Manual / Guide
NAVSHIPS 94971 PP-3494A UG teletype loop supply
NAVSHIPS 94971, PP-3494A/UG teletype loop supply (48 or 120 V DC, magnetic-amplifier regulated)
Manual / Guide
NAVSHIPS 94971, PP-3494A/UG teletype loop supply (48 or 120 V DC, magnetic-amplifier regulated)
NAVSHIPS 94971 (Non-Re gistered ) TECHNICAL MANUAL for POWER SUPPLY PP-3494A/UG AEROTRONIC CONTROLS COMPANY CHICAGO, ILLINOIS DEPARTMENT OF THE NAVY | BUREAU OF SHIPSypy, “oy Bey AN 6p a) 4 ae = = = * Contract NObsr 89233 (FBM) Approved by BuShips: 30 August 1963 Contract NObsr-89360 (FBM ) FRONT MATTER NAVSHIPS 94971 TABLE OF CONTENTS SECTION 1 - GENERAL INFORMATION Paragraph 1- Functional Description ........ 1- SECTION 2 - INSTALLATION Site Selection ..... we ew ee eh we we Terminal Board Connections ....... . Voltage Adjustment ...... a ee NW W LW BR rR WN SECTION 3 - OPERATION 3-1. Operating Procedures ..-+...+--2+2es SECTION 4 - PRINCIPLES OF OPERATION 4-1. Functional Description SECTION 5 - TROUBLESHOOTING 5-l. General ........ cee ew wt ww tt ww SECTION 6 - REPAIR 6-1. Failure Report ........... 6-2, Adjustments . ee ee he 6-3. Repair... ... 2.2.2.2. 20 0 eee eee SECTION 7 - PARTS LIST 7-1. Introduction .......... 7-2. Maintenance Parts List. ........-.+6-. 7-3. List of Manufacturers. ........e. LIST OF ILLUSTRATIONS SECTION 1 - GENERAL INFORMATION Figure 1-1. Power Supply PP-3494A/UG.......... 1-2. Power Supply PP-3494A/UG, System Diagram ORIGINAL l. 2. Reference Data ...... cee ee ee te Power Requirements ........... soe Contents Page nna t ee — = “JIo~J ~) i] y-S— — Page 1-1 1-2 iv Contents NAVSHIPS 94971 LIST OF ILLUSTRATIONS (Cont'd) SECTION 2 - INSTALLATION FRONT MATTER Figure Page 2-1. Power Supply PP-3494A/UG, Outline Drawing .......... 2-0 2-2. Terminal Board Connections 48-Volt Output. .... ce te ee 2-1 2-3. Terminal Board Connections 120-Volt Output ........... 2-1 SECTION 3 - OPERATION 3-1. Power Supply PP-3494A/UG, Front View ........... 3-0 SECTION 6 - REPAIR 6-1. Power Supply PP-3494A/UG, Top View .......... cee 6-2 6-2. Power Supply PP-3494A/UG, Schematic Diagram. .... Lee 6-3 6-3. Power Supply PP-3494A/UG, Wiring Diagram ........-.. 6-4 LIST OF TABLES SECTION 7 - PARTS LIST - Table Page 7-1. Maintenance Parts List... . 2... 2. 1 ee ee ew he ee we es 7-2 SECTION 7 - PARTS LIST 7-2. List of Manufacturers. ..........64.-. 7-3 ORIGINAL PP-3494A/UG GENERAL INFORMATION Figure 1-1. ORIGINAL NAVSHIPS 94971 Power Supply, PP-3494A/UG Paragraph 1-1 SECTION I GENERAL INFORMATION 1-1. FUNCTIONAL DESCRIPTION. Power Supply PP-3494A/UG is a unit designed to produce either 120 or 48 volts d.c. when operated from a 120- volt a.c. 50-o0r60-cycle supply. The d.c. voltage output is regulated and will remain constant within plus or minus 5% with an a.c. voltage input change of plus or minus 10% at a load of 0.4 ampere. Power Supply PP-3494A/Ug is in- tended to be used as ad.c. supply for the operation of teletypewriters, radio adapters, and associated equipments. Figure 1-2 shows Power Supply PP-3494A/UG used in a typical radio teletype system. NAVSHIPS 94971 PP-3494A/UG GENERAL INFORMATION No vacuum tubes are used and the unit requires no operation adjustments. The circuit comprises a power transformer, a silicon bridge rectifier, an inductance-capacitance filter, and ad.c. voltage regulator