Motorola Gp328plus Gp338plus Gp338xls Detailed 6804112j28 G Manual

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Operational Cautions
Intrinsically Safe Radio Information
The Intrinsically safe approval unit refers to a product that has been approved as intrinsically safe by 
an approval agency (for example FM Approvals, CSA, UL, or Cenelec) and certifies that a particular 
product meets the Agencys applicable intrinsic safety standards for specific types of hazardous 
classified locations. A portable radio that has been approved for intrinsic safety will have Approval 
label attached to the radio to identify...

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A modification changes the units hardware from its original design configuration. Modifications can 
only be made by the original product manufacturer.
Repair
A repair constitutes something done internally to the unit that would bring it back to its original 
condition.
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.
Do Not...

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Table of Contents
Document History  ............................................................................................. i
Safety Information  .......................................................................................... iii
Section 1Introduction
1.0 Scope of Manual .................................................................................................. 1-1
2.0 Warranty and Service Support............................................................................. 1-1...

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Controller Audio Power Amplifier Schematic Diagram..........................................4-15
Controller Parts List for VHF (for 8404051G07/G08 and 8404051G09)...............4-16
Controller Parts List for UHF 1, UHF 2 and 330MHz (for 8404051G07/G08 and 
8404051G09) ................................................................................................4-17
3.7 Controller Board Diagrams ...........................................................................4-18
Controller Board Top View...

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VHF Receiver Front End Schematic Diagram ....................................................5A-22
VHF Receiver Back End Schematic Diagram ....................................................5A-23
VHF Synthesizer Schematic Diagram................................................................5A-24
VHF Voltage Controlled Oscillator Schematic Diagram .....................................5A-25
VHF Transmitter Schematic Diagram.................................................................5A-26
VHF...

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Troubleshooting Flow Chart for Controller ......................................................... 5B-29
Troubleshooting Flow Chart for Receiver (Sheet 1 of 2).................................... 5B-30
Troubleshooting Flow Chart for Receiver (Sheet 2 of 2).................................... 5B-31
Troubleshooting Flow Chart for Transmitter ...................................................... 5B-32
Troubleshooting Flow Chart for Synthesizer .........................................................

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 Troubleshooting Flow Chart for VCO ............................................................... 5C-36
Section 5DModel Chart and Test Specifications (330-400 Mhz)
1.0 Model Chart ...................................................................................................... 5D-1
2.0 Specifications (for GP328 Plus) ........................................................................ 5D-2
3.0 Specifications (for GP338 Plus)...

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2.0 Schematic for RF-Controller Interconnect Flex ....................................................6-2
3.0 Universal Connector Flex .....................................................................................6-3
3.1 GP328 Plus.....................................................................................................6-3
3.2 GP338 Plus/GP338 XLS.................................................................................6-4
4.0 Schematic for Universal Connector Flex...

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...

1-2Warranty 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...