Motorola Two Way Portable Radio Ht750 Ht1250 Mtx850 Mtx1250 Mtx8250 Mtx9250 Supplement Basic 68p81093c57 B Manual

							 
1-1 
Chapter 1
Introduction 
1.1 Scope of Manual 
This manual is intended for use by service technicians familiar with similar types of equipment. It 
contains service information required for the equipment described and is current as of the printing 
date. Changes which occur after the printing date may be incorporated by a complete Manual revision 
or alternatively as additions. 
1.2 Warranty and Service Support 
Motorola offers support which includes: full exchange and/or repair of the product during the warranty 
period; and service/repair or spare parts support out of warranty. Any Òreturn for exchangeÓ or Òreturn 
for repairÓ to an authorized Motorola Dealer must be accompanied by a Warranty Claim Form. 
Warranty Claim Forms are obtained by contacting an Authorized Motorola Dealer. (See section 1.2.4 
on page 1-3.) 
1.2.1 Warranty Period and Return Instructions 
The terms and conditions of warranty are deÞned fully in the Motorola Dealer or Distributor or Reseller 
contract. These conditions may change from time to time, and the following subsections are for 
guidance purposes only.
In instances where the product is covered under a Òreturn for replacementÓ or Òreturn for repairÓ 
warranty, a check of the product should be performed prior to shipping the unit back to Motorola. This 
is to ensure that the product has been correctly programmed or has not been subjected to damage 
outside the terms of the warranty.
Prior to shipping any radio back to the appropriate Motorola warranty depot, please contact Customer 
Resources (Please see page 2 and page 3 in this chapter.). All returns must be accompanied by a 
Warranty Claim Form, available from your Customer Resources representative.  
Products should be 
shipped back in the original packaging 
, or correctly packaged to ensure that no damage occurs in 
transit.  
1.2.2 After Warranty  Period 
After the Warranty period, Motorola continues to support its products in two ways: 
1. Motorolas Radio Parts and Service Group offers repair service to users and dealers at competi-
tive prices. 
2. AAD supplies individual parts and modules that can be purchased by Dealers who are capable of 
performing fault analysis and repair. 
NOTE 
Before operating or testing these units, please read the Safety Information Section in the 
front of this manual. 
						

							 
1-2Introduction 
1.2.3 Piece Parts Availability 
Some replacement parts, spare parts, and/or product information can be ordered directly. If a 
complete Motorola part number is assigned to the part, and it is not identiÞed as Depot ONLY, it is 
available from the Accessories and Aftermarket Division (AAD). If no part number is assigned, the 
part is not normally available from Motorola. If the part number is appended with an asterisk, the part 
is serviceable by a Motorola Depot only. If a parts list is not included, this generally means that no 
user-serviceable parts are available for that kit or assembly. 
Parts Order Entry 
7:00 A.M. to 7:00 P.M. (Central Standard Time)
Monday through Friday (Chicago, U.S.A.) 
To Order Parts: 
1-800-422-4210, or 847-538-8023 (Voice)
1-847-538-8198 (Fax)
After hours or weekends:
1-800-925-4357 
Motorola Parts 
Accessories and Aftermarket Division 
(United States and Canada)
Attention: Order Processing
1313 E. Algonquin Road
Schaumburg, IL 60196 
Parts IdentiÞcation 
1-847-538-0021 or 1-800-422-4210 (Voice)
1-847-538-8194 (Fax) 
						

							 
Introduction1-3 
1.2.4 Technical Support 
Technical support is available to assist the dealer/distributor in resolving any malfunction which may 
be encountered. Initial contact should be by telephone to Customer Resources wherever possible. 
When contacting Motorola Technical Support, be prepared to provide the product  
model number 
  
and the unitÕs  
serial number 
.
For service you can contact the following Depot. Please call and conÞrm your return prior to sending 
the unit to the depot for service. 
Motorola Toronto Service Centre 
3900 Victoria Park Avenue
North York, Ontario, Canada M2H 3H7
1-800-543-3222
1-416-756-5841
1-888-331-9872 (Fax) 
						

