HARRIS TR-0017-E Sitepro Base Station User Manual Power Supply
HARRIS CORPORATION Sitepro Base Station Power Supply
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Contents
Power Supply
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| Document ID | 311102 |
| Application ID | 075vpy9BfOZpg8rQ7aTVIQ== |
| Document Description | Power Supply |
| Short Term Confidential | No |
| Permanent Confidential | No |
| Supercede | No |
| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 70.25kB (878071 bits) |
| Date Submitted | 2003-03-18 00:00:00 |
| Date Available | 2003-03-07 00:00:00 |
| Creation Date | 2002-10-28 15:31:56 |
| Producing Software | Acrobat Distiller 5.0.5 (Windows) |
| Document Lastmod | 2002-10-28 10:36:00 |
| Document Title | LBI-38550D, Site Equipment Power Supply, 19A149978P1 - 120 VOLT/60 Hz, 19A149978P2 - 230 VOLT/50 Hz |
| Document Creator | ADOBEPS4.DRV Version 4.50 |
| Document Author: | M/A-COM Private Radio Systems, Inc. |
Maintenance Manual LBI-38550D Site Equipment Power Supply 19A149978P1 - 120 VOLT/60 Hz 19A149978P2 - 230 VOLT/50 Hz CAUTION THESE SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY. TO AVOID ELECTRIC SHOCK DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN THE OPERATING INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO. REFER ALL SERVICING TO QUALIFIED SERVICE PERSONNEL. WARNING: TO PREVENT FIRE OR ELECTRIC SHOCK HAZARD. DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE. CAUTION: TO PREVENT ELECTRIC SHOCK DO NOT USE THIS (POLARIZED) PLUG WITH AN EXTENSION CORD, RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE. LBI-38550D TABLE OF CONTENTS Page SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IMPORTANT SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CIRCUIT ANALYSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OUTLINE DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 ASSEMBLY DIAGRAMS 60 Hz Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Hz Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 16 SCHEMATIC DIAGRAMS 60 Hz Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Hz Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 17 PART LISTS 60 Hz Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Hz Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 18 SAFETY NOTES • The means of disconnecting power from a station cabinet is the cabinet power supply plug. • When conducting repair/maintenance, disconnect the cabinet power supply plug from the AC source. • In European applications, equipment must be installed in a closed cabinet. • Only replace components with components specified by M/A-COM Private Radio Systems. NOTICE! Repairs to this equipment should be made only by an authorized service technician or facility designated by the supplier. Any repairs, alterations or substitution of recommended parts made by the user to this equipment not approved by the manufacturer could void the user’s authority to operate the equipment in addition to the manufacturer’s warranty. NOTICE! The software contained in this device is copyrighted by M/A-COM Private Radio Systems, Inc. Unpublished rights are reserved under the copyright laws of the United States. This manual is published by M/A-COM Private Radio Systems, Inc., without any warranty. Improvements and changes to this manual necessitated by typographical errors, inaccuracies of current information, or improvements to programs and/or equipment, may be made by M/A-COM Private Radio Systems, Inc., at any time and without notice. Such changes will be incorporated into new editions of this manual. No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, for any purpose, without the express written permission of M/A-COM Private Radio Systems, Inc. Copyright© 1990 - 2002 M/A-COM Private Radio Systems, Inc. All rights reserved. LBI-38550D SPECIFICATIONS* OUTPUT VOLTAGE Transmit and Receive Simultaneously 13.2 Vdc ±0.6 Vdc @ 29 Amps (F801B) 13.2 Vdc ±0.6 Vdc @ 4 Amps (J801) Receive only < 16.0 Vdc @ 3 Amps (J801) Transmit only (For 225 watt PA option) 13.2 Vdc ±0.6 Vdc @ 33 Amps (F801B) INPUT VOLTAGE 121 Vac ±20% (60 Hz