GP350 Portable Radios 146-174 MHz 438-470 MHz 6880904Z07-O
*6880904Z07* *6880904Z07* 6880904Z07-O Motorola Radius Division Hwy 34 West Mt.
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.
Table of Contents Scope of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v How to Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v Other Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GP350 Portable Radios Service Manual Section 4 Theory of Operation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Microcomputer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Microcomputer Power-Up and Reset Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Receiver . . . . . . . . . . . . . . . . . . .
GP350 Portable Radios Service Manual Section 6 Component Location Diagrams, Schematic Diagrams, Exploded Views, and Parts Lists General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Transceiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GP350 Portable Radios Service Manual iv 6880904Z07-O August, 1996
GP350 Portable Radios Service Manual Foreword Scope of Manual Scope of Manual This manual is intended for use by experienced technicians familiar with similar types of equipment. It contains all service information required for the equipment described and is current as of the printing date. Changes which occur after the printing date are incorporated by instruction manual revision. These revisions are added to the manuals as the engineering changes are incorporated into the equipment.
Foreword GP350 Portable Radios Service Manual Model Charts Description 2-Chan., 20/25 kHz (146-174 MHz) 16-Chan., 20/25 kHz (146-174 MHz) Model P93MGC20A2A_ P93MGC20C2A_ Model Charts GP350 VHF 146 - 174 MHz X = Indicates one of each required Item X X X HHN9126_ Housing HLD9440_ RF Board, 2-Chan., 20/25 kHz, (146-174 MHz) X HLD9441_ RF Board, 16-Chan.
GP350 Portable Radios Service Manual Foreword Description 2-Chan., 20/25 kHz (438-470 MHz) 16-Chan., 20/25 kHz (438-470 MHz) Model P94MGC20A2A_ P94MGC20C2A_ Model Charts GP350 UHF 438 - 470 MHz X = Indicates one of each required Item X X Description HHN9126_ Housing HLE9480_ RF Board, 2-Chan., 20/25 kHz (438-470 MHz) X HLE9481_ RF Board, 16-Chan.
Foreword GP350 Portable Radios Service Manual 16-Chan., 12.5 kHz (490-520 MHz) P94MGC00C4A_ 16-Chan., 20/25 kHz (490-520 MHz) P94MGC20C4A_ 16-Chan., 12.5 kHz (465-495 MHz) P94MGC00C3A_ 16-Chan., 20/25 kHz (465-495 MHz) P94MGCC20C3A_ Model Description Model Charts GP350 UHF 465 - 495 MHz 490 - 520 MHz X = Indicates one of each required This page has been intentionally left blank. Item X X X X viii Description HLE9487_ RF Board, 12.
GP350 Portable Radios Service Manual Foreword Accessories Accessories Antennas: NAD6502_R — Black 146-174 MHz VHF Antenna (Standard w/Unit) HAD9742 — Black 146-162 MHz VHF Stubby Antenna HAD9743 — Blue 162-174 MHz VHF Stubby Antenna NAE6483_R — None 403-520 MHz UHF Antenna (Standard w/Unit) NAE6521_R — Red 400-440 MHz UHF Stubby Antenna NAE6522_R — Green 438-470 MHz UHF Stubby Antenna HAD9728 Tunable Antenna Kit (136-174 MHz) — None Note: Each of the color coded antennas listed is design
Foreword GP350 Portable Radios Service Manual Accessories Nickel-Cadmium Battery Chargers: HTN9630 HTN9702 HTN9748 HTN9802 HTN9804 HTN9811 HTN9803 HTN9805 HTN9812 HLN9719 HLN9944 120 Volt - 1 Hour Rapid Rate Charger 120 Volt - 10 Hour Standard Rate Charger 120 Volt - 6 Unit - 1 Hour Rapid Rate Charger 220 Volt - 1 Hour Rapid Rate Charger (European Plug) 220 Volt - 10 Hour Standard Rate Charger (European Plug) 220 Volt - 6 Unit - 1 Hour Rapid Rate Charger (European Plug) 240 Volt - 1 Hour Rapid Rate Char
GP350 Portable Radios Service Manual Foreword Performance Specifications Performance Specifications GENERAL Model Series: VHF UHF P93MGC P94MGC Frequency: 146-174 Channel Capacity: 438-470 2 or 16 channels 2 or 16 channels Power Supply: One (1) rechargeable Nickel-Cadmium battery (7.5V) Dimensions†: 5.54” X 2.48” X 1.79” (142 X 63X 45.6mm)† Weight †: 17.8 oz. (509 g)† Average Battery Life (5-5-90 Duty Cycle): High Capacity: Low Power 10.
