Larcan MX1UX, MX1U Users Manual

TECHNICAL MANUAL

1 WATT UHF AMPLIFIER

FOR MX1U SERIES

PUBLICATION TSM 20-312

TV TRANSMITTER/TRANSLATOR

LARCAN INC.
228 AMBASSADOR DRIVE
MISSISSAUGA, ONTARIO
CANADA L5T 2J2

PHONE: [phone]
FAX: [phone]

Rev 0: June 14, 2000

MX Series - 1 Watt UHF AMPLIFIER

Cadco M-369 Manual

Cadco P-379 Manual

Section Title Page

NOTICES, ETC. ..................................................................................................................2

SAFETY AND HEALTH WARNINGS ............................................................................. 3&4

GENERAL SERVICE INFORMATION

1) Parts Lists Explained..........................................................................................4

2) Interpreting LARCAN Drawing Numbers............................................................4

3) The LARCAN Assembly Prefix Numbering System ........................................... 5

4) List of Prefix Numbers for the 1W Amplifier .......................................................6

5) Production Changes...........................................................................................6

GENERAL DESCRIPTION

INTRODUCTION .................................................................................................................7

SPECIFICATIONS...............................................................................................................8

ABOUT THIS MANUAL .......................................................................................................9

ON SITE: First Time Start-up ............................................................................................10

PUBLICATION LIST for MX series 1W UHF Amplifier:

PUB99-92 1W UHF Amplifier Assembly:

Section Page

1. Amplifier Chassis Description...............................................................92-1

2. Pre-Amp Module ..................................................................................92-2

3. PA Module............................................................................................92-2

4. Directional Coupler...............................................................................92-3

5. RF Metering Board ...............................................................................92-3

6. Power Supply .......................................................................................92-4

7. Basic Maintenance/Replacement Parts ...............................................92-5

8. Parts List ............................................................................................92-12

LIST OF FIGURES: see PUB99-92, page 92-1 for the drawing listing.

TSM 20-312 rev 0: June 14, 2000 11W UHF Amplifier

MX Series - 1 Watt UHF AMPLIFIER

NOTICES, ETC.:

THIS EQUIPMENT USES STATIC-SENSITIVE CMOS INTEGRATED CIRCUITS. Observe proper

handling precautions (indicated in Maintenance Sections) at all times when working with this equipment.

TOXIC MATERIALS NOTICE... IMPORTANT...

Effective thermal management in certain semiconductor devices in this equipment is possible only through
the use of Beryllium Oxide ceramic materials. This equipment contains devices made with Beryllium
Oxide!

Beryllium and its compounds is a POISON if taken into the body in any manner.

To reduce your risk, remember: In case of accidental breakage of any kind of semiconductor
device, DO NOT INHALE THE DUST, and AVOID GETTING DUST IN YOUR MOUTH; it could contain
Beryllium. DO NOT LET BERYLLIUM DUST INTO YOUR BLOODSTREAM THROUGH CUTS OR
OPEN WOUNDS!

Seek and obtain IMMEDIATE medical attention if the dust enters your body in any manner.

Avoid cuts by wearing gloves while picking up the pieces. Wash your hands thoroughly after
replacing devices. Dispose of defective devices only through approved toxic waste disposal
facilities.

Remember too, after cleaning up an accidental breakage, avoid inhaling the dust while replacing or
emptying vacuum cleaner filter bags, and wash your hands well after servicing the vacuum
cleaner.

All material in this manual is copyright © LARCAN INC. and reproduction in whole or in part in any form for
any purpose other than exclusive use of the equipment owner, without prior written authorization from
LARCAN INC. is prohibited.

Trademarks are the property of their respective owners and are mentioned in the text for discussion
purposes; any such mention is not necessarily an endorsement of the trademark or its owner. Parts lists
may also contain trademarked vendor names as an aid in procurement of spare parts. We apologize for
any inadvertent omission of trademark acknowledgement; any such omission was completely accidental.

