Disclosure to Promote the Right To Information

Transcription

1 इ टरन ट म नक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. ज न1 क अ+धक र, ज 1 क अ+धक र Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live प0र 1 क छ ड न' 5 तरफ Jawaharlal Nehru Step Out From the Old to the New IS (1980): Deflection Coil Units Used with TV Picture Tubes, Part 4: Type DCU2S for 310 mm, and 340 mm TV Picture Tubes [LITD 5: Semiconductor and Other Electronic Components and Devices]! न $ एक न' भ रत क +नमण Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge! न एक ऐस खज न > ज कभ च0र य नहB ज सकत ह ह Bhartṛhari Nītiśatakam Knowledge is such a treasure which cannot be stolen

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4 UDC : * ( First Reprint AUGUST 1983 ) Is. Bwk qs$y ibafflrk EiP (Part IV) 1980 (s7 1 I Indian Standard SPECIFICATION FOR DEFLECTION COIL UP USED W~1Tll TV PICTURE TUBES PART IV TYPE DCUZS FOR 310 mm AND 340 mm PICTURE TUBES 1. General This standard shall be read in conjunction with IS : 9187 (Part I)1 979 deflection coil units used with TV picture tubes: Part I General requirements and tests I. Type Designation This deflection coil unit shall be designated as Deflection XU2S. DCU means deflection coil unit, 2 represents TV picture tubes of sizes 310 mm and 340 mm, and S denotes solid state circuitry. 2. Application This deflection coil unit Type DCUZS is meant for use with a 310 n 1 IO to 114 monochrome picture tube in conjunction with : a) line output transformer used with TV picture tubes, type LCT2S for 310 mm and 34 tubes [see Indian Standard Specification for line output transformer used with _ Type LOT2S for 310 mm 340 mm TV picture tubes (under preparation)]; and b) linearity control unit used with TV picture tubes, type LCU2S for 310 mm and 34 tubes [see Indian Standard Specification for linearity control unit used with T Types LCU2S for 310 mm and 340 mm TV picture tubes (under preparation)]. 3. Description The saddleshaped line deflection coils shall be mounted on moulc the deflection centre shall be well within the conical part of the picture tube. The fiek shall be wound on a ferrite yoke ring which is flarred so that the frame and line deflection The relative positions of the frame and line deflection coils are so adjusted that their fl angle to each other. The unit shall meet the selfextinguishing and nondripping requir Standard safety requirements for mains operated electronic and related apparatus fo similar general use (under preparation). 4. Outline and Dimensions The outline and the dimensions shall be according tc Magnet position (1) and (2) as shown above. FIG. 1 OUTLINE AND DIMENSIONS Adopted 30 January 1980 I Q August 1980, ISI I Or : INDIAN STANDARDS INSTITUTION MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI

5 IS : 9187 (Part IV) Mounting The deflection unit shall be mounted as far forward as possible on the neck of the picture tube, so that it touches fhe cone. To orient the raster correctly, the unit may be rotated by hand on the neck of the picture tube with which it shall make a slip fit. A screwtightened clamping ring shall permit it to be locked both axially and radially, in the desired position. 6. General Specifications a) Picture tube types 310 mm and 340 mm Neck diameter 20 mm nominal Deflection angle 110 to 114 b) Outline and dimensions See Fig. 1 Pins for connection Solderable c) Category temperature Minimum 10 C Maximum 70 C dj?&ximum winding temperature 100 c 7, E~er;.ts~cal Specifications The values shall be measured on ambient temperature of 25 C : :!i i.3, deflection coils, parallel connected (see Fig. 2A) connecting terminals 3 and 4. l0ductance 255 PH & 5 percent Resistance 0.56 B f 10 percent!j; Field deflection coils, parallel connected (see Fig. 2B) connecting terminals I and 6. Inductance 77 mh i 10 percent DC resistance 2.7 Q i_ 35 percent c) Sensitivity Deflection current edge to edge Measured with EHT 11 kv and reference picture tube In line direction In frame direction 5.02A peak to peak l1 A peak ta peak d) Raster distortion (measured without correction magnets) Barrel distortion in the corners Pin cushion distortion and trapezium distortion None See Fig. 3 I 6 2A 2B FIG. 2 COIL SCHEMATIC CONNECTIONS 2

