Motorola GP88s User manual

November, 2003
GP88s
Portable Radio
Service Manual
6804111J47-D

Computer Software Copyrights
The Motorola products described in this manual may include copyrighted Motorola computer programs stored
in semiconductor memories or other media. Laws in the United States and other countries preserve for
Motorola certain exclusive rights for copyrighted computer programs, including the exclusive right to copy or
reproduce in any form, the copyrighted computer program. Accordingly, any copyrighted Motorola computer
programs contained in the Motorola products described in this manual may not be copied or reproduced in
any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola prod-
ucts shall not be deemed to grant, either directly or by implication, estoppel or otherwise, any license under
the copyrights, patents or patent applications of Motorola, except for the normal non-exclusive royalty-free
license to use that arises by operation of law in the sale of a product.

Document History iii
Document History
The following major changes have been implemented in this manual since the previous edition:
Edition Description Date
6804111J47-D Updated the mechanical parts list and exploded view. Nov. 2003

iv Document History
THIS PAGE INTENTIONALLY LEFT BLANK

Safety Information v
SAFETY INFORMATION
Product Safety and RF Exposure for Portable Two-Way Radios
The information provided in this document supersedes the general safety information contained in user guides
published prior to February 2002.
For radios that have been approved as intrinsically safe, read the instructions and information on intrinsic safety.
Compliance with RF Energy Exposure Standards
NOTICE: This radio is intended for use in occupational/controlled applications where users
have been made aware of the potential for exposure and can exercise control over
their exposure. This radio device is NOT authorized for general population,
consumer or similar use.
Federal Communication Commission(FCC) Regulations
The FCC has established limits for safe exposure to radio frequency (RF) emissions from portable two-way
radios. The FCC requires manufacturers to demonstrate compliance with RF exposure limits before portable two-
way radios can be marketed in the U.S. When two-way radios are approved for occupational/controlled
environment exposure limits, the FCC requires users to be fully aware of, and exercise control over, their
exposure. Awareness and control of RF exposure can be accomplished by the use of labels, or by education or
training through appropriate means, such as information and instructions in user manuals or safety booklets.
Your Motorola two-way radio has an RF exposure information label in the battery compartment. This user safety
booklet includes useful information about RF exposure and helpful instructions on how to control your RF
exposure.
Your Motorola two-way radio is designed and tested to comply with a number of national and international
standards and guidelines (listed below) regarding human exposure to radio frequency electromagnetic energy.
This radio complies with the IEEE (FCC) and ICNIRP exposure limits for occupational/controlled RF
exposure environments at usage factors of up to 50% talk–50% listen. In terms of measuring RF energy for
compliance with FCC exposure guidelines, your radio radiates measurable RF energy only while it is
transmitting (during talking), not when it is receiving (listening) or in standby mode.
NOTE: The approved batteries, supplied with the portable radio, are rated for a 5-5-90 duty cycle
(5% talk–5% listen–90% standby), even though this radio complies with FCC occupational
exposure limits at usage factors of up to 50% talk.
Your Motorola two-way radio complies with the following RF energy exposure standards and guidelines:
•United States Federal Communications Commission, Code of Federal Regulations; 47 CFR part
2 sub-part J
•American National Standards Institute (ANSI) / Institute of Electrical and Electronic Engineers
(IEEE) C95. 1-1992
• Institute of Electrical and Electronic Engineers (IEEE) C95.1-1999 Edition
• International Commission on Non-Ionizing Radiation Protection (ICNIRP) 1998
BEFORE USING THIS RADIO, READ THIS BOOKLET WHICH CONTAINS IMPORTANT OPERAT-
ING INSTRUCTIONS FOR SAFE USAGE AND RF ENERGY AWARENESS AND CONTROL INFOR-
MATION FOR COMPLIANCE WITH RF ENERGY EXPOSURE LIMITS IN APPLICABLE NATIONAL
AND INTERNATIONAL STANDARDS.

