T800/T800 SERIES 2 MANUALS/Paging/M830P 00 1A0/Section A Introduction To Servicing Section

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M830P-00 1

T830 Series II Paging

Base Station Equipment

148-174MHz

Initial Adjustment Manual

July 2000

M830P-00-1A0

2M830P-00

01/07/00 Copyright TEL

Head Office

New Zealand

Tait Electronics Ltd

558 Wairakei Road

P.O. Box 1645

Christchurch

New Zealand

Phone: 64 3 358-3399

Fax: 64 3 358-3636

Radio Systems Division

535 Wairakei Road

P.O. Box 1645

Christchurch

New Zealand

Phone: 64 3 358-3399

Fax: 64 3 358-2825

Australia

Tait Electronics (Aust) Pty Ltd

186 Granite Street

Geebung

Queensland 4034

P. O . B o x 6 7 9

Virginia

Queensland 4014

Australia

Phone: 61 7 3865-7799

Toll Free: 1800 077-112

Fax: 61 7 3865-7990

Beijing

Tait Mobile Radio (HK) Ltd

Beijing Representative Office

Room 812, Tower A

Beijing Bright China

Chang An Building

No. 7 Jianguomennei Dai Jei

Dongcheng District

Beijing

China 100005

Canada

Tait Mobile Radio Inc.

Unit 5, 158 Anderson Avenue

Markham

Ontario L6E1A9

Canada

Phone: 1 905 472-1100

Toll Free: 1 800 890-8248

Fax: 1 905 472-5300

France

Tait France Sarl

2 Avenue de la Cristallerie

92 316 Sèvres, Cedex

France

Phone: 33 1 41 14-05-50

Fax: 33 1 41 14-05-55

Germany

Tait Mobilfunk GmbH

Willstätterstraße 50

D-90449 Nürnberg 60

Germany

Phone: 49 911 96 746-0

Fax: 49 911 96 746-79

Hong Kong

Tait Mobile Radio (HK) Ltd

Unit 2216, North Tower

Concordia Plaza

1, Science Museum Road

Tsim Sha Tsui East

Kowloon

Phone: 852 2369-3040

Fax: 852 2369-3009

New Zealand

Tait Communications Ltd

Unit 4, 75 Blenheim Road

P. O . B o x 11 8 5

Christchurch

Phone: 64 3 348-3301

Fax: 64 3 343-0558

Singapore

Tait Electronics (Far East) Pte

Ltd

4 Leng Kee Road

SIS Building #05-11A

Singapore 159088

Phone: 65 471-2688

Fax: 65 479-7778

Ta i w a n

Tait Mobile (Taiwan) Ltd

1104, No. 142 Chung Hsiao E. Rd

Sec. 4

Taipei

Taiwan

Phone: 886 2 2731-1290

Fax: 886 2 2711-6351

Thailand

Tait Mobile Radio Ltd

14/1 Suwan Tower

Third Floor

Soi Saladaeng 1

North Sathorn Road

Bangrak

Bangkok 10500

Thailand

Phone: 662 267-6290

Fax: 662 267-6293

United Kingdom

Tait Europe Ltd

Ermine Business Park

Ermine Road

Huntingdon

Cambridgeshire PE18 6YA

United Kingdom

Phone: 44 1480-52255

Fax: 44 1480-411996

USA

Tait Electronics (USA) Inc.

9434 Old Katy Road

Suite 110

Houston

Texas 77055

USA

Phone: 1 713 984-8684

Toll Free: 1 800 222-1255

Fax: 1 713 468-6944

Internet

http://www.taitworld.com

T800

M830P-00 3

About This Manual

Scope This manual contains general, technical, tuning and adjustment

information on T830 Series II 50W and 100W paging base sta-

tions which comprise the following equipment:

PCB Information PCB information is provided for all current issue PCBs, as well

as all previous issue PCBs manufactured in production quanti-

ties, and is grouped according to PCB. Thus, you will find the

parts list, grid reference index (if necessary), PCB layouts and

circuit diagram(s) for each individual PCB grouped together.

Errors If you find an error in this manual, or have a suggestion on how

it might be improved, please do not hesitate to contact Customer

Support, Tait Electronics Ltd, Christchurch, New Zealand (full

contact details are on page 2).

