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

							49 reflow, and may inadvertently move. Be careful when performing the 
following procedure.
Refer to Figure 17 for RF PA nomenclature.
To Remove the RF PA, add flux to the leads of the device, and use a soldering iron and pair of 
tweezers to heat and lift each lead free and clear of its respective solder 
pad on the circuit board. Use the R-1319 Rework Station and the heat- 
focus head designed especially for removal of the RF PA. Attach the 
heat-focus head to the chimney heater. Adjust the temperature control 
to approximately 415 degrees F (215 degrees C) 445 degrees F (230 
degrees C) maximum. Apply solder paste to the exposed solder pads 
under the PA. Place the circuit board in the circuit board holder, and 
position the RF PA under the heat-focus head. Lower the heat-focus 
head until it is approximately 1/8”-1/4” (0.3cm-0.6cm) above the PA 
cover. Turn on the heater and begin the reflow cycle. Heating time 
should not be less than two minutes.
Once the part has reflowed, before trying to remove the PA, carefully 
lower the circuit board holder as follows:
Loosen the thumbscrew on the shaft of the circuit board holder,
push the spring-loaded holder down and away from the heat-focus 
head, and 
retighten the thumbscrew with the holder in the bottomed 
position. 
G r a b  t h e  PA  w i t h  a  l a r g e  p a i r  o f  t w e e z e r s  a n d  r e m o v e  i t  f r o m  t h e  c i rc u i t  
board. Let the circuit board cool for approximately two minutes. Then 
remove the circuit board from the circuit board holder.
To Replace the RF PA;if necessary, add solder to the PA ground plane on the printed circuit 
board. Then clean each PA lead solder pad on the circuit board to 
ensure alignment of the new RF PA. Prepare the sight by using solder 
wick and a soldering iron to remove all solder from the solder pads. 
Clean the solder pads with alcohol and a small brush. Dry and inspect. 
Ensure that all solder is removed.
Once the preparation is complete, place the circuit board back in the 
circuit board holder. Add solder paste flux to the ground plane and to 
the leads’ solder pads. Once the flux is applied, place the new RF PA on 
the circuit board, making certain that the PA heatsink sits flush on the 
board. Position the heat-focus head over the RF PA and lower it to 
approximately 1/8”-1/4” (0.3cm-0.6cm)) above the PA cover. Turn on 
PA Cover
LeadsSlab
Solder
Pads
Figure 17  RF PA Nomenclature 
						

							50the heater and begin the reflow cycle. Heating time should not be less 
than two minutes.
Once the RF PA reflows, raise the heat-focus head and wait 
approximately two minute for the part to cool. Remove the circuit 
board and inspect the solder joint between the slab and the ground 
plane. No cleaning should be necessary. Use the soldering iron and add 
solder to each of the RF PA leads and associated pads. Inspect the lead/
pad bond for opens and solder shorts. 
						

							51
Exploded Views
8
There are several models in this family of radios: HT 1000, JT 1000, 
MT 2000, MTS 2000, and MTX Series radios.The exploded view diagrams 
in this section illustrate this family of radios by capturing them into one 
of four categories: 
basic radios
top-display radios
keypad radios
uni-board radios 
Determine which category describes your unit, and use the appropriate 
exploded view to help identify components with description and
Motorola part number.  
						

