Telex TR-200, TR-200 Series Service Manual
-)
TELEX
Service
Manual
PROFESSIONAL
WIRELESS
INTERCOM SYSTEM
TR-200
SERIES
TELEX,
Table of Contents
Page
CHAPTER 1- GENERAL INEORMATION 1-1
GENERAL DESCRIPTION
SPECIFICATIONS TR-200
CONTROLS
External Controls
Internal Controls
CHAPTER 2
GENERAL
CHAPTER 3 . TRANSMIT AND
TR-200 INSTRUMENT DISASSEMBLY
TRANSMIT BOARD
CIRCUIT DESCRIPTION
ALIGNMNENT PROCEDURE
VOLTAGE TABLES
RECEIVE BOARD
CIRCUIT DESCRIPTION
ALIGNMENT PROCEDURE 3-5
OPTIONS - CIRCUIT DESCRIPITION 3-5
I
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\
!
VOLTAGE TABLES
ELECTRICAL PARTS RECEIVE PCB ASSEMBLY (879977-*)
ELECTRICAL PARTS TRANSMIT PCB ASSEMBLY (879976-*)
AND
CONNECTIONS
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IDENTIFICATION OF CIRCUIT BOARD VERSION
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RECEI~
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TRANSMIT BOARD
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RECEIVE BOARD
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~-~~
CIRCUIT BOARDS
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1-1
1-2
1-3
1-3
1-4
2-1
2-1
3-1
3-1
3-3
3-3
3-3
3-4
3-5
3-5
3-6
3-15
3-17
Figure
1-1
1-2
1-3
2- 1
3- 1
3-2
List
Headset XLR Connector Wiring
External Controls, TR-200
Internal Controls, TR-200
Version Flow Chart
Exploded View
P.C.
Board Assembly - Receiver (879977-) Component Layout
(Component Side)
P.C.
Board Assembly - Transmit (879976-) Component Layout
(Component Side)
Transmit P.C. Board Assembly Component Layout (Foil Side View)
Receive
Schemat~c Diagram TR-200 Version 4
Schematic Diagram TR-2M) Version 3
Schematic Diagram TR-200 Version
Schematic Diagram TR-200 Version 1
P.C.
.
of
TR-200 3-2
Board Assembly Component Layout (Foil Side View)
.
of
Illustrations
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Page
1-3
1-3
1-9
2-1
3-9
3-9
3-10
3-10
3-11
3-12
3-13
3-14
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1
CHAPTER
1
GENERAL INFORMATION
GENERAL
The Telex Models TR-200 and TR-200P Belt-pack
Transceivers
one receive channel.
The TR-200 is a portable unit which communicates
in
full duplex with either the BTR-200 base station
or a mirror image TR-200.
Push-to-Talk with Lock-to-TaLk feature switch for
the TR-200 and Push-to-Transmit
Transmit feature for the TR-200P.
DESCRIPTION
are
designed with one transmit and
with
Lock-to-
The TR-200
transmit mode with the audio, to
a switch. As many as four TR-200 belt-pack
transceivers can operate in a fully duplex network
with
one Telex Model BTR-200 or BTR-200
Base Station.
The TR-200P Transceiver operates in the Push-to-
transmit mode (the transmit and talk function
activated together). Any number of TR-200P
transceivers can be used
with one BTR-200 or BTR-200
Operate only one transmitter at a time. Attempting
to use two transmitters simultaneously on the same
channel
Transceiver operates
will
cause interference.
in
the continuous
talk,
activated by
in
a half-duplex network
11
Base Station.
II
are
SPECIFICATIONS
Power Requirements
Current Drain
Temperature Range
Dimensions
Weight
Transmit Antenna
Receive Antenna
RF
RF
RF
Modulation
Modulation Limter
Modulation Frequency Range
Microphone Audio Input
Microphone Input Sensluvlty
Radiated Harmonics and Spurious Emissions
FCC
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Frequency Range
Frequency Stability
Power Output
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TR-200
Overall
6
AA
cells (Alkaline,
Nickel Cadmium Optional
4
to 130'~ (-20'~ to 55'~)
4.25" W x 4.125" H x 2.0" D
(108mm
1302 (369g) with batteries
114-wave wire (attached)
114-wave wire (attached)
Transmit
C Controlled, 0.005%
..........................................
115 micro-seconds Pre-emphasis
2 mV Dynamic, 4 mV Electret
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Type Accepted Under Parts 90 and 74
FM,
Exceeds FCC Specifications
NEDA,
x
105mm x 51mm)
5000
Internal Compressor
300
to 5000 Hz =dB
30 to 3500 ohms
MN
1500)
typ c 65
150-216 MHz
50 mW Typical
Hz
mA
deviation,
-45 dBC,
-
cp-~~~~
I
%
Receive
RF
Frequency Range
RF
Frequency Stabiltiy
RF
IF
Image
Squelch Quietmg
Squelch Threshold
~
Signal:io-No~se Raao 90 dB
Audio Output
Distortion
FCC
...
