Axcera INNOVATOR Manuale utente

INSTRUCTION MANUAL

Innovator,

LX Series

UHF Analog

Driver/Transmitter/Translator

AXCERA, LLC

103 FREEDOM DRIVE P.O. BOX 525 LAWRENCE, PA 15055-0525 USA

(724) 873-8100 •FAX (724) 873-8105

www.axcera.com •[email protected]

UHF Analog Driver/Transmitter/Translator Table of Contents

LX Series, Rev. 3 March 2, 2005i

TABLE OF CONTENTS

CHAPTER 1 INTRODUCTION

SECTION PAGE

1.1 Manual Overview ............................................................................ 1-1

1.2 Assembly Designators ...................................................................... 1-1

1.3 Safety........................................................................................... 1-2

1.4 Contact Information.....................................................................1-2

1.5 Material Return Procedure................................................................. 1-2

1.6 Limited One Year Warranty for Axcera Products..................................... 1-3

CHAPTER 2 SYSTEM DESCRIPTION, MAINTENANCE

& REMOTE CONTROL CONNECTIONS

System Overview ........................................................................... 2-1

2.0 (Optional) Exciter Switcher Tray........................................................ 2-2

2.1 Exciter/Amplifier Chassis Assembly .................................................... 2-2

2.1.1 Receiver Module (not used in a transmitter system) ...................... 2-2

2.1.2 Modulator Module (may not be used in a translator system) ............ 2-4

2.1.3 IF Processor Module ................................................................ 2-5

2.1.4 VHF/UHF Upconverter Module ................................................... 2-7

2.1.5 Control & Monitoring/Power Supply Module .................................. 2-9

2.1.6 Exciter PA Module used in 10-100W Xmitters. or Drvrs above 2kW ..2-10

2.1.6.1 Driver Amplifier Module, used with 1kW or 2kW transmitters .2-12

2.1.7 RF Output Assemblies.............................................................2-14

2.2 Control and Status .........................................................................2-14

2.2.1 Front Panel LCD Display Screen................................................2-14

2.3 System Operation ..........................................................................2-14

2.3.1 Principles of Operation............................................................2-14

2.4 Maintenance.................................................................................2-17

2.5 Customer Remote Connections ...................................................2-17

CHAPTER 3 SITE CONSIDERATIONS, INSTALLATION AND SETUP PROCEDURES

3.1 Site Considerations.......................................................................... 3-1

3.2 Unpacking the Chassis w/Modules, bandpass and trap filters.................... 3-5

3.3 Installing the Chassis w/Modules and filters.......................................... 3-5

3.4 AC Input ....................................................................................... 3-6

3.5 Setup and Operation........................................................................ 3-7

3.5.1 Input Connections .................................................................. 3-7

3.5.2 Initial Turn On ....................................................................... 3-9

3.5.2.1 (Optional) Receiver Module LEDs on Front Panel................... 3-9

3.5.2.2 Modulator Module LEDs on Front Panel............................... 3-9

3.5.2.3 IF Processor Module LEDs on Front Panel...........................3-10

3.5.2.4 VHF/UHF Upconverter Module LEDs on Front Panel ..............3-10

3.5.2.5 Controller Module LEDs on Front Panel ..............................3-10

3.5.2.6 Power Amplifier or Driver Module LEDs on Front Panel..........3-10

3.5.3 Front Panel Screens for the (Optional) Exciter Switcher Assembly....3-10

3.5.4 Front Panel Screens for the Exciter/Amplifier Chassis Assembly ......3-13

3.5.5 Operation Procedure ..............................................................3-22

CHAPTER 4 CIRCUIT DESCRIPTIONS

4.0 (Optional) Exciter Switcher Tray (Used with dual exciter system) .............. 4-1

UHF Analog Driver/Transmitter/Translator Table of Contents

LX Series, Rev. 3 March 2, 2005ii

TABLE OF CONTENTS -(Continued)

SECTION PAGE

4.0.1 Exciter Switcher Control Board .................................................. 4-1

4.1 (Optional) Receiver Module (not used in a transmitter system) ................. 4-1