consisting of a magnetic amplifier and Zener diodes. Fuses are provided for overload and short circuit protection and a pilot light indicates when the power is on. 1-2. REFERENCE DATA. a. Navy Type: PP-3494A/UG Commercial Type: Power Supply 9100 P-07 Power Supply b. Contract: NObsr-89233 Ce Contractor: Aerotronic Controls Company, Chicago, Ill. —re INA IN [. =", Gee iii @) mm L = I CONVERTER ee Gee gaz! COMPARATOR GROUP eOe ee ° ®© © ITTY PANEL RECEIVER 8888833 $9990 00 ge! 0000000 OUTPUT POWER RECEIVER lZ0VOR 48VDC+5% @ 6] SwiTcHING * 3} CONTROL INPUT POWER _—s 120VE 10% , tL] 50 OR6O CYCLES O0009@ TTY POWER SUPPLY Figure 1-2. Power Supply PP/3494A/UG, System Diagram ORIGINAL PP-3494A/UG NAVSHIPS 94971 Paragraph GENERAL INFORMATION d. Inspector: Inspector of Naval Material, Chicago, Ill. _¢. Number of Packages: One complete unit per package f, Cubical Contents: 760 cubic inches uncrated ORIGINAL 1-2 g-. Total Weight: 31 pounds h. Power Supply: 120 volts, plus or minus 10%, 50 or 60 cycles plus or minus 5%, single phase i. Output Voltage: 120 or 48 volts d.c.,plus or minus 5% at 0.4 ampere. a Paragraph 2-1 SECTION 2 INSTALLATION 2-1. SITE SELECTION. Power Supply PP-3494A/UG may be located on any shelf, table, deck, or other horizontal surface. Sufficient clearance should be provided from other equipment and structures to allow adequate ventilation. Figure 2-1, Power Supply . PP-3494A/UG. Outline Drawing, indi- cates the over-all dimensions. Six 1/4-20 bolts are required to fasten the unit to its foundation. 2-2. POWER REQUIREMENTS. Power Supply PP-3494A/UG operates from a 120-volt, 50- or 60-cycle, single phase supply. (6) % DIA HOLES NAVSHIPS 94971 PP-3494A/UG INSTALLATION A removable plate is provided on the rear of the cabinet for access to the cable terminations and voltage ad- justment control R5. Cable entrance area for stuffing tube is indicated. on enclosure as shown in figure 2-1. 2-3. TERMINAL BOARD CONNEC- TIONS. Terminal board connections for output voltages of 48 volts and 120 volts are shown in figures 2-2 and 2-3. 2-4. VOLTAGE ADJUSTMENT. After connecting as shown in figures 2-2 or 2-3 for the desired voltage fine adjustment of voltage is obtained by means of control R5. To adjust R5, loosen locking nut, turn shaft with screwdriver for desired setting, and retighten locking nut. lq + +} - * as a oS aa 3 2 ee TOP VIEW ~) f ) 4 > LOUVERS FUSES. LIGHT ACCESS OO ODS | CABLE FPANEL L 10" FRONT VIEW _ SIDE VIEW REAR VIEW Figure 2-1. Power Supply PP-3494A/UG, Outline Drawing ORIGINAL PP-3494A/UG INSTALLATION Figure 2-2. TBI 6 1D © [ 5 PO ON C= OO FIG A | 3 |@ 2 1@ } 1 QO | Figure 2-3. ORIGINAL NAVSHIPS 94971 TBI 8 8 Terminal Board Connections 48-Volt Output TBI | 6 12 2 C 5 PO | 4 iO O | 3 2) 2 OQ | ! Ooo L Terminal Board Connections 120-Volt Output Figures 2-2, 2-3 iF MAXIMUM VOLTAGE OBTAINABLE WITH JUMPERS GONNECTED AS SHOWN IN FIG A iS LESS THAN 120V, CONNECT JUMPERS AS SHOWN IN FIG B. Paragraph NAVSHIPS 94971 OPERATION 3.1 PP-3494A/UG SECTION 3 indicating that a.c. power is available OPERATION to the Power Supply. 