vi Safety Information
•Ministry of Health (Canada) Safety Code 6. Limits of Human Exposure to Radiofrequency Elec-
tromagnetic Fields in the Frequency Range from 3 kHz to 300 GHz, 1999
•Australian Communications Authority Radiocommunications (Electromagnetic Radiation -
Human Exposure) Standard, 2001
• ANATEL, Brasil Regulatory Authority, Resolution 256 (April 11, 2001) “additional requirements
for SMR, cellular and PCS product certification.”
Compliance and Control Guidelines and Operating Instructions for
Portable Two-Way Radios
To control your exposure and ensure compliance with the occupational/ controlled environment exposure limits,
always adhere to the following procedures:
•Transmit no more than 50% of the time. To transmit (talk), push the Push-To-Talk (PTT) button. To
receive calls, release the PTT button. Transmitting 50% of the time or less is important since the
radio generates measurable RF energy exposure only when transmitting (in terms of measuring
standards compliance).
• Hold the radio in a vertical position in front of the face with the microphone
(and other parts of the radio including the antenna) at least one to two inches
(2.5 to 5 centimeters) away from the lips. Keeping the radio at a proper dis-
tance is important since RF exposures decrease with distance from the
antenna.
•For body-worn operation, always place the radio in a Motorola-approved clip, holder, holster,
case, or body harness for this product. Using non–Motorola-approved accessories may result in
exposure levels which exceed the FCC’s occupational/controlled environment RF exposure lim-
its.
• If you are not using a body-worn accessory and are not using the radio in the intended use posi-
tion in front of the face, ensure the antenna and the radio are kept one inch (2.5 centimeters)
from the body when transmitting. Keeping the radio at a proper distance is important since RF
exposures decrease with distance from the antenna.
• Use only Motorola-approved supplied or replacement antennas, batteries, and accesso-
ries. Use of non–Motorola-approved antennas, batteries and accessories may exceed FCC RF
exposure guidelines. For a list of Motorola-approved antennas,batteries, and other acces-
sories, visit the following web site which lists approved accessories:
http://ap.cgiss.motorola.com/AAD/index.html
For additional information on exposure requirements or other training information,
visit http://www.motorola.com/rfhealth.
Electromagnetic Interference/Compatibility
NOTE: Nearly every electronic device is susceptible to electromagnetic interference (EMI) if
inadequately shielded, designed, or otherwise configured for electromagnetic compatibility.
Facilities
To avoid electromagnetic interference and/or compatibility conflicts, turn off your radio in any facility where posted
notices instruct you to do so. Hospitals or health care facilities may be using equipment that is sensitive to
external RF energy.
Aircraft
When instructed to do so, turn off your radio when on board an aircraft. Any use of a radio must be in accordance
with applicable regulations per airline crew instructions.

Safety Information vii
Medical Devices
Pacemakers
The Advanced Medical Technology Association (AdvaMed) recommends that a minimum separation of 6 inches
(15 centimeters) be maintained between a handheld wireless radio and a pacemaker. These recommendations
are consistent with those of the U.S. Food and Drug Administration.
Persons with pacemakers should:
•ALWAYS keep the radio more than 6 inches (15 centimeters) from their pacemaker when the
radio is turned ON.
• not carry the radio in the breast pocket.
• use the ear opposite the pacemaker to minimize the potential for interference.
• turn the radio OFF immediately if you have any reason to suspect that interference is taking
place.
Hearing Aids
Some digital wireless radios may interfere with some hearing aids. In the event of such interference, you may
want to consult your hearing aid manufacturer to discuss alternatives.
Other Medical Devices
If you use any other personal medical device, consult the manufacturer of your device to determine if it is
adequately shielded from RF energy. Your physician may be able to assist you in obtaining this information.
Driver Safety
Check the laws and regulations on the use of radios in the area where you drive. Always obey them.
When using your radio while driving, please:
• Give full attention to driving and to the road.
• Use hands-free operation, if available.
• Pull off the road and park before making or answering a call if driving conditions so require.

