M/A-Com P5100 Series Manuale utente

Maintenance Manual

LBI-38551C

THESE SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PER-

SONNEL ONLY. TO AVOID ELECTRIC SHOCK DO NOT PERFORM ANY

SERVICING OTHER THAN THAT CONTAINED IN THE OPERATING IN-

STRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO. REFER ALL

SERVICING TO QUALIFIED SERVICE PERSONNEL

CAUTION

MASTR®II Site Equipment

12/24V Power Supply

19A149979P1 - 120 VOLT/60 Hz

19A149979P2 - 230 VOLT/50 Hz

WARNING: TO PREVENT FIRE OR ELECTRIC SHOCK HAZARD. DO NOT EX-

POSE 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 UN-

LESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPO-

SURE.

TABLE OF CONTENTS

Page

IMPORTANT SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

CIRCUITANALYSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

OUTLINE DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

ASSEMBLY DIAGRAMS

60 Hz Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

50 Hz Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

SCHEMATIC DIAGRAMS

60 Hz Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

50 Hz Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

PARTS LIST

60 Hz Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

50 Hz Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

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 operated the equipment in addition to the manufacturer’s warranty.

This manual is published by M/A-COM Private Radio Systems, Inc., without any warranty. Improvements and changes to this manual necessitated by typo-

graphical 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 trans-

mitted 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.

LBI-38551C

IMPORTANTSAFETY

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 liq-

uids do not spill into the product.

5. DO NOT expose product to extreme temperatures.

6. DO NOT use auxiliary equipment not recom-

mended 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 abso-

lutely 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, and

c. That the wire size is large enough for AC am-

pere rating of unit.

10. DO NOT operate unit with a damaged cord or plug

- replace them immediately.

11. DO NOT operate this product in an explosive at-

mosphere 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 clean-

ing.

13. DO NOT operate this product with covers or pan-

els 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. Fail-

ure to do so can result in fire hazard.

15. GROUNDING AND AC POWER CORD CON-

NECTION - To reduce risk of electrical shock use

only a properly grounded outlet. The unit is

equipped with an electric cord having an equip-

ment - 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 electri-

cian. Improper connection or loss of ground con-

nection can result in risk of an electrical shock.

17. The Model 19A149979P2 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.

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.

NOTE

LBI-38551C

SPECIFICATIONS*

OUTPUT VOLTAGE

Transmit and Receive Simultaneously 26.0 Vdc ±1.0 Vdc @ 15 Amps (F801A)

13.0Vdc ±0.5Vdc @ 3 Amps (J801)

Receive only Vdc @ 3 Amps (J801)

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 150 V rated MOV (60 Hz version)

275 V rated MOV (50 Hz version)

DUTY CYCLE

For 0-18 Amp output 100% (Continuous Duty)

OUTPUT VOLTAGE RIPPLE < mV p-p @ 25°C

< mV p-p @ -30°C

OUTPUT TRANSIENT RESPONSE

Overshoot Not to exceed 30 Volts (F801A)

Undershoot Not less than 22 Volts (F801A)

EFFICIENCY 70% @ rated TX/RX load current and nominal line voltage

FUSE CAPABILITY

Input 10 Amp (60 Hz version)

(2) 5 Amp (50 Hz version)

Output 5 Amp (Low Current Port)

20 Amp (High Current Port)

DIMENSIONS (H x W x D) 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.

LBI-38551C

DESCRIPTION

The MASTR®II Site Equipment 12/24 Volt Power

Supply provides up to 429 watts to power a MASTR II 800

or 900 MHz site equipment receiver, system circuitry, and

transmitter. The nominal 12 volt output is actually 13.0 Vdc

and provides a maximum of 3 amperes to power the re-

ceiver and system circuitry. The nominal 24 volt output is

actually 26.0 Vdc and provides a maximum of 15 amperes

to power the transmitter power amplifier.

The 60 Hz Model (19A149979P1) operates from a

nominal 121 Vac, 60 Hz source. If a 208/220/240Vac, 60 Hz

source is used, an external step-down transformer (similar to

19C307148P1) must be used with the ’979P1 supply. The

50 Hz model (19A149979P2) provides the same output as

the ’979P 1 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.

The power supply’s step-down ferroresonant trans-

former 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 ferroreso-

nant power supply provides inherently excellent line voltage

surge protection, and fewer parts for high reliability. No ac-

tive semiconductor devices are used which could reduce re-

liability.

