Multitone Electronics PLC TLA-FLA Alphanumeric VHF Radio Paging Receiver User Manual TM1205pr

Multitone Electronics PLC Alphanumeric VHF Radio Paging Receiver TM1205pr

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Technical Manual

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Date Submitted2002-12-19 00:00:00
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Document TitleTM1205pr
Document CreatorPreliminary Pages for TM1205
Document Author: Unknown

TECHNICAL MANUAL
for
RADIO PAGING RECEIVERS
MODEL TLA 852
and
MODEL FLA 872
Printed and Published in England
TM1205 Issue 1
Page (i)
TLA 852/FLA 872
COMPANY LIABILITY
The information in this manual has been carefully compiled and checked for technical
accuracy. Multitone Electronics plc accept no liability for inaccuracies or errors. In line with
the company policy of technical advancement, the information within this document may be
changed. The user should ensure that the correct issue of the document is used. Comments
or correspondence regarding this manual should be addressed to:
Multitone Electronics plc
Multitone House
Beggarwood Lane
Kempshott Hill
Basingstoke
Hampshire RG23 7LL
England
ISSUE
DATE
November 2002
© 2002 Multitone Electronics plc
Page (ii)
TM1205 Issue 2
CONTENTS
TM1205 Issue 2
Page (i)
Title Page
Page (ii)
Company Liability
Page (iii)
Contents
Page (iv)
Effective Page List
Page (v)
Safety Summary
Warning
Page (vi)
Caution
Section 1
Introduction and Specification
Section 2
Operating Instructions
Section 3
Technical Description
Section 4
Installation & Commissioning
Section 5
Servicing
Section 6
Spare Parts List
Section 7
Diagrams
Page (iii)
TLA 852/FLA 872
EFFECTIVE PAGE LIST
Page No.
Issue
Page No.
Issue
(i)
(ii)
2-9
2-10
(iii)
(iv)
2-11
2-12
(v)
(vi)
1-1
1-2
Issue
Page No.
Issue
5-3
5-4
5-25
5-26
5-5
5-6
6-1
6-2
2-13
2-14
5-7
5-8
6-3
6-4
2-15
2-16
5-9
5-10
6-5
6-6
6-7
6-8
1-3
1-4
3-1
3-2
5-11
5-12
7-1
7-2
1-5
1-6
3-3
3-4
5-13
5-14
7-3/4
7-5/6
2-1
2-2
3-5
3-6
5-15
5-16
7-7/8
7-9/10
2-3
2-4
3-7
3-8
5-17
5-18
7-11/12
7-13/14
2-5
2-6
3-9
3-10
5-19
5-20
7-15/16
7-17/18
2-7
2-8
4-1
4-2
5-21
5-22
7-19/20
7-21/22
5-1
5-2
5-23
5-24
Page (iv)
Page No.
TM1205 Issue 2
FCC & IC Statement Of Compliance
This device complies with FCC Part 15 & Industry Canada RSS210 regulations. Operation is
subject to the following two conditions:- (1) this device may not cause harmful interference and
(2) this device must accept any interference received, including interference that may cause
undesired operation.
Unauthorised modification to this equipment, will void the user’s authority to operate the device
under the terms of the above regulations.
SAFETY SUMMARY
The following information applies to both operating and servicing personnel. General Warnings
and Cautions will be found throughout the manual, where they apply, which refer to the applicable
part of this summary.
WARNING statements identify conditions or practices that could result in personal injury or loss
of life.
CAUTION statements identify conditions or practices that could result in equipment damage.
WARNING
THE RECEIVER SHOULD NOT BE CARRIED INTO AREAS WHERE EXPLOSIVE
GASES, OR DUST MAY BE PRESENT.
CAUTION
STATIC SENSITIVE DEVICES ARE USED WITHIN THIS EQUIPMENT. CARE MUST BE
USED TO ENSURE DAMAGE TO THESE DEVICES IS NOT CAUSED BY HIGH LEVELS OF
STATIC ELECTRICITY. SPARE BOARDS OR COMPONENTS SHOULD BE STORED IN
ANTI-STATIC PACKAGING WHEN NOT INSTALLED IN THE EQUIPMENT.
PROTECT THE RECEIVER FROM LIQUIDS, STRONG MAGNETIC FIELDS AND EXTREME
TEMPERATURES. DO NOT LEAVE THE RECEIVER EXPOSED TO STRONG SUNLIGHT.
AREAS SUCH AS WINDOW LEDGES ARE TO BE AVOIDED.
TM1205 Issue 1
Page (v)
TLA 852/FLA 872
INTENTIONALLY BLANK
Page (vi)
TM1205 Issue 2
TLA 852/FLA 872
SECTION 1
INTRODUCTION & SPECIFICATION
CONTENTS:
Page
1.1
INTRODUCTION
1-2
1.2
FEATURES
1-3
1.3
SPECIFICATIONS
1-3
1.3.1
Receiver Performance
1-3
1.3.2
Power Supply
1-4
1.3.3
Code Format
1-4
1.3.4
Memory
1-5
1.3.5
Displays, Controls and Alerts
1-5
1.3.6
Operational Environment
1-6
1.3.7
Physical Characteristics
1-6
TABLES:
1.1
Sensitivity Figures
TM1205 Issue 2
1-4
Page 1 - 1
TLA 852/FLA 872
1.1
INTRODUCTION
The MultitoneTLA 852 and FLA 872 Radio Paging Receivers are VHF receivers
which receive messages sent in CCIR Radiopaging Code No.1 (RPC1).
The front panel of the unit has a Liquid Crystal Display (LCD) to display messages
and other information. The three buttons on the front panel are used to control the
functions of the unit.
The LCD of the TLA 852 can show a maximum of two lines of 20 alphanumeric
characters; the FLA 872 has the option of showing a maximum of four lines of 20
characters, or two lines of double height characters. The displays can also show a
maximum of seven symbols in a line.
If the TLA 852 receives a message that is longer than 40 characters, it displays the
first 40 and stores the excess. The front panel buttons are used to transfer the
stored part of the message to the screen as required. Similarly, if the FLA 872
receives a message which has more than 80 characters (40 characters in double
height mode) the excess characters are stored.
Message alert is provided by an audible beep tone or by the unit vibrating. The
buttons are used to select the preferred alert.
Power for the unit is supplied by a single AAA battery. A door on the rear of the unit
gives access to the battery.
A back-up supply for the unit is available when the battery is changed. The back-up
supply is provided by a large-value capacitor mounted on the decoder board in the
unit. The capacitor, when fully charged, can maintain data in the unit for more than
5 minutes.
The unit case is a two-piece plastic moulding secured by two cross-head screws. A
lanyard is supplied with the unit which can be fastened to the case and the attached
clip used to secure the unit to a suitable object.
Page 1 - 2
TM1205 Issue 2
TLA 852/FLA 872
1.2
FEATURES
The unit has these features:
Displays two lines of 20 characters - TLA 852 (four lines - FLA 872)
Message Store
Information Service Messages (Optional)
Display Backlight
Date/Time Display
Selectable Alert - Audible Beep or Vibration
Alarm
Out of Range Indication (Optional)
Timed-off Mode
Low Battery Warning
Battery Economy
1.3
SPECIFICATIONS
1.3.1
Receiver Performance
Frequency Range:
138MHz through 174.1MHz
Frequency Bands:
Band 1:
Band 2:
Band 3:
Band 4:
Band 5:
Band 6:
138.000MHz - 143.499MHz
143.500MHz - 148.999MHz
149.000MHz - 154.999MHz
155.000MHz - 160.999MHz
161.000MHz - 167.499MHz
167.500MHz - 174.100MHz
Channel Spacing:
10/12.5/25kHz
Intermediate Frequencies:
21.4MHz and 455kHz
Crystal Frequencies:
Local Oscillator:
Carrier Frequency minus 21.4MHz
2nd Oscillator:
20.945MHz
TM1205 Issue 2
Page 1 - 3
TLA 852/FLA 872
Sensitivity:
The sensitivity figures quoted in Table 1 assume an ambient temperature in the
range 18EC through 25EC. The battery voltage should be above the low battery
trigger point of approximately 1.15 volts. At temperatures between the ambient and
maximum / minimum, performance is at an intermediate value. At temperature
extremes degradation of sensitivity shall not exceed 6dB.
Table 1.1: Sensitivity Figures
NOTE:
1.3.2
1.3.3
MEASUREMENT
MODE
BEST
POSITION,
TYPICAL
TEM CELL
(dBm),
TYPICAL
BAUD
RATE
On Pole
12dBµVm-1
14dBµVm-1
20dBµVm-1
-106dBm
-104dBm
-101dBm
512
1200
2400
The following performance figures are typical for an ambient temperature
range of 15EC through 35EC.
Adjacent Channel Selectivity:
>78dB
Image Response:
>70dB
Spurious Response:
>70dB
Intermodulation Response:
>62dB
Co-channel Rejection:
>-6dB
Power Supply
Battery Type:
Alkaline AAA (1.5 Volts Nominal)
Typical Battery Life:
800hrs
Code Format
The Code Type is CCIR Radio Paging Code No.1 POCSAG
Page 1 - 4
TM1205 Issue 2
TLA 852/FLA 872
1.3.4
1.3.5
Memory
Capacity:
The units can accept messages to a
maximum of 1024 characters. They
can store a maximum of 32 read or
unread messages and six archive
messages.
Recall:
Stored messages can be retrieved in
any order.
Displays, Controls and Alerts
Liquid Crystal Display:
TLA 852: Two lines of text.
FLA 872: Four lines of text.
Control Buttons:
Three push-buttons (Select, Left and
Right) on the front panel of the unit,
control all the functions of the pager.
Display Illumination:
The display illumination is selected
ON or OFF from the Display Options
Screen, by using the front panel
control buttons.
Audible Alert:
Various tone patterns can be selected
or muted from the Alert Options
Screen, by using the front panel
control buttons.
Vibration:
The vibration alert can be set to ON
or OFF by using the front panel
controls.
TM1205 Issue 2
Page 1 - 5
TLA 852/FLA 872
1.3.6
Operational Environment
The unit will operate to specification within these limits:
Operating Temperature:
-10EC through +55EC
Storage Temperature:
-20EC through +60EC
NOTE:
1.3.7
There may be some degradation of display performance below 0EC.
Physical Characteristics
Dimensions:
Width:
Height:
Depth:
Weight:
60g (with battery)
Page 1 - 6
75mm
48mm
17mm
TM1205 Issue 2
TLA 852/FLA 872
SECTION 2
OPERATING INSTRUCTIONS
CONTENTS:
Page
2.1
2.1.1
2.1.2
CONTROLS AND INDICATORS
Display
Controls
2-3
2-4
2-4
2.2
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.2.6
2.2.7
2.2.8
2.2.9
2.2.10
2.2.11
2.2.12
2.2.13
OPERATING INSTRUCTIONS
General
Switching the Unit ON
Setting the Options
Archive
Alarm
Alert
Display Backlight (TLA 852)
Display Options (FLA 872)
Changing the Height of the Characters
Display Backlight (FLA 872)
Setting the Time and Date and Timed-off Time
Deleting Messages
Switching the Unit OFF
2-4
2-4
2-4
2-5
2-6
2-6
2-7
2-8
2-8
2-8
2-9
2-9
2 - 11
2 - 12
2.3
2.3.1
2.3.2
2.3.3
2.3.4
2.3.5
RECEIVING AND STORING MESSAGES
Receiving a Message
Reviewing Stored Messages
Archiving Messages
Reviewing Information Service Messages
No Service
2 - 13
2 - 13
2 - 13
2 - 14
2 - 14
2 - 14
2.4
2.4.1
2.4.2
LOW BATTERY
Low Battery Warning
Replacing the Battery
2 - 15
2 - 15
2 - 15
2.5
LANYARD ASSEMBLY
2 - 16
TM1205 Issue 2
Page 2 - 1
TLA 852/FLA 872
FIGURES:
Page
2.1
2.2
2.3
2.4
2.5
2-3
2-4
2-5
2 - 15
2 - 16
Controls and Display
Standby Screen
Option Screen Symbols
Opening the Battery Door
Lanyard Assembly
Page 2 - 2
TM1205 Issue 2
TLA 852/FLA 872
WARNING
DO NOT TAKE THE PAGER INTO AREAS WHERE EXPLOSIVE GASES, OR
DUST MAY BE PRESENT.
