Motorola GP320 Series Operating and installation instructions

Professional Radio
GP Series
VHF (136-174MHz)
Service Information
Issue: June 2002

ii
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
products 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.

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Table of Contents
Chapter 1 MODEL CHART AND TECHNICAL SPECIFICATIONS
1.0 GP320/GP340/GP360/GP380 Model Chart.........................................................1-1
2.0 GP140 Model Chart .............................................................................................1-2
3.0 GP640/GP680 Model Chart .................................................................................1-2
4.0 GP1280 Model Chart ...........................................................................................1-3
5.0 GP240/GP280/GP540/GP580 Model Chart.........................................................1-4
6.0 Technical Specifications ......................................................................................1-5
Chapter 2 THEORY OF OPERATION
1.0 Introduction ..........................................................................................................2-1
2.0 VHF Transmitter...................................................................................................2-1
2.1 Power Amplifier ..............................................................................................2-1
2.2 Antenna Switch...............................................................................................2-2
2.3 Harmonic Filter ...............................................................................................2-2
2.4 Antenna Matching Network ............................................................................2-2
2.5 Power Control Integrated Circuit (PCIC) ........................................................2-2
3.0 VHF Receiver.......................................................................................................2-3
3.1 Receiver Front-End ........................................................................................2-3
3.2 Receiver Back-End.........................................................................................2-4
3.3 Automatic Gain Control (AGC) .......................................................................2-5
4.0 Frequency Generation Circuit ..............................................................................2-6
4.1 Synthesizer.....................................................................................................2-7
4.2 Voltage Controlled Oscillator (VCO)...............................................................2-8
5.0 Voice Storage (GP1280)....................................................................................2-10
Chapter 3 TROUBLESHOOTING CHARTS
1.0 Troubleshooting Flow Chart for Receiver (Sheet 1 of 2)......................................3-1
2.0 Troubleshooting Flow Chart for Receiver (Sheet 2 of 2)......................................3-2
3.0 Troubleshooting Flow Chart for Transmitter ........................................................3-3
4.0 Troubleshooting Flow Chart for Synthesizer........................................................3-4
5.0 Troubleshooting Flow Chart for VCO...................................................................3-5

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Chapter 4 VHF PCB/SCHEMATICS/PARTS LISTS
1.0 Allocation of Schematics and Circuit Boards .......................................................4-1
1.1 Controller Circuits...........................................................................................4-1
1.2 Voice Storage Facility..................................................................................... 4-1
2.0 VHF PCB 8486062B12 / Schematics ..................................................................4-3
3.0 VHF PCB 8486062B12 Parts List......................................................................4-11
4.0 VHF PCB 8486101B09 / Schematics (GP1280)................................................4-15
5.0 VHF PCB 8086101B09 Parts List (GP1280) .....................................................4-19
6.0 VHF PCB 8486062B14...................................................................................... 4-23
7.0 VHF PCB 8486062B14 Parts List......................................................................4-25
8.0 VHF PCB 8486101B10...................................................................................... 4-29
9.0 VHF PCB 8486101B10 Parts List (GP1280) .....................................................4-31
10.0 VHF PCB 8486062B16......................................................................................4-35
11.0 VHF PCB 8486062B16 Parts List...................................................................... 4-43

Chapter 1
MODEL CHART AND TECHNICAL SPECIFICATIONS
1.0 GP320/GP340/GP360/GP380 Model Chart
x = Indicates one of each is required.
* = Service replacement boards
Professional GP300 Series (VHF)
Model Description
MDH25KDC9AN0_E GP320 VHF 136-174MHz 5W 1-Ch
MDH25KDC9AN3_E GP340 VHF 136-174MHz 5W 16-Ch
MDH25KDF9AN5_E GP360 VHF 136-174MHz 5W 255-Ch
MDH25KDH9AN6_E GP380 VHF 136-174MHz 5W 255-Ch
Item Description
X PMLD4121_ *GP320 VHF Back Cover Kit
XPMLD4117_ *GP340 VHF Back Cover Kit
X PMLD4119_ *GP360 VHF Back Cover Kit
XPMLD4118_ *GP380 VHF Back Cover Kit
X 6864110B12 GP320 Basic User Guide
X6864110B13 GP340 Basic User Guide
X 6864110B16 GP360 Basic User Guide
X6864110B18 GP380 Basic User Guide
XXXX PMAD4023_ VHF14cm(150-161MHz)Antenna
XXXX HNN9008_ Battery, NiMH Standard