							 
1-4Introduction 
1.3 Radio Model Information 
The model number and serial number are located on a label attached to the back of your radio. You 
can determine the RF output power, frequency band, protocols, and physical packages. The example 
below shows one portable radio model number and its speciÞc characteristics. 
Table 1-1: Radio Model Number (Example: AAH25RDC9GB3) 
Type 
of Unit
Model 
SeriesFreq. 
BandPower 
LevelPhysical 
PackagesChannel 
SpacingProtocolFeature 
LevelModel
RevisionModel 
Package
AA 
or
LAH25 R 
UHF1
(403-470 
MHz)
 
D 
4-5W 
C 
HT750¥LS
MTX450
MTX150
MTX850
MTX950 
9 
Program-
mable 
DU 
LT R 
3 
HT750¥LS
MTX450
MTX150
MTX850
MTX950 
AN
K 
(136 -174 
MHz) 
H
MTX4500
MTX1500
MTX8250
MTX9250GB
Privacy 
Plus6
MTX4500
MTX1500
MTX8250
MTX9250
GE
Privacy 
Plus
w/Roaming
AA or LA = Motorola Internal Use
H = Portable 
						

							2-1
Chapter 2
Intrinsically Safe Radio Information
2.1 FMRC Approved Equipment
Anyone intending to use a radio in a location where hazardous concentrations of ßammable material 
exist (hazardous atmosphere) is advised to become familiar with the subject of intrinsic safety and 
with the National Electric Code NFPA 70 (National Fire Protection Association) Article 500 (hazardous 
[classiÞed] locations).
An Approval Guide, issued by Factory Mutual Research Corporation (FMRC), lists manufacturers and 
the products approved by FMRC for use in such locations. FMRC has also issued a voluntary 
approval standard for repair service (ÒClass Number 3605Ó).
FMRC Approval labels are attached to the radio to identify the unit as being FM Approved for 
speciÞed hazardous atmospheres. This label speciÞes the hazardous Class/Division/Group along 
with the part number of the battery that must be used. Depending on the design of the portable unit, 
this FM label can be found on the back of the radio housing or the bottom of the radio housing. Their 
Approval mark is shown below.
Radios must ship from the Motorola manufacturing facility with the hazardous atmosphere capability 
and FM Approval labeling. Radios will not be ÒupgradedÓ to this capability and labeled in the 
Þeld.
A modiÞcation changes the unitÕs hardware from its original design conÞguration. ModiÞcations can 
only be done by the original product manufacturer at one of its FMRC audited manufacturing 
facilities.
WARNING: Do not operate radio communications equipment in a hazardous atmosphere 
unless it is a type especially qualiÞed (e.g. FMRC Approved) for such use. An explosion or 
Þre may result.
WARNING: Do not operate the FMRC Approved Product in a hazardous atmosphere if it has 
been physically damaged (e.g. cracked housing). An explosion or Þre may result.
WARNING: Do not replace or charge batteries in a hazardous atmosphere. Contact sparking 
may occur while installing or removing batteries and cause an explosion or Þre.
WARNING: Do not replace or change accessories in a hazardous atmosphere. Contact 
sparking may occur while installing or removing accessories and cause an explosion or Þre.
WARNING: Do not operate the FMRC Approved Product unit in a hazardous location with the 
accessory contacts exposed. Keep the connector cover in place when accessories are not 
used.
WARNING: Turn radio off before removing or installing a battery or accessory.
WARNING: Do not disassemble the FMRC Approved Product unit in any way that exposes 
the internal electrical circuits of the unit.
FM
APPROVED
! 
						