CAUTION
PROTECT THE PAGER FROM LIQUIDS, STRONG MAGNETIC FIELDS AND
EXTREME TEMPERATURES. DO NOT LEAVE THE PAGER EXPOSED TO
STRONG SUNLIGHT.
2.1
CONTROLS AND INDICATORS
Refer to Figure 2.1 for the identification and location of the controls and display
associated with the TLA 852 and FLA 872.
Note:
In Germany, Style A (aerofoil) case is only for T Mobile use.
In the United Kingdom, Style B (oval) case is only for use by Vodafone Paging.
DISPLAY
DISPLAY
CONTROL BUTTONS
CONTROL BUTTONS
STYLE A
STYLE B
TAG11268
Figure 2.1: Controls and Display
TM1205 Issue 2
Page 2 - 3
TLA 852/FLA 872
2.1.1
Display
The Liquid Crystal Display (LCD) in the TLA 852 shows two lines of characters. The
FLA 872 shows four lines of characters (or two lines of double height characters) . Each
line can have a maximum of 20 characters. Both units can also show a maximum of
seven symbols in a line. Lamps (Electro-luminescent (EL) option also available - FLA
Series only) are incorporated in the unit, to illuminate the display when required.
2.1.2
Controls
The three push-buttons have these functions:
O>
Selects the unit functions
Moves the cursor to the left
Moves the cursor to the right
2.2
OPERATING INSTRUCTIONS
2.2.1
General
The operation of most functions of the TLA 852 and the FLA 872 is identical. Where
differences occur, both operations are described.
2.2.2
Switching the Unit ON
When the battery is installed in the unit, the display shows the time and date on the
bottom line and the status symbols on the top line. The display stays on until the
battery is removed or the ‘OFF’ mode is selected.
If the unit is in the ‘OFF’ mode, push and hold the O> button until the Audio and
Vibrate Alerts operate. The display then shows a message for a short time before
the time and date show. This is the ‘standby’ screen.
5:27 pm 25 .12 .98
Figure 2.2: Standby Screen
Page 2 - 4
TM1205 Issue 2
TLA 852/FLA 872
2.2.3
Setting the Options
Make sure that the unit is ON and that the display shows the standby screen.
Push and release the O> button. The display will show seven symbols. These are:
ARCHIVE
ALARM
ALERT
BACKLIGHT
SET TIME
DELETE
MESSAGES
OFF
TAG11216-1
TLA 852 Option Screen
ARCHIVE
ALARM
ALERT
DISPLAY
SET TIME
DELETE
MESSAGES
OFF
TAG11264-1
FLA 872 Option Screen
Figure 2.3: Option Screen Symbols
Í
Ì
Push the or the button to choose the required symbol (the symbol flashes as it
is chosen) then push the O> button to select the function.
Paragraphs 2.2.4 through 2.2.12 give the function and operation of each symbol.
TM1205 Issue 2
Page 2 - 5
TLA 852/FLA 872
2.2.4
Archive
a)
General
The operator can use this option to archive received messages and also to view
messages in the archive store.
b)
Archiving Messages
Select the required message and view the complete message by pressing the
O> button. After the last screen of the message is displayed, push the or
the button to choose the archive symbol.
Í
Ì
When the archive symbol flashes, push the O> button. The display shows the
archive symbol plus a flashing ?. Push the O> button again to transfer the
message to the archive memory.
If the archive is full, the ‘memory full’ symbol
will flash. A message must
be deleted from the archive memory before the new message can be saved.
c)
Viewing Archived Messages
To view the messages in the archive memory select the archive symbol on the
options screen and push the O> button. Push the button to select the most
recent message. Push the or the button to scroll through the messages.
If the message is more than one screen long push the O> button to display the
next screen.
Í
Ì
Ì
NOTE: If there are no information services available in the unit, push the
button to select the archive directly from the standby screen.
Ì
To return to the standby screen, push and hold the O> button for one second
or wait for the unit to time-out and show the standby screen.
2.2.5
Alarm
The alarm can be set to operate once at any time in a twenty four hour period. To
set the alarm, first select the alarm function on the option screen as shown in
paragraph 2.2.3.
Use the
¬
or
buttons to choose the alarm ON or alarm OFF symbol.
When the alarm is set to OFF, the
shown.
Page 2 - 6
symbol shows and the alarm time is not
TM1205 Issue 2
TLA 852/FLA 872
When the alarm is set to ON and the alarm time is reached, the standby screen will
show a flashing alarm symbol and the alert will operate for eight seconds. To stop
the alert within the eight second period, push any button.
To set the alarm time, set the alarm to ON. The display shows the alarm symbol and
also shows the time the alarm is set to sound.
To change the time:
Push the O> button and the hour numbers flash. Use the
set the required hour.
b)
Push the O> button again and the tens of minutes number flashes. Set the
required figure with the
or
buttons, then push the O> button to make the
or
buttons.
minutes number flash. Set the required figure with the
c)
2.2.6
¬
a)
¬
¬
or
buttons to
To return to the standby screen, push and hold the O> button for one second
or wait for the unit to time-out. The screen now shows the alarm symbol to
indicate that the alarm is set.
Alert
The alert can be set to one of nine options; seven audible, vibrate or ‘no alert’.
To set the alert, first select the alert function on the option screen as shown in
paragraph 2.2.3
¬
a)
or
buttons to select an alert (as
When the alert screen shows, use the
each alert is selected, the associated tone sounds or the vibrate operates. To
stop the alert, push any button).
b)
When the required alert is selected, push the O> button for one second or wait
for the unit to timeout.
c)
The display returns to the standby screen and shows the alert symbol.
If the vibrate alert is selected, the display shows
When the audible alert is selected, the display shows
When ‘no alert’ is selected, the display shows
The alert can be quickly set ON or OFF from the standby screen by pushing and
holding the O> button for three seconds.
TM1205 Issue 2
Page 2 - 7
TLA 852/FLA 872
2.2.7
Display Backlight (TLA 852)
The unit display has a backlight which allows the display to be read in low-light
conditions.
To operate the backlight, first select the backlight function on the option screen as
shown in paragraph 2.2.3
When the backlight screen shows, use the
ON or OFF.
¬
or
buttons to select the backlight
To return to the standby screen, push and hold the O> button for one second or wait
for the unit to time-out.
2.2.8
Display Options (FLA 872)
Choose this option to show the display options screen. This shows two options :
2.2.9
a)
To change the height of the message characters ABC (refer to paragraph 2.2.9)
b)
To operate the backlight
2.2.10)
(refer to paragraph
Changing the Height of the Characters
When the display option screen is selected, the screen shows the two symbols with
the ABC symbol flashing.
There are two heights of character available; single height, which allows four lines
of a message to show on the screen, and double height, which shows two lines of
a message in large characters.
To change the character height, push the
shows on the screen.
¬ or - buttons
until the required height
To return to the standby screen, push and hold the O> button for one second or wait
for the unit to time-out.
Page 2 - 8
TM1205 Issue 2
TLA 852/FLA 872
2.2.10 Display Backlight (FLA 872)
Select the display option screen, then push the O> button to choose the backlight
function.
Use the
¬
or
buttons to select the backlight ON
or OFF
To return to the standby screen, push and hold the O> button for one second or wait
for the unit to time-out.
2.2.11 Setting the Time and Date and Timed-off Time
To set the time and date or the timed-off time, first select the set time function on the
option screen, as shown in paragraph 2.2.3 The set time screen then shows two
options:
a)
Setting Time and Date
b)
Setting Timed-off Time
(Refer to paragraph A).
(Refer to paragraph B).
A) Setting Time and Date
a)
¬
Use the
or
buttons to choose the Setting Time and Date symbol
push the O> button.
then
12
5:27pm 25.12.98
b)
The screen shows the time and date with the hour numbers flashing. If the
clock is set to the 12 hour mode, the ‘am/pm’ characters also flash.
c)
Use the
TM1205 Issue 2
¬ or -
buttons to set the required hour.
Page 2 - 9
TLA 852/FLA 872
d)
Push the O> button again and the tens of minutes number flashes. Set the
required figure with the
or
buttons.
e)
Push the O> button to make the minutes number flash. Set the required figure
with the
or
buttons.
f)
Push the O> button again and the date ‘day’ numbers flash. Use the
buttons to set the required figures.
g)
Push the O> button again and the ‘months’ numbers flash. Set the required
figure with the
or
buttons.
h)
Push the O> button again to make the ‘year’ numbers flash. Set the required
or
buttons.
figure with the
i)
Push the O> button to select the 12 or 24 hour mode. Use the
to set the required mode.
j)
When the display shows the required time and date, push the O> button for
one second to return to the standby screen, or wait for the unit to time-out.
¬
¬
¬
¬
¬
or
¬ or -
buttons
B) Setting Timed-off Time
This option sets the pager OFF and ON at preset times (e.g. overnight). To select
this option :
k)
Select the Set Time screen as shown in paragraph 2.2.11.
l)
Use the
or
buttons to choose the Z
symbol then push the O> button.
The display shows the Timed-off edit screen.
¬
m) To set the Timed-off option to OFF, push the
and stop times do not show.
n)
To set the Timed-off option to ON, push the
stop times show on the display.
o)
To change the START and STOP times:
i)
Page 2 - 10
¬
or
buttons until the start
¬ or - buttons until the start and
Set the Timed-off option to ON, then push the O> button. The first
numbers (Start Time hours) flash. If the clock is set to the 12 hour mode,
the ‘am/pm’ characters also flash.
TM1205 Issue 2
TLA 852/FLA 872
11:15pm 6:45am
¬
ii)
Push the
iii)
Push the O> button to select the next number (tens of minutes) then push
the
or
buttons to select the required number.
iv)
Push the O> button again to select the next number (minutes) then push
the
or
buttons to select the required number.
v)
Push the O> button again to select the next number (Stop Time hours).
vi)
Repeat operation ii) through iv) to set the required Stop Time hours and
minutes.
¬
¬
or
buttons to select the required hour.
vii) To return to the standby screen, push and hold the O> button for one
second or wait for the unit to time-out.
2.2.12 Deleting Messages
a)
Deleting Stored or Archived Messages
To delete any message in the store or archive memories of the pager.
Select the message with the
complete message.
¬
or
buttons. Use the O> button to read the
When the last screen is displayed, push the O> button then use the
buttons to select the delete
¬
or
symbol.
Push the O> button. The display shows the delete symbol plus a flashing ?