4.1.1 IF ALC Board ......................................................................... 4-1

4.1.2 UHF Mixer/PLL Board............................................................... 4-2

4.1.3 UHF Preamplifier Board............................................................ 4-2

4.2 Modulator Module (may not be used in a translator system) .................... 4-3

4.2.1 Analog Modulator Board........................................................... 4-3

4.2.1.1 Mono, Balanced Audio Input ............................................. 4-3

4.2.1.2 Stereo, Composite Audio Input ......................................... 4-3

4.2.1.3 SAP/PRO, Subcarrier Audio Input...................................... 4-3

4.2.1.4 Audio Modulation of the 3.4 MHz VCO ................................ 4-4

4.2.1.5 Phase Lock Loop (PLL) Circuit ........................................... 4-4

4.2.1.6 Main Video Signal Path (Part 1 of 2)................................... 4-5

4.2.1.7 Delay Equalizer Circuits................................................... 4-5

4.2.1.8 Sync Tip Clamp Circuit .................................................... 4-5

4.2.1.9 Main Video Signal Path (Part 2 of 2)................................... 4-6

4.2.1.10 45.75 MHz Oven Oscillator Circuit .................................... 4-6

4.2.1.11 Visual Modulator Circuit ................................................. 4-7

4.2.1.12 Aural Modulator Circuit .................................................. 4-7

4.2.1.13 Combining the 45.75 MHz & 41.25 MHz IF Signals .............. 4-7

4.2.1.14 Voltage Requirements................................................... 4-8

4.3 IF Processor Module......................................................................... 4-8

4.3.1 IF Processor Board.................................................................. 4-8

4.3.1.1 Modulator Selected......................................................... 4-8

4.3.1.2 External Modulated IF Selected......................................... 4-8

4.3.1.3 Main IF Signal Path (Part 1 of 3) ....................................... 4-9

4.3.1.4 Input Level Detector Circuit.............................................. 4-9

4.3.1.5 Pin-Diode Attenuator Circuit............................................4-10

4.3.1.6 Main IF Signal Path (Part 2 of 3) ......................................4-11

4.3.1.7 Amplitude and Phase Pre-Correction Circuits.......................4-11

4.3.1.8 Main IF Signal Path (Part 3 of 3) ......................................4-12

4.3.1.9 ALC Circuit...................................................................4-12

4.3.1.10 Fault Command ..........................................................4-13

4.3.1.11 ±12 VDC needed to operate Board..................................4-13

4.4 VHF/UHF Upconverter Module...........................................................4-14

4.4.1 Downconverter Board.............................................................4-14

4.4.2 L-Band PLL Board ..................................................................4-14

4.4.3 First Conversion Board............................................................4-14

4.4.4 Upconverter Control Board ......................................................4-15

4.5 Control Monitoring/Power Supply Module ............................................4-16

4.5.1 Power Protection Board...........................................................4-16

4.5.1.1 +12 VDC Circuits..........................................................4-16

4.5.1.2 -12 VDC Circuits...........................................................4-16

4.5.2 Control Board .......................................................................4-16

4.5.2.1 Schematic Page 1..........................................................4-17

4.5.2.2 Schematic Page 2..........................................................4-17

4.5.2.3 Schematic Page 3..........................................................4-18

4.5.2.4 Schematic Page 4..........................................................4-18

4.5.2.5 Schematic Page 5..........................................................4-18

4.5.3 Switch Board ........................................................................4-19

4.5.4 Switching Power Supply Assembly ............................................4-19

UHF Analog Driver/Transmitter/Translator Table of Contents

LX Series, Rev. 3 March 2, 2005iii

TABLE OF CONTENTS -(Continued)

SECTION PAGE

4.6 Exciter PA Module used in 10-100Watt Xmitters. or Drivers above 2kW .....4-19

4.6.1 1 Watt Amplifier Module Assembly ............................................4-20

4.6.2 1 Watt UHF Amplifier Board .....................................................4-20

4.6.3 40 Watt UHF Amplifier Assembly...............................................4-20

4.6.4 UHF Module Assembly, RF Module Pallet.....................................4-21

4.6.5 Coupler Board Assembly .........................................................4-21

4.6.6 Amplifier Control Board...........................................................4-22

4.6.6.1 Schematic Page 1..........................................................4-22

4.6.6.2 Schematic Page 2..........................................................4-22

4.6.6.3 Current Monitoring Sections of the Board ...........................4-23

4.6.6.4 Schematic Page 3 Aural, Visual. Aural Power Detectors.........4-23

4.6.7 Bandpass and Trap Filters .......................................................4-24

OR 4.7 Driver Amplifier Module Assembly used in 1kW or 2kW transmitters ....4-24

4.7.1 1-Watt Amplifier Module Assembly ............................................4-24

4.7.2 1-Watt UHF Amplifier Board.....................................................4-24