							52
Basic Radios and Basic Radios with 
Option Mate Optional Front Cover
ITEM
NO.MOTOROLA
PA R T  N O .DESCRIPTION
1 4505896U01 LEVER, PTT
2 3205902U01 SEAL, PTT, and ACTUATOR for S404, S405, 
S406, and S408
3A
3B1505627V05
or 1505627V03
 1505637V06
or 1505637V07COVER, Front
COVER, Front; OptionMate
COVER, Front; DTMF
COVER, Front; DTMF OptionMate
4 - - - - - - - - - - LABEL, Agency Approval; not field 
replaceable
5 3305183R55 LABEL, Motorola
6 3305183R56 LABEL, HT1000
7 3505535X02 FELT, Speaker
8 See Note 1 SPEAKER (LS401)
9 0705470V01 BRACKET, Speaker Retainer
10 See Note 1 MICROPHONE (MK401)
11 1405330W01 BOOT, Microphone
12 8405310W04  FLEX, Front Cover/Display
13 8405333W03 FLEX, Controls
14 3905517V01 POPPLE, PTT (p/o S406)
15 3605253V01 KNOB, On/Off/Volume
16
16A3605254V02
or 3605254V01
 3605636V01KNOB, Frequency; 2-Freq. Radios
KNOB, Frequency; 16-Frequency Radios
KNOB, Frequency; OptionMate
17
17A1305872U02
 or 1305872U01
 1305698V01ESCUTCHEON, Control Top; 2-Freq. Radios
ESCUTCHEON, Control Top; 16-Freq. Radios
ESCUTCHEON, Control Top; OptionMate
18 3205160W01 SEAL, Actuator; for S101
19 2205159W01 PIN, Actuator; for S101
20 3205514W01 SEAL, Accessory Connector
21 3205177Z01 SEAL, Control Top 
22 3205178Z01 SEAL, Emergency Button
23 2705877U01 HOUSING, Switch
24 See Note 1 SWITCH, Toggle (S402)
25 See Note 1 POTENTIOMETER/SWITCH, On/Off/Volume 
Control (R401/S403)
26 3905329W01 POPPLE, Emergency Button27 See Note 1 LED (CR400A/CR400B)
28 See Note 1 SWITCH, Frequency (S401)
29 1505632V01 COVER, Switch Housing
30 - - - - - - - - - - SPRING, PA; not field replaceable, order front 
shield (item 37)
31 4205507X01 STRAIN RELIEF
32 See Note 1 CONNECTOR, Strip (P301/P704)
33 See Note 2 PLUG, Connector (P404)
34 3205820V02 SEAL, Connector Plug
35 - - - - - - - - - - LABEL, Rear; Information; not field
replaceable 
36 3205176Z01 O-RING, Contoured/SEAL, Antenna
37 2605891U03
or 2685351C01SHIELD, Front (earlier radios)
SHIELD, Front (latest radios; requires CLIPs, 
Locking: 4285351C01 [Numbered 1, 1 req’d] 
and 4285351C02 [Numbered 2, 2 req’d])
38 See Note 1 SWITCH, RF (S101)
39 - - - - - - - - - - LABEL, Barcode; not field replaceable
40 4105266V01 SPRING, RF Switch
41 4405524V01 PISTON, RF Switch
42 1405307X01 INSULATOR
43 1505892U06 CHASSIS (Rear Cover)
44 3905838V01 CONTACT, Antenna Shield Ground (800MHz 
and 900MHz radios only)
45 2605898U01 SHIELD, PA (800MHz and 900MHz radios 
(only)
46 7505334W01 PAD, Sound Dampening
47 7505437W01 KEYPAD, DTMF
48 5102463J08 CIRCUIT BOARD, DTMF
49 7505393N33 PAD, Shock
50 3205827V01 WEDGE, Universal
51 7505922Z01 PAD, Thermal
52 1305633V01 RING, Concentric; Escutcheon
53 3605635V01 Knob, Concentric Ring
54 1405307X07 TAPE, Insulator (trim to size, 0.3” x 0.2”)
Notes: 1. Refer to electrical parts list (miscellaneous)
2. Refer to electrical parts list (transceiver board) 
						