Push the O> button to delete the message.
TM1205 Issue 2
Page 2 - 11
TLA 852/FLA 872
b)
Deleting All Stored Messages
All the messages in the store memory (but not those in the archive memory) can
be deleted in one operation.
Push the O> button to show the seven option symbols.
Use the
¬
or
buttons to choose the
symbol.
Push the O> button to select the function.
The display shows the
symbol plus a flashing ? symbol.
Push the O> button to delete all the messages.
2.2.13 Switching the Unit OFF
The pager can be switched OFF (sleep mode) but the pager cannot receive
messages while it is set to this state.
To switch the pager OFF, select the OFF function on the option screen as shown in
paragraph 2.3.3
The display shows the
symbol plus a flashing ? symbol.
Push the O> button to set the pager to OFF.
The screen goes blank.
Page 2 - 12
TM1205 Issue 2
TLA 852/FLA 872
2.3
RECEIVING AND STORING MESSAGES
2.3.1
Receiving a Message
When the pager receives a new message the first part of the message shows on the
display and the alert operates for eight seconds.
Push any button to acknowledge receipt of the message and to stop the alert.
If the call is not acknowledged the pager will give a short alert every five minutes for
a maximum period of one hour.
To display the message, push the
button. If the message is longer than the
screen can show, push the O> button to show the next part of the message.
To return to the standby screen, push and hold the O> button for one second or wait
for the unit to time-out. If the message has not been read, the standby screen will
show the ‘message’ symbol.
2.3.2
Reviewing Stored Messages
To display the received messages, starting with the newest message, push the
button. To scroll through the messages, use the
or
buttons. If the
message is longer than the screen can show, push the O> button to show the next
part of the message.
¬
When the last part of the message is shown, push the O> button. The display shows
three symbols:
To read the message again, use the
push the O> button.
¬
¬ or - buttons to select the first symbol then
To delete the message, use the
or
buttons to select the second symbol then
push the O> button. The display shows the delete symbol plus a flashing ? symbol.
Push the O> button again to delete the message.
¬
To put the message in the Archive Store, use the
or
buttons to select the third
symbol then push the O> button. The display shows the archive symbol plus a
flashing ?. Push the O> button again to transfer the message to the Archive Store.
To return to the standby screen at any time, push and hold the O> button for one
second or wait for the unit to time-out.
TM1205 Issue 2
Page 2 - 13
TLA 852/FLA 872
The unit memory can hold a maximum of 20 messages. When this number is
reached the standby screen shows the memory full
symbol.
If a new message is received when the memory is full, the oldest message is
deleted.
2.3.3
Archiving Messages
Messages can be protected by transferring them to the Archive Store. Refer to
paragraph 2.3.4 or paragraph 2.4.2. for the procedure.
2.3.4
Reviewing Information Service Messages (Optional Feature)
When this feature is available, the standby screen shows the
pager receives an Information Service message.
To select the Information Service menu, push the
the standby display.
¬
symbol when the
button when the screen shows
The information menu screen shows a maximum of eight number symbols, each
enclosed within a circle. Numbers which have unread Information Service messages
have a thicker circle.
¬
Use the
or
buttons to choose the required service number then push the
O> button to show the message.
To review other messages on the same service, push the
required message shows.
¬
or
buttons until the
To return to the Information Services menu push the O> button repeatedly until the
menu shows.
To put an information service message into the Archive Store, use the procedure
given in paragraph 2.3.4.
2.3.5
No Service (Optional Feature)
When this feature is available, the standby screen shows the No Service symbol if
the pager cannot receive signals from the paging network.
Page 2 - 14
TM1205 Issue 2
TLA 852/FLA 872
2.4
LOW BATTERY
2.4.1
Low Battery Warning
When the battery needs replacing, the pager sounds an alert and the low battery
symbol shows on the standby screen.
2.4.2
Replacing the Battery
a)
Refer to Figure 2.4. Use a thumbnail to press down on the battery door lock on
the back of the unit. Hold the door lock down and push the battery door in the
direction shown. Rotate the door as shown in Figure 2.4 to gain access to the
battery.
b)
Remove the old battery.
c)
Refer to the diagram in the battery compartment and install the new battery.
PUSH THE DOOR LOCK TO
RELEASE THE BATTERY DOOR
SLIDE THE BATTERY DOOR
FORWARD
PUSH THE LONG EDGE OF THE
BATTERY DOOR UPWARDS TO OPEN IT
TAG11126-1
Figure 2.4: Opening the Battery Door
TM1205 Issue 2
Page 2 - 15
TLA 852/FLA 872
2.5
LANYARD ASSEMBLY
Figure 2.5 shows the method of assembling the lanyard to the unit.
STAGE 2
STAGE 1
SQUEEZE THE LOOP TOGETHER
AND PUSH IT INTO THE SLOT
PULL THE LOOP THROUGH THE SLOT
AS FAR AS POSSIBLE
STAGE 3
FEED THE CLIP THROUGH
THE LOOP AND PULL TIGHT
TAG11261-1
Figure 2.5: Lanyard Assembly
Page 2 - 16
TM1205 Issue 2
TLA 852/FLA 872
SECTION 3
TECHNICAL DESCRIPTION
CONTENTS:
3.1
3.2
3.3
3.3.1
3.3.2
3.3.3
3.3.4
3.3.5
3.3.6
3.3.7
3.3.8
3.4
CIRCUIT SUMMARY
DUAL CONVERSION RECEIVER
DECODER
General
POCSAG Decoder
Microprocessor
EEPROM
SRAM
LCD Module
Display Illumination
Alerts
POWER SUPPLIES
Page
3-2
3-4
3-7
3-7
3-7
3-8
3-8
3-8
3-8
3-9
3-9
3-9
FIGURES:
3.1
3.2
3.3
TLA 852/FLA 872 Block Diagram
Receiver Block Diagram
Decoder Block Diagram
TM1205 Issue 2
3-2
3-4
3-7
Page 3 - 1
TLA 852/FLA 872
3.1
CIRCUIT SUMMARY
The TLA 852 and FLA 872 radio paging receivers each consist of two Printed Circuit
Board (PCB) assemblies contained in a plastic case.
The case is constructed in two main parts, the case front and the case back. A cover
on the back of the unit provides access to the battery compartment.
The two boards in the case are:
a)
The Radio Board which has the Dual Conversion Receiver, the POCSAG
Decoder, the 1 volt regulator and the audio alert output circuit and transducer.
b)
The Decoder Board which has the microprocessor, the EPROM, the SRAM, the
Liquid Crystal Display Module, the LCD illumination, the vibrate motor and the
primary and backup power supplies.
The block diagram of the functional areas of the units is shown in Figure 3.1. Refer
to Section 7 for the circuit diagrams and board layout information.
RADIO BOARD
DECODER BOARD
B+
BATTERY
VOLTAGE
CONVERTER
VDD
BACK-UP
SUPPLY
VDD
DUAL
POCSAG
DECODER
CONVERSION
RECEIVER
DATA
B+
EEPROM
SRAM
PL401 SK1
B+
VDD
LIQUID
CRYSTAL
ADDR
DISPLAY
MODULE
RXEN
CHG
MICROPROCESSOR
DATA
LOBAT
CONTROL
GND
PROG
GND
AUDIBLE
ALERT
DISPLAY
ILLUMINATION
VIBRATE
MOTOR
TAG11262-1
Figure 3.1: TLA 852/FLA 872 Block Diagram
Page 3 - 2
TM1205 Issue 2
TLA 852/FLA 872
The RF signal enters the aerial and is fed to the dual conversion superheterodyne
receiver. The signal is demodulated from RF to audio frequency digital form and is
then fed to the decoder. This results in the received data activating the memory,
display and the selected audible alert or vibrate alert.
To prolong the life of the battery, the receiver operates in battery economy mode.
When the unit is in standby mode, the receiver is powered up at regular intervals
(equivalent to once per batch) to allow the POCSAG decoder to search for
pre-amble. While the unit is receiving preamble on its allocated channel, the
receiver remains powered up. This allows the POCSAG decoder to search for a
SYNC word. When the SYNC word is found, ‘batch lock’ is achieved. In batch lock
the receiver is only powered up during the allocated frame to allow the POCSAG
decoder to search for its address. If the address is found, the receiver stays ON for
the duration of the message.
TM1205 Issue 2
Page 3 - 3
TLA 852/FLA 872
3.2
DUAL CONVERSION RECEIVER
TR404
AGC CONTROL
FL401
TR401, TR402
CV404
TR403
IMAGE
FILTER
RF AMPLIFIER
CV407
MIXER
21.4 MHz
CV406
GND
XL402
TP403
(OPTIONAL)
AE401
AE402
GND
TR410
CV405
1st OSC.
IC401
RSSI
MIXER, IF AMP & DET.
MIXER
FL402 TP405 FL403
455kHz
CER
DET
IF AMP
FILTER
AMP
QUICK
CHARGE
FSK
COMP.
DECODER
455kHz
CER
TP401
SINAD
XL401
LOWB
INT.
REF.
2nd OSC.
1V
REG
RXEN
DELAY
FL404
PHASE
TR406
1V
SUPPLY
TP402
1V
TAG11263-1
Figure 3.2: Receiver Block Diagram
The incoming RF signal is received by the aerial AE401/AE402 which is tuned by
CV404. Capacitors C401, C405 and inductor L416 provide matching to RF amplifier
TR401, TR402. The amplifier, typically, yields a voltage gain of 20 dB. R401 and
R402 provide DC bias.
Page 3 - 4
TM1205 Issue 2
TLA 852/FLA 872
The output from the RF amplifier passes through an image filter which provides these
functions:
a)
Attenuation of signals outside the required band.
b)
Attenuation of the first image frequency.
c)
Matches the output impedance of the RF amplifier to the input impedance of the
mixer stage.
L401 and CV407 form a parallel tuned circuit with the resonant frequency set to the
carrier frequency.
L407 forms a series resonant circuit which provides a notch filter at the image
frequency.
The local oscillator comprises transistor TR410, crystal XL402 and associated
components. Frequency adjustment is by CV405. The local oscillator frequency is
calculated as follows:
fx = carrier frequency minus 21.4MHz
where fx is the crystal frequency in MHz.
C452, C453, C494 and R439 provide decoupling of the supply rail to give good
adjacent channel performance. The local oscillator signal is coupled to the mixer
circuit by C465.
The mixer circuit, TR403 and associated components, receives the RF output of the
image filter. The RF signal is mixed with the local oscillator output to produce a
21.4MHz product. This is matched to the filter, FL401, by L406, C495 and R412.
FL401 has a bandwidth of ±7.5kHz at the 3dB points.
The output from FL401 is matched by C485, R444 and L410 to IC401 pin 24. IC401
is a combined IF mixer / local oscillator / detector.
The second oscillator runs at 20.945MHz and, with the exception of XL401 and its
tuning capacitors C407, C408, is built into the IC. As the second oscillator is not
trimmed, small frequency errors are absorbed when tuning the first local oscillator.
The input at pin 24 is applied to the internal second mixer, and is mixed with the
second oscillator output to produce a 455kHz 2nd IF signal at pin 3. The IF signal
then passes through two ceramic filters FL403 and FL402 which remove unwanted
mixer products and provide further selectivity.
The output from FL403 is split: one output connects through C444 to pin 6 of IC401
and the IF amplifier; the other optionally connects to the Received Signal Strength
Indicator (RSSI) circuit in IC401 through C454, R426 and pin 5.