4.7.3 40 Watt UHF Amplifier Assembly...............................................4-26

OR 4.7.3.1 250 Watt UHF Amplifier Assembly................................4-26

4.7.4 Coupler Board Assembly .........................................................4-26

4.7.5 Amplifier Control Board...........................................................4-26

4.7.5.1 Schematic Page 1..........................................................4-27

4.7.5.2 Schematic Page 2..........................................................4-27

4.7.5.3 Current Monitoring Sections of the Board ...........................4-28

4.7.5.4 Schematic Page 3 Aural, Visual. Aural Power Detectors.........4-28

CHAPTER 5 DETAILED ALIGNMENT PROCEDURES

5.1 Module Replacement........................................................................ 5-1

5.1.1 Initial Test Setup.................................................................... 5-1

5.2 LX Series Exciter/Amplifier Chassis Assembly........................................ 5-2

5.2.1 (Optional) Receiver Module Assembly ......................................... 5-2

5.2.2 Modulator Module Assembly...................................................... 5-2

5.2.3 IF Processor Module Assembly .................................................. 5-3

5.2.4 VHF/UHF Upconverter Assembly ................................................ 5-4

5.2.5 Setting up the Drive Level of the Transmitter Procedure ................. 5-4

5.2.6 Changing the Transmitter Channel Procedure ............................... 5-4

5.2.7 Linearity Correction Adjustment ................................................ 5-5

5.2.8 Frequency Response Delay Equalization Adjustment ...................... 5-6

5.2.9 Calibration of Output Power & Reflected Power of Transmitter ......... 5-6

5.3 Bandpass Filter Assembly ................................................................. 5-7

5.4 UHF Trap Filter Assembly .................................................................. 5-8

5.4.1 Effects of Tuning the Output Trap Filter....................................... 5-9

APPENDICES

APPENDIX A LX SERIES SPECIFICATIONS

APPENDIX B LX SERIES DRAWINGS AND PARTS LISTS

APPENDIX C TRANSMITTER LOG SHEET

UHF Analog Driver/Transmitter/Translator Table of Contents

LX Series, Rev. 3 iv

LIST OF FIGURES

FIGURE PAGE

1-1Brady Marker Identification Drawing............................................. 1-1

2-1Exciter/Driver Chassis Assembly Front View................................... 2-1

2-2Exciter/Driver Chassis Assembly Rear View...................................2-18

3-11 kW Minimum Ventilation Configuration ....................................... 3-4

3-2Front and Rear View Reconnection Drawings .................................. 3-5

3-3Ac Input Box Assembly .............................................................. 3-7

3-4Rear View of LX Series Analog Transmitter .................................... 3-8

4-140 Watt UHF Amplifier Module....................................................4-21

4-2250 Watt UHF Amplifier Module ..................................................4-21

4-340 Watt UHF Amplifier Module....................................................4-25

4-2250 Watt UHF Amplifier Module ..................................................4-25

5-1Typical Red Field Spectrum......................................................... 5-5

5-2Bandpass Filter........................................................................ 5-8

UHF Analog Driver/Transmitter/Translator Table of Contents

LX Series, Rev. 3 v

LIST OF TABLES

TABLE PAGE

2-1LX Series Trays and Assemblies................................................... 2-1

2-2Receiver Front Panel Switch........................................................ 2-3

2-3Receiver Front Panel Status Indicators.......................................... 2-3

2-4Receiver Front Panel Control Adjustments ..................................... 2-3

2-5Receiver Front Panel Samples ..................................................... 2-3

2-6Modulator Front Panel Switch...................................................... 2-4

2-7Modulator Front Panel Status Indicators ........................................ 2-4

2-8Modulator Front Panel Control Adjustments.................................... 2-5

2-9Modulator Front Panel Sample..................................................... 2-5

2-10 IF Processor Front Panel Switch................................................... 2-6

2-11 IF Processor Front Panel Status Indicators ..................................... 2-6

2-12 IF Processor Front Panel Control Adjustments................................. 2-7

2-13 IF Processor Front Panel Sample.................................................. 2-7

2-14 VHF/UHF Upconverter Front Panel Switch...................................... 2-8

2-15 VHF/UHF Upconverter Front Panel Status Indicators ........................ 2-8

2-16 VHF/UHF Upconverter Front Panel Control Adjustments.................... 2-8

2-17 VHF/UHF Upconverter Front Panel Samples.................................... 2-8