							53
Top-Display 
Radios
ITEM
NO.MOTOROLA
PA R T  N O .DESCRIPTION
1 4505896U01 LEVER, PTT
2 3205902U01 SEAL, PTT, and ACTUATOR for S404, S405, 
S406, and S408
3 1505627V04 COVER, Front
4 - - - - - - - - - LABEL, Agency Approval; not field replace-
able
5 3305183R55 LABEL, Motorola
6 3305183R70
or 3305183R71
or 3305183R94LABEL, MT 2000
LABEL, MTS 2000
LABEL, MTX
7 3505535X02 FELT, Speaker
8 See Note 1 SPEAKER (LS401)
9 0705470V01 BRACKET, Speaker Retainer
10 See Note 1 MICROPHONE (MK401)
11 1405330W02 BOOT, Microphone
12 8405641V02 FLEX, Front Cover/Display
13 8405333W03 FLEX, Controls
14 3905517V01 POPPLE, PTT (p/o S406)
15 3605253V01 KNOB, On/Off/Volume
16 3605636V01 KNOB, Frequency
17 1305698V01 ESCUTCHEON, Control Top
18 3205160W01 SEAL, Actuator; for S101
19 2205159W01 PIN, Actuator; for S101
20 3205514W01 SEAL, Accessory Connector
21 3205177Z01 SEAL, Control Top
22 3205178Z01 SEAL, Emergency Button
23 2705877U01 HOUSING, Switch
24 See Note 1 SWITCH, Toggle (S402)
25 See Note 1 POTENTIOMETER/SWITCH, On/Off/Volume 
Control (R401/S403)
26 3905329W01 POPPLE, Emergency Button
27 See Note 1 LED (CR400A/CR400B)
28 See Note 1 SWITCH, Frequency (S401)29 1505632V01 COVER, Switch Housing
30 - - - - - - - - - SPRING, PA; not field replaceable, order front 
shield (item 37)
31 4205507X01 STRAIN RELIEF
32 See Note 1 CONNECTOR, Strip (P301/P704)
33 See Note 2 PLUG, Connector (P404)
34 3205820V02 SEAL, Connector Plug
35 - - - - - - - - - LABEL, Rear; Information; not field 
replaceable 
36 3205176Z01 O-RING, Contoured/SEAL, Antenna
37 2605891U03
or 2685351C01SHIELD, Front (earlier radios)
SHIELD, Front (latest radios; requires CLIPs, 
Locking: 4285351C01 [Numbered 1, 1 req’d] 
and 4285351C02 [Numbered 2, 2 req’d])
38 See Note 1 SWITCH, RF (S101)
39 - - - - - - - - - LABEL, Barcode; not field replaceable
40 4105266V01 SPRING, RF Switch; part of item 39
41 4405524V01 PISTON, RF Switch; part of item 39
42 1405307X01 INSULATOR
43 1505892U06 CHASSIS (Rear Cover)
44 3905838V01 CONTACT, Antenna Shield Ground (800MHz 
and 900MHz radios only)
45 2605898U01 SHIELD, PA (800MHz and 900MHz radios 
only)
46 7505334W01 PAD, Sound Dampening
47  Not Used
48  Not Used
497505393N33PAD, Shock
50 1305633V01 RING. Concentric; Escutcheon
51 3605635V01 KNOB, Concentric Ring
52 5105238U82 LCD, Top Display
53 7505922Z01 PAD, Thermal
Notes: 1. Refer to electrical parts list (miscellaneous)
          2. Refer to electrical parts list (transceiver board) 
						

							54
Keypad Radios
ITEM
NO.MOTOROLA 
PA R T  N O .DESCRIPTION
1 4505896U01 LEVER, PTT
2 3205902U01 SEAL, PTT, and ACTUATOR for S404, 
S405, S406, and S408
3A
3B1505637V04
1505637V05COVER, Front; Full Keypad
COVER, Front; Limited Keypad
4 - - - - - - - - - LABEL, Agency Approval; not field 
replaceable
5A 7505870U01 KEYPAD, 15-key
5B 7505870U02 KEYPAD, 6-key
6 5105238U83 MODULE, Display
7 3305183R55 LABEL, Motorola
8 3305183R70 LABEL, MT2000
or 3305183R71 LABEL, MTS2000
or 3305183R94 LABEL, MTX
or 3305409X06 LABEL, JT 1000
9 3505535X02 FELT, Speaker
10 See Note 1 SPEAKER (LS401)
11 0705470V01 BRACKET, Speaker Retainer
12 See Note 1 MICROPHONE (MK401)
13 1405330W02 BOOT, Microphone
14 8405310W04 FLEX, Front Cover/Display
15 8405333W03 FLEX, Controls
16 3905517V01 POPPLE, PTT (p/o S406)
17 3605253V01 KNOB, On/Off/Volume
18 3605636V01 KNOB, Frequency
19 1305633V01 RING, Concentric; Escutcheon
20 3605635V01 KNOB, Concentric Ring
21 1305698V01 ESCUTCHEON, Control Top
22 3205160W01 SEAL, Actuator; for S101
23 2205159W01 PIN, Actuator; for S101
24 3205514W01 SEAL, Accessory Connector
25 3205177Z01 SEAL, Control Top
26 3205178Z01 SEAL, Emergency Button27 2705877U01 HOUSING, Switch
28 See Note 1 SWITCH, Toggle (S402)
29 See Note 1 POTENTIOMETER/SWITCH, On/Off/
Volume Control (R401/S403)
30 3905329W01 POPPLE, Emergency Button
31 See Note 1 LED (CR400A/CR400B)
32 See Note 1 SWITCH, Frequency (S401)
33 1505632V01 COVER, Switch Housing
34 - - - - - - - - - SPRING, PA; not field replaceable, order 
front shield (item 41)
35 4205507X01 STRAIN RELIEF
36 See Note 1 CONNECTOR, Strip (P301/P704)
37 See Note 2 PLUG, Connector (P404)
38 3205820V02 SEAL, Connector Plug
39 - - - - - - - - - LABEL, Rear; Information; not field 
replaceable 
40 3205176Z01 O-RING, Contoured/SEAL, Antenna
41 2605891U03
or 2685351C01SHIELD, Front (earlier radios)
SHIELD, Front (latest radios; requires 
CLIPs, Locking: 4285351C01 
[Numbered 1, 1 req’d] and 4285351C02 
[Numbered 2, 2 req’d])
42 See Note 1 SWITCH, RF (S101)
43 - - - - - - - - - LABEL, Barcode; not field replaceable
44 4105266V01 SPRING, RF Switch
45 4405524V01 PISTON, RF Switch
46 1405307X01 INSULATOR
47 1505892U06 CHASSIS (Rear Cover)
48 3905838V01 CONTACT, Antenna Shield Ground 
(800MHz and 900MHz radios only)
49 2605898U01 SHIELD, PA (800MHz and 900MHz radios 
only)
50 7505393N33 PAD, Shock
51 7505922Z01 PAD, Thermal
Notes: 1. Refer to electrical parts list (miscellaneous)
          2. Refer to electrical parts list (transceiver board) 
						