							2-2Intrinsically Safe Radio Information
Unauthorized or incorrect modiÞcation of an FMRC Approved Product unit will negate the Approval 
rating of the product.
2.2 Repair of FMRC Approved Products
REPAIRS FOR MOTOROLA FMRC APPROVED PRODUCTS ARE THE RESPONSIBILITY OF THE 
USER.
You should not repair or relabel any Motorola manufactured communication equipment bearing the 
FMRC Approval label (ÒFMRC Approved ProductÓ) unless you are familiar with the current FMRC 
Approval standard for repairs and service (ÒClass Number 3605Ó).
You may want to consider using a repair facility that operates under 3605 repair service approval.
FMRCÕs Approval Standard Class Number 3605 is subject to change at any time without notice to 
you, so you may want to obtain a current copy of 3605 from FMRC. Per the December, 1994 
publication of 3605, some key deÞnitions and service requirements are as follows:
2.2.1 Repair
A repair constitutes something done internally to the unit that would bring it back to its original 
condition Approved by FMRC. A repair should be done in an FMRC Approved facility.
Items not considered as repairs are those in which an action is performed on a unit which does not 
require the outer casing of the unit to be opened in a manner which exposes the internal electrical 
circuits of the unit. You do not have to be an FMRC Approved Repair Facility to perform these actions.
2.2.2 Relabeling
The repair facility shall have a method by which the replacement of FMRC Approval labels are 
controlled to ensure that any relabeling is limited to units that were originally shipped from the 
Manufacturer with an FM Approval label in place. FMRC Approval labels shall not be stocked by the 
repair facility. An FMRC Approval label shall be ordered from the original manufacturer as needed to 
repair a speciÞc unit. Replacement labels may be obtained and applied by the repair facility providing 
satisfactory evidence that the unit being relabeled was originally an FMRC Approved unit. VeriÞcation 
may include, but is not limited to: a unit with a damaged Approval label, a unit with a defective housing 
displaying an Approval label, or a customer invoice indicating the serial number of the unit and 
purchase of an FMRC Approved model.
2.2.3 Do Not Substitute Options or Accessories
The Motorola communications equipment certiÞed by Factory Mutual is tested as a system and 
consists of the FM Approved portable, FM Approved battery, and FM Approved accessories or 
options, or both. This Approved portable and battery combination must be strictly observed. There 
must be no substitution of items, even if the substitute has been previously Approved with a different 
Motorola communications equipment unit. Approved conÞgurations are listed in the FM Approval 
guide published by FMRC, or in the product FM Supplement. This FM Supplement is shipped with FM 
WARNING: Failure to use an FMRC Approved Product unit with an FMRC Approved battery 
or FMRC Approved accessories speciÞcally approved for that product may result in the dan-
gerously unsafe condition of an unapproved radio combination being used in a hazardous 
location.
WARNING: Incorrect repair or relabeling of any FMRC Approved Product unit could 
adversely affect the Approval rating of the unit.
WARNING: Use of a radio that is not intrinsically safe in a hazardous atmosphere could 
result in serious injury or death.
!
! 
						

							Intrinsically Safe Radio Information2-3
Approved radio and battery combination from the manufacturer. The Approval guide, or the Approval 
standard Class Number 3605 document for repairs and service, can be ordered directly through 
Factory Mutual Research Corporation located in Norwood, Massachusetts. 
						