TM1205 Issue 2
Page 3 - 5
TLA 852/FLA 872
Due to the characteristics of filters FL401, FL402 and FL403, the signal at the input
to the IF amplifier has amplitude modulation (AM). The AM must be removed before
the signal reaches the detector stage. This is performed by the IF amplifier in IC401
which has very high gain and is designed to limit the amplitude of the signal to
remove the AM component and give a ‘square’ output. C479 and C480 provide
de-coupling for the IF amplifier.
The output from the IF amplifier passes to the detector in IC401. This circuit is a
Quadrature Demodulator which has two inputs. One input connects directly to the
IF amplifier, the other receives the signal from the IF amplifier through a phase delay
circuit connected to pins 9 and 10 of the IC. The phase delay depends on the
frequency of the IF signal and is 90 degrees at the centre frequency of the unit’s
allocated channel. The phase shift is provided by ceramic discriminator FL404,
capacitor C426 and resistor R416. C425 is a de-coupling capacitor.
The RSSI circuit in IC401 provides an optional Automatic Gain Control (AGC) signal
for the receiver. The circuit detects the received signal strength and gives a DC
current out. R426 sets the level at which the circuit starts to operate. The value of
68 kilohms sets it to approximately 16 dB above the noise floor. The DC output from
pin 22 of the IC connects to the AGC control circuit. When there is no RSSI output,
transistor TR404 is biased off and keeps the RF amplifier at full gain. At strong
signal levels the output from the RSSI causes TR404 to gradually start conducting,
thus reducing the gain of the RF amplifier. C451 determines the rise and fall times
of the AGC.
The output from the detector stage, pin 11, gives an audio output to TP401. This test
point is used in the final stages of production to align the receiver circuits. TP 401
is also used to program the decoder section of the unit. Pin 11 of IC401 also
connects through R425, R429 and R428 to pin 12. These resistors together with
capacitors C448, C483, C484 and the internal filter amplifier of IC401 form the data
filter; a unity-gain, low-pass filter which reduces high frequency noise.
The output of the data filter connects internally to the FSK Comparator. The data
output of the comparator, from pin 18, connects to the POCSAG Decoder, IC402,
pin 4. A logic signal from IC402, pin 2 to IC401, pin 16 controls the Fast/Slow charge
of the FSK Comparator. At switch-on the logic level is high and the circuit is set to
Fast Charge to allow the voltage on capacitor C492 to be set to the voltage level on
C486. The logic level at pin 16 is then set low which sets the comparator to normal
operation.
Page 3 - 6
TM1205 Issue 2
TLA 852/FLA 872
3.3
DECODER
SRAM
IC4
EEPROM
IC1
ADDRESS BUS
LIQUID
RESET
DATA BUS
VDD
RESET
IC5
XL403
DATA
POCSAG
DECODER
IC402
CRYSTAL
PL401 SK1
DISPLAY
MICROPROCESSOR
MODULE
CONTROL LINES
RESET
IC3
FROM
RECEIVER
TP401
SK1 PL401
PGM
DRIVER
TR415
TR416
!>BUTTON
BUTTON
BUTTON
SW3
DRIVER
TR2 OR
SW2
SW1
DRIVER
TR3; TR4
AUDIBLE
ALERT
DISPLAY
ILLUMINATION
VIBRATE
MOTOR
TAG11122-1
Figure 3.3: Decoder Block Diagram
3.3.1
General
The Decoder comprises the POCSAG decoder, Microprocessor, EEPROM, SRAM
message memory and switches, plus support components and a separate LCD
module. The signal from the receiver is processed by IC402, the POCSAG decoder,
and the decoded data passed to the microprocessor. The microprocessor stores the
information in the SRAM, IC4, before activating the selected alert and sending the
message data to the LCD module for display. The EEPROM holds information
applicable to the unit.
3.3.2
POCSAG Decoder
The POCSAG decoder, IC402, is located on the Radio Board of the unit and
connects to the microprocessor, IC3, through PL40I / SK1. Pin 4 of IC402 receives
the data signal from IC401. IC402 decodes the information and sends it, four bytes
at a time, to the microprocessor, IC3. IC402 uses the SCK clock pulses from IC3,
pin 59, to transfer the data on the SDO line, IC402, pin 13.
When no signals are received by the unit, the system goes into a standby mode to
reduce power consumption. In this mode, a pulse from IC402 pin 1 (BS1), sets the
receiver circuits ON for a brief period every 0.5s - 1s, depending upon Baud rate, to
check for a preamble signal. If such a signal is received, followed by a valid address
and message, a signal is sent from IC402, pin 15 (ATTN) to alert the microprocessor.
TM1205 Issue 2
Page 3 - 7
TLA 852/FLA 872
Pin 9 (CLK0) provides clock pulses to operate the microprocessor while it is in
standby mode.
Pin 11 (AREA) goes high when a valid signal is received.
Pin 14 (SDI) receives program information from the microprocessor.
Pin 2 (BS2) controls the ‘fast charge’ operation of the FSK comparator in IC401.
3.3.3
Microprocessor
The microprocessor controls the functions of the unit. A 4.19MHz clock, controlled
by XL2, provides the basic timing for the system.
Data received from IC402 is processed by the microprocessor and stored in the
SRAM chip, IC4. The microprocessor then causes the selected Alert to operate and
sends the message to the LCD module for display. Outputs from pin 5 (LCD-CS),
pin 39 (AD17), pin 38 (AD16) and pin 60 (WR) control the transfer of data to the LCD
module on the databus. Outputs from pins 2 and 7 control the operation of the audio
alert and the vibrate motor.
IC3 also controls the internal functions of the system, displaying the symbols and
changing the modes when selected by the three buttons on the front of the unit.
3.3.4
EEPROM
The EEPROM (IC1) holds information applicable to the unit, such as: Serial Number;
RIC codes; Radio parameters. The information is sent to the microprocessor through
the serial data link, pins 62, 63 and 64.
3.3.5
SRAM
The SRAM (IC4) is a 256k device which can store up to 32k of 8-bit information.
Address lines AD00 through AD14 and control lines RAM-CE and WR from the
microprocessor, control the flow of data in and out of the device on the databus.
3.3.6
LCD Module
The LCD Module produces the required characters and the symbols for the integral
display. Address lines AD16 and AD17 and control lines LCD-CS and WR from the
microprocessor, control the flow of data to the device on the databus.
Page 3 - 8
TM1205 Issue 2
TLA 852/FLA 872
C20 and C21 are part of the internal DC/DC converter of the module’s negative bias
supply.
R11, R12, R13, C17 and C22 through C25 are part of the circuit which controls the
voltage to the LCD driver.
3.3.7
Display Illumination
Two miniature lamps are used to illuminate the LCD display. The lamps are selected
ON or OFF using the buttons on the front panel. The ‘Lamp ON/OFF’ signal, which
comes from pin 8 of the microprocessor, controls transistor TR2 in the lamp circuit
of the TLA852, or TR7/IC2 for the EL display in the FLA 872.
3.3.8
Alerts
a)
Audible Alert (Beep)
The transducer, SP401, and the driver circuits TR415 and TR416, are located
on the radio board. The audible alert signal from IC3, pin 2 connects to TR415
through SK1/PL401 pin14. The alert can be selected ON or OFF using the
buttons on the front panel.
b)
Vibrate Alert
The vibrate motor is operated by transistors TR3 and TR4 on the decoder
board. The vibrate alert signal from IC3, pin 7 connects to pin 1 of TR3. The
alert can be selected ON or OFF using the buttons on the front panel.
3.4
POWER SUPPLIES
The primary power supply for the unit is a single 1.5 volt, AAA battery (BAT1). The
supply from the battery (B+) connects directly to the display illumination and vibrate
motor circuits, that require relatively high currents. B+ also connects to the radio
board through SK1/PL401, pin 9 and to the voltage converter, IC6, on the decoder
board.
IC6 and its associated components supply the +3.1 volts (VDD) for the unit. TR5, T1,
C9, C11, C26, R10 and D1 form an oscillator giving a frequency between 5kHz and
20kHz. The output is rectified by D1 and smoothed by C12. IC6 samples the voltage
and if it exceeds 3.1 volts, IC6 causes TR6 to switch off and stop the oscillator.
When the pager circuits take current, the voltage drops and the oscillator is turned
on again. This produces a sawtooth voltage on the 3 volt rail which gives less RF
noise than other converter circuits.
In addition to supplying the 3.1 volts, the circuit charges the backup supply (BAT2)
through resistor R6. Double diode D2 provides isolation for the two circuits.
TM1205 Issue 2
Page 3 - 9
TLA 852/FLA 872
IC5 monitors the voltage of VDD and resets the decoder circuits if the voltage drops
to a level that would cause data corruption.
Transistor TR1, connected to pins 6 and 15 of IC3, detects the battery voltage. If
BAT1 is removed, the drop in B+ causes transistor TR1 to switch OFF which sets the
microprocessor to low-current mode. In this mode BAT2 supplies sufficient power
to keep the microprocessor and the SRAM operational for up to 60 minutes.
The 1 volt supply for the receiver circuits is provided by transistor TR406 and its
associated components. The circuit is a series regulator and is maintained within
specification by a control circuit in IC401.
Page 3 - 10
TM1205 Issue 2
TLA 852/FLA 872
SECTION 4
INSTALLATION AND COMMISSIONING
There are no installation and commissioning procedures for the Radio Paging Receiver
Models TLA 852 and FLA 872.
TM1205 Issue 1
Page 4 - 2
TLA 852/FLA 872
INTENTIONALLY BLANK
Page 4 - 2
TM1205 Issue 2
TLA 852/FLA 872
SECTION 5
SERVICING
CONTENTS:
Page
5.1
SERVICE POLICY
5-3
5.2
ROUTINE MAINTENANCE
5-3
5.3
WORKSHOP PROVISIONS
5-3
5.4
5.4.1
5.4.2
TEST EQUIPMENT, TOOLS AND ANCILLARIES
Test Equipment
Tools and Ancillaries
5-3
5-3
5-4
5.5
5.5.1
5.5.2
5.5.3
5.5.4
5.5.5
5.5.6
DISASSEMBLY
Case Removal
Board Assembly Removal
Board Separation
LCD Module Removal
Vibrate Motor Removal
Battery Contacts Removal
5-4
5-4
5-5
5-5
5-6
5-6
5-6
5.6
5.6.1
5.6.2
5.6.3
5.6.4
5.6.5
5.6.6
ASSEMBLY
Battery Terminal Installation
Vibrate Motor Installation
LCD Module Installation
Board Assembly
Board Assembly Installation
Case Assembly
5-7
5-7
5-7
5-8
5-8
5-8
5-8
5.7
5.7.1
5.7.2
5.7.3
5.7.4
FAULT FINDING
General
Fault Diagnosis
Power Supply Voltage Adjustment
Battery Low Circuit Test
5-9
5-9
5-9
5-9
5 - 10
5.8
5.8.1
5.8.2
5.8.3
5.8.4
RADIO ALIGNMENT PROCEDURE
Preparation
Alignment Procedure
Pager Sensitivity Measurement (Coarse)
Pager Sensitivity Measurement (Fine)
5 - 22
5 - 22
5 - 22
5 - 24
5 - 25
5.9
5.9.1
5.9.2
5.9.3
PROGRAMMING
General
Equipment
Procedure
5 - 25
5 - 25
5 - 25
5 - 25
TM1205 Issue 1
Page 5 - 2
TLA 852/FLA 872
TABLES
Page
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5 - 14
5 - 14
5 - 15
5 - 15
5 - 19
5 - 20
5 - 21
Radio Board DC Voltage Levels
Radio Board Test Points
Decoder Board DC Levels
Decoder Board Test Sequence
IC3 Microprocessor Pin Connections
IC4 RAM Pin Connections
LCD Display Pin Connections
FIGURES:
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
5.11
5.12
5.13
5.14
Battery Door
Case Front Removal
Exploded View of Unit
Connections between Radio Board and Decoder Board
Fault Finding Guide (Sheet 1 of 3)
Fault Finding Guide (Sheet 2 of 3)
Fault Finding Guide (Sheet 3 of 3)
Decoder Board Waveforms
Display Module Waveforms
Semiconductor Connection Details
Radio Alignment Test Equipment
P671A Showing the Tuning Points
Configuration for Coarse Sensitivity Measurement
Polystyrene Block for TEM Cell Test - Dimensions
5-4
5-5
5-7
5 - 10
5 - 11
5 - 12
5 - 13
5 - 16
5 - 17
5 - 18
5 - 22
5 - 23
5 - 24
5 - 26
CAUTION
STATIC SENSITIVE DEVICES ARE USED IN THIS EQUIPMENT. TAKE CARE DAMAGE
IS NOT CAUSED TO THESE DEVICES BY HIGH LEVELS OF STATIC ELECTRICITY.