viii Safety Information
Operational Warnings
Operational Cautions
Intrinsically Safe Radio Information
FMRC Approved Equipment
Anyone intending to use a radio in a location where hazardous concentrations of flammable materials 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 [classified] 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 (“Class Number 3605”).
FMRC Approval labels are attached to the radio to identify the unit as being FMRC Approved for
specified hazardous atmospheres. This label specifies 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 or the bottom of the radio housing. The FM Approval
Mark is shown here.
For Vehicles With An Air Bag
Do not place a portable radio in the area over an air bag or in the air bag deployment area.
Air bags inflate with great force. If a portable radio is placed in the air bag deployment area
and the air bag inflates, the radio may be propelled with great force and cause serious injury
to occupants of the vehicle.
Potentially Explosive Atmospheres
Turn off your radio prior to entering any area with a potentially explosive atmosphere, unless
it is a portable radio type especially qualified for use in such areas as “Intrinsically Safe” (for
example, Factory Mutual, CSA, UL, or CENELEC). Do not remove, install, or charge batteries
in such areas. Sparks in a potentially explosive atmosphere can cause an explosion or fire
resulting in bodily injury or even death.
The areas with potentially explosive atmospheres referred to above include fueling areas
such as below decks on boats, fuel or chemical transfer or storage facilities, and areas
where the air contains chemicals or particles such as grain, dust or metal powders. Areas
with potentially explosive atmospheres are often, but not always, posted.
Blasting Caps And Blasting Areas
To avoid possible interference with blasting operations, turn off your radio when you are
near electrical blasting caps, in a blasting area, or in areas posted: “Turn off two-way radio.”
Obey all signs and instructions.
Antennas
Do not use any portable radio that has a damaged antenna. If a damaged antenna comes into contact
with your skin, a minor burn can result.
Batteries
All batteries can cause property damage and/or bodily injury such as burns if a conductive material
such as jewelry, keys, or beaded chains touch exposed terminals. The conductive material may
complete an electrical circuit (short circuit) and become quite hot. Exercise care in handling any
charged battery, particularly when placing it inside a pocket, purse, or other container with metal
objects.
FM
APPROVED

Safety Information ix
Radios must ship from the Motorola manufacturing facility with the hazardous atmosphere capability and FM
Approval labeling. Radios will not be “upgraded” to this capability and labeled in the field. A modification changes
the unit’s hardware from its original design configuration. Modifications can only be made by the original product
manufacturer at one of its FMRC-audited manufacturing facilities.
Repair of FMRC Approved Products
REPAIRS FOR MOTOROLA PRODUCTS WITH FMRC APPROVAL ARE THE RESPONSIBILITY OF THE
USER.
You should not repair or relabel any Motorola-manufactured communication equipment bearing the FMRC
Approval label (“FMRC Approved Product”) unless you are familiar with the current FMRC Approval standard for
repairs and service (“Class Number 3605”).
You may want to consider using a repair facility that operates under 3605 repair service approval.
•Do not operate radio communications equipment in a hazardous atmosphere unless it is a
type especially qualified (for example, FM Approved) for such use. An explosion or fire
may result.
• Do not operate an FMRC Approved product in a hazardous atmosphere if it has been
physically damaged (for example, cracked housing). An explosion or fire may result.
• Do not replace or charge batteries in a hazardous atmosphere. Contact sparking may
occur while installing or removing batteries and cause an explosion or fire.
• Do not replace or change accessories in a hazardous atmosphere. Contact sparking may
occur while installing or removing accessories and cause an explosion or fire.
•Turn the radio off before removing or installing a battery or accessory.
• Do not disassemble an FMRC Approved Product in any way that exposes the internal
circuits of the unit.
•Failure to use an FMRC Approved Product with an FMRC Approved battery or FMRC
Approved accessories specifically approved for that product may result in the
dangerously unsafe condition of an unapproved radio combination being used in a
hazardous location.
• Unauthorized or incorrect modification of an FMRC Approved Product will negate the
Approval rating of the product.
• Incorrect repair or relabeling of any FMRC Approved Product could adversely affect the
Approval rating of the unit.
• Use of a radio that is not intrinsically safe in a hazardous atmosphere could result in
serious injury or death.

x Safety Information
The FMRC’s Approval Standard Class Number 3605 is subject to change at any time without notice to you. You
may want to obtain a current copy of 3605 from the FMRC. Per the December 1994 publication of 3605, some
key definitions and service requirements are as follows:
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 repair 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 that exposes the internal electrical circuits of the unit. You do
not have to be an FMRC Approved repair facility to perform these actions.
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 specific unit. Replacement labels may be
obtained and applied by the repair facility, provided there is satisfactory evidence that the unit being relabeled
was originally an FMRC Approved unit. Verification 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.
Do Not Substitute Options or Accessories
The Motorola communications equipment certified 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 FM
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 configurations are listed in the FM Product Listing Manual that was included with your radio.

