Motorola GP360 Service Information

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Table of Contents
Chapter 1 THEORY OF OPERATION
1.0 Overview ..............................................................................................................1-1
2.0 Radio Power Distribution .....................................................................................1-1
3.0 Controller Circuits ................................................................................................1-2
3.1 Controller Architecture....................................................................................1-2
3.2 MCU Digital Architecture ................................................................................1-2
3.3 Real Time Clock .............................................................................................1-3
3.4 ModB/Vstby Supply ........................................................................................1-4
3.5 Audio/Signaling Architecture ..........................................................................1-4
Chapter 2 TROUBLESHOOTING CHARTS
1.0 300R1 Controller..................................................................................................2-1
2.0 VHF Controller (except models with PCB 8486473Z04 ) ......................................2-2
3.0 VHF Controller (for models with PCB 8486473Z04 ) ............................................2-3
4.0 Lowband Controller..............................................................................................2-4
Chapter 3 CONTROLLER SCHEMATICS
1.0 Allocation of Schematics and Circuit Boards .......................................................3-1
2.0 Controller - Set 1 (PCB 8486062B12/B14, 8485726Z01)....................................3-5
3.0 Controller - Set 2 (PCB 8486101B09/B10) ........................................................3-11
4.0 Controller - Set 3 (PCB 8485658Z01)................................................................3-17
5.0 Controller - Set 4 (PCB 8486062B16/17, 8486101B11) ....................................3-23
6.0 Controller - Set 5 (PCB 8485726Z04)................................................................3-29
7.0 Controller - Set 6 (PCB 8486473Z04)................................................................3-35

Motorola GP360 Specifications

Battery

battery life with standard high capacity NiMH battery low power	11 hours
battery life with standard high capacity NiMH battery high power	8 hours
battery life with ultra high capacity NiMH battery low power	14 hours
battery life with ultra high capacity NiMH battery high power	11 hours
battery life with NiCD battery low power	12 hours
battery life with NiCD battery high power	9 hours
battery life with Li-lon low power	11 hours
battery life with Li-lon high power	8 hours

Operating Environment

operating temperature	-20°C to +55°C
sealing	Withstands rain testing per MIL STD 810 C/D/E and IP54
shock and vibration	Protection via impact resistant housing exceeding MIL STD 810-C/D/E and TIA/EIA 603
dust and humidity	Protection via environment resistant housing exceeding MIL STD 810 C/D/E and TIA/EIA 603

Transmitter Specifications

frequencies full bandsplit VHF	136-174 MHz
frequencies full bandsplit UHF	403-470 MHz
channel spacing	12.5/20/25 kHz
frequency stability	±2.5 ppm
power VHF	1-5W
power UHF	1-4W

Receiver Specifications

frequencies full bandsplit VHF	136-174 MHz
frequencies full bandsplit UHF	403-470 MHz
channel spacing	12.5/20/25 kHz
frequency stability	±2.5 ppm
sensitivity (12 dB SINAD) EIA	0.25 µV typical
sensitivity (20 dB SINAD) EN	0.50 µV typical

Weight and Dimensions

dimensions with standard high capacity NiMH battery	137 x 57.5 x 37.5 mm
dimensions with ultra high capacity NiMH battery	137 x 57.5 x 40.0 mm
dimensions with NiCD battery	137 x 57.5 x 40.0 mm
dimensions with Li-lon battery	137 x 57.5 x 33.0 mm
weight with standard high capacity NiMH battery	428 gm
weight with ultra high capacity NiMH battery	508 gm
weight with NiCD battery	458 gm
weight with Li-lon battery	358 gm