version) 230 Vac ±15% (50 Hz version) INPUT FREQUENCY 60 Hz ±2 Hz (60 Hz version) 50 Hz ±2 Hz (50 Hz version) Note: For every + 1.0% change in the input frequency, the output voltage will not vary more than + 1.6% from the output voltage measured at the nominal input line frequency. INPUT LINE SURGE PROTECTION DUTY CYCLE For 0-33 Amp output OUTPUT VOLTAGE RIPPLE OUTPUT TRANSIENT RESPONSE Overshoot Undershoot EFFICIENCY FUSE CAPABILITY Input Output 150 V rated MOV (60 Hz version) 275 V rated MOV (50 Hz version) 100% (Continuous Duty) < 100 mV p-p @ 25°C < 200 mV p-p @ -30°C Not to exceed 18 Volts Not less than 11 Volts > 70% @ rated TX/RX load current and nominal line voltage 10 Amp (60 Hz version) (2) 5 Amp (50 Hz version) 5 Amp (Low Current Port) 40 Amp (High Current Port) DIMENSIONS (HxWxD) 5.25" x 19" x 10.35" WEIGHT 45 lbs. OPERATING ENVIRONMENT -30°C To +60°C * These specifications are intended primarily for the use of the service personnel. Refer to the appropriate Specification Sheet for the complete specifications. LBI-38550D IMPORTANT SAFETY INFORMATION 1. SAVE THIS MANUAL - It contains important safety and operating instructions. 2. Before using the product, please follow and adhere to all warnings, safety and operating instructions located on the product and in the manual. 3. DO NOT expose product to rain, snow or other type of moisture. 4. Care should be taken so objects do not fall or liquids do not spill into the product. 5. DO NOT expose product to extreme temperatures. 6. DO NOT use auxiliary equipment not recommended or sold by the manufacturer. To do so may result in a risk of fire, electric shock or injury to persons. 7. To reduce risk of damage to electrical cord, pull by plug rather than cord when disconnecting unit. 8. Make sure the cord is located so it will not be stepped on, tripped over or otherwise subjected to damage or stress. 9. An extension cord should not be used unless absolutely necessary. Use of an improper extension cord could result in a risk of fire and electric shock. If an extension cord must be used, make sure: a. That pins on the plug of the extension cord are the same number, size and shape as those of the plug on the power supply. b. That the extension cord is properly wired in good condition. c. That the wire size is large enough for AC ampere rating of unit. 10. DO NOT operate unit with a damaged cord or plug. Replace the damaged cord immediately. 11. DO NOT operate this product in an explosive atmosphere unless it has been specifically certified for such operation. 12. To reduce risk of electric shock, unplug unit from outlet before attempting any maintenance or cleaning. 13. DO NOT operate this product with covers or panels removed.This unit does not contain any user serviceable components. 14. Use only fuses of the correct type, voltage rating and current rating as specified in the parts list. Failure to do so can result in fire hazard. 15. GROUNDING AND AC POWER CORD CONNECTION - To reduce risk of electrical shock use only a properly grounded outlet. The unit is equipped with an electric cord having an equipment - grounding conductor and a grounding plug. Be sure the outlet is properly installed and grounded in accordance with all local codes and ordinances. 16. DANGER - Never alter the AC cord or plug. Plug into an outlet properly wired by a qualified electrician. Improper connection or loss of ground connection can result in risk of an electrical shock. 17. The Model 19A149978P2 is for use on a circuit having a nominal rating of 230 Vac and is factory equipped with a specific electric cord to permit connection to an acceptable electric circuit. A plug meeting local electrical codes must be supplied by the customer. Make sure the unit is connected to an outlet having the same configuration as the plug. No adapter should be used with this unit. NOTE A ferroresonant power supply is designed to work specifically at a given frequency. The 60 and 50 Hz supplies should be used at their nominal frequency ±2 Hz. LBI-38550D Figure 1 - 60 Hz Power Supply (19A149978P1, Rev. B) Figure 2 - 50 Hz Power Supply (19A149978P2, Rev. A) LBI-38550D