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

							xv
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 with no external
memory (non-FLASHport operation).
CBI (Customer Board Initialization) When the controller board is received, it will
need a serial from the defect unit. The serial is manually entered via the RSS
prior to proceeding any further with the replacement process.
D/ADigital to Analog converter; converts a digital value to a corresponding dc
voltage value.
DTMFDual Tone Multi-Frequency.
DPLDigital Private-Line.
FirmwareSoftware or a software/hardware combination of computer programs and data,
with a fixed logic configuration stored in a read-only memory; information can
not be altered or reprogrammed.
FGUFrequency Generation Unit.
FlashcodeA Motorola term (model option definition code) that determines what
FLASHport options are in a radio.
FLASHportA Motorola term that describes the ability of a radio to change memory. Every
FLASHport radio contains a FLASHport EEPROM memory chip that can be
software written and rewritten to, again and again.
ICIntegrated Circuit.
ISWInbound Signalling Word; data transmitted on the control channel from the
subscriber unit to the central controller.
LTRLogic Trunked Radio; a registered trademark of E.F. Johnson Company.
MCUMicroControl Unit.
MDCMotorola Digital Code.
OMPACOver-Molded Pad-Array Carrier; a Motorola custom IC package, distinguished by
the presence of solder balls on the bottom pads.
Open ArchitectureA controller configuration that utilizes a microprocessor with extended ROM,
RAM, and EEPROM, (FLASHport capable).
OSWOutbound Signalling Word; data transmitted on the control channel from the
central controller to the subscriber unit.
PC BoardPrinted Circuit board.
PLPrivate-Line® tone squelch; a continuous sub-audible tone that is transmitted
along with the carrier. 
						

							xvi
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.
RSSIReceived signal strength indicator; a dc voltage proportional to the received rf
signal strength.
RX DATARecovered digital data line.
SLICSupport-Logic IC; a custom gate array used to provide I/O and memory
expansion for the microcontroller.
SmartRibUse in conjunction with the RSS to read the Flashcode and Model Number, and
to flash upgrade radios.
SoftpotSoftware potentiometer; a computer-adjustable electronic attenuator.
SoftwareComputer programs, procedures, rules, documentation, and data pertaining to
the operation of a system.
SquelchMuting of audio circuits when received signal levels fall below a pre-determined
value.
SRAMStatic-RAM chip used for volatile, program/data memory.
Standby ModeAn operating mode whereby the radio is muted but still continues to monitor
data.
TOTTime-Out Timer; a timer that limits the length of a transmission.
TPLTone Private-Line; Continuous Tone Coded Squelch System (CTCSS), industry
standard.
TSOPThin Small-Outline Package.
µCMicrocontrol unit (see MCU).
VCOVoltage-Controlled Oscillator; an oscillator whereby the frequency of oscillation
can be varied by changing a control voltage.
VSWRVoltage Standing Wave Ratio. 
						

							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 applicable 
manuals available separately. To help you with your selection, a list is 
provided in this manual, titled “Related Publications Available 
Separately.”
Special notices are incorporated into the text, alerting you to safety 
hazards and suggesting procedures. These notices are divided and 
labeled according to the information they contain so that you can 
become immediately aware of the type of information being 
presented. The three classifications are: WARNINGS, CAUTIONS, and 
NOTES.
 
NOTE:This is an operational procedure, practice, or 
condition, etc., which is essential to 
emphasize.
This is an operational procedure, practice, or 
condition, etc., which may result in injury or 
death if not carefully observed.
!
W A R N I N G
!
!
C a u t i o n
This is an operational procedure, practice, or 
condition, etc., which may result in damage to 
the equipment if not carefully observed. 
						

							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 column, the specific Motorola model listed is either a 
unique item or no substitution is recommended.
Table 1 Recommended Test Equipment
MOTOROLA
MODEL NUMBERDESCRIPTION CHARACTERISTICS APPLICATION
R2600 Series 
R2670 (for trunking)System Analyzer This monitor will substitute 
for items with an asterisk (*)Frequency/deviation meter and 
signal generator for wide-range 
troubleshooting and alignment
*R1097A Digital Multimeter 4,000 counts
Tr u e  R M S  M e t e r i n g
0.3% basic accuracyDigital voltmeter recommended 
for ac/dc voltage and current 
measurements
*R1150E Code Synthesizer Injection of audio and digital 
signalling codes
*R1527A Portable Test Receiver Counter; CTCSS, DCS, and 
DTMF decoderPortable Radio Monitor
R1368A Dual-Trace
Oscilloscope20MHz bandwidth (some 
system analyzers, R2000 
series, are 15MHz bandwidth)
5mV to 5V/divisionWaveform measurements
*S1350C
*ST1213B (VHF)
*ST1223B (UHF)Watt Meter
Plug-in Element
RF Dummy Load50-ohm, ±5% accuracy
10 Watts, maximum
0-1000MHz, 300WTransmitter power output
measurements
R1065 Load Resistor 10-watt Broadband For use with Wattmeter
S1339A RF Millivolt Meter 100µV to 3V rf
10kHz to 1.2GHzRF level measurements
*R1013B or
*R1370ASINAD Meter
SINAD Meter V/RMS RMS Audio VoltmeterReceiver sensitivity
measurements
S1347D or
S1348D (programmable)DC Power Supply 0-20Vdc, 0-5 Amps
current limitedBench supply for 7.5Vdc 
						

							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 back of this manual.
Field ProgrammingThis family of radios can be aligne d and programmed in the field. This 
requires specific equipment and special instructions. Refer to the 
applicable “Radio Service Software Users Manual” for complete field 
programming information. 
						