Foreword GP350 Portable Radios Service Manual Service Aids Service Aids The following table lists service aids recommended for working on the GP350. Motorola Part No. Description Application HLN9214 Radio Interface Box Enables communication between the radio and the computer’s serial communications adapter. HSN9412 RIB Power Supply Used to supply power to the RIB. HKN9216 Computer Interface Cable Connects the computer’s serial communications adapter to the RIB.
GP350 Portable Radios Service Manual Foreword Radio Model Information Test Set Service Cable P1 NOTE: Pins 2 and 7 are cut. 4 tip 6 12 6 12 14 Speaker (Hi) 3.5 mm plug 5 Ground 47 ohm, 1/2w sleeve 7 3 2 External Select External Speaker 14 8 11 1 9 + 1.0 uF sleeve Speaker Common External Microphone tip 2.5 mm plug (P1) DETAIL FRONT SIDE 33k, 1/8 w VIEWED FROM POGO PIN SIDE OF ADAPTER 9 Speaker (Lo) 11 2 3 Gnd 4 Mic.
Foreword GP350 Portable Radios Service Manual Radio Service Software Information Radio Service Software Information To run the Radio Service Software, you will need the following equipment: Required Equipment: 1. IBM XT, AT, Convertible, or System/2 Model 30/50TM with 512K RAM, Dual Floppy Disk Drives or on Floppy Disk and one Hard Disk. 2. PCDOSTM or MSDOSTM 3.0 or later. 3. Radio Interface Box (RIB) HLN9214. 4. RIB to IBM AT cable HKN9216. 5. IBM AT cable to IBM XT computer adapter (optional) HLN9390.
Section 1 Safety Information General FCC Safety Information This manual includes specifications, fundamental disassembly/reassembly procedures, schematic diagrams, component location diagrams, flex circuit diagrams, several parts lists, theory of operation, and troubleshooting sections to cover the GP350 radios. Hereafter, the text will refer collectively to the GP350 radios as “this family of radios.” For operation of the radio, refer to the applicable manual available separately.
Safety Information GP350 Portable Radios Service Manual FCC Safety Information This page has been intentionally left blank.
Section 2 Intrinsically Safe Radio Information FMRC Approved Equipment Anyone intending to use a radio in a location where hazardous concentrations of flammable 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 [classified] locations).
Intrinsically Safe Radio Information GP350 Portable Radios Service Manual Repair of FMRC Approved Products 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.
Section 3 Disassembly/Reassembly Remove Battery 1. Locate the battery latch on the bottom of the radio. Push the battery latch toward the front of the radio and hold it in the open position as shown in Figure 3-1. Figure 3-1.MAEPF-25233-O 2. While holding the battery latch in the open position, slide the battery down approximately 1/2 inch and then off the radio housing as shown in Figure 3-2. Figure 3-3. 3.
Disassembly/Reassembly GP350 Portable Radio Service Manual Remove the Main Board 3. After all four chassis clips have been removed, separate the main board from the chassis as shown in the exploded view Figure 3-7. Flex Cable Figure 3-5. 5. MAEPF-25237-O Pull the chassis out and away from the housing as shown by the arrow in Figure 3-5. Remove the Main Board 1. 2. The main board is sandwiched between the front shield and the chassis. Four chassis clips hold the sandwiched assembly together.
Section 4 Theory of Operation Overview Receiver This section provides a detailed theory of operation for the GP350 and its components: the microcomputer, the receiver, the transmitter, and the frequency generation circuitry. The receiver of the GP350 UHF and VHF radios consists of 4 major blocks each: the front-end module, the double balanced mixer, the 45.1 MHz IF and the back-end IF IC.
Theory of Operation GP350 Portable Radios Service Manual Transmitter The insertion loss of this filter is approximately 1.9 db for VHF and 3.5 db for UHF. The filter is designed to be terminated with the amplifier output impedance on one side, and 50 ohm on the other. The net gain from the receiver module is about (12.2 db VHF) (10.8 db UHF) in the center of the band and about (10.7 db VHF) (9.5 db UHF) at the band edges. The net center of the band noise figure is approximately (5.5 db VHF) (5.2 db UHF).
GP350 Portable Radios Service Manual TheoryofOperation Frequency Generation Circuitry to minimize the error produced at the emitter of Q156 resulting from the voltage offset at the input of U151A. The voltage at the other input of the summing amplifier, U151B, is supplied from two DACs contained within U152. These DACs are controlled by the microprocessor, and provide the reference voltage for the control loop.
Theory of Operation GP350 Portable Radios Service Manual Frequency Generation Circuitry When a “high” impedance is applied to U251 pin 5, the VCO is operating in BATTERY SAVER mode. In this case, both the receive and transmit oscillators as well as the receive, transmit, and pre-scaler buffer are turned off. In the Fractional-N, the battery saver mode places the A/D and the modulation attenuator in the off state. This mode is used to reduce current drain on the radio.