DESCRIPTION The M/A-COM MASTR II Site Equipment Power Supply provides up to 435 watts to power the site equipment receiver, systems circuitry, and transmitter. The power supply normally will be used to provide power to a MASTR II Site Equipment with a maximum of 29 Amps to the power amplifier and 4 Amps for the Receiver/systems circuitry. The supply can also optionally be used to power a 225 watt power amplifier. In this case the supply is connected only to the power amplifier and will provide a maximum of 33 Amps. The 60 Hz Model (19A149978P1) operates from a nominal 121 Vac, 60 Hz source. If a 208/220/240 Vac 60 Hz Source is to be used, an external step-down transformer (similar to 19C307148P1) must be used with the 978P1 supply. The 50 Hz Model (19A149978P2) provides the same outputs as the ’978P1 supply but operates from a nominal 230 Vac, 50 Hz source. The output voltage will change a maximum of + 1.6% for each + 1.0% change in the input line frequency. NOTE A ferroresonant power supply is designed to work specifically at a given frequency. The 60 and 50 Hz supplies should be used at their nominal frequency ±2 Hz. The power supply’s step-down ferroresonant transformer provides excellent line voltage regulation. For the rated input line voltage range (±20% for P1 ±15% for P2), the output voltage will not vary more than 2 %. A ferroresonant power supply provides inherently excellent line voltage surge protection, and reduced parts count for high reliability. No active semiconductor devices are used which could reduce reliability. The output voltage will vary depending on the load current that the supply is being asked to source. As the load current rises, the output voltage will drop. Typically the output voltage will be 13.2 volts for a 33 Amp load, less than 16.0 volts for a 3 Amp load, and less than 16.7 volts for no load. The operation and servicing of the power supply are completely accessible from the front. The ON/OFF switch and all fuses are located on the front panel. The low profile slot type fuse holders contain the primary fuse F1 (F1 & F4 for 978P2) and the low current output fuse F3. The high current output fuse F2 is mounted behind the front panel fuse cover. The primary fuse F1 (F1 & F4 for 978P2) protects the input wiring to the ferroresonant transformer (10 Amps for P1, 5 Amps each for P2). The output fuses F2 (40 Amps) and F3 (5 Amps) provide external overload protection. The 60 Hz supply provides a courtesy dual AC receptacle. The primary line current fuse (F1) also provides overcurrent protection for the dual receptacle. The 60 Hz supply draws 5 Amps under nominal conditions and 7 Amps under all extremes. Thus, the dual courtesy receptacles are rated to provide a line current of 3 Amps. CIRCUIT ANALYSIS In the 60 Hz power supply (978P1), the ON/OFF switch (S1) provides line voltage to the power supply through the primary line fuse F1. In the Rev. B version, line voltage flows through F1 to the courtesy receptacles prior to S1. This allows line voltage to always be available at the receptacles. In previous models (Rev. A and earlier), S1 applies line voltage to F1 and the courtesy receptacles in turn. Current then flows through the primary of step-down transformer (T1) via the 200°C thermal fuse. The thermal fuse would only open in the unlikely event that an internal short would develop in the transformer. The Varistor (VR1 - 150 V rating) provides additional input line voltage suppression. In the 50 Hz power supply (978P2), the ON/OFF switch (S1) is a DPST type switching both primary AC lines. In addition, both input lines have 5 Amp fuses (F1 and F4). The Varistor (VR1 - 275 V rating) provides additional input line voltage suppression. When power is applied, current flows through the primary of step-down transformer (T1) via the 200°C thermal fuse. As in the 60 Hz model, the thermal fuse will open if the transformer develops an internal short. The step-down transformer is a ferroresonant type which has inherently good input line voltage regulation - eliminating the need for additional high-current regulators. C1 serves as a