3-1. OPERATING PROCEDURES. Figure 3-1, Power Supply PP-3494A/UG Front View, shows the location ofthe With Power Supply PP-3494A/UG power line switch, power light and fuses. properly wired to the a.c. source and its d.c. load, and set for desired out- The Power Supply may be closed put voltage as per paragraph 2-4, it is down by placing the a.c. power line energized by placing the a.c. power switch Sl to the OFF position. No line switch in the ON position. The other operation or special precautions power light DS1 should come on, are necessary. Figure 3-1. Power Supply PP-3494A/UG Front View 3-0 ORIGINAL PP-3494A/UG PRINCIPLES OF OPERATION SECTION 4 PRINCIPLES OF OPERATION 4-1. FUNCTIONAL DESCRIPTION. Power Supply PP-3494A/UG (see figure 6-2) operates from a 120-volt, 50- or 60-cycle, single phase, a.c. source. Terminal board TB1 may be connected for an output voltage of 48 volts (see figure 2-2) or 120 volts (see figure 2-3). When switch S1 is in the ON posi- tion, input power is applied through radio frequency interference filter 22, lighting POWER indicator DS1l. The negative half-cycle of the input voltage is passed through diode CR7 and an in- put winding of the magnetic amplifier to the primary of Transformer Tl. The positive half-cycle is passed by diode CR8 and the other input winding of the magnetic amplifier to the primary of transformer Tl. The magnetic ampli- fier provides voltage regulations as described below. The voltage across the primary of transformer T1 is induced across the secondary which provides outputs of approximately 48 volts and 120 volts on pins 4 and 5 respectively. The voltage is stepped-down across the center-tapped secondary which pro- vides two 9-volt outputs. The center- tapped secondary is a voltage supply ORIGINAL NAVSHIPS 94971 Paragraph 4-1 used to compensate for variations causedby the 5%tolerance of the Zener diodes, CR1l and CR2. The selected voltage (either 48 volts or 120 volts) is full-wave rectified by bridge recti- fier CR3, CR4, CR5, and CR6. For a 48-volt output, the rectified voltage is filtered by inductor L1 and capacitor Cl; resistor R4isableeder. Fora 120-volt output, the rectified voltage is filtered by inductor Ll and capacitors C2A and C2B; resistor R3 is a bleeder. Voltage regulation of plus or minus 5% is achieved by varying the degree of saturation of the magnetic amplifier to compensate for load and line varia- tions. The bias winding of the magnetic amplifier (in series with resistor R2) biases the magnetic amplifier partially into saturation. The bias winding is energized through resistor R2. The control winding of the magnetic ampli- fier (in series with fuse F3) senses voltage variations in the output and varies the voltage drop across the magnetic amplifier, thereby adjusting the voltage across the primary of transformer Tl. The control winding is voltage referenced by voltage refer- ence diodes CR1 and CR2 in series with potentiometer R5. Potentiometer R5 is adjusted until the desired output voltage is reached. Fuse F3 provides protection against short circuiting of the Zener diodes. Paragraph 5-1 SECTION 5 TROUBLESHOOTING 5-1. GENERAL. NOTE The Bureau of Ships no longer requires the sub- mission of failure re- ports for all equipments. Failure Reports and Per- formance and Operational Reports are to be ac- complished for designated equipments to the extent required by existing dir- ectives. All failures shall be reported for those equipments requir- ing Failure Reports. If d.c. output voltage is absent make the following checks: