Motorola Two Way Portable Radio Ht1000 Jt1000 Mt2000 Mts2000 Mtx Series 6881200c75 B Manual

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Glossary
A/DAnalog to Digital converter; converts an instantaneous dc voltage level to a
corresponding digital value.
ALCAutomatic Level Control; a circuit in the transmit RF path that controls RF
power amplifier output, provides leveling over frequency and voltage, and
protects against high VSWR.
CMOSComplementary metal-oxide semiconductor.
ChannelDefines conventional transmit and receive frequencies and muting conditions.
Closed ArchitectureA controller configuration that utilizes a microcontroller...

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PLLPhase-Locked Loop; a circuit in which an oscillator is kept in phase with a
reference, usually after passing through a frequency divider.
PTTPush-To-Talk; the switch located on the left side of the radio which, when
pressed, causes the radio to transmit.
RegistersShort-term data-storage circuits within the microcontrol unit or programmable
logic IC.
RESETReset line; an input to the microcontroller that restarts execution.
RF PARadio Frequency Power Amplifier.
RSSRadio Service Software....

1
Introduction
1
This manual includes safety information, model charts, specifications, 
fundamental disassembly/reassembly procedures; schematic diagrams, 
printed circuit board details, flex circuit diagrams, and several parts 
lists to completely cover the HT 1000, JT 1000, MT 2000, MTS 2000, 
and MTX series radios. Hereafter, the text will refer collectively to these 
radios as “this family of radios.” For maintenance/troubleshooting, 
theory, accessories, and operation of the radio, refer to the...

2
     
Notes 

3
Test Equipment,
Service Aids, and Tools
2
Recommended Test 
EquipmentThe list of equipment contained in Table 1 includes all of the standard 
test equipment required for servicing two-way portable radios, as well 
as several unique items designed specifically for servicing this family 
of radios. Battery-operated test equipment is recommended when 
available. The “Characteristics” column is included so that equivalent 
equipment may be substituted; however, when no information is 
provided in this...

4
Service Aids and 
Recommended ToolsRefer to the “Service Aids” in Table 2 and “Recommended Service 
Tools” list in Table 3 for a listing and description of the service aids and 
tools designed specifically for servicing this family of radios, as well as 
the more common tools required to disassemble and properly 
maintain the radio. These kits and/or parts are available from the 
United States and Canada  Radio  Products Services Division  listed in  the 
“Replacement Parts Ordering” section at the...

5
The following table lists service aids recommended for working on this 
family
 of radios. These items are  available  from Radio Products Services 
Division.
Table 2 Service Aids
MOTOROLA PART NO. DESCRIPTION APPLICATION
Servicers Video Tape Video Tape Includes Radio Introduction.
RKN-4035D RIB/Radio/test set cable Connects radio to RTX-4005B Test Box and RIB.
RLN-1014A Battery Eliminator Interconnects radio to power supply.
RLN-1018A Test Fixture Provides for trou bleshooting of the radio when the...

6
Service ToolsThe following table lists the tools recommended for working on this 
family of radios; these tools are also available from Motorola. The 
R-1319A solder/desolder workstation requires the use of some reflow 
nozzles which are  included  with the workstation.
Table 3 Recommended Service Tools
MOTOROLA PART NO. DESCRIPTION APPLICATION
R1319A Chip Master Surface Mount  Device (SMD) Rework Station Temperature-controlled, self-contained soldering/
desoldering repair station for installation and...

7
Transceiver
Performance Testing
3
GeneralThe HT 1000, JT 1000, MT 2000, MTS 2000, and MTX series radios 
have been prepared to meet published specifications through their 
manufacturing process, with the use of laboratory-quality test 
equipment of highest accuracy. The recommended field service 
equipment approaches the accuracy of the manufacturing equipment 
with a few exceptions. Accuracy of the equipment must be maintained 
in compliance with the manufacturer’s recommended calibration 
schedule....

8with OptionMate interface plug enabled 
through the HT 1000 RSS, TX and RX audio 
will be muted. Do not test Analog Voice 
Security (AVS) installed radios in the TEST 
MODE.
When the HT 1000/JT 1000 radio is operating in its normal 
environment, the radios microcontroller controls the RF channel 
selection, transmitter key-up, and receiver muting. However, when the 
unit is on the bench for testing, alignment, or repair, it is removed 
from its normal environment. It cannot receive commands from its...