1、- MIL-C-70475 12 m 7777706 0355253 7 m 1 T 6 a O e MIL-C-7ON5 (AR) O4 APRIL. 85 MILITARY SPECIFICATION: CIRCUIT CARD ASSEMBLY DISPLAY POmR SUPPLY This specification is approved for use by the US Army Armament, Munitions and Chemical Command and is available for use by ail Departments and Agencies of
2、 the Department of Defense, 1. SCOPE 1.1 Scope. This specification establishes the requirements for manufacture and acceptance of the Display Power Supply Circuit Card Assembly: 9355847, used in the Mortar Ballistics Computer (MBC) : M23. Througout this specification this assembly is referenced as “
3、supply“. 2. APPLICABLE DOCUMENTS 2 . 1 Government documents. 2.1.1 Specification and standards. Unless otherwise sDecified, the following specifications and standards of the issue listed in-that issue of-the Department of Defense index of Specifications and Standards (DoDISS) specified in the solici
4、tation form a part of this specification to the extent specifTed herein. SPECIFICATIONS MILXTARY MIL-F-13 92 6 - Fire Control Materiel; General Specification Governing the Manufacture and Inspecti on Maintenance and Disposition of MIL-1-45601 - Inspection Equipment, ACqUiSitiQn, STANDARDS MILITARY M
5、IL -STD- 10 5 - Sampling Procedures and Tables for Inspection by Attributes FSC 1220 Beneficial comments (recommendations, additions, deletions) and any pertfnent data which may be of use in improving this document should be addressed to: Commander, US Army Armament Reeearch and Development Centsr,
6、Atk AMSMC-QA, Dover, New Jersey 07801-5001 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1428) appearing at the end of this document or by letter. / THIS DOCUMENT CONTAINS - PAGES Provided by IHSNot for ResaleNo reproduction or networking permitted without licens
7、e from IHS-,-,- MIL-C-70475 12 m 7977706 0355252 7 h MTL-C-7D4 95 (AR) MIL-STD-10 9 - Quality Assurance Terms and MIL-STD-4 54 - Electronic Equipment, General MIL-STD-1521 - Technical Reviews and Audits for Definitions Requirements for Systems, Equipments, and Computer Programs MIL-STD-45662 - Calib
8、ration System Requirements (Copies of specifications and standards required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting off icer . ) 2.1.2 Other Goverment documents, drawinqs, and publications. The fo
9、llowing other Government documents, drawings, and publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal. DRAWINGS 9355847 - Circuit Card Assembly, 11785850 Computer Set, Ba
10、llistics, Mortar: M23 Display Power Supply PACKAGING DATA SHEETS 9355847 - Packaging of Circuit Card Assembly, Power Supply, Display: 9355847 (Copies of drawings and packaging data sheets required by manufacturers in connection with specific acquisition functions should be obtained from the contract
11、ing activity or as directed by the contracting officer.) 2.2 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification shall take precedence. 3 . REQUIREMENTS 3.1 Item definition. The display power supply ci
12、rcuit card assembly shall provide the Mortar Ballistic Computer (MBC) with display and electroluminescent drive voltages from various battery voltages or from unregulated external prime power. It also supplies control logic for the MBC logic power supply and a RAM standby battery with charging circu
13、itry. are listed in Table I. The connector contacts 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Connecg P1 P1 P1 P1 P1 P1 P1 P1 P2 P2 P2 P2 P2 P2 P2 P2 MIL-C-70475 12 7799906 0355253 O MIL-C-70495 (AR) TABLE Pin Al A2 A3 A4 B1 B2 B3 B4 Al A2 A3
14、 A4 B1 B2 B3 B4 - I. Display power supply circuit card assembly connector contacts . Name Type - O O O I I I I I I I I O O 1 +35v ELHI ELLO MC1200 ELON DSPON* ON* OFF PS+5V +5V SPOS PCRUN* BAT+5V GND GND PSFAULT“ 3 . 2 Perf srmance. 3.2.1 General, The performance of the supply shall be in accordance
15、 with the following requirements. 3.2.1.1 Display on. .connected to P2-BS (GND) and shall turn off when Pl-B2 is The supply shall turn on when Pl-B2 is connected to P2-Al. It shall be considered on when requirement 3.2.1.2 is met. 3.2.1.2 Positive volts. volts DC when referenced to GND. 3.2.1.3 Batt
16、ery volts. 0.6 volts DC when referenced to GND. 3.2.1.4 Output ripple. The +35V output shall have an AC component with a voltage level less than 0.6 volts peak to peak that is at a frequency less than 1 megahertz, Pl-Al shall be +35 plus or minus 2.5 P2-Bl shall be plus 5.4 plus or minus 3.2.1.5 Ove
17、rload/shortcircuit protection. The +35V output shall begin to decrease in voltage when the output current is at least 22 milliamperes and at most 55 milliamperes. When the +35V output is shortcircuited to GND, the output current shall be less than .5 amperes. 3 Provided by IHSNot for ResaleNo reprod
18、uction or networking permitted without license from IHS-,-,-.- ._-_I MIL-C-70475 12 m 7779906 0355254 2 MIL-C-70.495 (AR) 3.2.1.6 Power supply run. The voltage between P2-A$ and-GND shall be .5 plus or minus .5 volts DC when Pi-B3 is connected to GND. After Pl-B3 is disconnected from GND and then P1
19、-B4 is connected to P2-A1, the voltage between P2-B4 and GND shall be 21 plus or minus 11: volts DC. I 3.2.1.7 Electroluminescent panel hiqh. P1-A2 shal be 35 Dlus or minus-15 volts rms when referenced to Pl-A3 after P1-B1 is ionnected to PS-A1 and shall be less than 3 volts rms after 1-Bl is discon
20、necte. 3.2.1.8 Common connector contact continuity. The resistance between GND and P2-B3 shall be lessthan7.5 ohms. 3.2.2 Physical characteristics. The physical characteristics shall be as prescribed by the drawings, specifications, and QAPs. 3.2.3 Reliability. When specified in the contract, a spec
21、ial sample shall be- subjected ta reliability testing. manufacturing- and production techniques empoyed in. the fabrication of the supply shall not degrade the inherent reliability. The inher-ent reliability shall not be less than 131,068 hours Mean Time Between Failures (MTBF). (See 4 and 6) The 3.