Although the following pages contain as much information about the 1W UHF Amplifier as it is reasonably
possible to provide, nevertheless we must state that these instructions do not purport to cover all details or
variations in equipment nor to provide for every possible contingency to be met in connection with its
installation, operation, or maintenance. It is assumed that fully competent technical personnel will be
responsible for the maintenance and repair of the equipment that is described in this manual. Should
further information be desired, or should particular problems arise which are not covered sufficiently herein
for the purchaser's purposes, or should replacement parts be required, the matter should be referred to us.

LARCAN INC.
228 Ambassador Drive,
Mississauga, Ontario, Canada L5T-2J2.
Telephone [phone], FAX [phone]

TSM 20-312 rev 0: June 14, 2000 21W UHF Amplifier

MX Series - 1 Watt UHF AMPLIFIER

TRANSMITTER SAFETY PRECAUTIONS:

AC VOLTAGES USED FOR THE OPERATION OF THIS EQUIPMENT ARE DANGEROUS TO HUMAN
LIFE!

This instruction manual has been written for the general guidance and information of operation,
maintenance and service personnel who are aware of, and are familiar with, the hazards of working with
high powered electronic circuits.

This manual does not purport to detail all of the safety precautions that should be observed when servicing
this or any other electronic equipment. Servicing by inadequately trained or inexperienced personnel may
expose such personnel to serious risks that could result in personal injury or death, and/or damage to this
equipment. All personnel concerned with the servicing of this equipment should be thoroughly familiar
with standard first aid procedures for the treatment of electrical burns and shock.

The equipment has been designed to protect operating personnel from accidental contact with voltages
dangerous to human life, either by means of distance (where it is necessary to deliberately reach to make
contact with live terminals) or with shielding. It is therefore of prime importance that any protective
covering devices are kept in place at all times.

While all practical safety precautions have been adopted to safeguard personnel from possible injury, in
times of off-air emergency there is often a strong tendency to act without due regard for normal caution;
for this reason, both supervisory and operating personnel are urged to ENSURE THAT THE SAFETY

RULES DETAILED BELOW ARE FOLLOWED AS AN ESTABLISHED ROUTINE at all times.

1. KILL THE AC POWER BEFORE IT KILLS YOU

Under no circumstance should any person reach within the cabinets for the purpose of servicing or
adjusting the equipment without first disconnecting the AC power, or without the immediate presence of
another person capable of rendering aid. Use of the buddy system is encouraged for transmitter work.

2. DO NOT TAMPER WITH INTERLOCKS OR SAFETY SHIELDS

Under normal circumstances no safety shield should be removed.

3. REMOVE PERSONAL JEWELRY WHEN WORKING ON THE EQUIPMENT

The 48 volt power supply in this transmitter, although overload protected, is able to deliver currents
capable of heating metallic tools or personal jewellery such as a watchband, bracelet, or ring. Accidental
short circuits from such metallic objects can cause them to heat sufficiently to result in serious personal
injury.

4. KNOW FIRST AID, AND KEEP FIRST AID SUPPLIES AVAILABLE

Illustrated first aid instructions for the treatment of electrical shock and burns should be displayed in a
prominent location adjacent to the equipment. In rendering first aid, the timeliness and effectiveness of
the treatment are vitally important to the recovery of the injured person.

Without exception, all personnel should thoroughly familiarize themselves with the procedures involved.
One person, whose regular duties place him or her at the transmitter site often, should be delegated and
given the complete responsibility and authority to ensure that first aid supplies are kept on site and
maintained fresh and up to date.

Prominently display a list of emergency telephone numbers. This list should include the telephone
numbers of the nearest ambulance, hospital, doctor, and fire department paramedics; and the public
works (highways or county roads) department in case the former persons need access to the site during
inclement weather.

TSM 20-312 rev 0: June 14, 2000 31W UHF Amplifier