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Tait T800 II Series - User Manual

Tait T800 II Series
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M800-00 1
Copyright TEL 30/04/98
T800 Series II
Ancillary Equipment
Service Manual
Issue 101
May 1998
M800-00-101

Table of Contents

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Overview

  1. General Servicing Procedures
    1. Caution: CMOS Devices
    2. Caution: Beryllium Oxide & Power Transistors
  2. Mechanical
    1. Pozidriv Recess Head Screws
    2. Disassembly/Reassembly
  3. Component Replacement
    1. Leaded Components
      1. Desoldering Iron Method
      2. Component Cutting Method
    2. Surface Mount Devices
  4. To Remove Cased Mica Capacitors
  5. Software History
    1. BASEPROG V1/PGM800 V2
    2. PGM800 V2.01 (Released 11/06/91)
    3. PGM800 V2.21 (Released 03/10/95)
    4. PGM800Win V1.00 (Released 28/06/96)
    5. PGM800Win v2.00 (Released 18/08/97)
  6. Technical Instructions
  7. Manual Structure
  8. Contact Information
  9. Copyright
  10. Updates

This document is a service manual for the Tait T800 Series II Ancillary Equipment, specifically Issue 101, published in May 1998. It provides general, technical, and servicing information for the equipment.

General Servicing Procedures

This section covers general advice and procedures for servicing the T800 Series II ancillary equipment. It emphasizes the importance of proper handling of sensitive components and provides guidelines for mechanical and component replacement tasks.

Caution: CMOS Devices

The equipment contains CMOS devices, which are highly susceptible to damage from static charges. Proper handling procedures are essential to prevent damage. The manual recommends referring to manufacturers' data books (e.g., Philips or Motorola) for detailed handling instructions.

An antistatic bench kit (IPN 937-00000-34) is available from Tait Electronics Ltd. This kit includes:

  • A conductive rubber bench mat
  • An earth lead with a 1M series resistor to connect the mat to ground
  • A wrist strap
  • An information leaflet

This setup ensures that static electricity is safely discharged, protecting the sensitive electronic components during servicing.

Caution: Beryllium Oxide & Power Transistors

Power transistors used in the equipment contain beryllium oxide. While harmless in its solid form, this substance becomes a severe health hazard if reduced to dust. Therefore, power transistors must not be broken open, mutilated, filed, machined, or physically damaged in any way that could produce dust particles. This warning highlights a critical safety consideration for technicians.

Mechanical

This section details mechanical aspects of the equipment, including the type of screws used and general instructions for disassembly and reassembly.

Pozidriv Recess Head Screws

Pozidriv recess head screws are the standard on all Tait manufactured equipment. To fully realize the advantages of this type of screw, servicing personnel must use the correct screwdrivers.

Disassembly/Reassembly

Specific instructions for disassembly and reassembly of individual equipment components are provided in the relevant parts of the manual. This modular approach allows for detailed, component-specific guidance.

Component Replacement

This section provides instructions for replacing components, differentiating between leaded components and surface mount devices (SMDs).

Leaded Components

When removing or fitting components to a Printed Circuit Board (PCB), care must be taken to avoid damaging the tracks. Two satisfactory methods for removing components from Plated Through Hole (PTH) PCBs are detailed:

Desoldering Iron Method
  1. Place the desoldering iron tip over the lead.
  2. As the solder melts, move the tip in a circular motion.
  3. Start the suction and continue the movement for 3 or 4 circles.
  4. Remove the tip while maintaining suction to ensure all solder is removed, then stop suction.
  5. Before pulling the lead out, ensure it is not stuck to the plating. If not free, resolder and try again.

Note: Desoldering irons may not have enough heat for ground plane leads. Additional heat can be applied by holding a soldering iron on the tip of the desoldering iron. Recommended desoldering stations include Philips SBC 314 or Pace MBT-100E.

Component Cutting Method
  1. Cut the leads on the component side of the PCB.
  2. Heat the solder joint sufficiently to allow easy removal of the lead from the component side without undue force.
  3. Fill the hole with solder, then clear it with solderwick.

Surface Mount Devices

Caution: Surface mount devices (SMDs) require specialized storage, handling, removal, and replacement techniques. Servicing should only be performed by approved Tait Dealers or Service Centres equipped with the necessary facilities. Improper equipment or untrained personnel can lead to permanent damage. If in doubt, contact Tait Electronics Ltd or a local Tait Branch or Subsidiary.

To Remove Cased Mica Capacitors

Cased mica capacitors can be removed by heating the top with a heavy-duty soldering iron and gently lifting the capacitor off the PCB using a solder-resistant spike or equivalent tool.

Software History

This section provides a historical overview of the programming software used for T800 Series equipment, detailing different versions and their key features.

BASEPROG V1/PGM800 V2

T800 programming software originated as BASEPROG V1 and was released as PGM800 V2.