22、3 Environmentax. The supply shall meet the requirements specified here.in unie a 5.3 plus or minus .1 volts DC power supply to P2-A1 and P2-A2 both with respect to GND; a 1200 plus or minus 12 Hz square wave generator that has a high level of 4.6 plus or minus -7 volts DC and a low level of .5 plus
23、or minus .5 volts DC to Pl-A4 with respect to GND; a 43.2 kilohm plus or minus 1 percent 1/10 watt resistor in parallei with a .O47 microfarad plus or minus 1 percent 100 volt AC capacitor. Connect the parallel combination between P1-A2 and Pl-A3; and a 21 plus or minus II volts DC power supply to P
24、2-A3 with respect to P2-B2. 4.6.3.1 Display on. Connect Pl-B2 to GND. The supply shall turn on as specified in 3.2.1.1. 4.6.3.2 Positive volts. Turn on the supply while monitoring Pl-Al with a voltmeter. The output response shall be as specified in 3.2,1.2. 9 Provided by IHSNot for ResaleNo reproduc
25、tion or networking permitted without license from IHS-,-,- -u- MIL-C-70475 12 7799906 0355260 MIL-C-70495 (AR) 4.6.3.3 Battery volts. After P2-A3 has been connected to a voltase source, as specified in 4.6.3, for 30 to 45 minutes disconnect thevoltage. to GND. The measured voltage shall be as specif
26、ied in 3.2.1.3. Measure the voltage at P2-Bl with respect 4.6.3.4 Output ripple. Turn on the supply. With an oscilloscope, look at the output ripple at theT+3XV output with respect to GND. The output response shall be as specified in 3.2.1.4. 4.6.3.5 Overload/shortcircuit protection. Conduct this te
27、st by connectinq a variable (O to 10 kilohm) 10 watt resistor in series with a 500 milliamp DC current meter. Connect the variable resistor current meter combination between +35-V and GND. Set the resistor to its maximum resistance and turn on the supply. Slowly decrease the resistance while at the
28、same time noting the current meter reading and the DC voltage level at +35V with respect to GND. The output response shall be as specified in 3.2.1.5. 4.6.3.6 Power supply run. Conduct this test by connecting Pl-B3 to GND while monitoring P2-A4 with a voltmeter. Then disconnect Pl-B3 from GND and co
29、nnect Pl-B4 to+5V. The out response shall be as specified in 3.2.1.6. 4.6.3.7 Electroluminescent pane2 high. Turn on the supply while monitsrina the AC voltacre between P1-A2 and Pl-A3. Connect P1IB1 toT+5V. 3.2.1.7. ?he output resGonse shall be as specified in 4.6.4 Common connector contact continu
30、ity. This test shall be conducted with no external power connected to the supply. Measure with an ohm meter the resistame between GND and P2-B3. The resistance shall be as specified in 3.2.1.8. 4.6.5 Workmanship. The supply shall be subjected to a visual and tactile examination for evidence of fault
31、y workmanship. The supply shall conform to the requirements of 3.6. 4.7 Reliability testinq. The requirement for reliability test approval and the responsibility (Government or contractor) for reliability testing shall be as specified in the contract. The sample for reliability test shall consist of
32、 3 supplies. The samples shall be manufactured in the same manner, using the same materials, equipment, processes, and procedures as will be used in the production of the balance of the contract quantity. All parts and materials, indluding packaging and packing, shall be obtained from the same sourc
33、e of supply as will be used in the production of the balance of the contract quantity. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C- 704 9 5 (AR) 4.7.1 Government testing. When the Government is responsible for conducting reliability tests,
34、the contractor prior to submitting the sample to the Government, shall inspect the sample to assure that it conforms to all requirements of the contract and. submit a record of this inspection with the sample, including certificates of conformance for all materials. 4.7.2 Contractor testinq. When th
35、e contractor is responsible for conducting reliability tests, the sample shall be inspected and tested by the contractor for all the requirements of the contract. The sample and a record of these inspections and tests, including certificates of conformance for all materials, submitted to the Governm
36、ent for approval. The Government reserves the right to witness any or all of the contractors reliability tests and inspections. shall be 5 . PREPARATION FOR DELI-VERY 5.1 Delivery requirements. Handling, packaging, packing, shipping, and marking of the Display Power Supply Logic Circuit Card Assembl
37、y, 9355847 shall be in accordance with Packaging Data Sheet 9355847. the procurement document. The level of protection shall be as specified in 6. NOTES 6.1 Intended use. The display described herein is intended for use in the MBC. See drawing 11785850. 6.2 Orderinq data. Procurement documents shall
38、 specify the following: a. Title, number and date of this specification. b, Provisions for first article testing. c. Provisions for reliability testing. d. Applicable Packaging Data Sheet. e. Applicable levels of pxeservation, packing, and marking (see 5.1). f. Applicable stock numbers. Cus tod ian : Army-AR Preparing activity: Army-AR (Project 1220-A305) 11 - U.6- 0VERN?IEMT PRINTINB OFFXCEf 1985 - 105-03#/21907 -a Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