							 
HT750¥LS Radio Exploded Mechanical View and Parts List
 
3
 
-1
 
3.1  HT750¥LS Radio Exploded Mechanical View and Parts List
8
9
10
11
12
13
14
15
16
18
19
20
21
22
24
23
25
26
27
28
29
30
31
33
34
35
756
2
3
41
32
17
ItemMotorola 
Part NumberDescription1
See Accesso-
ries Chapter
Antenna
2 3680529Z01 Knob, Volume
3
3680530Z01
Knob, Channel Selector
4 1380525Z01 Escutcheon, Top
5
3380644Z01
Escutcheon, Label
6 3280533Z01 Seal, Control Top
7
6180527Z01
Litepipe, Tx
8 HHLN4059
HHLN4071Nameplate, HT750¥LS
Nameplate, HT750¥LS DTMF 
9
1586059A01
Dust Cover, Universal Connector
10 1386058A01 Escutcheon, Universal Flex
11
1580666Z03
1580666Z04
Front Cover, Basic
Front Cover with Keypad (DTMF)
12 Not Field 
ReplaceableEscutcheon, FM13
7580532Z01
Keypad, Side Control
14 1380528Z01 Bezel, Side Control
15
7580620Z03
7580620Z04
Keypad, Blank 
Keypad, Full 
16 0104007J99 Keypad Board Assembly
17
4280498Z01
Retainer, Keypad PCB
18 3586057A01 Felt Speaker
19
1480577C01
Boot, Microphone
20 5085962A02 Speaker
21
5013920A04
Microphone
22 8480549Z01 Flex Speaker-Microphone
23
2113740A41
Capacitor, 33pF
ItemMotorola 
Part NumberDescription
24 4280504Z01 Retainer, Speaker25
0304726J04
Screw
26 See section 8.1 Ctrl/RF Board Assembly
27
8480475Z02
Flex, Keypad/Controller
28 1480652Z01 Insulator, Antenna
29
7580556Z01
Pad, Thermal
30 3280534Z01 Seal, Contact
31
3280536Z01
Gasket, O-Ring
32 3980698Z01 Contact, Ground, Compliant, UHF
33
2780518Z01
Chassis
34 See Accesso-
ries ChapterBattery
35
HLN9714
Beltclip
ItemMotorola 
Part NumberDescription 
						

							 
3
 
-2MTX450 Radio Exploded Mechanical View and Parts List
 
3.2 MTX450 Radio Exploded Mechanical View and Parts List
8
9
10
11
12
13
14
15
16
18
19
20
21
22
24
23
25
26
27
28
29
30
31
33
34
35
756
2
3
41
32
17ItemMotorola 
Part NumberDescription1
See Accesso-
ries Chapter
Antenna
2 3680529Z01 Knob, Volume
3
3680530Z01
Knob, Channel Selector
4 1380525Z01 Escutcheon, Top
5
3380644Z01
Escutcheon, Label
6 3280533Z01 Seal, Control Top
7
6180527Z01
Litepipe, Tx
8 HHLN4212 Nameplate, MTX450
9
1586059A01
Dust Cover, Universal Connector
10 1386058A01 Escutcheon, Universal Flex
11
1580666Z03
1580666Z04
Front Cover, Basic
Front Cover with Keypad (DTMF)
12 Not Field 
ReplaceableEscutcheon, FM13
7580532Z01
Keypad, Side Control
14 1380528Z01 Bezel, Side Control
15
7580620Z03
7580620Z04
Keypad, Blank 
Keypad, Full
16 0104007J99 Keypad Board Assembly
17
4280498Z01
Retainer, Keypad PCB
18 3586057A01 Felt Speaker
19
1480577C01
Boot, Microphone
20 5085962A02 Speaker
21
5013920A04
Microphone
22 8480549Z01 Flex Speaker-Microphone
23
2113740A41
Capacitor, 33pF
ItemMotorola 
Part NumberDescription
24 4280504Z01 Retainer, Speaker25
0304726J04
Screw
26 See section 8.1 Ctrl/RF Board Assembly
27
8480475Z02
Flex, Keypad/Controller
28 1480652Z01 Insulator, Antenna
29
7580556Z01
Pad, Thermal
30 3280534Z01 Seal, Contact
31
3280536Z01
Gasket, O-Ring
32 3980698Z01 Contact, Ground, Compliant, UHF
33
2780518Z01
Chassis
34 See Accesso-
ries ChapterBattery
35
HLN9714
Beltclip
ItemMotorola 
Part NumberDescription