Page 5 - 2
TM1205 Issue 2
TLA 852/FLA 872
5.1
SERVICE POLICY
Except for Routine Maintenance, repairs are only to be performed by qualified
personnel in authorised workshops.
The unit can be repaired to component level. The display module is a disposable
item. If any screening cans are removed for access to components, they must be
refitted flush to the printed circuit board.
5.2
ROUTINE MAINTENANCE
This is limited to battery replacement and surface cleaning of the outer case. Clean
the case with a lint free cloth moistened with soapy water. Do not use spirit or other
solvents as they can damage the case.
5.3
WORKSHOP PROVISIONS
Repair workshops must be free from hostile radio interference or otherwise equipped
with Faraday cages. Suitable equipment must be available to remove and install the
surface mounted components which are used in this unit.
5.4
TEST EQUIPMENT, TOOLS AND ANCILLARIES
5.4.1
Test Equipment
The following test equipment is required:
IBM PC or compatible personal computer
Programming Software P669H
P645 Test Encoder
P645A POCSAG Test Encoder Software
RF Signal Generator
Oscilloscope
Millivoltmeter with high impedance, low capacitance probe
Alignment and Fault-Finding Jig P671, P671A, P671B
SINAD Meter
AC Millivoltmeter
Digital Multimeter
TM1205 Issue 2
Page 5 - 3
TLA 852/FLA 872
5.4.2
Tools and Ancillaries
The following tools and ancillaries are required:
DC Power Supply, 1-1.5 volts.
Cross-point Screwdriver
Surface Mount Handling Tools
Anti-static Workstation
5.5
DISASSEMBLY
5.5.1
Case Removal
a)
Refer to Figure 5.1. Use a thumbnail to press down on the battery door lock on
the back of the unit. Hold the door lock down and push the battery door in the
direction shown. Rotate the door as shown in Figure 5.1 to get access to the
battery.
b)
Remove the battery.
c)
Remove the two, 2.2mm x 6mm cross-head screws from the Case Back.
PUSH THE DOOR LOCK TO
RELEASE THE BATTERY DOOR
SLIDE THE BATTERY DOOR
FORWARD
PUSH THE LONG EDGE OF THE
BATTERY DOOR UPWARDS TO OPEN IT
TAG11126-1
Figure 5.1: Battery Door
Page 5 - 4
TM1205 Issue 2
TLA 852/FLA 872
APPLY PRESSURE
WITH FINGERS
TO SIDES OF CASE
LIFT FRONT EDGE OF CASE FRONT
UNTIL REAR CATCHES DISENGAGE
TAG11213-1
Figure 5.2: Case Front Removal
d)
5.5.2
5.5.3
Remove the Case Back by applying pressure to the sides of the case, as shown
in Figure 5.2, and lifting the front edge of the Case Front until the rear catches
disengage.
Board Assembly Removal
a)
Remove the Case Back (see paragraph 5.5.1).
b)
Carefully lift the Board Assembly at the long edge next to the LCD Module.
When the edge of the Board Assembly is clear of the case, pull the assembly
away from the case.
Board Separation
a)
Remove the Board Assembly from the case (see paragraphs 5.5.1 and 5.5.2).
b)
Carefully pull the front edge of the boards apart to disconnect the connector
between the boards.
c)
Pull the Decoder Board forward to release the LCD Module from under the
aerial.
d)
To get access to the Radio Board components, remove the rubber mat.
TM1205 Issue 2
Page 5 - 5
TLA 852/FLA 872
5.5.4
5.5.5
5.5.6
LCD Module Removal
a)
Remove the Board Assembly from the case (see paragraphs 5.5.1 and 5.5.2)
and separate the Decoder Board from the Radio Board (see paragraphs 5.5.3.,
a) through c)).
b)
Release the two module pins from the holes in the Decoder Board and carefully
fold the module away from the board to get access to the flexible cable.
c)
Use the Anti-static Workstation and the correct soldering tools to disconnect the
flexible cable from the board.
Vibrate Motor Removal
a)
Remove the Board Assembly from the case (see paragraphs 5.5.1 and 5.5.2)
and separate the Decoder Board from the Radio Board (see paragraphs 5.5.3.,
a) through c)).
b)
Use the Anti-static Workstation and the correct soldering tools to disconnect the
two wires from the board.
c)
Use a screwdriver to lever the Vibrate Motor carefully from the clip.
Battery Contacts Removal
a)
Remove the Board Assembly from the case (see paragraphs 5.5.1 and 5.5.2).
b)
Pull the contacts out of their slots in the Case Back.
Page 5 - 6
TM1205 Issue 2
TLA 852/FLA 872
5.6
ASSEMBLY
13
12
11
10
TAG11214-1
1.
2.
3.
4.
5.
6.
7.
Case Front Assembly
LED Display
Decoder Board Assembly
Radio Board Assembly
Case Back Assembly
Battery Positive Contact
Case Fixing Screw
8.
9.
10.
11.
12.
13.
Battery Door
Case Fixing Screw
Battery Negative Contact
Rubber Mat
Moulding Bezel LCD
Display Gasket
Figure 5.3: Exploded View of Unit
5.6.1
5.6.2
Battery Terminal Installation
a)
Refer to Figure 5.3 for the correct orientation of the terminal.
b)
Push the terminal into the slot in the Case Back.
Vibrate Motor Installation
a)
Install the Vibrate Motor in the clip.
b)
Use the Anti-static Workstation and the correct soldering tools to connect the
two wires to the Decoder Board.
TM1205 Issue 2
Page 5 - 7
TLA 852/FLA 872
5.6.3
5.6.4
5.6.5
5.6.6
LCD Module Installation
a)
Use the Anti-static Workstation and the correct soldering tools to connect the
flexible cable to the Decoder Board.
b)
Carefully fold the flexible cable and install the two pins on the rear of the
module in the holes on the Decoder Board.
Board Assembly
a)
Make sure that the Rubber Mat is correctly installed on the Radio Board.
b)
Put the Decoder Board on the Rubber Mat. Make sure that the four small
extensions at the rear of the LED Module are located under the aerial.
c)
Align SKT1 with PL401 and carefully press the two boards together until the
connectors are fully connected.
Board Assembly Installation
a)
Slide the Board Assembly into the Case Back.
b)
Make sure that the Battery Connector ‘fingers’ are in the correct position
under the Decoder Board.
c)
Push down on the front edge of the board and slide the board under the
small extensions on the Case Back.
d)
Push the rear edge of the Board Assembly into the Case Back.
Case Assembly
a)
Install the Case Front on the Case Back by applying pressure to the sides of
the case and pushing the rear edges of the case together until the catches
snap in place.
b)
Install the two 2.2mm x 6mm screws in the Case Back.
c)
Open the Battery Door and install the battery.
d)
Close the Battery Door and push it towards the top of the unit until it locks.
Page 5 - 8
TM1205 Issue 2
TLA 852/FLA 872
5.7
FAULT FINDING
5.7.1
General
Refer to the Fault Finding Guide (Figures 5.5 through 5.7) and the information
given in Tables 5.1 through 5.8 and Figures 5.8 through 5.10 to help resolve
problems. Alignment information is in paragraph 5.8. Programming information is
given in paragraph 5.9.
Faults can be caused by user negligence. Always check the unit for these faults:
a)
Damage to the Case or LCD
b)
Water damage
c)
Corrosion damage or leaking battery
Any metal parts which are corroded must be removed. Clean the affected area of
the Board assembly with a non-corrosive contact cleaner. Dry the area with a
low-pressure flow of warm air (40 EC through 50 EC). Install new parts.
5.7.2
Fault Diagnosis
Put a known good battery in the unit and switch ON the unit. Refer to the FaultFinding Guide (Figures 5.5 through 5.7). If it is suspected that the Decoder Board
is faulty, proceed as follows:
5.7.3
a)
Remove the Board Assembly from the case (see paragraphs 5.5.1 and
5.5.2).
b)
Separate the Decoder Board from the Radio Board (see paragraph 5.5.3).
c)
Disable the Battery Economy function by fitting a 0 ohm resistor in the
position for R456 (side 2 of the radio board near IC402).
d)
Use the 14-way lead (supplied with the P671B) to connect the two boards
(refer to Figure 5.4)
e)
Put the boards on an anti-static mat and connect a 1.5 volt supply to the
Decoder Board. Switch ON the power supply.
f)
Connect a ’10-times’ probe to the oscilloscope and measure the points given
in Table 5.4. Compare the waveforms on the oscilloscope with those shown
in Figure 5.9.
Power Supply Voltage Adjustment
There is no adjustment for the 1 volt, 1.5 volts or 3 volts power supplies.
TM1205 Issue 2
Page 5 - 9
TLA 852/FLA 872
PL401
SK1
BEC
GND
14
38.4kHz
B+
RESET
VDD
SDI
AREA
SDO
ATTN
SCK
PGM
14
LOWBAT
BEEP
TAG11336-1
Figure 5.4: Connections between Radio Board and Decoder Board
5.7.4
Battery-Low Circuit Test
To check the Battery-Low circuit:
a)
Connect the variable DC power supply to the unit and set the output to
0.9 volts.
b)
Switch ON the unit. The unit should go through the normal ‘start-up’
procedure (beep and vibrate for one second and show the programmable
switch-on message for three seconds). After approximately two minutes the
low battery symbol will appear.
c)
Switch OFF the unit but do not switch OFF or disconnect the variable DC
power supply. Set the output of the variable DC power supply to 1.2 volts.
d)
Switch ON the unit. Make sure that the unit goes through the normal ‘startup’ procedure.
Page 5 - 10
TM1205 Issue 2
TLA 852/FLA 872
PAGER
SUSPECT
FIT A NEW BATTERY
AND SWITCH ON.
'A'
IS THE ‘SWITCH ON’ MESSAGE
NO
YES
SEQUENCE?
BLANK
CORRUPTED
IS DISPLAY BLANK
OR CORRUPTED?
