals Do not cover or wrap the product with a cloth or other covering while power is supplied to the product Before turning on power to the product check the wiring of the product and confirm that the supply voltage is within the rated voltage range If the wiring is wrong or if a voltage outside the rated range is applied the product may malfunction or be damaged Do not store this product in a location where temperature and humidity are high This may cause the product to malfunction Because this product uses a discharge phenomenon it may take time to light operation may be delayed when the product is used after it has been stored for a long time In this case it is recommended to light all cells for about 2 hours aging If the glass surface of the display becomes dirty wipe it with a soft cloth moistened with a neutral detergent Do not use acidic or alkaline liquids or organic solvents This p
6. e 4 Data electrode driver Surface of the aluminum plate Surface of black IC molding neatsinkordata electrode driver material of scan electrode driver left center and right parts Generally when the air flows from bottom to top the temperature of the top side data drivers are higher than the temperature of the bottom side drivers In this case it is recommended to measure the temperatures of at least the top 3 drivers upper right upper middle and upper left When the temperature is measured with a uniform display pattern like a full white temperature difference of each driver is very small because of same driving condition However when uses other display pattern like a color bar temperature of each driver is different therefore when measure the temperature it is recommended to use a uniform display pattern like a full white 12 6 General cautions 6 1 Warnings and Connectors Warning Indicates a hazard that can lead to death or injury if the warning is ignored and the product is handled incorrectly Caution Indicates a hazard that can lead to injury or damage to property if the caution is ignored and the product is handled incorrectly Warning 1 This product uses a high voltage 420 V MAX Do not touch the circuitry of this product with your hands when power is supplied to the product or immediately after turning off the power Be sure to confirm that the voltage has dropped to a sufficiently low level 2 Do
7. ed Temperature design flow chart 4 Design of air flow route It is necessary to create a design where the cooling air can cool all components The power supply in particular generates a lot of heat Therefore it is important to avoid air warmed up by the power supply affecting any other components in the module Figure 1 shows an example of an air flow route design Figure 1 Example of air flow route design 5 High temperature components As shown in Figure 1 air normally flow from bottom to top In this case the highest temperature components are shown in figure 2 to 4 for reference Of course the temperature of each component varies according to the cooling air flow conditions When the cooling conditions are not uniform the temperature of other components may become high Therefore it is recommended to measure the actual temperature of components in the final assembly Figure 2 Common electrode driving module Surface of top air core coil Heat sink surface of PH41 MOS FET power module On board DC DC converter 10 On board DC DC converter On board DC DC converter On board DC DC converter Figure 3 Scan electrode driving module Heat sink surface of PH44 MOS FET driver module On board DC DC converter On board DC DC converter Heat sink surface of PH42 MOS FET driver module 11 Figur
8. evaluate the system and environment This product uses high voltage switching and a high speed clock A system using this product should be designed so that it does not affect the other systems and should be thoroughly evaluated This product has a glass display surface Design your system so that excessive shock and load are not applied to the glass Exercise care that the vent at the corner of the glass panel is not damaged If the glass panel or vent is damaged the product is inoperable There are some exposed components on the rear panel of this product Touching these components may cause an electric shock This product uses a high voltage Design your system so that any residual voltage in this product is dissipated quickly when power is turned off observing the specifications This product uses heat emitting components Take the heat emitted by these components into consideration when designing your system If the product is used outside the specified temperature range it may malfunction This product uses a high voltage and because of its compact design components are densely mounted on the circuit boards If dust collects on these components it can cause short circuiting between the pins of the components and moisture can cause the insulation between the components to break down causing the product to malfunction Regulations and standards on safety and electromagnetic interference differ depending on the country Design your system in comp