2-18 Controller/Power Supply Front Panel Display .................................. 2-9

2-19 Controller/Power Supply Front Panel Status Indicators ..................... 2-9

2-20 Controller/Power Supply Front Panel Control Adjustments................. 2-9

2-21 Power Amplifier Front Panel Status Indicators................................2-11

2-22 Power Amplifier Front Panel Control Adjustments...........................2-11

2-23 Power Amplifier Front Panel Sample ............................................2-11

2-24 Driver Amplifier Front Panel Status Indicators................................2-13

2-25 Driver Amplifier Front Panel Control Adjustments...........................2-13

2-26 Driver Amplifier Front Panel Sample ............................................2-13

2-27 UHF Television Frequencies .......................................................2-16

2-28 LX Series Chassis Customer Remote Connections...................2-18

3-1LX Series Transmitters AC Input and Current Requirements.............. 3-1

3-2LX Series Transmitters AC Input and Current Requirements.............. 3-6

3-3Rear Chassis Connections for LX Series Analog Transmitters ............. 3-8

(Optional) Exciter Switcher Menu Screens....................................................3-11

3-4Exciter Switcher Menu 01 Splash Screen #1 .................................3-11

3-5Menu 02 Splash Screen #2........................................................3-11

3-6Menu 03 Exciter Switcher Control Screen, Automatic Operation.......3-11

3-7Menu 04 Exciter Switcher Control Screen, Manual Operation...........3-11

3-8Menu 05 Exciter Switcher Control Screen, Amps On Line................3-11

3-9Menu 06 Exciter Switcher Control Screen, Cancel Auto Back up.......3-12

3-10 Menu 07 Exciter Switcher Control Screen, B Back up to A...............3-12

3-11 Menu 08 Exciter Switcher Control Screen, back up Changeover.......3-12

3-12 Menu 09 Exciter Switcher Control Screen, Ext Amp Status..............3-12

3-13 Menu 10 Exciter Switcher Control Screen, Ext Amp Status..............3-12

LX System Controller Menu Screens .............................................................3-13

3-14 Menu 01 Splash Screen #1........................................................3-13

3-15 Menu 02 Splash Screen #2........................................................3-13

3-16 Menu 10 Main Screen ..............................................................3-13

3-17 Menu 11 Error List Access Screen...............................................3-14

3-18 Menu 12 Transmitter Device Data Access Screen ..........................3-14

3-19 Menu 13 Transmitter Configuration Access Screen ........................3-14

UHF Analog Driver/Transmitter/Translator Table of Contents

LX Series, Rev. 3 vi

LIST OF TABLES –(Continued)

TABLE PAGE

3-20 Menu 20 Error List Display Screen..............................................3-14

3-21 Menu 30 Transmitter Device Details Screen .................................3-15

3-22 Menu 30-1 System Details Screens ............................................3-15

3-23 Transmitter Device Parameters Detail Screens .............................3-15

3-24 Menu 40 Authorized Personnel Screen ........................................3-16

3-25 Menu 40-1 Transmitter Set Up: Power Raise/Lower Screen.............3-17

3-26 Menu 40-2 Transmitter Set Up: Model Select Screen .....................3-17

3-27 Menu 40-3 Transmitter Set Up: Receiver Channel Configuration......3-18

3-28 Menu 40-4 Transmitter Set Up: Upconverter Channel Select Screen.3-18

3-29 Menu 40-5 Transmitter Set Up: Serial Address Screen...................3-18

3-30 Menu 40-6 Transmitter Set Up: Station ID Screen..........................3-18

3-31 Menu 40-7 Transmitter Set Up: System Visual Power Cal. Screen......3-19

3-32 Menu 40-8 Transmitter Set Up: System Aural Power Cal. Screen.......3-19

3-33 Menu 40-9 Transmitter Set Up: System Rfltd. Power Cal. Screen ......3-19

3-34 Menu 40-10 Transmitter Set Up: Modulated Output Cal. Screen........3-19

3-35 Menu 40-11 Transmitter Set Up: Aural Deviation Screen .................3-20

3-36 Menu 40-12 Transmitter Set Up: Fwrd Pwr Fault Threshold Screen....3-20

3-37 Menu 40-13 Transmitter Set Up: Refl Power Fault Threshold Screen ..3-20

3-38 Menu 40-14 Transmitter Set Up: DLC Control Screen......................3-20

3-39 Menu 40-15 Transmitter Set Up: Auto Standby Control Screen.........3-21

3-40 Menu 40-16 Transmitter Set Up: Receiver ALC Fault Set Up Screen...3-21

3-41 Menu 40-17 Transmitter Set Up: Inner Loop Gain Control Screen......3-21

3-42 Menu 40-18 Transmitter Set Up: Optional System Control Screen .....3-21

3-43 Menu 40-19 Transmitter Set Up: Remote Command Control Screen...3-22

5-1Typical Bandpass Values ............................................................ 5-7