1-2 MODEL CHART AND TECHNICAL SPECIFICATIONS
2.0 GP140 Model Chart
3.0 GP640/GP680 Model Chart
Professional GP140 (VHF)
Model Description
MDH25KDC9AA3_E GP140 VHF 136-174 MHz 5W 16 Ch
Item Description
XPMLE4109_ *GP140 UHF Back Cover Kit
X 6864110B25 GP140 Basic User Guide
XPMAD4023_ VHF 14cm (150-161 MHz) Antenna
X HNN9008_ Battery, NiMH Standard
x = Indicates one of each is required.
* = Service replacement boards
Professional GP600 Series (VHF)
Model Description
MDH25KDC9ACK3_E GP640 VHF 136-174 MHz 5W
MDH25KDH9CK6_E GP680 VHF 136-174 MHz 5W
Item Description
XPMLD4113_ *GP640 VHF Back Cover Kit
X PMLD4114_ *GP680 VHF Back Cover Kit
X6864110B14 GP640 Basic User Guide
X 6864110B19 GP680 Basic User Guide
X X PMAD4023_ VHF 14cm (150-161 MHz) Antenna
X X HNN9008_ Battery, NiMH Standard
x = Indicates one of each is required.
* = Service replacement boards

GP1280 Model Chart 1-3
4.0 GP1280 Model Chart
Professional GP1280 (VHF)
Model Description
MDH25KDN9CK8_E GP1280 VHF 136-174 MHz 5W
Item Description
XPMLD4120_ *GP1280 VHF Back Cover Kit
X 6864110B20 GP1280 Basic User Guide
XPMAD4023_ VHF 14cm (150-161 MHz) Antenna
X HNN9008_ Battery, NiMH Standard
x = Indicates one of each is required.
* = Service replacement boards.

1-4 MODEL CHART AND TECHNICAL SPECIFICATIONS
5.0 GP240/GP540/GP280/GP580 Model Chart
One user guide is selectable via option.
x = Indicates one of each is required.
* = Service replacement boards.
Professional GP200/GP500 Series (VHF)
Model Description
MDH25KDC9GC3 GP540 VHF 136-174MHz 5W
MDH25KDH9GC6 GP580 VHF 136-174MHz 5W
MDH25KDC9GB3 GP240 VHF 136-174MHz 5W
MDH25KDH9GB6 GP280 VHF 136-174MHz 5W
Item Description
X X *PMLD4170_ GP240/GP540 VHF Back Cover Kit
X X *PMLD4171_ GP280/GP580 VHF Back Cover Kit
X X *PMLD4216_ GP240/GP540 VHF Front Housing Kit
X X *PMLD4373_ GP280/GP580 VHF Front Housing Kit
X X 6864120B15 GP240/GP280 User Guide (English)
X X 6864120B16 GP240/GP280 User Guide (ENG, RUS, FR, TUR)
X X 6864120B17 GP240/GP280 User Guide (GER, SPA, POR, IT)
X X 6864120B18 GP240/GP280 User Guide (SWE,NL, DAN, FIN)
X X 6864120B19 GP240/GP280 User Guide (CZ, PL, HU, RO)
X X 6864120B20 GP540/GP580 User Guide (English)
X X 6864120B21 GP540/GP580 User Guide (ENG, RUS, FR, TUR)
X X 6864120B22 GP540/GP580 User Guide (GER, SPA, POR, IT)
X X 6864120B23 GP540/GP580 User Guide (SWE,NL, DAN, FIN)
X X 6864120B24 GP540/GP580 User Guide (CZ, PL, HU, RO)
XXXX NAD6502_ Antenna(146-174MHz)HELIFLEX
XXXX HNN9008_ Battery, NiMH Standard