Updating Equipment And Manuals

In the interests of improving performance, reliability or servicing, Tait Electronics Ltd

reserve the right to update their equipment and/or manuals without prior notice.

All information contained in this manual is the property of Tait Electronics Ltd. All

rights are reserved. This manual may not, in whole or part, be copied, photocopied,

reproduced, translated stored or reduced to any electronic medium or machine readable

form without prior written permission from Tait Electronics Ltd.

Ordering Tait Service Manuals

You can order additional copies of this manual from your nearest Tait Dealer or Cus-

tomer Service Organisation. When ordering, make sure you quote the correct Tait prod-

uct code ("M" number). Note that only the latest issue of the manual will be available

for order.

50W base station T837 paging exciter

T838 50W power amplifier

100W base station T837 paging exciter

T839 100W power amplifier

4M830P-00

01/07/00 Copyright TEL

Table Of Contents

This manual is divided into eight parts as listed below, with each part being further sub-

divided into sections. There is a detailed table of contents at the start of each part and/

or section.

Part Title

A Introduction To Servicing

B T835 Receiver - not used in this manual

C T837 Paging Exciter

D T838 & T839 Power Amplifiers

E T830 VCO PCB Information

F Installation

G T800-28-0X00 Paging Rack Frame

H T800 Ancillary Equipment

M830P-00 AI

Part A Introduction To Servicing

This part of the manual is divided into the sections listed below. These sections provide

some general and advisory information on servicing procedures, and a brief history of

PGM800Win programming software.

Section Title Page

1.1

1.2

1.3

1.4

General

Additional Technical Information

Caution: CMOS Devices

Caution: Aerial Load

Caution: Beryllium Oxide & Power Transistors

1.1

1.2

2.1

2.2

2.3

2.3.1

2.3.2

2.4

2.5

Mechanical

Torx Recess Head Screws

Pozidriv & Philips Recess Head Screws

Disassembly/Reassembly

Exciters

Power Amplifiers

Cover Screw Torques

Chassis & Cover Compatibility

2.1

2.2

2.3

2.4

3.1

3.1.1

3.1.2

3.2

3.3

Component Replacement

Leaded Components

Desoldering Iron Method

Component Cutting Method

Surface Mount Devices

Cased Mica Capacitors

3.1

3.2

4.1

4.2

Software History

PGM800Win V1.0

PGM800Win V2.00

4.1

Figure Title Page

1.1

1.2

2.1

2.2

2.3

Typical Product Code & Serial Number Labels

Typical Anti-static Bench Set-up

Torx Screw Identification

Pozidriv & Philips Screw & Screwdriver Identification

Identification Of New-Design Chassis & Covers

1.1

1.2

2.1

2.2

2.4

AII M830P-00

01/07/00 Copyright TEL

M830P-00 General A1.1

1 General

1.1 Additional Technical Information

If you have any questions about this manual or the equipment it describes, please con-

tact your nearest Tait Dealer or Customer Service Organisation. If necessary, you can get

additional technical help from Customer Support, Tait Electronics Ltd, Christchurch,

New Zealand (full contact details are on page 2).

When requesting information, please quote either the manual product code (e.g.

M830P-00-1TA), or the equipment product code and serial number which are printed on

a label on the back of the product (as shown in Figure 1.1).

Figure 1.1 Typical Product Code & Serial Number Labels

If you require information about a particular PCB, please quote the full PCB internal

part number (IPN) which is screen printed onto the top side of the board (refer to the

appropriate PCB Information section in this manual for more details).

1.2 Caution: CMOS Devices

This equipment contains CMOS Devices which are susceptible to damage from static

charges. Care when handling these devices is essential. For correct handling proce-

dures refer to the manufacturers' data books, e.g. Philips data books covering CMOS

devices, or Motorola CMOS data books, Section 5 'Handling', etc.