							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 
housing is removed. 
RTX-4005B or both 
RTX-4005A / RPX-4665A Portable Test Set
Field Modification Kit Allows switching for radio testing.
RLN-4460A Portable/Mobile Test Set Provides more convenient testing of mobiles and  portables.
RLN-4008B Radio Interface Box (RIB) Enables  communications between the radio and the
computer’s serial communications adapter.
RLN-1015C
0180302E27
3080390B48 Smart RIB
Power Supply
Computer Interface Cable Used to read Flashcode.
Used to supply power to the Smart RIB.
Connects computer serial adapter to Smart RIB.
0180357A57
0180358A56 Wall-mounted Power Supply 
Wall-mounted Power Supply Used to supply power to the RIB (120 VAC).
Used to supply power to the RIB (220 VAC).
3080369B71
3080369B72 Computer Interface Cable Use B72 for the IBM PC AT (7-pin). All other IBM 
models use B71.Connects the computer’s serial 
communications adapter to the RIB (25-pin).
RKN-4036D Cloning Cable Allows a radio to be duplicated from a master radio  by transferring programmed data from one radio to 
another (HT 1000/MT 2000 Models Only).
RVN-4097L Radio Service Software Software on 3-1/2 in. and 5-1/4 in. floppy disks.
RVN-4098G Radio Service Software (HT/JT 1000/VISAR Models 
Only) Software on 3-1/2 in. and 5-1/4 in. floppy disks.
RVN-4138B Radio Service Software MTXLS Model Software on 3-1/2 in. and 5-1/4 in. floppy disks.
5880348B33 SMA to BNC Adaptor Adapts radio’s antenna port to BNC cabling of test  equipment.
RLN-4201B Battery Tester Tests battery charge.
RLN-4048A Battery Tester Adapter Adapts HT 1000, JT 1000, MT 2000, MTS 2000, and  MTX Series radio batteries to the RLN-4201 Battery 
Te s t e r.
RTL-4208A RF Probe 50-ohm, high-frequency probe.
RT-5144/48/0
RT-5144/48/2 Test Probe (black)
Test Probe (red) Needle-fine test probes for high-density circuitry. 
						

							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 
removal of surface-mounted devices. Removes RF 
PA’s .
0180356B79 Solder/Desolder Station For so ldering and desoldering thru-hole 
components.
0180372E51 Illuminated Magnifying  System
0180386A82 Anti-static Grounding Kit Used during  all radio assembly and disassembly 
procedures.
6680384A98 Brush
1010041A86 Solder (RMA type), 63/37,  0.020 diameter, 1 lb. spool
0180303E45 SMD Tool Kit Kit includes chemicals and hand tools required to  do many SMD rework procedures.
6680334E07 Chassis/Front Cover  Separation Tool Used to pry the chassis away from the front cover 
during disassembly.
6680334E08 Flex Connector Opening Tool Used to  raise the sliding portion of the flex 
connectors. 
						

							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.
SetupSupply voltage can be connected from the battery eliminator. The 
equipment required for alignment procedures is connected as shown 
in the Radio Alignment Test Setup diagram.
Initial equipment control settings should be as indicated in the 
following table, and should hold for all alignment procedures except 
as noted in Table 4.
*  When testing TX deviation, where the modulation is greater than 
1kHz, set the Service Monitor low pass filter (LPF) to 15kHz.
**  The Test Set MT/PL switch controls internal/external audio 
switching.
Te s t  M o d e
RF Test Mode,
HT 1000/JT 1000 RadiosNOTE:This note applies to software version R02.09 
and earlier. If the radio is placed in TEST MODE  Table 4 Equipment Initial Control Settings
SERVICE MONITOR TEST SET POWER SUPPLY
Monitor Mode: Pwr Mon
RF Attn: –70
AM, CW, FM: FM
Oscope Source: Mod
Oscope Horiz: 10mSec/Div
Oscope Vert: 2.5kHz/Div
Oscope Trig: Auto
Monitor Image: Hi
Monitor BW: Nar
Monitor Squelch: mid CW
Monitor Vol: 1/4 CWSpkr set: A
Spkr/load:
Speaker
PTT: OFF
(center)Voltage: 7.5Vdc
DC on/standby:
Standby
Vol t Ra n g e : 1 0
Current: 2.5 
						

							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 
system and, therefore, the internal microcontroller will not key the 
transmitter nor unmute the receiver. This prevents the use of normal 
tune-up procedures. To solve this problem a special routine, called 
TEST MODE or “air test,” has been incorporated in the radio.
To enter test mode:
1. Turn the radio on.
2. Within ten seconds after the self test is complete, press the 
monitor button (side button 3, SB3) five times in succession. After 
the fifth press:
a. (HT 1000 radios), a tone is emitted to indicate that the rf test 
mode has been entered.
b. (JT 1000 radios), the display will show the firmware version of 
the microprocessor for two seconds, emit a tone, then display 
TEST MODE). 
3. Each additional press of SB3 will advance to the next test channel. 
(refer to Table 6), and a corresponding set of tones will indicate the 
channel.
4. Pressing SB2 will scroll through and access test environments as 
shown in Table 5.
NOTE:Transmit into a load when keying a radio 
under test.
To exit test mode, turn the radio off then back on.
Table 5 Test Environments, HT 1000/JT 1000 Radios
NO. OF
BEEPSDESCRIPTION FUNCTION
1 Carrier Squelch RX: if carrier detected
TX: mic audio
3 Tone Private-Line RX: unsquelch if carrier and tone
       (192.8Hz) detected
TX: mic audio + tone (192.8Hz)
4 Digital
Private-LineRX: unsquelch if carrier and digital code
       (131) detected
TX: mic audio + digital code (131)
       detected