Technical Specifications 1-5
6.0 Technical Specifications
Data is specified for +25°C unless otherwise stated.
General Specifications
Channel Capacity
GP140
GP240, GP280
GP320
GP340
GP360, GP380
GP540, GP580
GP640, GP680, GP1280
16
128 in conventional Mode
1
16
255
128 in conventional Mode
16 (Conventional)
Power Supply Rechargeable battery 7.5v
Dimensions: H x W x D (mm) Height excluding knobs
With standard high capacity NiMH battery
With ultra high capacity NiMH battery
With NiCD battery
With Lilon battery
GP140/GP240/320/340/360/380/
GP580/640/680
137 x 57.5 x 37.5
137 x 57.5 x 40.0
137 x 57.5 x 40.0
137 x 57.5 x 33.0
With standard high capacity NiMH battery
With ultra high capacity NiMH battery
With NiCD battery
With Lilon battery
GP1280
152 x 57.5 x 37.5
152 x 57.5 x 37.5
152 x 57.5 x 37.5
152 x 57.5 x 37.5
Weight: (gm)
With Standard high capacity NiMH battery
With Ultra high capacity NiMH battery
With NiCD battery
With Lilon battery
GP140/GP240/ GP360/GP280
GP320/GP340/ GP380/GP580
GP540/GP640 GP680
420 428
500 508
450 458
350 358
With Standard high capacity NiMH battery
With Ultra high capacity NiMH battery
With NiCD battery
With Lilon battery
GP1280
460
535
485
390
Average Battery Life @5/5/90 Cycle:
With Standard high capacity NiMH battery
With Ultra high capacity NiMH battery
With NiCD battery
With Lilon battery
Low Power High Power
11 hours 8 hours
14 hours 11 hours
12 hours 9 hours
11 hours 8 hours
Sealing: Withstands rain testing per
MIL STD 810 C/D /E and IP54
Shock and Vibration: Protection provided via impact
resistant housing exceeding MIL STD
810-C/D /E and TIA/EIA 603
Dust and Humidity: Protection provided via environment
resistant housing exceeding MIL STD
810 C/D /E and TIA/EIA 603

1-6 MODEL CHART AND TECHNICAL SPECIFICATIONS
*Availability subject to the laws and regulations of individual countries.
Transmitter VHF
*Frequencies - Full Bandsplit VHF 136-174 MHz
Channel Spacing 12.5/20/25 kHz
Frequency Stability
(-25°C to +55°C, +25°Ref.) ±2.5 ppm
Power 136 - 174 MHz:1-5W
Modulation Limiting
±2.5 @ 12.5 kHz
±4.0 @ 20 kHz
±5.0 @ 25 kHz
FM Hum & Noise -40 dB typical
Conducted/Radiated Emission -36 dBm <1 GHz
-30 dBm >1 GHz
Adjacent Channel Power -60 dB @ 12.5 kHz
-70 dB @ 25 kHz
Audio Response (300 - 3000 Hz) +1 to -3 dB
Audio Distortion <5%typical
Receiver VHF
*Frequencies - Full Bandsplit VHF 136-174 MHz
Channel Spacing 12.5/20/25 kHz
Sensitivity (12 dB SINAD) EIA
Sensitivity (20 dB SINAD) ETS
0.35 µV typical
0.50 µV typical
Intermodulation EIA -65 dB
Adjacent Channel Selectivity -60 dB @ 12.5 kHz
-70 dB @ 25 kHz
Spurious Rejection -70 dB
Rated Audio 0.5W
Audio Distortion @ Rated Audio <3%typical
Hum & Noise -45 dB @ 12.5 kHz
-50 dB @ 20/25 kHz
Audio Response (300 - 3000 Hz) +1 to -3 dB
Conducted Spurious Emission
-57 dBm <1 GHz
-47 dBm >1 GHz
ETS 300 086