An anti-static bench kit (refer to Figure 1.2) is available from Tait Electronics Ltd under

the following product codes:

• KS0001 - 1 conductive rubber bench mat

- 1 earth lead to connect the mat to ground

• KS0004 - 1 wrist strap.

this area used for regional

Type Approval information

product code

serial number

T835-10-0000 Rev 1

900000

Tait Electronics Limited

Made in New Zealand

T838-10-0000

Rev 1

900000

Tait Electronics Limited

Made in New Zealand

A1.2 General M830P-00

01/07/00 Copyright TEL

Figure 1.2 Typical Anti-static Bench Set-up

1.3 Caution: Aerial Load

The equipment has been designed to operate safely under a wide range of aerial loading

conditions. However, we strongly recommend that the transmitter should always be

operated with a suitable load to prevent damage to the transmitter output power stage.

1.4 Caution: Beryllium Oxide & Power Transistors

The RF power transistors in current use all contain some beryllium oxide. This sub-

stance, while perfectly harmless in its normal solid form, can become a severe health

hazard when it has been reduced to dust. For this reason the RF power transistors

should not be broken open, mutilated, filed, machined, or physically damaged in any

way that can produce dust particles.

to building earth

(not mains earth)

conductive

wrist strap conductive rubber

bench mat

M830P-00 Mechanical A2.1

2 Mechanical

2.1 Torx Recess Head Screws

Torx recess head screws are becoming the standard screw head type in all T800 Series II

equipment, with Pozidriv and Philips recess head screws being used in fewer applica-

tions.

The Torx recess head has the advantage of improved screwdriver tip location, reducing

the chances of screw head damage caused by the driver tip rotating within the recess. In

addition, using a ball-tip Torx screwdriver allows you to drive a Torx head screw with

the driver on a slight angle, which can be useful in situations where access is restricted.

It is important that you use the correct Torx screwdriver tip:

M3 screws - T10

M4 screws - T20.

Figure 2.1 below shows a typical Torx recess head screw (actual hardware may differ

slightly from this illustration due to variations in manufacturing techniques).

Figure 2.1 Torx Screw Identification

"star" shaped recess with

six internal notches

A2.2 Mechanical M830P-00

01/07/00 Copyright TEL

2.2 Pozidriv & Philips Recess Head Screws

Pozidriv and Philips recess head screws will continue to be used in T800 Series II equip-

ment in a few special applications. It is important that you use the correct type and size

screwdriver for each screw type to avoid damaging the screw head.

It is particularly important that you do not use Philips screwdrivers on Pozidriv screw

heads as the tapered driving flutes of the Philips screwdriver do not engage correctly

with the parallel-sided slots in the Pozidriv screw head. This can result in considerable

damage to the screw head if the screwdriver tip turns inside the recess.

Note: If you find you need excessive downwards pressure to keep the screwdriver

tip in the Pozidriv screw head, you are probably using the wrong type and/

or size screwdriver.

Figure 2.2 below shows the main differences between typical Pozidriv and Philips screw

heads and screwdriver tips (actual hardware may differ slightly from these illustrations

due to variations in manufacturing techniques).

Figure 2.2 Pozidriv & Philips Screw & Screwdriver Identification

driving flutes with

parallel sides

driving flutes with

tapered sides

Pozidriv Philips

internal notches

"star" markings

between slots

no special markings

slots with parallel sides

slots with tapered sides

ridges between

driving flutes

M830P-00 Mechanical A2.3

2.3 Disassembly/Reassembly

2.3.1 Exciters

To carry out alignment or change option links, you need to remove only the top cover,

i.e. the one adjacent to the front panel handle and on the opposite side to the main

D-range connector (D-range 1/PL100).

You need to remove the bottom cover to access:

•Q370

• solder link SL501 (fast key option).

2.3.2 Power Amplifiers

You should carry out the tuning and power output level setting procedures with the

cover on.

2.4 Cover Screw Torques

Exciters .. 1.36Nm/12in.lbf.

Power Amplifiers .. 0.9Nm/in.lbf.

A2.4 Mechanical M830P-00

01/07/00 Copyright TEL

2.5 Chassis & Cover Compatibility

The chassis and covers used in T800 Series II modules incorporate a number of design

changes to improve Electro-Magnetic Compatibility (EMC) performance. It is impor-

tant that only the new-design covers are fitted to the new chassis to ensure correct

mechanical fit and continued compliance with appropriate EMC Type Approval regula-

tions.