							55
Uni-board Radios
ITEM
NO.MOTOROLA
PA R T  N O .DESCRIPTION
1 4505896U01 LEVER, PTT
2 3205902U01 SEAL, PTT, and ACTUATOR for S404, S405, 
S406, and S408
3 1505627V05 COVER, Front
4 - - - - - - - - - - LABEL, Agency Approval; not field 
replaceable
5 3305183R55 LABEL, Motorola
6 3305252X18 LABEL, MTXLS
7 3505535X02 FELT, Speaker
8 See Note 1 SPEAKER (LS401)
9 0705470V01 BRACKET, Speaker Retainer
10 See Note 1 MICROPHONE (MK401)
11 1405330W01 BOOT, Microphone
12 8405310W04 FLEX, Front Cover/Display
13 8405333W03 FLEX, Controls
14 3905517V01 POPPLE, PTT (p/o S406)
15 3605253V01 KNOB, On/Off/Volume
16  3605254V01 KNOB, Frequency; 16-Frequency
17  1305872U01 ESCUTCHEON, Control Top; 16-Freq. 
18 3205160W01 SEAL, Actuator; for S101
19 2205159W01 PIN, Actuator; for S101
20 3205514W01 SEAL, Accessory Connector
21 3205177Z01 SEAL, Control Top 
22 3205178Z01 SEAL, Emergency Button
23 2705877U01 HOUSING, Switch
24 See Note 1 SWITCH, Toggle (S402)25 See Note 1 POTENTIOMETER/SWITCH, On/Off/
Volume Control (R401/S403)
26 3905329W01 POPPLE, Emergency Button
27 See Note 1 LED (CR400A/CR400B)
28 See Note 1 SWITCH, Frequency (S401)
29 1505632V01 COVER, Switch Housing
30 1405307X01 INSULATOR
31 - - - - - - - - - - SPRING, PA; not field replaceable, order 
front shield (item 37)
32 See Note 2 PLUG, Connector (P404)
33 3205820V02 SEAL, Connector Plug
34 - - - - - - - - - - LABEL, Rear; Information; not field
replaceable 
35 - - - - - - - - - - LABEL, Barcode; not field replaceable
36 3205176Z01 O-RING, Contoured/SEAL, Antenna
37 2605891U03
or 2685351C01SHIELD, Front (earlier radios)
SHIELD, Front (latest radios; requires CLIPs, 
Locking: 4285351C01 [Numbered 1, 1 req’d] 
and 4285351C02 [Numbered 2, 2 req’d])
38 1505892U06 CHASSIS (Rear Cover)
39 3905838V01 CONTACT, Antenna Shield Ground 
40 2605898U01 SHIELD, PA 
41 7505334W01 PAD, Sound Dampening
42 7505393N33 PAD, Shock
43 3205827V01 WEDGE, Universal
44 7505922Z01 PAD, Thermal
Notes: 1. Refer to electrical parts list (miscellaneous)
2. Refer to electrical parts list (transceiver board) 
						