9. liance with the regulations and standards of the country for which your system is intended To obtain approval under certain safety standards such as UL and EN a filter that passes a shock test must be fitted over the glass surface of the finished product In addition it must be confirmed that the level of UV emissions is within the range specified by such standards If this product is used as a display board to display a static image image burn in occurs This means that the luminance of areas of the display that remain lit for a long time drops compared with the luminance of areas that are lit for a shorter time causing uneven luminance across the display The degree to which this occurs is in proportion to the luminance at which the display is used To prevent this phenomenon therefore avoid static images as much as possible and design your system so that it is used at a low luminance by setting PLE to the maximum level Within the guarantee period general faults that occur due to defects in components such as ICs will be rectified by NEC without charge However faults due to burn in are not included Repairs due to the other faults may be charged for depending on responsibility for the faults This product is designed to NEC s Standard quality grade If you wish to use the product for applications outside the scope of the Standard grade be sure to consult NEC in advance to assess the technological feasibility before st
10. olytic capacitor more than 8mm dia lessthan 85 C surface Display panel driver IC lessthan 80 C surface Power transistor Diode less than 100 C surface MOS FET power module with aluminum heat sink less than 100 C surface of heat sink Air core coil lessthan 100 C surface Other semiconductors IC Photo coupler etc lessthan 70 C surface In order to obtain better reliability lower temperatures are recommended wherever possible 3 Heat radiation design for forced air cooling The required air flow rate and the power of the cooling fan depend strongly on the structure of the cabinet and heat generated by all the equipment color PDP module power supply analog processing circuits etc in the cabinet Therefore the cooling ability of the fans can not be specified without knowing the cabinet structure and the end of heat generation of the equipment The final cooling design should be fixed only after measuring of the actual temperature of the components in the PDP module with thermometers Cooling fans emit an audible noise This noise is sometimes regarded as a problem In order to reduce this noise it is recommended to place dampers between the fan and its mountings It is also effective to use larger fans running at a lower speed Determine temperature conditions Air flow route design Selection of cooling fan Temperature measurement Are temperature conditions satisfi
11. roduct is made from various materials such as glass metal and plastic When discarding it be sure to contact a professional waste disposal operator 6 4 Repair and Maintenance Because this product combines the display panel and driver circuits in a single module it cannot be repaired or maintained at users office or plant Arrangements for maintenance and repair will be determined later 6 5 Others 1 2 16 If your system requires the user to observe any particular precautions in addition to the above warnings and cautions include such caution and warning statements in the manual for your system If you have any questions concerning design such as on housing storage or operating environment consult NEC in advance
12. ss surface of the display with a hard object The glass may break or be scratched If the glass breaks you may be injured If the glass surface of the display breaks or is scratched do not touch the broken pieces or the scratches with bare hands You may be injured Do not place an object on the glass surface of the display The glass may break or be scratched 6 2 1 10 11 12 13 Cautions on Design This product may be damaged if it is subject to excessive stresses such as excessive voltage current or temperature The absolute maximum ratings specify the limits of these stresses and system design must ensure that none of the absolute maximum ratings are exceeded The recommended operating conditions are conditions in which the normal operation of this product is guaranteed All the rated values of the electrical specifications are guaranteed within these conditions Always use the product within the range of the recommended operating conditions Otherwise the reliability of the product may be degraded Use of the product with a combination of parameters conditions or logic not specified in the specifications of this product is not guaranteed If intending to use the product in such a way be sure to consult NEC in advance This product emits near infrared rays 800 to 1000 nm that may cause the remote controllers of other electric products to malfunction To avoid this use an infrared absorption filter and thoroughly
13. tisS unnsennssnnnnnnnnnnnnnnennnnnnnnnnnnnnnnnnnnnnnnnnnnennnnnnnennennnenneennnenneen namen nenn General cautions Generally a color PDP module is assembled in a cabinet together with a power supply analog video signal processing circuits and other circuits The features of the color PDP are a large screen size and slim profile In order to take advantage or these features normally all the above equipment needs to be installed in a compact cabinet As a result the temperature inside the cabinet can become very high Therefore a color PDP needs an effective cooling system to radiate the generated heat This document describe guidelines for the allowable temperature of components in the NP4203MF02 42 inch color PDP module and an example of a forced air cooling design 1 Cooling method The selection of a cooling method should take into account the operating temperature range and airflow conditions of the color PDP module When the module is installed in a narrow space the ambient temperature around the module is increased by heat generated by the module and other equipment In this case forced air cooling is essential 2 Guidelines on allowable maximum temperature of each component in the PDP module e Resistors winding metal oxide film carbon film lessthan 90 C soldering parts of lead wires e Ceramic capacitors lessthan 85 C surface Electrolytic capacitor less than 8mm dia lessthan 80 C surface Electr
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