CORRUPTED EEPROM.
RE-PROGRAM. RE-TEST.
NO
IS BEEP AUDIBLE
AT SWITCH-ON?
YES
DE-CASE AND CHECK
DISPLAY MODULE, VDD
AND
INTERCONNECTIONS.
'A'
DE-CASE AND CHECK
DISPLAY, VDD, IC1, IC3, IC4,
AND POWER SUPPLIES.
NO
IS BEEP AUDIBLE
AT SWITCH-ON?
YES
DE-CASE AND CHECK
SP401, TR416, TR415.
'A'
'B'
TAG11127-1
Figure 5.5: Fault Finding Guide (Sheet 1 of 3)
TM1205 Issue 2
Page 5 - 11
TLA 852/FLA 872
‘B’
YES
>3dBm
LOW
CHECK
SENSITIVITY.
PLACE THE UNIT IN THE
P671. SEND A CALL.
NO
IS THE CALL RECEIVED?
‘B’
O.K.
YES
REALIGN AND
RE-TEST
RECEIVER
O.K.
DE-CASE.
PLACE IN P671.
CHECK 1V LINE.
IS LEVEL 1V ±50mV?
SEND PRE-AMBLE.
AT 50dBm WITH
±4.5kHz DEVIATION.
NO
CHECK TP416, TR406,
IC401.
IS DATA PRESENT ON
IC401 PIN 18?
YES
CHECK IC402,
PINS 4, 9, 12, 13 AND 14
NO
IS DATA PRESENT ON
IC401 PIN 12?
YES
CHECK IC401
NO
IS DATA PRESENT ON
IC401 PIN 11?
YES
NO
CHECK R425, R429
NO
NO
IS 455kHz PRESENT ON
IC401 PIN 6?
NO
IS 455kHz PRESENT ON
IC401 PIN 10?
YES
CHECK FL404 AND
YES
IC401.
IS VOLTAGE ON
IC401 PIN 17 >1.3V?
YES
‘C’
CHECK IC402
AND R457.
IC401 FAULTY.
TAG11134-1
Figure 5.6: Fault Finding Guide (Sheet 2 of 3)
Page 5 - 12
TM1205 Issue 2
TLA 852/FLA 872
‘C’
IS 455kHz PRESENT ON
TP405?
YES
NO
FL402 OR C444 FAULTY.
IS 2nd LOCAL OSC. O/P
(IC401, PINS 1 AND 2)
>200mV?
NO
YES
SHORT JUNCTION OF
C407/R446 TO 0V.
IS IC401, PIN 24 >3mV?
CHECK XL401
YES
NO
IS TR403 (1st MIXER
O/P) >3mV?
CHECK IC401
YES
CHECK FL401, L410 AND
R479 (280MHz board).
R444 (172MHz board).
REMOVE SHORT FROM
C407/R446 TO 0V.
NO
IS 1st LOCAL OSC. O/P
(TR410 COLLECTOR)
>25mV?
CHECK TR410, L408
AND XL402.
YES
NO
NO
CHECK TR401,
TR 402, L401, L416.
IS RF AT TR402
COLLECTOR >3mV?
CONNECT TR410 BASE
TO 0V. IS RF LEVEL AT
TR403 BASE >3mV?
YES
YES
CHECK TR403
AND L406.
CHECK FL405
‘B’
TAG11339-1
Figure 5.7: Fault Finding Guide (Sheet 3 of 3)
TM1205 Issue 2
Page 5 - 13
TLA 852/FLA 872
Table 5.1: Radio Board DC Voltage Levels
COMPONENT
COLLECTOR
TR401
0.29
0.73
RF Amplifier
TR402
0.87
1.02
0.29
RF Amplifier
TR403
0.845
0.678
First Mixer
TR404
0.733
0.015
AGC Switch
TR406
1.018
0.791
1.4
1V Series Regulator
TR410
0.95
0.937
0.264
First Local Oscillator
TR415
1.4
Beep Enable
TR416
1.4
Transducer Driver
NOTE:
BASE
EMITTER
COMMENTS
All radio board measurements were taken with the receiver turned on. The battery
terminal voltage was 1.4 volts, the 1 volt line was 1.019 volts and battery economy was
disabled. Voltages may vary by ±20mV.
Table 5.2: Radio Board Test Points
Page 5 - 14
TEST POINT
DESCRIPTION
VOLTAGE / SIGNAL
401
SINAD Output
0.56Volts
402
Radio Supply
1Volt
403
RSSI (AGC)
0.060Volts
404
Radio Ground
0Volts
405
Second IF
455kHz
406
Radio Ground
0Volts
414
Radio Ground
0Volts
416
Battery +
1.4Volts
418
Radio Ground
0Volts
TM1205 Issue 2
TLA 852/FLA 872
Table 5.3: Decoder Board DC Levels
DEVICE
COLLECTOR
BASE
EMITTER
REMARKS
TR1
3.00
3.00
1.4
Battery Disconnect Monitor
TR2
3.00
1.4
Backlight Driver
TR3
1.4
Vibrate Enable
TR4
1.4
Vibrate Motor Drive
0.19dc
2.2 V p-p
C5
R1/C4
4ms wide
XL2
4.19MHz
3.00
R35
1.49dc
3.0V p-p
CLKO 38.4kHz
IC402 pin9
1.49dc
3.0V p-p
XL403 38.4kHz (Radio Board)
IC5
3.00 (pin 1)
3.00 (pin 2)
0 (pin 3)
Reset
IC6
1.4 (pin 1)
3.00 (pin 2)
1.4 (pin 5)
VDD Supply
Table 5.4: Decoder Board Test Sequence
STEP
TEST POINT
R23
VDD
R35
38.4kHz POCSAG Clock
R1
4.19MHz Microprocessor Clock (every 500ms)
TM1205 Issue 2
REMARKS
Page 5 - 15
TLA 852/FLA 872
VOLTS
2.2V
0.19V
4ms
TIME
WAVEFORM AT C5
VOLTS
3V
4.19MHz WITHIN THE ENVELOPE
4ms
TIME
0V
WAVEFORM AT R1/C4
3V p-p 38kHz
VOLTS
1.49V
0V
TIME
WAVEFORM AT R35 AND IC402, PIN9
TAG11333-1
Figure 5.8: Decoder Board Waveforms
Page 5 - 16
TM1205 Issue 2
TLA 852/FLA 872
VOLTS
3V p-p
VOLTS
0V
0V
3V p-p
TIME
1.6ms
1.6ms
WAVEFORM AT PIN 38
TIME
WAVEFORM AT PIN 39
VOLTS
6V p-p
VOLTS
0V
0V
6V p-p
TIME
1.6ms
WAVEFORM AT PIN 40
VOLTS
1.6ms
TIME
WAVEFORM AT PIN 41
3V
0V
TIME
1.6ms
WAVEFORM AT PIN 45
TAG11132-1
Figure 5.9: Display Module Waveforms
TM1205 Issue 2
Page 5 - 17
TLA 852/FLA 872
33
48
32
49
µP
TR2, 4
TR401, 402, 403, 406
407, 410, 414
IC3
3 (C)
64
1 (B)
17
2 (E)
16
TR1, 3, 415
(1) 22
21(28)
( )
IC4
SONY
LCM
28
(Rear of
Module)
(NEC CONFIGURATION )
(IS SHOWN IN PARENTHESIS)
( )
(14) 7
8 (15)
51
A0
TEST
IC1
A2
SCL
VSS
SDA
SIGNAL
XVSS
XT
XTN
VSS
OUT
VDD
ATTN
SDI
SDO
SCK
AREA
RSTN
CLKO
BS2
BS3
VCC
A1
16
BS1
IC402
NC
IC5
Vdd
IC6
Vss
NC
24
OSC BASE
RF IN
OSC EMITT
GROUND
MIXER OUT
RSSI OUT
Vcc
RSSI IN
REG OUT
REG IN
BATTERY ALARM
IF IN
IC401
IF DE-COUPLE
IF DE-COUPLE
EXCEPT FOR THE LCD MODULE,
ALL DEVICES ARE VIEWED FROM ABOVE.
NOT TO SCALE.
FSK OUT
POWER SAVE
IF OUT
QUICK CHARGE
QUAD IN
SHAPING CAP
DET OUT
PRI SHAPING CAP
FILTER IN
12
13
FILTER OUT
TAG11264-1
Figure 5.10: Semiconductor Connection Details
Page 5 - 18
TM1205 Issue 2
TLA 852/FLA 872
Table 5.5: IC3 Microprocessor Pin Connections
Pin Number
Pin Name
Description
P30
PGM - programming input
P31
BEEP - output signal
P32
ROM-CE - CGROM (IC2) chip enable
P33
RAM-CE - SRAM (IC4) chip enable
P34
LCD-CS - Display chip select
P35
µP (IC3) low current mode switch
P36
Vibrate Motor - output signal
P37
Lamp - output signal
VSS
Ground
10-12
P40-P42
13,14,16,17
NC
Not Used
15
P45
µP (IC3) low current mode switch
SW1-SW3 - input signal
18-23,25-34,38,39 P50-P57,P60-P67,P02,P03 Address lines AD00-AD17
24
VSS
35
RESET
36
P00
AREA (No valid data) - input signal
37
P01
ATTN (Valid data) - input signal
40
VDD
VDD
41
X2
Xtal oscillator
42
X1
Xtal oscillator
43,46
VPP/IC,AVSS
44
NC
45
P04/XT1
POCSAG clock - input signal
47-54
D00-D07
Data lines
55
AVDD
56
AVR
Ground
57
P20
SDO - Data input signal
58
P21
SDI - µP info. to POCSAG decoder
59
P22
SCK - Data transfer clock
60
WR
Display and RAM - Read/write control
61
P24
LOWBAT - output signal
62,63,64
P25,P26,P27
TM1205 Issue 2
Ground
µP reset - input signal
Ground
Not Used
VDD
Serial Data input from EEPROM (IC1)
Page 5 - 19
TLA 852/FLA 872
Table 5.6: IC4 RAM Pin Connections
Pin Number
Pin Name
A14
Address line AD14
A12
Address line AD12
A7
Address line AD07
A6
Address line AD06
A5
Address line AD05
A4
Address line AD04
A3
Address line AD03
A2
Address line AD02
A1
Address line AD01
10
A0
Address line AD00
11
D0
Data line D00
12
D1
Data line D01
13
D2
Data line D02
14
VSS
15
D3
Data line D03
16
D4
Data line D04
17
D5
Data line D05
18
D6
Data line D06
19
D7
Data line D07
20
CE
RAM-CE - chip enable input
21
A10
Address line AD10
22
OE
Ground
23
A11
Address line AD11
24
A9
Address line AD09
25
A8
Address line AD08
26
A13
Address line AD13
27
WE
WR - RAM read/write control
28
VDD
VDD
Page 5 - 20
Description
Ground
TM1205 Issue 2
TLA 852/FLA 872
Table 5.7: LCD Display Pin Connections
Pin Number
2-6
Pin Name
NC
V5-V1
Description
Not Connected
LCD driver supply voltages
VDD
VDD
M/S
VDD
RESET
10
SCL
VDD
11
SI
VDD
12
P/S
VDD
13
CS1
LCD-CS - chip select
14
CS2
VDD
15
C86
Ground
16
A0
AD16 - display address input signal
17
WR
WR - LCD write enable input signal
18
RD
AD17 - read enable input signal
19
VSS
Ground
20-27
D0-D7
28-31
DYO, CLO, SYN, FR
Reset - input signal
D00-D07 - Data lines
Not Used
32
CL
33
OSC1
LCD Oscillator
34
OSC2
LCD Oscillator
35-37
T2, T1, VSS
Ground
Ground
38
CAP1+
DC/DC voltage converter capacitor 1
39
CAP1-
DC/DC voltage converter capacitor 1
40
CAP2+
DC/DC voltage converter capacitor 2
41
CAP2-
DC/DC voltage converter capacitor 2
42
VOUT
DC/DC voltage converter output
43
V5
LCD driver supply voltage
44
VR
Voltage adjustment terminal
45
VDD
46-50
51
TM1205 Issue 2
V1-V5
NC
VDD
LCD driver supply voltages
Not Connected
Page 5 - 21
TLA 852/FLA 872
5.8
RADIO ALIGNMENT PROCEDURE
5.8.1
Preparation
a)
Remove the Board Assembly from the Case (see paragraph 5.5.2).
b)
Install a 0 ohm resistor or a shorting link in the position for R456, to disable
the BEC.
c)
Disable the AGC circuit by connecting TP403 to 0 volts. Alternatively, lift
R409.