a. Observe power indicating light DS1 for the presence of input power. b. Check blown fuse indicators for XF1l and XF2. The neon lights in NAVSHIPS 94971 PP-3494A/UG TROUBLESHOOTING the knob sections of these fuseholders will glow to indicate a blown fuse. c. Check the a.c. voltage at the input to the silicon bridge rectifier. This should read approximately 48 or 120 volts. If an abnormally low volt- age is indicated, an open condition may exist in transformer Tl, in magnetic amplifier Zl, or in rectifi- ers CR7 or CR8. d. Check the d.c. voltage across the filter capacitors. This should read approximately 48 or 120 volts. If no d.c. voltage is indicated, check capacitors Cl, C2A and C2B where applicable for a possible shorted con- dition. Defective silicon rectifiers CR3, CR4, CR5, and CR6 will also cause the d.c. voltage to be low or absent. e. Excessive variations in the d.c. output voltage may be caused by defective Zener diodes CR1 and CR2, magnetic amplifier Z1, diodes CR9. and CR10, or resistors Rl, R2, and R5. Check indicating fuseholder F3. It indicates fuse has blown, diodes CR1 or CRZ may be shorted. ORIGINAL PP-3494A/UG REPAIR SECTION 6 REPAIR 6-1, FAILURE REPORT. NOTE The Bureau of Ships no longer requires the sub- mission of failure re- ports for all equipments. Failure Reports and Per- formance and Operational Reports are to be ac- complished for designated equipments to the extent required by existing dir- ectives. All failures shall be reported for those equipments requir - ing Failure Reports. ORIGINAL 6-1 6-2. ADJUSTMENTS. Except for control R5 described in section 2-4, Power Supply PP-3494A/UG does not require any operational ad- justments. 6-3. REPAIR. Figure 6-1 indicates the parts loca- tion in Power Supply PP-3494A/UG Before any part is tested for a suspected defect, it should be dis- connected from the circuit. Circuit continuity and test points may be readily determined from fig- ure 6-2, schematic diagram; and fig- ure 6-3, wiring diagram. PP-3494A/UG REPAIR NAVSHIPS 94971 —— = ee — SS = = o ed : Se : / —— ih iy 1 eS SS ee ee ee SoS ee Se ee Power Supply PP-3494A/UG Top View Figure 6-1. 2 NAVSHIPS 94971 PP-3494A/UG REPAIR Figure 6-2 uotzer9dQO i{OA-Sh OF portM WreiseIq dTVeUIEyDS ON/WHbPe-dd Atddng 19m0g ‘7-9 OINnsTy +90 -9d Zuo $—_+»—_—4 OGDOO O 1 2u 9 ¢ v € r4 | (BL eA AAA —— QS ¢3 ONO oo |] os Ff 14d su +¢ © ryt , i I I 6499 i g + ‘ ot eT { 1 | l I v | M4 pHyd CH fe) <3! £49 949 $f eu 929] v2 3 19 + ; =< = wus > $ af + 3 + zai] 7 3 ai > NM oC eS yalis y3dLNi 3y 6-3 ORIGINAL PP-3494A/UG NAVSHIPS 94971 Figure 6-3 REPAIR uoTJeIIdO AQP IOF poyDeuUOD ‘ureriseiq SuIIIM ‘Atddng 1eamog "€-9 eanat A AVES 3ONVYO Nowe au / a Is anna r - he >. I é 3ONVYO Naau9 LATOIA rf a3u NMOU oe NMONG p> N3349 - | ——~oay | ———~Nmoua €-@4 su oa 3 C<D 1M | BONVEO™ Teal ' ¢¢ [== MOTI3A 1z — — ¢ S Q anne L3TOIA bud yy ama O 1 LAIOIA I y, Sud | | NMONa 7am 10 949 ~O 161 yore aun 2z LINOA £uo ame a : 3 | LL 137014 COREDS ama Thy 2 me i i O1ud a | IL MOTIEAg Aveo ~ HX) ¢ O HJ Roe 149} gonvaod PAI VA ro 6y2 oe O nmousy | +O Q) @—-_ bnmous : C <p | a» © L 9Oy i] | -+aay O18 Pp WOV1a-aLIHM MOTTS A” avuo4d — Laium ainmT | 44 [ a9NvuO+} avao-T [I | anne JONvYOT movie ar e) om J | annoud S 0209 y {28+ o 9 9 ec 285 32 cS +t a o ORIGINAL 6-4 PP-3494A/UG PARTS LIST SECTION 7 PARTS