resonating capacitor across the secondary taps of the transformer. The transformer steps the input voltage down to approximately 14 volts (for a 33 Amp load) and 16 volts (for a 3 Amp load). It then applies the stepped-down voltage to the full wave rectifier circuitry consisting of D1A,B through D3A,B and the high current filter. The rectifiers are dual diode packages and are mounted on heat sink HS1. The high current filter consists of C2-C7 and L1. It is designed to reduce the output ripple to less than 100 mV p-p for any current load up to 33 Amps. It also keeps transient responses greater than 11 and less than 18 volts. Resistor R1 is a 10 ohm, 50 watt resistor that serves two functions. One, it acts as a bleeder resistor to discharge the capacitors when the supply is turned off. Two, it provides a minimum current LBI-38550D load to prevent the output voltage from ever rising above 18 volts under any load condition. Under normal conditions jumper P802 is installed connecting the bleeder resistor (SW GND) to A-. In 60 Hz models (Rev. A and earlier), prior to Rev. B, this is done using a ground strap externally connected between F801B-2 and F801B-3. When the emergency power option is used, the jumper or ground strap is removed. This allows the relay K3 in charger 344A3168 to ground or open the bleeder resistor. When line voltage is present, the relay grounds the bleeder resistor to A-. In an emergency power condition, the relay open-circuits the bleeder resistor preventing premature drainage of the battery powering the station. The high current filter sources current to both the high current and the low current output ports. It can source up to 33 Amps through 40 Amp fuse (F2) to the high current terminal strip (F801B) on the rear wall of the power supply chassis. F801B-1 and F801B-2 are A + and A-, respectively, and connect to the transmitter power amplifier. For site equipment that does not have emergency power options, F801B-3 and F801B-4 are not used. For emergency power options, F801B-3 & 4 provide connection between the power supply and the charger. In an emergency power condition, the external battery is connected through the charger, and through the power supply, to provide emergency power for the site equipment. The high current filter sources up to 4 Amps through 5 Amp fuse (F3) to the 9 pin molex connector (J801). This port provides power to the receiver and system circuitry in the site equipment. J801-1,2,3 are A +, and J801-4,5,6 are A-. An internal jumper between J801-7 and -8 allows a feedthru for the optional emergency power status line. J8019 provides SW GND for the emergency power options. The power supply is rated for a nominal 13.2 Vdc for a 29 Amp load out of F801B and a 4 Amp load out of J801 (receiving and transmitting simultaneously). When receiving only (a 3 Amp load out of J801), the output voltage is less than 16.0 Vdc. MAINTENANCE For disassembly, remove 8 screws and lift off top cover. Disassembly is required before working on the power supply. When replacing any component be certain to use an identical component. Thermal joint compound is required between diodes D1, D2 and D3 and the heat sink. WARNING To avoid electrical To avoid electrical shock, disconnect power supply from the AC input power source before removing or replacing any component or assembly. TROUBLE-SHOOTING The trouble-shooting procedure in Table 1 may be helpful in isolating a defective component or assembly in a malfunctioning power supply. When a component or assembly is identified as defective, replace the defective component with an identical component. Be sure to check associated circuitry for any other damaged components before applying power to the unit. ADJUSTMENTS This power supply has no adjustments or controls other than the ON/OFF switch. INSTALLATION The power supply is normally installed in an EIA 19 inch wide rack of a MII Site Equipment cabinet. It can also be installed in a 19 inch wide stand alone open rack. NOTE Insure that ventilation holes in the unit are not obstructed when the unit is mounted or in operation. LBI-38550D Figure 3 - 60 Hz Power Supply (19A149978P1, Rev. B) Figure 4 - 50 Hz Power Supply (19A149978P2, Rev. A) LBI-38550D FUSE REPLACEMENT To replace a defective fuse, perform the following procedure WARNING To avoid electrical To avoid possible electric shock, DO NOT operate this power supply with the fuse cover removed. 