6 IS : 9187 (Part IV) Geometric Distortion The geometric distortion shall be in accordance with Fig. 3. I I +x EDGE CF PHOSPHOfi SCREEN I t _l zt4 Fy : $4 Jy Gy: : Hy : 0 $2 Fx : 0 Gx: $4 Jx:O 2 4 Hx : 0 +2 FIG. 3 GEOMETRIC DISTORTION 9. Correction Facility 9.1 For Centring The beam centring magnets shall have an area of adjustment from less than 5 mm to greater than 45 mm diameter of the electron beam. 9.2 Pin Cushion Distortion The correction magnets shall be provided for correction of pin cushion distortion. 9.3 For Corner MagnetsTo correct the corners Of the raster, small plastic bounded ferrite magnets may be used, if required. Facility shall be provided for mounting these magnets on the periphery of the moulding. 10. Marking Se? 6 of IS: 9187 (Part I) Materials, Construction and Workmanship See 5 ot IS: 9187 (Part I) Classification of Tests See 7.2 of IS: 9187 (Part I) General Conditions for Tests See 7.1 of IS: 9187 (Part I)1979, 12.2 The test schedule and the requirements shall be in accordance with Table 1. SI No. Test (1) (2) TABLE 1 TEST SCHEDULE Clause Ref of IS: 9187 (Part I)1979 (3) AND REQUIREMENTS Conditiori of Test Requirements (4) ( i) All Samples 4 Visual examination b) Dimensions 4 Continuity of winding d) Operating current 4 DC resistance The workmanship, condition and finish shall be satisfactory. The rnerking shall be legible The dimensions shall conform to the dimensions shown in Fig. 1 The operating current shall be in accordance with 7(c) The dc resistance shall be in accordance 3

7 IS : 9187 (Part IV) 1980 TABLE 1 TEST SCHEDULE AND REQUIREMENTSContd Nsd. Test Clause Ref of IS: 9187 (Part I)1979 Condition of Test Requirements (1) (2) (3) (4) ( f) Inductance The inductance shall be in accord ante g) Voltage proof h) Insulation resistance flashover at 1.5 kv ac MQ, Min at 500V dc of j) Deflection sensitivity (with accelerating voltage) The peak to peak current flowing through the line deflection coils aswell asthe frame deflection coils shall be in accordance with 7(c) k) Distortion (pin cushion, barrel effect and perpendicularity/ trapezium) The picture outline distortion shall be as shown in Fig. 3 ii) First Group a) Soldering 2) Continuity of winding b) Robustness of terminations 2) Continuity of winding c) Bump bumps for 10 g 2) Continuity of winding d) Vibration 7.9 2) Continuity of winding 3) DC resistance to 55H2, duration 6~hours There shall he no damage Each winding shali be continuous DC resistance shall be within the specified limits 4) Inductance Insulation resistance ) Voltageproof MQ. Min at 500V dc flashover at I.5 kv ac or e) Shock y gduzstion 2) Continuity of winding 3) DC resistance DC resistance shall be in accordance 4) Inductance wi!h 7(a) and 7(b) 6) Insulation resistance ) Voltageproof MQ, Min si 500V dc flashover at l5 kv ac or (Continued) 4

8 TABLE 1 TEST SCHEDULE AND REQUIREMENTS Contd IS : 9187 (Part IV) _ SI NO Test Clause Ref of IS: 9187 ( Part I) 1979 Requirements (1) (2) (3) f) Acce!eration ( L isual examination Continuity of winding Each winding shall be continuous DC resistance DC resistance shall be in accordance 4) Inductance 7.4.4!nsulation resis?ance MQ, lll/nat 5OOV dc 6) Voltage proof There shbll be no breakdown or flashover at 2 kv ac g) Climatic ) Dry heat At max category temp (70 C or IOO C) Insulation resistance MR at 500V dc Note The dry heat test shall be carrred out at maximum temperature 7O. C by!oading the deflection co11 units with the appropriate current and x:oltage or at n:?ximunt temperature on no!oad Visual examination Insulation resistance M:? J: 5OOV dc 2) Damp heat (accelerated) first cycle Visual examination _ Insulation resistance f 000 MC at 500V dc 3) Cold c Visual examination Continuityofwinding Each winding shall be continuous Voltageproof or flashover at 1.5 kv ac 4) Air pressure (low) kpa There shall be no breakcown or failure of mechanical deterioration Damp heat (accelerated) cycle Visual examination remaining There shalt be no damage Continuity of winding Each winding shall be continuous DC resistance DC resistance shall be in accordance Inductance with 7(e) and 7(b) Insulation Voltageproof resistance MQ. Min at 500V dc or flashover at 15 kv ac iii) Second Group a) Damp heat (longterm exposure) 7.11 (Continued)

9 TABLE 1 TEST SCHEDULE AND flequirenents Contd SI No. Test Clause Ref Condition of IS: 9187 of Test (Part I]1979 Requirements (1) 13) [>3 ( 2) Continuity of windin(! Each winding rhsll be continuous 3) DC resistanca DC resistance shall be in accordance 4) rnduc!ance Insulation resistance MR. Min at 5OOV dc Voltageproof flashover at 1.5 kv ac or iv) Third Group a) Endurance (electrical) ) 2) 3) Visual examination Continuity of winding DC resistance DCresistance shall be in accordance 4) tnductance Inductance with 7(a) shall be in accordance and 7(b) Insulation resistance MQ, Min at 500V dc 6) Voltageproof flashover at l5 kv ac or b) Flammability 7.17 Burning particles shall not detach from the component v) Fourth Group a) Mould growth 2) Continuity of winding vi) Fifth Group a) Temperature rise vii) Sixth Group a) Salt Mist 2) Continuity otwinding The temperature rise shall not exceed 30 C