UHF Analog Driver/Transmitter/Translator Chapter 1, Introduction

LX Series, Rev. 3 1-1

Chapter 1

Introduction

1.1 Manual Overview

This manual explains the installation,

setup, alignment, and maintenance

procedures for the Innovator LX Series

UHF analog modular driver/transmitter/

translator. It is important that you read

all of the instructions, especially the

safety information in this chapter, before

you begin to install or operate the unit.

This instruction manual is divided into

five chapters and supporting appendices.

Chapter 1, Introduction, contains

information on the assembly numbering

system used in the manual, safety,

contact information, return procedures,

and warranties. Chapter 2, System

Description, Maintenance & Remote

Control Connections, describes the

driver/transmitter/translator and includes

discussions on system control and status

indicators, maintenance, and remote

control connections. Chapter 3,Site

Considerations, Installation and Setup

Procedures, explains how to unpack,

install, setup, and operate the

driver/transmitter/translator. Chapter

4,Circuit Descriptions,contains circuit

level descriptions for boards and board

level components in the

driver/transmitter/translator. Chapter

5, Detailed Alignment Procedures,

provides information on adjusting the

system assemblies for optimal operation.

Appendix A contains system

specifications. Appendix B contains

drawings and parts lists. Appendix C

contains a transmitter log sheet.

1.2 Assembly Designators

Axcera has assigned assembly numbers,

Ax designations such as A1, where

x=1,2,3…etc, to all assemblies, modules,

and boards in the system. These

designations are referenced in the text of

this manual and shown on the block

diagrams and interconnect drawings

provided in the appendices. The Block

Diagrams, Interconnects, Schematics,

Assembly Drawings and Parts Lists are

arranged in increasing numerical order in

the appendices. Section titles in the text

for assembly or module descriptions or

alignment procedures contain the

associated part number(s) and the

relevant appendix that contains the

drawings for that item.

The cables that connect between the

boards within a tray or assembly and

that connect between the trays, racks

and cabinets are labeled using Brady

markers.

Figure 1-1 is an example of a Brady

marked cable. There may be as few as

two or as many as four Markers on any

one cable. These Brady markers are

read starting furthest from the

connector. If there are four Brady

Markers, this marker is the transmitter

number such as transmitter 1 or

Transmitter 2. The next or the furthest

Brady Marker is the rack or cabinet

number on an interconnect cable or the

board number within a tray. The next

number on an interconnect cable is the

Tray location or number. The Brady

marker closest to the connector is the

Jack or Connector number on an

interconnect cable or the jack or

connector number on the board within a

tray.

Figure 1-1 Brady Marker Identification Drawing

UHF Analog Driver/Transmitter/Translator Chapter 1, Introduction

LX Series, Rev. 3 1-2

1.3 Safety

The UHF transmitter systems

manufactured by Axcera are designed to

be easy to use and repair while providing

protection from electrical and mechanical

hazards. Please review the following

warnings and familiarize yourself with the

operation and servicing procedures

before working on the transmitter

system.

Read All safety Instructions –All of

the safety instructions should be read

and understood before operating this

equipment.

Retain Manuals –The manuals for the

transmitter should be retained at the

transmitter site for future reference.

Axcera provides two sets of manuals for

this purpose; one set can be left at the

office while one set can be kept at the

site.

Heed all Notes, Warnings, and

Cautions –All of the notes, warnings,

and cautions listed in this safety section

and throughout the manual must be

followed.

Follow Operating Instructions –All of

the operating and use instructions for the

transmitter should be followed.

Cleaning –Unplug or otherwise

disconnect all power from the equipment

before cleaning. Do not use liquid or

aerosol cleaners. Use a damp cloth for

cleaning.

Ventilation –Openings in the cabinet

and module front panels are provided for

ventilation. To ensure the reliable

operation of the driver/transmitter, and

to protect the unit from overheating,

these openings must not be blocked.

Servicing –Do not attempt to service

this product yourself until becoming

familiar with the equipment. If in doubt,

refer all servicing questions to qualified

Axcera service personnel.