xi
Table of Contents
Section SAFETY INFORMATION
Section 1 Introduction
1.0 Scope of Manual.................................................................................................. 1-1
2.0 Warranty and Service Support............................................................................. 1-1
2.1 Warranty Period and Return Instructions ....................................................... 1-1
2.2 After Warranty Period..................................................................................... 1-1
2.3 Piece Parts ..................................................................................................... 1-2
2.4 Technical Support .......................................................................................... 1-3
3.0 Radio Model Information...................................................................................... 1-4
Section 2 Accessories
1.0 Antennas.............................................................................................................. 2-1
2.0 Carrying Accessories........................................................................................... 2-1
3.0 Chargers .............................................................................................................. 2-1
4.0 Batteries............................................................................................................... 2-1
5.0 Adaptors .............................................................................................................. 2-1
6.0 Audio Accessories ............................................................................................... 2-2
7.0 Option Boards...................................................................................................... 2-2
8.0 Manuals ............................................................................................................... 2-2
9.0 Retrofit Kit ............................................................................................................ 2-2
10.0 Service Kits.......................................................................................................... 2-2
Section 3 Service Aids
1.0 Recommended Test Tools................................................................................... 3-1
2.0 Service Aids......................................................................................................... 3-2
3.0 Test Equipment.................................................................................................... 3-3
4.0 Programming/Test Cable..................................................................................... 3-4
Section 4 Maintenance
1.0 Introduction .......................................................................................................... 4-1
2.0 Preventive Maintenance ...................................................................................... 4-1
2.1 Inspection ....................................................................................................... 4-1
2.2 Cleaning Procedures...................................................................................... 4-1
3.0 Safe Handling of CMOS and LDMOS Devices.................................................... 4-2
4.0 Repair Procedures and Techniques — General.................................................. 4-3
5.0 Disassembling and Reassembling the Radio — General.................................... 4-4

xii
6.0 Radio Disassembly — Detailed............................................................................4-5
6.1 Front Cover from Chassis Disassembly .........................................................4-5
6.2 Chassis Assembly Disassembly .....................................................................4-7
6.3 Keypad/Option Board Disassembly ................................................................4-8
6.4 Speaker, Microphone, and Wire Disassembly................................................4-9
6.5 PTT Disassembly..........................................................................................4-10
6.6 Control Top Disassembly..............................................................................4-11
7.0 Radio Reassembly — Detailed ..........................................................................4-11
7.1 Control Top Reassembly ..............................................................................4-11
7.2 PTT Reassembly ..........................................................................................4-11
7.3 Speaker Reassembly....................................................................................4-11
7.4 Keypad Option Board, Microphone and Wire Reassembly ..........................4-12
7.5 Chassis Assembly Reassembly....................................................................4-12
7.6 Chassis and Front Cover Reassembly .........................................................4-13
8.0 Option Board Installation....................................................................................4-13
8.1 Configuring the Radio after Option Board Installation ..................................4-15
8.2 Additional Configuration required by the DTMF Option Board .....................4-16
9.0 Mechanical View and Parts List .........................................................................4-17
9.1 GP88s Exploded View and Parts List ...........................................................4-17
Section 5 Transceiver Performance Testing
1.0 Introduction ..........................................................................................................5-1
2.0 Setup....................................................................................................................5-1
3.0 Test Mode ............................................................................................................5-2
3.1 RF Test Mode .................................................................................................5-2
Section 6 Radio Tuning And Programming
1.0 Introduction ..........................................................................................................6-1
2.0 Radio Tuning Setup .............................................................................................6-2
3.0 CPS Programming Setup.....................................................................................6-3
4.0 Cloning Information ..............................................................................................6-3
Section 7 Controller Information
1.0 Overview ..............................................................................................................7-1
2.0 Radio Power Distribution......................................................................................7-1
3.0 Controller Board ...................................................................................................7-2
3.1 General ...........................................................................................................7-2
3.2 Digital Architecture..........................................................................................7-3
3.3 Controller Schematics (403-470MHz for 8480672Z01 & 136-174MHz for
8480675Z01)7-5
Complete Controller Schematic Diagram................................................................7-5

