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

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M830P-00

T830 Series II Paging
Base Station Equipment
148-174MHz

Initial Adjustment Manual

July 2000
M830P-00-1A0

01/07/00

M830P-00
Canada

Taiwan

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

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

T800
T800
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. Box 679
Virginia
Queensland 4014
Australia
Phone: 61 7 3865-7799
Toll Free: 1800 077-112
Fax: 61 7 3865-7990

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. Box 1185
Christchurch
Phone: 64 3 348-3301
Fax: 64 3 343-0558

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

Singapore
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

01/07/00

Tait Electronics (Far East) Pte
Ltd
4 Leng Kee Road
SIS Building #05-11A
Singapore 159088
Phone: 65 471-2688
Fax: 65 479-7778

M830P-00

About This Manual
Scope

This manual contains general, technical, tuning and adjustment
information on T830 Series II 50W and 100W paging base stations which comprise the following equipment:
50W base station

T837 paging exciter
T838 50W power amplifier

100W base station

T837 paging exciter
T839 100W power amplifier

PCB Information

PCB information is provided for all current issue PCBs, as well
as all previous issue PCBs manufactured in production quantities, 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.

Copyright
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 Customer Service Organisation. When ordering, make sure you quote the correct Tait product code ("M" number). Note that only the latest issue of the manual will be available
for order.

01/07/00

M830P-00

Table Of Contents
This manual is divided into eight parts as listed below, with each part being further subdivided into sections. There is a detailed table of contents at the start of each part and/
or section.

Part

Title

Introduction To Servicing

T835 Receiver - not used in this manual

T837 Paging Exciter

T838 & T839 Power Amplifiers

T830 VCO PCB Information

Installation

T800-28-0X00 Paging Rack Frame

T800 Ancillary Equipment

01/07/00

M830P-00

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
1

Title

Page

General

1.1

Additional Technical Information

1.1

1.2

Caution: CMOS Devices

1.1

1.3

Caution: Aerial Load

1.2

1.4

Caution: Beryllium Oxide & Power Transistors

1.2

Mechanical

2.1

Torx Recess Head Screws

2.1

2.2

Pozidriv & Philips Recess Head Screws

2.2

2.3
2.3.1
2.3.2

Disassembly/Reassembly
Exciters
Power Amplifiers

2.3
2.3
2.3

2.4

Cover Screw Torques

2.3

2.5

Chassis & Cover Compatibility

2.4

Component Replacement

3.1

3.1
3.1.1
3.1.2

Leaded Components
Desoldering Iron Method
Component Cutting Method

3.1
3.1
3.1

3.2

Surface Mount Devices

3.2

3.3

Cased Mica Capacitors

3.2

Software History

4.1

PGM800Win V1.0

4.1

4.2

PGM800Win V2.00

4.1

Figure

Title

Page

1.1

Typical Product Code & Serial Number Labels

1.1

1.2

Typical Anti-static Bench Set-up

1.2

2.1

Torx Screw Identification

2.1

2.2

Pozidriv & Philips Screw & Screwdriver Identification

2.2

2.3

Identification Of New-Design Chassis & Covers

2.4

01/07/00

AII

01/07/00

M830P-00

General

M830P-00

General

1.1

Additional Technical Information

A1.1

If you have any questions about this manual or the equipment it describes, please contact 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).
this area used for regional
Type Approval information

T838-10-0000
Rev 1

product code
900000

Tait Electronics Limited
Made in New Zealand

serial number

T835-10-0000

Rev 1

900000

Tait Electronics Limited
Made in New Zealand

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 procedures 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.

01/07/00

A1.2

General

M830P-00

conductive
wrist strap

conductive rubber
bench mat

to building earth
(not mains earth)

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 substance, 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.

01/07/00

Mechanical

M830P-00

Mechanical

2.1

Torx Recess Head Screws

A2.1

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 applications.
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 M4 screws -

T10
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).

"star" shaped recess with
six internal notches

Figure 2.1 Torx Screw Identification

01/07/00

A2.2

Mechanical

2.2

Pozidriv & Philips Recess Head Screws

M830P-00

Pozidriv and Philips recess head screws will continue to be used in T800 Series II equipment 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).

Pozidriv

Philips
internal notches

no special markings
"star" markings
between slots

slots with parallel sides

slots with tapered sides

driving flutes with
parallel sides
driving flutes with
tapered sides
ridges between
driving flutes

Figure 2.2 Pozidriv & Philips Screw & Screwdriver Identification

01/07/00

Mechanical

M830P-00

2.3

Disassembly/Reassembly

2.3.1

Exciters

A2.3

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.

01/07/00

A2.4

Mechanical

2.5

Chassis & Cover Compatibility

M830P-00

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 important 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 regulations.
Figure 2.3 below shows some of the main features which can be used to identify the
new-design chassis and covers.
Chassis

←Top View

Rear View→

4 holes in
rear panel

loom channel in
top of walls

groove in top
of rear wall

Top Cover

provision for mounting speaker
(future development)

ridge on top
of rear wall

Bottom Cover

additional walls

Figure 2.3 Identification Of New-Design Chassis & Covers

01/07/00

Component Replacement

M830P-00

Component Replacement

3.1

Leaded Components

A3.1

Whenever you are doing any work on the PCB that involves removing or fitting components, you must take care not to damage the copper tracks. The two satisfactory methods 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 circular motion.
Start the suction and continue the movement until 3 or 4 circles have been completed.
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 soldering iron on the tip of the desoldering iron (this may require some additional 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.

01/07/00

A3.2

Component Replacement

3.2

Surface Mount Devices

Caution:

3.3

M830P-00

Surface mount devices (SMDs) require special storage, handling,
removal and replacement techniques. This equipment should be serviced only by an approved Tait Dealer or Customer Service Organisation equipped with the necessary facilities. Repairs attempted with
incorrect equipment or by untrained personnel may result in permanent damage. If in doubt, contact your nearest Tait Dealer or Customer
Service Organisation.

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 equivalent.

01/07/00

Software History

M830P-00

A4.1

Software History

28/06/96
18/08/97

4.1

PGM800Win Version 1.0
PGM800Win Version 2.00

PGM800Win V1.0

PGM800Win V1.0 is different in concept from DOS versions of PGM800 in that it is Windows1 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. However, 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 program Series I equipment.
The major changes are outlined below:
•

PGM800Win V2.0 will program T800 Series II base station modules via serial communications.

•

Deviation and reference modulation settings are written automatically to the
radio.

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

01/07/00

A4.2
•

Software History

M830P-00

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:

01/07/00

The data files produced by BASEPROG V1.0, all DOS versions of PGM800,
and PGM800Win V1.0 are still compatible with PGM800Win V2.00.

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