							56
Notes 
						

							57
Component Location 
Diagrams, Parts Lists, and 
Schematic Diagrams
9
Introduction
GeneralTransceiver components and controller components reside on 
separate circuit boards. Refer to the model charts located in the front 
of this manual (prior to Section 1) to determine the controller board 
and transceiver board unique to your model radio. Then locate the 
appropriate transceiver board and controller board component 
location diagram, schematic diagram, and parts list located in this 
section of the manual.
Component location diagrams of the controls flex, two front cover/
display flexes, and the strip connector are also located in this section. 
A miscellaneous parts list accompanies the flex circuits.
Almost all circuit boards in this family of radios are either six or eight 
layers. Layer 1 is the outer most layer viewed from side 1, and layer 6 
or 8 (as applicable) is the outer most layer viewed from sine 2. A typical 
8-layer circuit board detail, viewing copper steps in proper layer 
sequence, is illustrated in Figure 18. 
Tr a n s c e i v e r  Frequently, transceivers that use a common transceiver board will be 
combined into one component location diagram, one schematic 
diagram, and one parts list. The differences between transceivers will 
be noted throughout the applicable parts list. 
ControllerFrequently, controllers that use a common controller board will be 
combined into one component location diagram, one schematic 
diagram, and one parts list. The differences between controllers will be 
noted throughout the applicable parts list.
Schematic and Circuit 
Board NotesMost all of the schematic diagrams in this manual include specific 
notes. Typically the notes are colored red to make them stand-out 
LAYER 1 (L1)
LAYER 2 (L2)
LAYER 3 (L3)
LAYER 4 (L4)
INNER LAYER
SLAYER 5 (L5)
LAYER 6 (L6)
MAEPF-18828-A
SIDE 1
SIDE 2LAYER 7 (L7)
LAYER 8 (L8)
Figure 18.   Circuit Board Layers 
						

							58from the overall schematic. The following two notes are general and 
apply to all schematic and circuit board applications.
1. Unless otherwise stated, resistor values are in ohms (k = 1000), 
capacitor values are in picofarads (pF) or microfarads (µF), and 
inductor values are in microhenrys (µH) or nanohenrys (nH).
2. DC voltages are measured from point indicated to chassis ground 
using a high impedance (10 megohm) Motorola DC voltmeter or 
equivalent. Transmitter measurements should be made with a 
1.2uF choke in series with the voltage probe to prevent circuit 
loading.
Reference Designator 
AssignmentReference designators are assigned in the following manner:
Units Series  = Receiver
100 SERIES = Transmitter
200 SERIES = Frequency Generation
300 SERIES = Miscellaneous
400 SERIES = Housing/Escutcheon
500 SERIES = Display 
600 SERIES =  Hear Clear Option
700 SERIES = Controller
Interconnect Tie Point 
Legend5V REG = Regulated Five Volts
B+ = Battery Voltage (7.5V)
R5 = Receiver Five Volts
T5 = Transmitter Five Volts
CLK = Clock
D=Data
DAC = Digital To Analog Converter
DAC RST = DAC Reset
LCK = Lock
NC = No Connection
SYN = Synthesizer
VR = Voltage Regulator
Integrated Circuit Details 
with Pin-Out NamesBecause of today’s technology, integrated circuits and special modules 
are able to perform a vast amount of functions in a single component. 
The components are getting smaller and the number of IO pins is 
getting greater, to the point that there is not enough room to put 
enough IC information on the schematics and circuit boards. To help 
troubleshoot and signal trace this family of radios, several of the IC’s 
are detailed with pin-out names and illustrated on the next few pages.
Remember that PBGA components in a radio can be a combination of 
OMPAC and/or Glob Top. Although the illustrations on the next few 
pages reflect OMPAC devices, like Good-by components are 
electrically the same.