xiii
Controller ASFIC/ON_OFF Schematic Diagram .................................................... 7-6
Controller Micro Processor Schematic Diagram .................................................... 7-7
Controller Memory Schematic Diagram ................................................................. 7-8
Controller Audio Power Amplifier Schematic Diagram ........................................... 7-9
Controller Interface Schematic Diagram .............................................................. 7-10
3.4 Controller Schematics (403-470MHz for 8480672Z04, Z06 & 136-174MHz for
8480675Z03, Z04)7-11
Complete Controller Schematic Diagram ............................................................. 7-11
Controller ASFIC/ON_OFF Schematic Diagram .................................................. 7-12
Controller Micro Processor Schematic Diagram .................................................. 7-13
Controller Memory Schematic Diagram ............................................................... 7-14
Controller Audio Power Amplifier Schematic Diagram ......................................... 7-15
Controller Interface Schematic Diagram .............................................................. 7-16
Section 8 Keypad Board Information
1.0 Theory of Operation............................................................................................. 8-1
2.0 Troubleshooting Chart ......................................................................................... 8-1
3.0 Parts List (Keypad) .............................................................................................. 8-2
4.0 Keypad Board And Schematic Diagram .............................................................. 8-3
Keypad Board Top and Bottom View (PCB No. 8485642Z01)............................... 8-3
Keypad Board Schematic Diagram ........................................................................ 8-4
Section 9A Model Chart and Test Specifications (403-470 MHz)
1.0 Model Chart .......................................................................................................9A-1
2.0 Specifications.....................................................................................................9A-2
3.0 Transmitter.........................................................................................................9A-3
3.1 General.........................................................................................................9A-3
4.0 Receiver.............................................................................................................9A-5
4.1 Receiver Front-End ......................................................................................9A-5
4.2 Receiver Back-End.......................................................................................9A-6
4.3 Automatic Gain Control Circuit .....................................................................9A-7
5.0 Frequency Generation Circuitry.........................................................................9A-8
5.1 Synthesizer...................................................................................................9A-9
5.2 VCO - Voltage Controlled Oscillator...........................................................9A-10
6.0 Notes For All Schematics and Circuit Boards..................................................9A-12
7.0 Circuit Board/Schematic Diagrams and Parts List...........................................9A-13
UHF (403-470MHz) Main Board Top Side PCB No. 8480672Z01 .....................9A-13
UHF (403-470MHz) Main Board Bottom Side PCB No. 8480672Z01................9A-14
UHF Controls And Switches Schematic Diagram ..............................................9A-15
UHF Receiver Front End Schematic Diagram....................................................9A-16
UHF Receiver Back End Schematic Diagram ....................................................9A-17
UHF Synthesizer Schematic Diagram................................................................9A-18
UHF Voltage Controlled Oscillator Schematic Diagram .....................................9A-19