1. Place ON/OFF switch to the OFF position. 2. For fuses F1 (F1 & F4 on 978P2) or F3, remove cap from fuse holder and replace fuse with a fuse of the same type and rating. 3. For fuse F2, remove two screws holding fuse cover to front panel. Remove defective fuse and replace with a fuse having the same type and rating. Replace fuse cover and secure using the 2 screws. WARNING To avoid electrical No one should be permitted to handle any portion of the equipment that is supplied with high voltage, or to connect any external apparatus to the units while the units are supplied with power. KEEP AWAY FROM LIVE CIRCUITS. Table 1 - 60 Hz Power Supply 19A149978P1 SYMPTOM No output voltage at J801 PROCEDURE Check the following: 1. Open F1, F3 or S1 2. AC voltage on W801 3. Open D1, D2 or D3 No output voltage at F801B Check the following: 1. Open F1, F2 or S1 2. AC voltage on W801 3. Open D1, D2 or D3 Low output voltage on F801B or J801. Check the following: 0 < Vo < 12.5 Vdc 1. If one of the dual diodes on D1, D2 or D3 is shorted NOTE: All three diode packages contain two diodes each 2. Line frequency < 60 Hz High output voltage on F801B or J801. Check the following: 1. Spade jumper is connected between pos 2 and 3 on F801B (Rev. A and earlier) Vo . > 16.7 Vdc Plug P802 is connected to connector J802 (Rev. B and later) 2. R1 not connected between pos 1 and 3 on F801B LBI-38550D TROUBLESHOOTING PROCEDURE Table 2 - 50 Hz Power Supply 19A149978P2 SYMPTOM No output voltage at J801 PROCEDURE Check the following: 1. Open F1, F3, F4 or S1 2. AC voltage on W801 3. Open D1, D3 or D3 No output voltage at F801B Check the following: 1. Open F1, F2, F4 or S1 2. AC voltage on W801 3. Open D1, D2 or D3 Low output voltage on F801B or J801. Check the following: 0 < Vo < 12.5 Vdc 1. If one of the dual diodes on D1, D2 or D3 is shorted NOTE: All three diode packages contain two diodes each 2. Line frequency < 50 Hz High output voltage on F801B or J801. Check the following: 1. Plug P802 is connected to connector J802 Vo . > 16.7 Vdc 2. R1 not connected between pos 1 and 3 on F801B 3. Line frequency > 50 Hz 10 TROUBLESHOOTING PROCEDURE LBI-38550D COMPONENT SIDE (33014904, Rev. F) (33014900, Sh. 1, Rev. F) SOLDER SIDE (33014904, Rev. F) (33014900, Sh. 2, Rev. F) PRINTED CIRCUIT BOARD 50 HZ AND 60 HZ MODELS 11 LBI-38550D ASSEMBLY DIAGRAM Rev. 0 & Rev. A (Made from 289PS1, Rev. A) 60 HZ POWER SUPPLY 19A149978P1 12 Rev. B (Made from 289PS11, Sh. 2, Rev. A) SCHEMATIC DIAGRAM LBI-38550D 60 HZ POWER SUPPLY 19A149978P1, Rev. 0 & Rev. A 13 LBI-38550D 60 HZ POWER SUPPLY 19A149978P1, Rev. 0 & Rev. A 14 SCHEMATIC DIAGRAM PARTS LIST LBI-38550D 15 LBI-38550D ASSEMBLY DIAGRAM (Made from 289PS2, Sh. 2, Rev.Q) 50 HZ POWER SUPPLY 19A149978P2 16 SCHEMATIC DIAGRAM LBI-38550D 50 HZ POWER SUPPLY 19A149978P2 (289PS2, Sh. 1, Rev. H) 17 LBI-38550D M/A-COM Wireless Systems 3315 Old Forest Road Lynchburg, Virginia 24501 (Outside USA, 434-385-2400) Toll Free 800-528-7711 www.macom-wireless.com PARTS LIST Printed in U.S.A.
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File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.3 Linearized : No Encryption : Standard V1.2 (40-bit) User Access : Print, Copy, Fill forms, Extract, Assemble, Print high-res Create Date : 2002:10:28 15:31:56Z Modify Date : 2002:10:28 10:36:00-05:00 Subject : Maintenance Manual Page Count : 18 Creation Date : 2002:10:28 15:31:56Z Mod Date : 2002:10:28 10:36:00-05:00 Producer : Acrobat Distiller 5.0.5 (Windows) Author : M/A-COM Private Radio Systems, Inc. Metadata Date : 2002:10:28 10:36:00-05:00 Creator : M/A-COM Private Radio Systems, Inc. Title : LBI-38550D, Site Equipment Power Supply, 19A149978P1 - 120 VOLT/60 Hz, 19A149978P2 - 230 VOLT/50 Hz Description : Maintenance Manual Page Mode : UseThumbs Page Layout : SinglePageEXIF Metadata provided by EXIF.tools