R.V.R. Elettronica PJ250-NV Bedienungsanleitung

Manufactured by R.V.R. Elettronica - Italy

TECHNICAL AND MAINTENANCE MANUAL

MANUALE TECNICO E DI MANUTENZIONE

PJ250-NV

PJ250-NV Technical and Maintenance Manual

R.V.R. Elettronica S.r.l. (Bo) Pag. 2

PJ250-NV

250W F.M. BROADBAD AMPLIFIER

Technical and Maintenance Manual

Manuale Tecnico e di

Manutenzione

English Pag. 3

Italiano Pag. 35

PJ250-NV Technical and Maintenance Manual

R.V.R. Elettronica S.r.l. (Bo) Pag. 3

INDEX

Prliminary Instructions & Warranty Information Pag. 5

Safety Regulations Pag. 7

SECTION 1

General Description Pag. 10

Electrical Specifications (Table A) Pag. 12

Dimensional & Environmental Specifications (Table B) Pag. 13

SECTION 2

Electrical Description Pag. 14

Front Panel's View Description Pag. 16

Front Panel's View (Fig. 1) Pag. 17

Rear Panel's View Description Pag. 18

Rear Panel's View (Fig. 2) Pag. 19

Top's View Description Pag. 20

Top's View (Photo 1) Pag. 21

Down's View Description Pag. 22

Upper's View (Photo 2) Pag. 23

Block Diagram (Fig. 3) Pag. 24

Recommend Test Equipment (Table C) Pag. 25

SECTION 3

Installation Procedures Pag. 26

SECTION 4

Maintenance Procedures Pag. 28

SECTION 5

Calibration Procedure of Modules Pag. 31

APPENDIX A

Circuit Diagram, Bills of Material and Layouts Pag. 67

Wiring Diagrams Pag. 68

R.F. Power Amplifier Card Pag. 69

Low Pass Filter Pag. 74

Transformer Supply Section Pag. 78

PJ250-NV Technical and Maintenance Manual

R.V.R. Elettronica S.r.l. (Bo) Pag. 4

Switching Power Supply Pag. 81

Directional Coupler Card Pag. 85

Alarms Card Pag. 89

PJ250-NV Technical and Maintenance Manual

R.V.R. Elettronica S.r.l. (Bo) Pag. 5

PRELIMINARY INSTRUCTIONS

AND WARRANTY INFORMATION

Please observe safety precautions when handling this unit. This

equipment contains dangerous currents and high voltages.

This manual is written as a general guide for those having previous

knowledge and experience with this kind of equipment. It is not intended

to contain a complete statement of all safety warnings which should be

observed by personnel in using this or other elettronic equipment.

R.V.R. doesn't assume responsability for injury or damage resulting from

improper procedures or practices by untrained/unqualified personnel in

the handling of this unit.

Please observe all local codes and fire protection standards in the

operations of this unit.

CAUTION: always disconnect power before opening covers or removing any

part of this unit. Use appropriate grounding procedures to short out

capacitors and high voltage points before servicing.

Any damage to the goods must be reported to the carrier in writing on

the shipment receipt. Any discrepancy or damage discovered subsequent

to delivery, shall be reported to R.V.R. within five (5) days from its

receipt.

R.V.R. extends to the original end-user purchaser all original

manufacturers warranties which are transferable and all claims are to

be made directly to R.V.R. per indicated procedures.

All manufacturers warranties will be supported by R.V.R. to ensure

precise and speedy service where possible.

R.V.R. shall not be liable for any damage of whatsoever nature, arising

out of or in connection with the product or its use thereof.

R.V.R.'s warranty shall not include:

1) Re-shipment of the unit to R.V.R. for repair purposes

2) Any unauthorized repair/modification

3) Incidental/consequential damages as a result of any defect

4) Nominal non-incidental defects

5) Re-shipment costs or insurance of the unit or replacement

units/parts

Warranty shall come into force from invoice date and for the period of

the manufactures warranty.

The warranty for a period of 12 months is referred to any R.V.R. product,

while for products as transistors, Mos-Fet and tubes of the final stages

is applied the man fact re's arrant of these de ices

PJ250-NV Technical and Maintenance Manual

R.V.R. Elettronica S.r.l. (Bo) Pag. 6

To claim your rights under this warranty:

a. Contact the dealer or distributor where you prchased the unit.