Sensihvity
Selectivity
Rejection
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Dual Conversion Superheterodyne,
st Controlled, O.QOS%Type
Less than 0.5 pV for 12 dB SINAB
3 dB at 30 kHz (Ceramic Filter)
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32 mW into
Less than 1% at Rated Output
Notification Under
150-216 MHz
70 dB or better
1.OpV (Internal)
~~
~
600
ohms (Headset)
FM
90 dB
Part
15
I
I
CONTROLS
AND
CONNECTIONS
External
Volume OFJ?/ON Control:
trol serves
control. described for
Low Battery and Overmodulation Indicator
LED:,
Low Battery Indicator:
battery check circuit. When the power switch is
placed in the
one time
will cause the
and
illumination at
Overmodulation Indicator:
LED
talk mode,
the
Controls (Refer To Figure
This thumbwheel con-
as
both
an
off/on switch and
This
is
"ON"
position the
if
the battery is good. A poor bkttery
LED
to illuminate continuously
a
bad or unusable battery will not cause any
all.
as
the low battery indicator.
if
the microphone gain
LED
will illuminate when talking.
LED
Uses the same
1-2)
as
a volume
part of the
will flash
During
is
too high,
the
Push-To-Talknock-To-Talk
TR-200,
Model
and audio function and otherwise operates as
Talk LED Indicator:
illuminated whenever the
200
Headset Jack: A four pin
1nput.Output.
ferent Telex Model Headsets. Compatible with
other intercom headsets with four pin
tors that are wired
MICROPHONE
GROUND
this switch enables the
TR-200J?,
or transmit function on the
WCROPHONE
AUDIO
Switch:
talk
this switch enables the transmit
TR-200.
cabeled
talk
function on the
TR-2DOP
XLR
The headset jack will accept six dif-
as
shown in Figure 1-1.
02
9
D
Figure
1-1
For Model
function. For
"talk")
Will be
is enabled.
connector for
XLR
connec-
AUDIO
OUT
BALANCED
TR-
&&
BELTCLI
Headset
LOW BATTERYIOVERMODULATION
i
l..
d
--
INDICATOR LED
rTALK LED INDICATOR
f
USH-TO-TALK OFFION
LOCK-TO-TALK SWITCH
/
HEADSET
~~~.
/
XLR
Connector Wiring
.
"
n
RECEIVE ANTENNA
1
CONTROL
External
Figure
Controls,
1-3
1-2
TR-200
DYNAMICIELECTRET MICROPHONE
BATTERY COMPARTMENT
GAIN CONTROL
Internal Controls
(Refer
To
Internal
Figure
Figure
Controls,
1-3)
1-3
TR-200
D~amiclElectret
Switch:
This
switch allows
selection of "D" when using a Dynamic
E"
Belt
Clip:
Combination Belt CliplSattery Cover.
Access to Battery Compartment, Microphone
Gain
Microphone or"
Microphone.
when using an Electret
Control and DynamicIElectret Switch is ac-
complished by removal of belt clip via a quick
-
release 114
lvlicrophone
-
turn
Gain
fastener.
-
-
Control:
-
-
Screwdriver adjus-
table by removing belt clip and prying out the smd
rubber plug
to
the right of the screw boss.
NOTE:
intercom are dynamic microphones. Unit is
shipped* the*" position.
Battery Compartment:
removable battery holder.
All
Telex headsets that are used with this
Holds
6
AA
batteries in a
CHAPTER
2
IDENTIFICATION OF CIRCUIT BOARD
GENERAL
Version 1 units may be identified by the absence of
two 1.2
board assembly to the headset connector. Versions
2,
following the
later versions, the one
board)
this part is
board) wilI be a wire jumper or zero ohm resistor.
This part is
pH
chokes in the cable connecting
3,
and 4 have two such chokes immediately
P.C.
board connector.
in
is
4.7
0.1
47
pF
is
version
pE
On version 4 only
K
on
all
earlier versions.
which
2.
C45
On
versions 3 and
Of
R45
the
the three
(transmit
(trpsmit
P.C.
4
VERSION
TWO 1
-2pH
CHOKES YES OF 0.1pF
IN
LINE
h0
VALUE VALUE
.
c45
TRANMIT
BOARD BOARD
4.7pF
VERSION
2
Figure
Version
Flow
2-1
Ch-irt
OF
R45
TRANSMIT
JUMPER
VERSION 4
2-112-2
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