The output voltages will vary depending on the load cur-

rents that the supply is being asked to source. As the load

current rises, the output voltage will drop. Typical output

voltages for various load currents are as follows:

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(s) F1 (F1 and

F4 for P2), the high current output fuse F2, and the low cur-

rent output fuse F3. The primary fuse(s) protect the input

wiring to the ferroresonant transformer (one 10 amp fuse for

P1, two 5 amp fuses for P2). The output fuses F2 (20 amps)

and F3 (5 amps) provide external overload protection.

The 60 Hz supply provides a courtesy dual AC recepta-

cle. The primary line current fuse (F1) also provides over-

current protection for the dual receptacle. The 60 Hz supply

draws 5 amps under nominal conditions and 7 amps under

all conditions. Thus, the dual courtesy receptacles are rated

for 3 amps.

CIRCUITANALYSIS

In the 60 Hz power supply (’979P 1), the ON/OFF

switch (S1) provides line voltage to the power supply

through the primary line fuse F1. Line current flows through

F1 to the courtesy receptacle prior to S1. This allows line

voltage to always be available at the receptacles. Current

then flows through the primary of stepdown 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 rat-

ing) provides addition input line voltage suppression.

In the 50 Hz power supply (’979P2), 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 in-

put line voltage suppression. When power is applied, cur-

rent flows through the primary of step-down transformer

(T1) via the 200°C thermal fuse. As in the 60 Hz model, the

thermal fuse would only open if the transformer develops an

internal short.

The step-down transformer (T1) is a ferroresonant type

which has inherently good input line voltage regulation.

This eliminates the need for additional high current regula-

A ferroresonant power supply is designed to work

specifically at a given frequency. The 60 Hz and 50

Hz supplies should be used at their nominal fre-

quency ±2 Hz.

NOTE

LOAD CURRENT CONDITIONS 12 V OUTPUT 24 V OUTPUT

TX AND RX SIMULTANEOUSLY (15 + 3 AMPS) ~13.0 VDC ~26.0 VDC

RX ONLY (0 + 3 AMPS) <15.8 VDC <29.0 VDC

NO LOAD (0 + 0 AMPS) <16.3 VDC <30.0 VDC

LBI-38551C

Figure 1 - 60 Hz Power Supply (19A149979P1, Rev. A)

Figure 2 - 50 Hz Power Supply (19A149979P2, Rev. A)

LBI-38551C

tors. C9 serves as a resonating capacitor across the secon-

dary taps of the transformer.

The transformer steps the input voltage down to ap-

proximately 28 Vac across two secondary windings. Each

winding drives two separate full wave bridge rectifiers con-

sisting of D1A, B through D4A, B. The rectifiers are dual

diode packages and are mounted on heat sink HS 1. During

the first half of the period diodes D1B, D2A, D3B, and D4A

are conducting and delivering current which is summed at

the input to the high current filter. During the second half of

the period diodes D1A, D2B, D3A, and D4B are conducting

and also delivering current which is summed at the input to

the high current filter. The high current filter consists of C1-

C4, C7, L1, and R1. It is designed to reduce the output rip-

ple to less than 100 mV p-p for any current load up to 15

amps. It also keeps transient responses greater than 22 volts

and less than 30 volts. Resistor R1 is a 30 ohm, 50 watt re-

sistor that serves two functions. One, it acts as a bleeder re-

sistor to discharge the capacitors when the supply is turned

off. Two, it provides a minimum current load to prevent the

output voltage from ever rising above 30 volts under any

load condition. The high current filter sources up to 15 amps

through the 20 amp fuse F2 to the high current output port

F801A on the rear wall of the chassis. F801A-1 and F801A-

2 are A+ and A-, respectively, and connect to the transmitter

power amplifier.

The two secondary windings are also center tapped to

produce a step-down voltage of around 14 Vac which is also

fed to the two full wave bridge rectifiers. During the first

half of the period, diodes D2A and D4A provide a conduc-

tion path for current going to both the high current filter and

the low current filter. During the second half of the period,

diodes D1A and D3A provide the conduction path for cur-

rent going to the high current filter and the low current fil-

ter. The low current filter consists of C5, C6, L2, and R2. It

is designed to reduce the output ripple to less than 100 mV

p-p for any current load up to 3 amps. It also keeps transient

responses greater than 11 volts and less than 18 volts. Resis-

tor R2 is a 100 ohm, 10 watt resistor that serves two func-

tions. One, it acts as a bleeder resistor to discharge the

capacitors when the supply is turned off. Two, it provides a

minimum current load to prevent the output voltage from

ever rising above 18 volts under any load condition. The

low current filter sources up to 3 amps through the 5 amp

fuse F3 to the low current output port J801 on the rear wall

of the chassis. J801-1, 2, 3 and J801-4,5,6 are A+ and A-,

respectively, and connect to the receiver and system cir-

cuitry.