xiv
UHF Transmitter Schematic Diagram ................................................................ 9A-20
UHF Harmonic Filter Schematic Diagram.......................................................... 9A-21
UHF Radio Parts List ......................................................................................... 9A-22
8.0 Circuit Board/Schematic Diagrams and Parts List .......................................... 9A-25
UHF (403-470MHz) Main Board Top Side PCB No. 8480672Z04..................... 9A-25
UHF (403-470MHz) Main Board Bottom Side PCB No. 8480672Z04 ............... 9A-26
UHF Controls And Switches Schematic Diagram.............................................. 9A-27
UHF Receiver Front End Schematic Diagram ................................................... 9A-28
UHF Receiver Back End Schematic Diagram.................................................... 9A-29
UHF Synthesizer Schematic Diagram ............................................................... 9A-30
UHF Voltage Controlled Oscillator Schematic Diagram..................................... 9A-31
UHF Transmitter Schematic Diagram ................................................................ 9A-32
UHF Harmonic Filter Schematic Diagram.......................................................... 9A-33
UHF Radio Parts List ......................................................................................... 9A-34
9.0 Circuit Board/Schematic Diagrams and Parts List .......................................... 9A-38
UHF (403-470MHz) Main Board Top Side PCB No. 8480672Z06..................... 9A-38
UHF (403-470MHz) Main Board Bottom Side PCB No. 8480672Z06 ............... 9A-39
UHF Controls And Switches Schematic Diagram.............................................. 9A-40
UHF Receiver Front End Schematic Diagram ................................................... 9A-41
UHF Receiver Back End Schematic Diagram.................................................... 9A-42
UHF Synthesizer Schematic Diagram ............................................................... 9A-43
UHF Voltage Controlled Oscillator Schematic Diagram..................................... 9A-44
UHF Transmitter Schematic Diagram ................................................................ 9A-45
UHF Harmonic Filter Schematic Diagram.......................................................... 9A-46
UHF Radio Parts List ......................................................................................... 9A-47
10.0 Troubleshooting charts.................................................................................... 9A-51
Troubleshooting Flow Chart for Controller......................................................... 9A-51
Troubleshooting Flow Chart for Receiver (Sheet 1 of 2).................................... 9A-52
Troubleshooting Flow Chart for Receiver (Sheet 2 of 2).................................... 9A-53
Troubleshooting Flow Chart for Transmitter ...................................................... 9A-54
Troubleshooting Flow Chart for Synthesizer...................................................... 9A-55
Troubleshooting Flow Chart for VCO................................................................. 9A-56
Section 9B Model Chart and Test Specifications (136-174 MHz)
1.0 Model Chart....................................................................................................... 9B-1
2.0 Specifications .................................................................................................... 9B-2
3.0 Transmitter ........................................................................................................ 9B-3
3.1 General ........................................................................................................ 9B-3
4.0 Receiver ............................................................................................................ 9B-5
4.1 Receiver Front-End...................................................................................... 9B-5
4.2 Receiver Back-End ...................................................................................... 9B-6
4.3 Automatic Gain Control Circuit .................................................................... 9B-7
5.0 Frequency Generation Circuitry ........................................................................ 9B-8
5.1 Synthesizer .................................................................................................. 9B-9

xv
5.2 VCO - Voltage Controlled Oscillator...........................................................9B-10
6.0 Notes For All Schematics and Circuit Boards..................................................9B-12
7.0 Circuit Board/Schematic Diagrams and Parts List...........................................9B-13
VHF (136-174MHz) Main Board Top Side PCB No. 8480675Z01 .....................9B-13
VHF (136-174MHz) Main Board Bottom Side PCB No. 8480675Z01 ................9B-14
VHF Controls And Switches Schematic Diagram...............................................9B-15
VHF Receiver Front End Schematic Diagram....................................................9B-16
VHF Receiver Back End Schematic Diagram ....................................................9B-17
VHF Synthesizer Schematic Diagram ................................................................9B-18
VHF Voltage Controlled Oscillator Schematic Diagram ....................................9B-19
VHF Transmitter Schematic Diagram.................................................................9B-20
VHF Radio Parts List..........................................................................................9B-21
8.0 Circuit Board/Schematic Diagrams and Parts List...........................................9B-24
VHF (136-174MHz) Main Board Top Side PCB No. 8480675Z03 .....................9B-24
VHF (136-174MHz) Main Board Bottom Side PCB No. 8480675Z03 ................9B-25
VHF Controls And Switches Schematic Diagram...............................................9B-26
VHF Receiver Front End Schematic Diagram....................................................9B-27
VHF Receiver Back End Schematic Diagram ....................................................9B-28
VHF Synthesizer Schematic Diagram ................................................................9B-29
VHF Voltage Controlled Oscillator Schematic Diagram ....................................9B-30
VHF Transmitter Schematic Diagram.................................................................9B-31
VHF Radio Parts List..........................................................................................9B-32
9.0 Circuit Board/Schematic Diagrams and Parts List...........................................9B-36
VHF (136-174MHz) Main Board Top Side PCB No. 8480675Z04 .....................9B-36
VHF (136-174MHz) Main Board Bottom Side PCB No. 8480675Z04 ................9B-37
VHF Controls And Switches Schematic Diagram...............................................9B-38
VHF Receiver Front End Schematic Diagram....................................................9B-39
VHF Receiver Back End Schematic Diagram ....................................................9B-40
VHF Synthesizer Schematic Diagram ................................................................9B-41
VHF Voltage Controlled Oscillator Schematic Diagram ....................................9B-42
VHF Transmitter Schematic Diagram.................................................................9B-43
VHF Radio Parts List..........................................................................................9B-44
10.0 Troubleshooting Charts ...................................................................................9B-49
Troubleshooting Flow Chart for Controller .........................................................9B-49
Troubleshooting Flow Chart for Receiver (Sheet 1 of 2) ....................................9B-50
Troubleshooting Flow Chart for Receiver (Sheet 2 of 2) ....................................9B-51
Troubleshooting Flow Chart for Transmitter.......................................................9B-52
Troubleshooting Flow Chart for Synthesizer ......................................................9B-53
Troubleshooting Flow Chart for VCO .................................................................9B-54
Section 10 Flex Layout/Schematic Diagrams and Parts Lists
1.0 Keypad-Controller Interconnect Flex ................................................................. 10-1
2.0 Schematic for Keypad-Controller Interconnect Flex .......................................... 10-1
3.0 Schematic For Speaker/Mic Assembly - 0104008J99 ....................................... 10-2