PGM800 V2.01 (Released 11/06/91)

Major changes introduced with V2.01 include:

  • Full support for various display adaptors.
  • Programming of CTCSS frequency data (optional) for individual channels.
  • Full cursor control in edit mode.
  • User-selectable output file format (hex or binary).
  • Support for a wider range of T800 equipment.
  • DOS shell facility implemented.
  • CTCSS defeat possible when CTCSS tone is not selected.
  • Channel numbering changed from 0-127 to 1-128.
  • An "X" on printouts indicates 8 DIP switches, with the MSB state dependent on EPROM size.

Note: Data files from BASEPROG V1.0 are compatible with PGM800 V2.01.

PGM800 V2.21 (Released 03/10/95)

PGM800 V2.21 is an updated and expanded version of PGM800 V2.01, featuring many new and improved functionalities and user interface enhancements for easier data entry and editing.

Major changes:

  • Includes new radio models not programmable with PGM800 V2.01.
  • Default file names use 'dash' instead of 'underscore'.
  • Default file extension in Save File page is BIN instead of HEX.
  • Out-of-range frequencies result in warning messages but are still accepted.
  • Channel numbers are selectable between 0-127 and 1-128.
  • Automatic insertion feature for frequency input.

Note: Data files from BASEPROG V1.0 and PGM800 V2.01 are compatible with PGM800 V2.21.

PGM800Win V1.00 (Released 28/06/96)

PGM800Win V1.00 is a Windows™ driven version, differing significantly from DOS versions of PGM800. It offers many new and improved features.

Major changes:

  • Windows environment simplifies data entry and editing.
  • Includes new radio models not programmable with DOS versions of PGM800.
  • Out-of-range frequencies result in warning messages and are not accepted into the standard library module. User-defined modules can be created to allow variation.
  • Channel numbers default to 0-127 (EPROM memory locations), but users can change settings to run from 1-128.

Note: Data files from BASEPROG V1.0 and all DOS versions of PGM800 are compatible with PGM800Win V1.00.

PGM800Win v2.00 (Released 18/08/97)

PGM800Win V2.00 is an upgraded and expanded version of PGM800Win V1.0, specifically developed for T800 Series II base stations, while also supporting Series I equipment.

Major changes:

  • Windows environment enhances data entry and editing.
  • Includes new radio models not programmable with DOS versions of PGM800.
  • Out-of-range frequencies result in warning messages and are not accepted into the standard library module. User-defined modules can be created to allow variation.
  • Channel numbers default to 0-127 (EPROM memory locations), but users can change settings to run from 1-128.
  • Ability to program T800 Series II base station modules via serial communications.
  • Deviation and reference modulation settings are automatically written to the radio.
  • Extra information not stored in the radio (e.g., note field, auxiliary pin names) can be saved to a disk file.

Note: Data files from BASEPROG V1.0, all DOS versions of PGM800, and PGM800Win V1.0 are compatible with PGM800Win V2.00.

Technical Instructions

This section explains the role of Technical Instructions (TIs) issued by Tait Electronics.

From time to time, TIs are issued by the Radio Infrastructure Engineering Division of Tait Electronics. These TIs are used to update equipment or information, or to meet specific operational requirements. TIs applicable to specific T800 Series ancillary equipment are listed in the relevant part of this manual.

Manual Structure

The manual is divided into three main parts:

  • Part A: General Servicing Procedures - Covers general servicing information.
  • Part B: T807/808 Switching Power Supply - Specific information for the T807/808 power supply.
  • Part C: T800-22-0000 Base Station/Repeater Rack Frame - Specific information for the T800-22-0000 rack frame.

Each part and/or section includes a detailed table of contents. The manual uses a revision control system where each page has an issue date, and changes are marked by a vertical line in the outer margin. Deleted paragraphs are indicated by an arrow and a number. The manual's issue and revision status are indicated by the last three digits of the IPN (e.g., 103 for the third revision to issue 1). PCB information is provided for all current and previous issue PCBs, grouped by PCB.

Contact Information

For errors or suggestions regarding the manual, contact the Technical Writer, Tait Radio Systems Division, Tait Electronics Ltd, P.O. Box 1645, Christchurch, New Zealand. For technical assistance with the equipment, contact an approved Tait Dealer or Service Centre, or the Customer Support Group, Radio Systems Division, Tait Electronics Ltd, Christchurch, New Zealand. When ordering service manuals, quote the Tait Internal Part Number (IPN) and version.

All information in this manual is the property of Tait Electronics Ltd. All rights are reserved. No part of the manual may be copied, photocopied, reproduced, translated, stored, or reduced to any electronic or machine-readable form without prior written permission from Tait Electronics Ltd.

Updates

Tait Electronics Ltd reserves the right to update equipment and/or manuals without prior notice to improve performance, reliability, or servicing.

Tait T800 II Series Specifications

General IconGeneral
BrandTait
ModelT800 II Series
CategoryPower Supply
LanguageEnglish

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