The power supply is rated for a nominal 26.0 Vdc for a

15 amp load out of F801A and for a nominal 13.0 Vdc for a

3 amp load out of J801 (receiving and transmitting simulta-

neously). When receiving only (a 3 amp load out of J801)

the output voltage is less than 15.8 Vdc at J801 and less

than 29.0 VDC at F801A.

MAINTENANCE

For disassembly, remove 8 screws and lift off top cover.

Disassembly is required before working on the power sup-

ply. When replacing any component be certain to use an

identical component. Thermal joint compound is required

between diodes D1, D2, D3, and D4 and the heat sink.

TROUBLE-SHOOTING

The trouble-shooting procedure in Table 1 may be help-

ful in isolating a defective component or assembly in a mal-

functioning 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 apply-

ing 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.

To avoid electrical shock, disconnect power supply

from the AC input power source before removing or

replacing any component or assembly.

WARNING

Insure that ventilation holes in the unit are not ob-

structed when the unit is mounted or in operation.

NOTE

LBI-38551C

Figure 3 - 60 Hz Power Supply (19A149979P1, Rev. A)

Figure 4 - 50 Hz Power Supply (19A149979P2, Rev. A)

LBI-38551C

FUSE REPLACEMENT

To replace a defective fuse, perform the following pro-

cedure:

1. Place ON/OFF switch to the OFF position.

2. For fuses F1 (F1 & F4 on ’979P2), F2, or F3; re-

move cap from fuse holder and replace fuse with a

fuse of the same type and rating.

To avoid possible electric shock, DO NOT operate

this power supply with the fuse cover removed.

WARNING

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.

WARNING

LBI-38551C

TROUBLESHOOTING PROCEDURES

SYMPTOM PROCEDURE

No output voltage at J801 Check the following:

1. Open F1, F3 or S1

2. AC voltage on W801

3. Open D1, D2, D3, or D4

No output voltage at F801A Check the following:

1. Open F1, F2 or S1

2. AC voltage on W801

3. Open D1, D2, D3, or D4

Low output voltage on F801A.

0 < Vo < 25.0 Vdc

Check the following:

1. If one of the dual diodes on D1, D2, D3, or D4 is shorted

NOTE: All four diode packages contain two diodes each

2. Line frequency < 60 Hz

3. Load current greater than 15.0 amps

Low output voltage on J801.

0 < Vo < 12.5 Vdc

Check the following:

1. If one of the dual diodes on D1, D2, D3, or D4 is shorted

NOTE: All four diode packages contain two diodes each

2. Line frequency < 60 Hz.

3. Load current greater than 3.0 amps

High output voltage on F801A

(>30.0 Vdc) or J801 (>16.3 Vdc). Check the following:

1. R1 not connected between pos. 1 and 2 on F801A

2. R2 not connected between pos. 1 and 4 on J801

3. Line frequency >60 Hz

Table 1 - 60 Hz Power Supply 19A149979P1

LBI-38551C

Altri manuali per P5100 Series

Indice

Altri manuali M/A-Com Alimentazione elettrica

M/A-Com

M/A-Com P5100 Series Manuale utente

Manuali Alimentazione elettrica popolari di altre marche

Monacor

Monacor PS-12CCD Manuale utente

VOLTIMA

VOLTIMA MagicBox 15 Manuale utente

Agilent Technologies

Agilent Technologies 6032A Manuale utente

Miller

Miller Auto Deltaweld 452 Manuale utente

BCP

BCP PUOUBK Foglio di istruzioni

HC 2210 Manuale utente

Puls

Puls CT5.241 Manuale utente

OCZ

OCZ ZX1250W Manuale utente

iseg

iseg ECH 238 Manuale utente

Power

Power XXL A Series Manuale utente

Agilent Technologies

Agilent Technologies 6631B Manuale utente

Renogy

Renogy PHOENIX 300 Manuale utente

HP 6200B Manuale di servizio

Epson

Epson Stylus Scan 2500 Manuale operativo

Pulsar

Pulsar GREEN POWER CCTV PoE POE044816 Manuale utente

Puls

Puls MiniLine ML50.100 Manuale utente

Puls

Puls AS-Interface SLA4.100 Manuale utente

Kenwood

Kenwood PS-60 Manuale utente