Describe the problem and ask if he has an easy solution. Dealers

and Distributors are supplied with all the information about

problems that may occur and usually they can repair the unit quicker

than what the manufacturer could do. Very often installing errors

are discovered by dealers.

b. If your dealer cannot help you, contact R.V.R. in Bologna and explain

the problem. If it is decided to return the unit to the factory,

R.V.R. will mail you a regular authorization with all the necessary

instructions to send back the goods.

c. When you receive the authorization, you can return the unit. Pack

it carefully for the shipment, preferably using the original packing

and seal the package perfectly. The customer always assumes the

risks of loss (i.e., R.V.R. is never responsible for damage or loss),

until the package reaches R.V.R. premises. For this reason, we

suggest you to insure the goods for the whole value. Shipment must

be effected C.I.F. (PREPAID) to the address specified by R.V.R.'s

service manager on the authorization.

DO NOT RETURN UNITS WITHOUT OUR AUTHORIZATION AS THEY WILL BE

REFUSED.

Be sure to enclose a written technical report where mention all the

problems found and a copy of your original invoice establishing the

starting date of the warranty.

Replacement and warranty parts may be order from the following address.

Be sure to include the equipment model and serial number as well as part

description and part number.

R.V.R. Elettronica S.r.l. - Broadcasting Equipment -

Via del Fonditore, 2/2c

Zona Roveri

40138 Bologna - Italy

Telephone +39-51-6010506

Fax +39-51-6011104

R.V.R. reserves the right to modify the design and specifications of the

equipment in this manual without previous notice.

PJ250-NV Technical and Maintenance Manual

R.V.R. Elettronica S.r.l. (Bo) Pag. 7

WARNING!

The currents and voltages in this equipment are dangerous!

Personnel must at all times observe safety regulation!

This manual is intended as a general guide for trained and qualified

personnel who are aware of the dangers inherent in handling potentially

hazardous electrical and electronic circuits.

It is not intended to contain a complete statement of all safety

precautions which should be observed by personnel in using this or other

electronic equipment.

The installation, operation, maintenance and service of this equipment

involves risks both to personnel and equipment, and must be performed

only by qualified personnel exercising due care.

R.V.R. ELETTRONICA s.r.l. shall not be responsible for injury or damage

resulting from improper procedures or from the use of improperly trained

or inexperienced personnel performing such tasks.

During installation and operation of this equipment, local building codes

and fire protection standards must be observed.

WARNING!

Always disconnect power before opening covers,

doors, enclosures, gates, panels or shields.

Always use grounding sticks and short out high

voltage points before servicing. never make

internal adjustments, perform maintenance or

service when alone or when fatigued.

Do not remove, short-circuit or tamper with interlock switches on

access covers, doors, enclosures, gates, panels or shields.

Keep away from live circuits, know your equipment and don’t take

chances.

WARNING!

In case of emergency ensure that power has been disconnected

PJ250-NV Technical and Maintenance Manual

R.V.R. Elettronica S.r.l. (Bo) Pag. 8

Treatment of electrical Shock

1) If victim is not responsive follow the A-B-C's of basic life

support.

PLACE VICTIM FLAT ON HIS BACK ON A HARD SURFACE

A AIRWAY B BREATHING

IF UNCONSCIOUS, IF NOT BREATHING,

OPEN AIRWAY BEGIN ARTIFICIAL

BREATHING

LIFT UP NECK, TILT HEAD,

PUSH FOREHEAD BACK, PINCH NOSTRILS,

CLEAR OUT MOUTH IF NECESSARY, MAKE AIRTIGHT SEAL,

OBSERVE FOR BREATHING. 4 QUICK FULL BREATHS.

REMEMBER MOUTH TO MOUTH

RESUSCITATION MUST BE

COMMENCED AS SOON AS

POSSIBLE.

C CIRCULATION

CHECK CAROTID PULSE DEPRESS STERNUM 1 1/2" TO 2"

IF PULSE ABSENT, APPROX. 80 SEC. : ONE RESCUER, 15 COMPRESSIONS,

BEGIN ARTIFICIAL 2 QUICK BREATHS.