SIGNAL
GENERATOR
1kHz MODULATION
INPUT
AUDIO OUT
RF IN
HF
COUNTER
SINAD
METER
455kHz
OSCILLOSCOPE
P671A
10dB
ATTENUATOR
Figure 5.11: Radio Alignment Test Equipment
5.8.2
Alignment Procedure
a)
Configure the test equipment as shown in Figure 5.11. Set the signal
generator to the channel frequency with an output of -10dBm.
b)
Put the Board Assembly in the tray of the P671A Alignment Jig and connect
the frequency counter probe to TP405. Adjust CV405 to give a reading of
455kHz ±50Hz at the frequency counter.
c)
Adjust CV406 for maximum amplitude of the 455kHz signal on the
oscilloscope. A minimum of 500 millivolts should be achieved.
d)
Remove the AGC disable and assemble the Board Assembly in the case.
Remove the right hand label from the case back to expose the aerial trimmer.
Page 5 - 22
TM1205 Issue 2
TLA 852/FLA 872
e)
Put a known good battery in the unit (but leave the battery door off). Put the
unit in the P671A jig, fold the jig arm over the unit and lock the arm in
position.
f)
Connect the SINAD meter to the alignment pins on the P671A (refer to
Figure 5.12)
g)
Set the modulation of 1kHz to a deviation of 3 kHz and switch it ON. Adjust
CV404 to give 12dB sinad with minimum RF input. A reading of -98dB
should be achieved.
NOTE:
h)
Do not disturb the aerial during the next operation.
Carefully remove the Board Assembly from the case. Remove the BEC
disable 0 ohm resistor or the shorting link from R456 position. Carefully
assemble the Board Assembly in the case and put a new label on the case
back to cover the aerial trimmer access hole.
ALIGNMENT PINS
PROGRAMMING PINS
CV407
CV406
CV405
ARM
CV404
ARM LOCK
Figure 5.12: P671A Showing the Tuning Points
TM1205 Issue 2
Page 5 - 23
TLA 852/FLA 872
5.8.3
Pager Sensitivity Measurement (Coarse)
To determine the pager sensitivity, configure the test equipment as shown in
Figure 5.13 and do the procedure given in sub-paragraphs a) through e).
NOTE:
This is only an indication of sensitivity,which is dependent on the unit
under test being in a noise free environment.
P645
PC
NOTE:
DATA
SIGNAL
GENERATOR
THE DISTANCE BETWEEN THE
PC AND THE P671A MUST BE
GREATER THAN TWO METRES
RF IN
10dB
ATTENUATOR
TAG11331-1
Figure 5.13: Configuration for Coarse Sensitivity Measurement
5.8.4
a)
Set the signal generator to the channel frequency, at a deviation of 4.5kHz
and an output level of -85dBm.
b)
Install a known good battery in the pager and switch it ON.
c)
Put the pager in the P671A and send a sensitivity call from the P645.
Increase the signal generator output level, if necessary, to obtain a correctly
received call.
d)
Reduce the RF level in 1dB steps until the pager receives less than three
calls in five.
e)
Increase the RF level in 1dB steps until five consecutive calls are received.
An output level of -98dBm should be acheived.
Pager Sensitivity Measurement (Fine)
Configure the equipment as described in paragraph 5.8.3 but connect a P800 TEM
cell instead of the P671A. Follow the steps given in the TEM Cell Instructions for
the IEC method. Place the pager in the polystyrene block (refer to Figure 5.14)
positioned centrally in the TEM Cell, with the display facing the input end. A level
of -103dBm or better should be achieved.
Page 5 - 24
TM1205 Issue 2
TLA 852/FLA 872
20mm
60mm 20mm
14mm
52mm
80mm
ø 5mm
20mm
TAG11124-1
Figure 5.14: Polystyrene Block for TEM Cell Test - Dimensions
TM1205 Issue 2
Page 5 - 25
TLA 852/FLA 872
5.9
PROGRAMMING
5.9.1
General
The pager contains an EEPROM which holds unique data. The data may be
altered as shown in the following paragraphs.
5.9.2
Equipment
The following equipment is required:
5.9.3
P671A Alignment Jig
P669H Programming Software
Programming Cable
IBM PC or equivalent
Procedure
Program the receiver as follows:
a)
Remove the Battery Door from the Case Back.
b)
Put the unit face down in the tray of the P671A, lower the arm over the unit
and lock the arm in position.
c)
Use the Progamming Cable to connect the programming pins of the P671A
to the PC serial port. Refer to Figure 5.15 and connect the correct coloured
wire to each programming pin.
d)
Read the ‘Readme’ file contained in the relevant programming software. The
‘readme’ file describes how to use the programming facility.
CONNECT THE BROWN
WIRE TO THIS PIN
CONNECT THE BLUE
WIRE TO THIS PIN
P671A
Figure 5.15: Programming Lead Connections
Page 5 - 26
TM1205 Issue 2
TLA 852/FLA 872
SECTION 6
SPARE PARTS LIST
CONTENTS:
Page
6.1
6.1.1
6.1.2
6.1.3
6.1.4
ASSEMBLIES
Modules
Case Parts
Batteries
Battery Packs
6-1
6-1
6-1
6-2
6-2
6.2
6.2.1
6.2.2
6.2.3
6.2.4
6.2.5
6.2.6
6.2.7
RADIO BOARD COMPONENTS
Capacitors
Banded Capacitors
Crystal and Filters
Inductors
Resistors
Semiconductors
Miscellaneous
6-3
6-3
6-3
6-4
6-4
6-4
6-5
6-5
6.3
6.3.1
6.3.2
6.3.3
6.3.4
DECODER BOARD COMPONENTS
Capacitors
Resistors
Semiconductors
Miscellaneous
6-6
6-6
6-6
6-6
6-7
CAUTION
STATIC SENSITIVE DEVICES ARE USED IN THIS EQUIPMENT. CARE MUST BE TAKEN
WHEN HANDLING THESE DEVICES AS THEY MAY BE DAMAGED BY HIGH LEVELS OF
STATIC ELECTRICITY.
TM1205 Issue 2
Page 6 - 1
TLA 852/FLA 872
ITEM/CIRCUIT
REFERENCE
6.1
PART No.
FREQUENCY BAND INFORMATION
BAND 1
BAND 2
BAND 3
BAND 4
BAND 5
BAND 6
138.000
143.500
149.000
155.000
161.000
167.500
6.2
ASSEMBLIES
6.2.1
Modules
6.2.2
DESCRIPTION
143.499 MHZ
148.999 MHZ
154.999 MHZ
160.999 MHZ
167.499 MHZ
174.100 MHz
DECODER ASSEMBLY
0201-0954
CASE FRONT, RESTYLE, BLACK
CASE FRONT, BLACK
CASE FRONT, SOFT BLACK
CASE FRONT, RESTYLE, BLUE
CASE FRONT, BLUE
CASE FRONT, SOFT BURG99
CASE FRONT, GREY, OMPT
0301-0911
0301-0922
0801-0303
0301-0906
0301-0917
0801-0302
0301-0923
WINDOW, MULTITONE, NEW LOGO
WINDOW, MULTITONE
WINDOW, VODAFONE
WINDOW, ZAP!
WINDOW, FLAIR
WINDOW, OMPT MOROCCO
0961-5986
0961-5014
0961-5962
0961-5828
0961-5639
0961-5529
WINDOW, SYSTEL
WINDOW, ENERGONET, TLA 852
WINDOW, ENERGONET, FLA 872
0961-5764
0961-5611
0961-5794
CASE BACK MOULDING, BLACK
CASE BACK MOULDING, BLUE
BATTERY DOOR MOULDING, BLACK
BATTERY DOOR MOULDING, BLUE
BUTTON TLA STYLE 2 BLK CHEV
0801-0150
0801-0145
0801-0160
0801-0155
0801-0186
HOLSTER, BLACK
HOLSTER, BLACK, VODAFONE
BATTERY ALKALINE "AAA"
0801-0277
0801-0345
5601-0006
Case Parts and Battery
Page 6 - 2
TM1205 Issue 2
TLA 852/FLA 872
ITEM/CIRCUIT
REFERENCE
6.2.3
DESCRIPTION
PART No.
BATTERY CONTACT +VE
BATTERY CONTACT -VE SPRING
LANYARD (ELASTICATED)
GASKET, DISPLAY SEAL
SPACER MOULDING RUBBER VHF
7361-4862
7361-4861
7961-5055
2561-5007
0861-5209
SCREW 2.2mm x 6mm PAN HEAD, S/TAP
8216-2296
Miscellaneous
6.3
RADIO BOARD COMPONENTS
6.3.1
Capacitors
6.3.2
C403,410,412,414,472,473,484
C404,406,453,481
C407
C408,485,495
C418,423,425,444,450,452,469,
CHIP 10n ±10% 50V
CHIP 220p ±5% 50V
CHIP 27p ±5% 50V
CHIP 22p ±5% 50V
CHIP 100n ±10% 16V
3327-0025
3326-0031
3326-0020
3326-0019
3332-0014
C471,474,479,480
C426
C436,493,494,496
C448
C449
CHIP 100n ±10% 16V
CHIP 33p ±5% 50V
CHIP 22µ ±20% 4V
CHIP 3n3 ±10% 50V
CHIP 22n +80-20% 50V
3332-0014
3326-0021
3412-0005
3327-0019
3328-0009
C470
C483
C486
C490
C492
CHIP 1µ -20/+80% 16V
CHIP 560p
CHIP 68n
CHIP 47µ ±20% 6.3V
CHIP 4.7µ 6.3V
3301-0277
3326-0036
3332-0012
3412-0110
3412-0104
CV404,405,406,407
TRIMMER 10p, REAR ADJUSTMENT
3502-0018
Banded Capacitors
CCT REF
Band 1
Band 2
Band 3
Band 4
Band 5
Band 6
C401,445
100p
100p
100p
100p
100p
100p
C405, 455, 466
12p
12p
10p
10p
C409
LINK
LINK
LINK
LINK
C432
3p9
3p9
3p9
C446
1p
1p
C465
4p7
C467
18p
TM1205 Issue 2
6p8
6p8
LINK
LINK
3p9
3p9
3p9
1p
1p
1p
1p
4p7
4p7
4p7
4p7
4p7
15p
12p
10p
8p2
6p8
Page 6 - 3
TLA 852/FLA 872
DESCRIPTION
PART No.