xvi
4.0 Parts List for Speaker/Mic Assembly - 0104008J99 ..........................................10-2
Glossary of Terms....................................................................................... G-1

1-1
Section 1
INTRODUCTION
1.0 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.
2.0 Warranty and Service Support
Motorola offers long term support for its products. This support includes full exchange and/or repair
of the product during the warranty period, and service/ repair or spare parts support out of warranty.
Any "return for exchange" or "return for repair" by an authorised Motorola Dealer must be
accompanied by a Warranty Claim Form. Warranty Claim Forms are obtained by contacting an
Authorised Motorola Dealer.
2.1 Warranty Period and Return Instructions
The terms and conditions of warranty are defined fully in the Motorola Dealer or Distributor or
Reseller contract. These conditions may change from time to time and the following notes are for
guidance purposes only.
In instances where the product is covered under a "return for replacement" or "return for repair"
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 Services. All returns must be accompanied by a Warranty Claim Form, available from
your Customer Services representative. Products should be shipped back in the original packaging,
or correctly packaged to ensure no damage occurs in transit.
2.2 After Warranty Period
After the Warranty period, Motorola continues to support its products in two ways.
1. Motorola's Accessories and Aftermarket Division (AAD) offers a repair service to both end
users and dealers at competitive prices.
2. AAD supplies individual parts and modules that can be purchased by dealers who are techni-
cally 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.

1-2 Warranty and Service Support
2.3 Piece Parts
Some replacement parts, spare parts, and/or product information can be ordered directly. If a
complete Motorola part number is assigned to the part, it is available from Motorola’s 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 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.
All orders for parts/information should include the complete Motorola identification number. All part
orders should be directed to your local AAD office. Please refer to your latest price pages.

Warranty and Service Support 1-3
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 wherever possible. When contacting
Motorola Technical Support, be prepared to provide the product model number and the unit’s
serial number.
Toll-Free
Non-Toll-Free
Country or Territory Number
China 800-810-0976
Indonesia 0800-1-686868
Malaysia 1800-801687
Philippines 1800-16510271
Singapore 1800-4855333
Thailand 1800-225412
Country or Territory Number
China (86-10) 6843-8231
Hong Kong SAR (852) 2966-4188
India (91) 80-658-7677-7678
Indonesia (62-21) 251-3050
Korea (822) 3466-5401
Malaysia (603) 7803-9922
Philippines (63-2) 810-0762
Singapore (65) 486-7171
Taiwan (886) 2-27058000 ext. 6308
Thailand (66) 2254-8388
Vietnam (84) 8-8294091
All Other Countries IDD Code+(65)-4855333

1-4 Radio Model Information
3.0 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 specific characteristics.
Table 1-1 Radio Model Number (Example: AZH34KDC9AA3)
Type
of
Unit
Model
Series
Freq.
Band
Power
Level
Physical
Packages
Channel
Spacing Protocol Feature
Level
AZ H 34 K
VHF
(136-
174
MHz)
D
4-5W
C
GP88s
9
Programma-
ble
AA
Conventional
3
GP88s
R
UHF
(403-
470
MHz)
H = Portable
AZ = Country Code