CIRCULATION

APPROX. 60 SEC. : TWO RESCUERS, 5 COMPRESSIONS,

1 BREATH

NOTE: DO NOT INTERRUPT RHYTHM OF COMPRESSIONS

WHEN SECOND PERSON IS GIVING BREATH.

Call for medical assistance as soon as possible.

2) If victim is responsive.

a. Keep them warm.

b. Keep them as quiet as possible.

c. Loosen their clothing (a reclining position is recommended).

PJ250-NV Technical and Maintenance Manual

R.V.R. Elettronica S.r.l. (Bo) Pag. 9

FIRST-AID

Personnel engaged in the installation, operation,

maintenance or servicing of this equipment are

urged to become familiar with first-aid theory and

practices. The following information is not

intended to be a complete first-aid procedure, it

is brief and is only to be used as a reference. It

is the duty of all personnel using the equipment

to be prepared to give adequate Emergency First Aid

and thereby prevent avoidable loss of life.

Treatment of electrical Burns

1) Extensive burned and broken skin.

a. Cover area with clean sheet or cloth.

(Cleanest available cloth article).

b. Do not break blisters, remove tissue, remove adhered particles

of clothing, or apply any salve or ointment.

c. Treat victim for shock as required.

d. Arrange transportation to a hospital as quickly as possible

e. If arms or legs are affected keep them elevated.

NOTE

If medical help will not be available within an hour and the victim

is conscious and not vomiting, give him a weak solution of salt and

soda: 1 level teaspoonful of salt and 1/2 level teaspoonful of baking

soda to each quart of water (neither hot or cold).

Allow victim to sip slowly about 4 ounces (half a glass) over a period

of 15 minutes.

Discontinue fluid if vomiting occurs (Do not give alcohol).

2) Less severe burns - (1st & 2nd degree)

a. Apply cool (not ice cold) compresses using the cleanest available

cloth article.

b. Do not break blisters, remove tissue, remove adhered

particles of clothing, or apply salve or ointment.

c. Apply clean dry dressing if necessary.

d. Treat victim for shock as required.

e. Arrange transportation to a hospital as quickly as possible.

f. If arms or legs are affected keep them elevated.

PJ250-NV Technical and Maintenance Manual

R.V.R. Elettronica S.r.l. (Bo) Pag. 10

CHAPTER1

GENERAL DESCRIPTION

1.1 EXTERNAL DESCRIPTION

The PJ250-NV is housed in a 3U 19" rack.

On the front panel the alarm indicators are placed in a central position,

the mains switch and the meter for the forward and reflected power.

On the rear panel the R.F. Input and R.F. Output connectors are located,

together with the interlock connectors, one of BNC type and one VDE

female, the main voltage input.

1.2 ELECTRICAL DESCRIPTION

The PJ250-NV is a power amplifier working on the 87.5-108 band with

an output power in excess of 250W and a drive level of about 20W.

This amplifier uses a RF module composed of four amplification stages

(MRF317 or SD1480), with a switching power supplies fixed with the RF

module on cooling ribs to obtain a high dissipation.

A built in low pass filter suppresses the harmonic contents below the

FCC and CCIR requirements.

A protection system protects the amplifier against thermal problems,

excessive input drive power and excessive SWR inside the amplifier or

along the feeder.

This system provides an automatic reset to initial conditions when the

problem ceases.

1.3 METERS AND INDICATORS

The forward and reflected power of the amplifier are read by the

analog multimeter (5 Fig.1) and selected by the selector (6 Fig.1) on

the front panel.

Various led (3 Fig.1) indicators indicate the alarm conditions caused

by thermal problems, excessive input drive power (4.Fig.1) and excessive

SWR.

A green indicator confirms the amplifier is operational (7 Fig.1).

1.4 PROTECTION CIRCUITS

The protection circuits put the amplifier in stand-by in the case

of a fault condition.

After 90 seconds the protection reactivates the amplifier if the fault

has disappeared.

If not, this process is repeated 4 times, at the end of which the amplifier

stays disabled for 15 min.; after 15 min, if the trouble persists, the

protection performs other four cycles and then disables the amplifier

indefinitely.

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