DESCRIPTION
PART No.
1p ±0.25% 50V
3p9 ±0.25p 50V
4p7 ± 0p25 50V
6p8 50V
8p2 50V
10p ±0p5 50V
3326-0015
3326-0010
3326-0011
3326-0013
3326-0014
3326-0015
12p ±5% 50V
15p ±0p5 50V
18p ±0p5 50V
100p ±5% 50V
3326-0016
3326-0017
3326-0018
3326-0027
LINK (RES CHIP 0S)
3115-0001
ITEM/CIRCUIT
REFERENCE
6.3.3
DESCRIPTION
PART No.
FL401
FL402, 403
FL402, 403
FL404
CRYSTAL FILTER 21.4MHz
CERAMIC FILTER, SMD, 10/12.5kHz
CERAMIC FILTER, SMD, 20/25kHz
FILTER CHIP CDBC455CX25-TC
4001-0025
4018-0004
4018-0002
4003-0005
XL401
XL402
XL402
XL403
CRYSTAL 20.945MHz
CRYSTAL, GENERIC SPEC
CRYSTAL, GENERIC SPEC
MICRO CRYSTAL MX1V-TL 76.8 kHz
3915-0017
3948-*
3950-*
3922-0012
Crystal and Filters
* QUOTE CHANNEL FREQUENCY TO SIX DECIMAL PLACES
6.3.4
Inductors
CCT REF
Band 1
Band 2
Band 3
Band 4
Band 5
Band 6
L401
82n
82n
68n
68n
68n
56n
L406, 410
2µ2
2µ2
2µ2
2µ2
2µ2
2µ2
L407
100n
100n
100n
100n
100n
100n
L408
330n
330n
270n
270n
270n
270n
L409
560n
560n
470n
470n
390n
390n
L416
68n
68n
56n
56n
47n
47n
L417
47n
47n
39n
39n
33n
33n
L418
N/F
N/F
N/F
N/F
N/F
N/F
DESCRIPTION
2µ2 ±10%
39n ±10%
47n ±10%
56n ±10%
Page 6 - 4
PART No.
4103-0233
4117-0017
4117-0018
4117-0019
68n ±10%
82n ±10%
4117-0020
4117-0021
TM1205 Issue 2
TLA 852/FLA 872
6.3.5
6.3.6
6.3.7
DESCRIPTION
100n ±5%
270n ±5%
330n ±5%
390n ±5%
470n ±5%
560n ±5%
PART No.
4103-0254
4103-0264
4103-0266
4103-0268
4103-0270
4103-0272
ITEM/CIRCUIT
REFERENCE
DESCRIPTION
PART No.
R5, 8, 472-478
R401,403,439,470
R402,405
R404,438
R406
CHIP 0S 62m5W
CHIP 100S ±5% 62m5W
CHIP 18k ±5% 62m5w
CHIP 680S ±5% 62m5W
CHIP 1k ±5% 62m5W
3115-0001
3115-0050
3115-0104
3115-0070
3115-0074
R408
R410
R412
R416
R416
CHIP 330S ±5% 62m5W
CHIP 33S ±5% 62m5W
CHIP 3k3 ±5% 62m5w
CHIP 82k, 10/12.5kHz
CHIP 39k ±5% 62m5, 20/25kHz
3115-0062
3115-0110
3115-0086
3115-0120
3115-0112
R420,455,457,471
R425, 428, 429
R425, 428, 429
R425, 428, 429
R434,446
CHIP 100k ±5% 62m5W
CHIP 180k ±5% (512 BAUD)
CHIP 82k (1200 BAUD)
CHIP 39k ±5% (2400 BAUD)
CHIP 15k ±5% 62m5W
3115-0122
3115-0128
3115-0120
3115-0112
3115-0102
R440
R443
R444
R458,459
CHIP 220S ±5% 62m5W
CHIP 5k6 ±5% 62m5W
CHIP 2K7 ±5% 62m5W
CHIP 10S ±5% 62m5W
3115-0058
3115-0092
3115-0084
3115-0026
IC401
IC402
IC TK14590V
IC POCSAG DECODER
3825-0002
3820-0025
TR401,402,403,410
TR406
TR415
TR416
TRANSISTOR NE85619
TRANS PNP. BC808-40W
TRANS RN1305
TRANS 2SD1757KS
3601-0013
3602-0058
3611-0002
3602-0038
AERIAL, TOP, VHF
AERIAL, BOTTOM, VHF
HEADER 14-WAY
TRANSDUCER
5561-5254
5561-5255
4332-0002
5004-0007
Resistors
Semiconductors
Miscellaneous
AE401
AE402
PL401
SP401
TM1205 Issue 2
Page 6 - 5
TLA 852/FLA 872
ITEM/CIRCUIT
REFERENCE
DESCRIPTION
6.4
DECODER BOARD COMPONENTS
6.4.1
Capacitors
C3,6,8,10,14,19,20-25
C4,5
C9,11
C12,15
C13
C17,18,26
C 28 (FLA)
C 29 (FLA)
6.4.2
6.4.3
PART No.
CHIP 100n ±10% 16V
CHIP 27p ±5% 50v
CHIP 1n ±10% 50V
CHIP 47µ ±20% 6V3
CHIP 100p ±5% 50v
CHIP 1µ -20/+80% 16V
CHIP 100n ±10% 16V
CHIP 180p ±5% 50V
3332-0014
3326-0020
3327-0013
3412-0110
3326-0027
3301-0277
3332-0014
3326-0030
R1
R2-5,18,19,29
CHIP 1k5 ±5% 62m5W
CHIP 100k ±5% 62m5W
3115-0078
3115-0122
R6,7,17,26,27,30,
31,34-36
CHIP 10k ±5% 62m5W
3115-0098
R8
R9
R10
R11,21,22
R12,20
CHIP 47S ±5% 62m5W
CHIP 1k ±5% 62m5W
CHIP 18k ±5% 62m5w
CHIP 470k ±2% 62m5W
CHIP 150k ±2%
3115-0042
3115-0074
3115-0104
3118-0138
3118-0126
R13
R14,28
R15,16
R23,24,25,99,103
CHIP 680k ±2%
CHIP 1M ±2% 0603
CHIP 220S ±5% 62m5W
CHIP 100S ±5% 62m5W
3118-0142
3118-0146
3115-0058
3115-0050
D1
D4
D2 (FLA)
DIODE, CHIP BAT 74
DIODE RB715F
DIODE, CHIP BAV 99
3710-0002
3710-0005
3703-0001
IC1
IC2 (FLA)
IC4
IC5,6
IC 512X8 EEPROM
IC SP4425 EL LAMP DRIVER
IC 32KX8 SRAM
IC VOLTAGE DETECTOR 2V0
3818-0006
3818-0027
3821-0009
6003-0011
TR1
TR2,6,7
TR3
TR4,5
TR7 (FLA)
CHIP TRANS DTC115TUA
TRANS PNP. BC808-40W
TRANS RN1305
TRANS 2SD1757KS
TRANS PNP BC808-40W
3611-0004
3602-0058
3611-0002
3602-0038
3601-0058
Resistors
Semiconductors
Page 6 - 6
TM1205 Issue 2
TLA 852/FLA 872
6.4.4
Banded Component: IC3
TLA 852
STANDARD (LATIN)
0501-0224
0501-0211 (OTP)
3835-0017 (MASKED)
STANDARD (CYRILLIC)
3835-0012
0501-0212 (OTP)
3835-0018 (MASKED)
"ZAP!" (MASKED)
3835-0020
Z-PAGE
0501-0228
MOROCCO
0501-0198 (OTP)
3835-0010 (MASKED)
ITEM/CIRCUIT
REFERENCE
6.4.5
FLA 872
DESCRIPTION
PART No.
BAT2
LP1,2
SK1
SW1,2,3
T1
L25
CAPACITOR, POLYESTER, PAS621L-VL5
LAMP HE1-5VXXMA
HEADER DUAL ROW RECEPT14WAYSMD
SWITCH SMD KSR221G
TOROID SERIES 5CT
INDUCTOR 680FH 20%
3331-0002
5202-0007
4449-0002
4202-0026
5301-0001
4124-0018
XL1
CRYSTAL 4.194304MHz SMD
DIFFUSER, DISPLAY
DISPLAY LCD EMC-A0861-1(EPSON)
LABEL DISPLAY BLANK TLA850
MOULDING, LCD BEZEL (EPSON)
ELECTRO-LUMINESCENT PANEL
MOTOR VIBRATE (WITH BRACKET)
3915-0019
2361-5008
5206-0019
2061-5108
0861-4878
5261-6071
6502-0007
Miscellaneous
EL1
TM1205 Issue 2
Page 6 - 7
TLA 852/FLA 872
INTENTIONALLY BLANK
Page 6 - 8
TM1205 Issue 2
TLA 852/FLA 872
SECTION 7
DIAGRAMS
CONTENTS
Source Drawing
Page
7.1
Radio Board (PCB 3061-5374 Iss. 1)
Circuit Diagram (Sheet 1 of 2)
2961-5375 Iss. 5
(Sheet 2)
7-3/4
7.2
Radio Board (PCB 3061-5374 Iss. 1)
Circuit Diagram (Sheet 2 of 2)
2961-5375 Iss. 5
(Sheet 1)
7-5/6
7.3
Radio Board (PCB 3061-5374 Iss. 1)
Component Layout - Side 1
0261-5373 Iss. 2
(Sheet 1)
7-7/8
7.4
Radio Board (PCB 3061-5374 Iss. 1)
Component Layout - Side 2
0261-5373 Iss. 2
(Sheet 2)
7-9/10
7.5
Decoder Board (PCB 3061-5169 Iss. 1)
Circuit Diagram
2961-5167 Iss. 2
7-11/12
7.6
Decoder Board (PCB 3061-5169 Iss. 1)
Component Layout
0261-5168 Iss. 1
7-13/14
7.7
Decoder Board (PCB 3061-5169 Iss. 1)
Component Layout
0261-5168 Iss. 1
7-15/16
7.8
Decoder Board With EL Display (FLA)
Circuit Diagram (PCB 3061-5880 Iss. 1)
2961-5878 Iss. 1
7-17/18
7.9
Decoder Board With EL Display (FLA)
Component Layout Side 1
(PCB 3061-5880 Iss. 1)
0261-5879 Iss. 1
Shts. 1 & 3
7-19/20
7.10 Decoder Board With EL Display (FLA)
Component Layout Side 2
(PCB 3061-5880 Iss. 1)
0261-5879 Iss. 1
Sht. 2
7-21/22
TM1205 Issue 2
Page 7 - 1
TLA 852/FLA 872
INTENTIONALLY BLANK
Page 7 - 2
TM 1205 Issue 2
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File Type                       : PDF
File Type Extension             : pdf
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PDF Version                     : 1.3
Linearized                      : No
Creator                         : Preliminary Pages for TM1205
Create Date                     : 29 June 1999 14:41
Title                           : TM1205pr
Author                          : Unknown
Producer                        : Acrobat PDFWriter 3.02 for Windows
Subject                         : TM1205 Preliminary Pages
Modify Date                     : 2002:12:05 08:41:18Z
Page Count                      : 86
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FCC ID Filing: E86TLA-FLA

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