Replacement Parts –When

replacement parts are used, be sure that

the parts have the same functional and

performance characteristics as the

original part. Unauthorized substitutions

may result in fire, electric shock, or other

hazards. Please contact the Axcera

Technical Service Department if you have

any questions regarding service or

replacement parts.

1.4 Contact Information

The Axcera Field Service Department can

be contacted by phone at (724) 873-

8100 or by fax at (724) 873-8105.

Before calling Axcera, please be prepared

to supply the Axcera technician with

answers to the following questions. This

will save time and help ensure the most

direct resolution to the problem.

1. What are the Customers’ Name

and call letters?

2. What are the model number and

type of transmitter?

3. Is the transmitter digital or

analog?

4. How long has the transmitter

been on the air? (Approximately

when was the transmitter

installed.)

5. What are the symptoms being

exhibited by the transmitter?

Include the current control/power

supply LCD readings and the

status of LEDs on the front

panels of the modules. If

possible, include the

control/power supply LCD

readings before the problem

occurred.

1.5 Material Return Procedure

To insure the efficient handling of

equipment or components that have been

returned for repair, Axcera requests that

each returned item be accompanied by a

Material Return Authorization Number

(MRA#).

UHF Analog Driver/Transmitter/Translator Chapter 1, Introduction

LX Series, Rev. 3 1-3

The MRA# can be obtained from any

Axcera Field Service Engineer by

contacting the Axcera Field Service

Department at (724) 873-8100 or by fax

at (724) 873-8105. This procedure

applies to all items sent to the Field

Service Department regardless of

whether the item was originally

manufactured by Axcera.

When equipment is sent to the field on

loan, an MRA# is included with the unit.

The MRA# is intended to be used when

the unit is returned to Axcera. In

addition, all shipping material should be

retained for the return of the unit to

Axcera.

Replacement assemblies are also sent

with an MRA# to allow for the proper

routing of the exchanged hardware.

Failure to close out this type of MRA# will

normally result in the customer being

invoiced for the value of the loaner item

or the exchanged assembly.

When shipping an item to Axcera, please

include the MRA# on the packing list and

on the shipping container. The packing

slip should also include contact

information and a brief description of why

the unit is being returned.

Please forward all MRA items to:

AXCERA, LLC

103 Freedom Drive

P.O. Box 525

Lawrence, PA 15055-0525 USA

For more information concerning this

procedure, call the Axcera Field Service

Department @ (724) 873-8100.

Axcera can also be contacted through e-

mail at [email protected] and on the

Web at www.axcera.com.

1.6 Limited One Year Warranty for

Axcera Products

Axcera warrants each new product that

it has manufactured and sold against

defects in material and workmanship

under normal use and service for a

period of one (1) year from the date of

shipment from Axcera's plant, when

operated in accordance with Axcera's

operating instructions. This warranty

shall not apply to tubes, fuses,

batteries, bulbs or LEDs.

Warranties are valid only when and if

(a) Axcera receives prompt written

notice of breach within the period of

warranty, (b) the defective product is

properly packed and returned by the

buyer (transportation and insurance

prepaid), and (c) Axcera determines, in

its sole judgment, that the product is

defective and not subject to any misuse,

neglect, improper installation,

negligence, accident, or (unless

authorized in writing by Axcera) repair

or alteration. Axcera's exclusive liability

for any personal and/or property

damage (including direct, consequential,

or incidental) caused by the breach of

any or all warranties, shall be limited to

the following: (a) repairing or replacing

(in Axcera's sole discretion) any

defective parts free of charge (F.O.B.

Axcera’s plant) and/or (b) crediting (in

Axcera's sole discretion) all or a portion

of the purchase price to the buyer.

Equipment furnished by Axcera, but not

bearing its trade name, shall bear no

warranties other than the special hours-

of-use or other warranties extended by

or enforceable against the manufacturer

at the time of delivery to the buyer.

NO WARRANTIES, WHETHER

STATUTORY, EXPRESSED, OR

IMPLIED, AND NO WARRANTIES OF

MERCHANTABILITY, FITNESS FOR

ANY PARTICULAR PURPOSE, OR

FREEDOM FROM INFRINGEMENT,

OR THE LIKE, OTHER THAN AS

SPECIFIED IN PATENT LIABILITY

ARTICLES, AND IN THIS ARTICLE,

SHALL APPLY TO THE EQUIPMENT

FURNISHED HEREUNDER.

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