LIST 7-1. INTRODUCTION. a. Reference designations, pre- viously referred to as circuit symbols, have been assigned to identify all maintenance parts of the equipment. They are used for marking the equip- ment, adjacent to the part they identify, and are included on drawings, dia-. grams, and the parts list. b. Stock number of parts used in this equipment may be obtained by referring to the Stock Number Identi- fication Table (SNIT) published by E.S.O. ORIGINAL NAVSHIPS 94971 Paragraph 7-1 7-2. MAINTENANCE PARTS LIST. Table 7-1 lists the maintenance parts for Power Supply PP-3494A/UG Column 1 lists the reference desig- nation of the various parts in alpha- numerical sequence. Column 2 lists the name and de- scription of the various items. Column 3 lists the locating function of the part in the equipment. 7-3. LIST OF MANUFACTURERS. Table 7-2 lists manufacturers of parts used in the equipment. Column l indicates the abbreviations used to identify the Manufacturers. Table NAVSHIPS 94971 PP-3494A/UG 7-1 PARTS LIST Table 7-1. Maintenance Parts List Reference Locating Designation Function CR1 SEMICONDUCTOR DEVICE, DIODE: 43V 10W Figure 6-3 ° Zener, MIL type 1N2993B CR2 SEMICONDUCTOR DEVICE, DIODE: 75V 10W Figure 6-3 Zener, MIL type 1N3002B CR3 CRYSTAL UNIT, RECTIFIER: JAN 1N540 Figure 6-3 CR4 CRYSTAL UNIT, RECTIFIER: JAN 1N540 Figure 6-3 CR5 CRYSTAL UNIT, RECTIFIER: JAN 1N540 Figure 6-3 CR6 CRYSTAL UNIT, RECTIFIER: JAN 1N540 Figure 6-3 CR7 CRYSTAL UNIT, RECTIFIER: JAN 1N538 Figure 6-3 CR8 CRYSTAL UNIT, RECTIFIER: JAN 1N538 Figure 6-3 CRI CRYSTAL UNIT, RECTIFIER: JAN 1N538 Figure 6-3 CR10 CRYSTAL UNIT, RECTIFIER: JAN 1N538 Figure 6-3 Cl CAPACITOR, FIXED ELECTROLYTIC: Figure 6-3 500 mfd, 50 vdc, MIL type CE51C501G C2 CAPACITOR, FIXED ELECTROLYTIC: Figure 6-3 160-160 mfd, 150 vdc, MIL type CE52C161J DS1 LAMP, NEON: General Electric Co. Figure 6-3 Part No. NE-51 Fl FUSE; 2 amp, MIL type FO2A250V-2A Figure 6-3 F2 FUSE; 2 amp, MIL type F02A250V-2A Figure 6-3 F3 FUSE: 1/8 amv. MIL tvve FO2ZA250V-1/8A Figure 6-3 Ll REACTOR; AEROTRONIC P/N 82009, Figure 6-3 Type TF4RX04JB MIL-T-27A Rl RESISTOR, FIXED, WIREWOUND: 1800 ohms Figure 6-3 +5% MIL type RW29 R2 RESISTOR, FIXED, WIREWOUND: 820 ohms Figure 6-3 +5%, MIL type RW29 R3 RESISTOR, FIXED, WIREWOUND: 2000 ohms Figure 6-3 +5%, MIL type RW29 R4 RESISTOR, FIXED, WIREWOUND: 1000 ohms Figure 6-3 +5%, MIL type RW29 R5 RESISTOR, VARIABLE: 50 ohms +10%, MIL Figure 6-3 type RA20 7-2 ORIGINAL PP-3494A/UG NAVSHIPS 94971 Table PARTS LIST 7-1 Table 7-1 (continued) Reference Locating Designation Function Sl SWITCH, TOGGLE: MS35059-22 Figure 6-3 TBl TERMINAL BOARD: MIL type 8TB6 Figure 6-3 TB2 TERMINAL BOARD: MIL type 40TB5 Figure 6-3 Tl TRANSFORMER POWER: AEROTRONIC P/N Figure 6-3 ‘82007, type TF4RX02GA, MIL-T-27A XDS1 LIGHT, INDICATOR: MIL type LH76LC14RD Figure 6-3 XF1 FUSEHOLDER, INDICATING: MIL type Figure 6-3 FHL17G XF2 FUSEHOLDER, INDICATING: MIL type Figure 6-3 FHL17G XF3 FUSEHOLDER, INDICATING: MIL type Figure 6-3 FHL18G Z1 AMPLIFIER, MAGNETIC: AEROTRONIC P/N Figure 6-3 82008, type TF4RX41KA MIL-T-27A Z2 FILTER, RADIO INTERFERENCE: Figure 6-3 AEROTRONIC Part No. 82012 Table 7-2. List of Manufacturers Name Address General Electric Company Bussman Mfg. Div. ORIGINAL Cleveland, Ohio St. Louis, Missouri Miniture Lamp Div., Nela Park, Ly