Figure 2.3 below shows some of the main features which can be used to identify the

new-design chassis and covers.

Figure 2.3 Identification Of New-Design Chassis & Covers

Top Cover

Bottom Cover

Chassis

4 holes in

rear panel

loom channel in

top of walls

groove in top

of rear wall

ridge on top

of rear wall

provision for mounting speaker

(future development)

additional walls

←To p V iew Rear View→

M830P-00 Component Replacement A3.1

3 Component Replacement

3.1 Leaded Components

Whenever you are doing any work on the PCB that involves removing or fitting compo-

nents, you must take care not to damage the copper tracks. The two satisfactory meth-

ods of removing components from plated-through hole (PTH) PCBs are detailed below.

Note: The first method requires the use of a desoldering station, e.g. Philips SBC

314 or Pace MBT-100E.

3.1.1 Desoldering Iron Method

Place the tip over the lead and, as the solder starts to melt, move the tip in a circu-

lar motion.

Start the suction and continue the movement until 3 or 4 circles have been com-

pleted.

Remove the tip while continuing suction to ensure that all solder is removed from

the joint, then stop the suction.

Before pulling the lead out, ensure it is not stuck to the plating.

If the lead is still not free, resolder the joint and try again.

Note: The desoldering iron does not usually have enough heat to desolder leads

from the ground plane. Additional heat may be applied by holding a sol-

dering iron on the tip of the desoldering iron (this may require some addi-

tional help).

3.1.2 Component Cutting Method

Cut the leads on the component side of the PCB.

Heat the solder joint sufficiently to allow easy removal of the lead by drawing it

out from the component side: do not use undue force.

Fill the hole with solder and then clear with solderwick.

A3.2 Component Replacement M830P-00

01/07/00 Copyright TEL

3.2 Surface Mount Devices

Caution: Surface mount devices (SMDs) require special storage, handling,

removal and replacement techniques. This equipment should be serv-

iced only by an approved Tait Dealer or Customer Service Organisa-

tion equipped with the necessary facilities. Repairs attempted with

incorrect equipment or by untrained personnel may result in perma-

nent damage. If in doubt, contact your nearest Tait Dealer or Customer

Service Organisation.

3.3 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 with a solder-resistant spike or equiva-

lent.

M830P-00 Software History A4.1

4 Software History

28/06/96 PGM800Win Version 1.0

18/08/97 PGM800Win Version 2.00

4.1 PGM800Win V1.0

PGM800Win V1.0 is different in concept from DOS versions of PGM800 in that it is Win-

dows1 based. It also includes many new and improved features over DOS versions of

PGM800.

The major changes are outlined below:

• The Windows environment makes data entry and editing significantly easier.

• PGM800Win includes several new radio models which are not programmable

with DOS versions of PGM800.

• Out of range frequencies will result in warning messages and will not be accepted

for entry into the standard library module. User defined modules can be created,

however, allowing variation from the standard library module.

• Channel numbers default to 0-127 to match the EPROM memory locations. How-

ever, the user can change this setting so that the channel numbers run from 1-128

to suit his/her particular needs.

Note: The data files produced by BASEPROG V1.0 and all DOS versions of

PGM800 are still compatible with PGM800Win V1.0.

4.2 PGM800Win V2.00

PGM800Win V2.00 is an upgraded and expanded version of PGM800Win V1.0. It has

been developed specifically for T800 Series II base stations, but retains the ability to pro-

gram Series I equipment.

The major changes are outlined below:

• PGM800Win V2.0 will program T800 Series II base station modules via serial com-

munications.

• Deviation and reference modulation settings are written automatically to the

radio.

1. Windows is a registered trademark of the Microsoft Corporation.

A4.2 Software History M830P-00

01/07/00 Copyright TEL

• Extra information that is not stored in the radio (but which is still relevant to the

radio) can be saved to a file on disk (e.g. note field, auxiliary pin names, etc.).

Note: The data files produced by BASEPROG V1.0, all DOS versions of PGM800,

and PGM800Win V1.0 are still compatible with PGM800Win V2.00.

T800/T800 SERIES 2 MANUALS/Paging/M830P 00 1A0/Section A Introduction To Servicing Section

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