GP350 Portable Radios Service Manual TheoryofOperation Frequency Generation Circuitry Limiter (Audio Filter IC) The audio filter IC U402 contains the limiter circuit, which prevents over-deviation of the RF carrier by symmetrically clipping the peaks of the modulating voltage. Audio from the pre-emphasis amplifier circuit is coupled to the limiter. Gain of the limiter stage is adjustable in four 3 dB steps, from -3 dB to +6 dB.
Theory of Operation GP350 Portable Radios Service Manual Frequency Generation Circuitry 15k-ohm impedance. P1-7 is always unmuted, not affected by the receiver with squelch circuit. Option RX audio input to the GP350 radio is available at P1-6, with a sensitivity of 100 mVrms at less than 200 ohm output impedance from option board. RX Audio Mute Gate PNP transistor Q406, the RX audio mute gate, with resistors R458 and R459, and capacitors C432 and C433, provide receiver audio muting.
INSERT PAGE SIZE AND RADIO BLOCK DIAGRAM FROM MANUAL 6880902Z30-D, PAGE 2-7 GP350 Portable Radio Functional Block Diagram August, 1996 6880904Z07-O 4-7
INSERT PAGE SIZE, RECEIVER BLOCK DIAGRAM, TRANSMITTER BLOCK DIAGRAM, VCO BLOCK DIAGRAM, SYNTHESIZER BLOCK DIIAGRAM, AND AFIC BLOCK DIAGRAM FOR MANUAL 6880902Z30-D, PAGE 2-8 Receiver, Transmitter, VCO, Synthesizer, and AFIC Block Diagrams 4-8 6880904Z07-O August, 1996
Section 5 Troubleshooting Overview This section contains three troubleshooting tables for the following GP350 components: • Receiver • Transmitter • Synthesizer • Microprocessor • Voltage Controlled Oscillator (VCO) Troubleshooting Charts Refer to following pages.
INSERT LINE ART FROM MANUAL 6880902Z30-D, PAGE 4-3 Troubleshooting Flow Chart for Receiver 5-2 6880904Z07-O August, 1996
INSERT LINE ART FROM MANUAL 6880902Z30-D, PAGE 4-4 Troubleshooting Flow Chart for Transmitter August, 1996 6880904Z07-O 5-3
INSERT LINE ART FROM MANUAL 6880902Z30-D, PAGE 4-5 Troubleshooting Flow Chart for Synthesizer 5-4 6880904Z07-O August, 1996
INSERT LINE ART FROM MANUAL 6880902Z30-D, PAGE 4-6 Troubleshooting Flow Chart for Microprocessor August, 1996 6880904Z07-O 5-5
INSERT LINE ART FROM MANUAL 6880902Z30-D, PAGE 4-7 Troubleshooting Flow Chart for VCO 5-6 6880904Z07-O August, 1996
External Microphone External Speaker External Select Internal Microphone Ground Internal Speaker Flex Circuit Speaker Common Battery Filter Board Section 616 Section 7 Component Location Diagrams, Schematic Diagrams, and Parts Lists for Battery Filter Board and Flex Circuit General Controller components and transceiver components are all part of a single circuit board. Two circuit boards (component location diagrams), VHF and UHF, show transceiver and controller components.
MAEPF-25481-O Component Location Diagram for HLD9440A and HLD9441A VHF, 146-174MHz, Transceiver and Controller MAEPF-25482-O 6-2 6880904Z07-O August 13, 1996
Schematic Diagram for HLD9440A and HLD9441A VHF, 146-174MHz, Transceiver Section August 13, 1996 6880904Z07-O 6-3
MAEPF-25483-O Component Location Diagram for HLE9480A and HLE9481A UHF, 438-470MHz, Transceiver Section 6-4 6880904Z07-O MAEPF-25484-O August 13, 1996
Schematic Diagram for HLE9480A and HLE9481A UHF, 438-470MHz, Transceiver Section August 13, 1996 6880904Z07-O 6-5
Schematic Diagram for Controller Section 6-6 6880904Z07-O August 13, 1996
Parts List: Controller Components (for all bandsplits) REFERENCE SYMBOL MOTOROLA PART NO. DESCRIPTION CAPACITOR, Fixed pF +/-5%; 50V unless stated C401 2113740A41 33pF C402 2113740G16 3.6pF C403 NU C404 2113740A37 C405 2160521G37 0.1uF C406 2113741A45 10nF C407 2311049A40 2.2uF C408 2160521G37 0.1uF C409, 410 2113740A59 150pF, UHF Only C412 2311049A07 1uF C413 2311049A05 0.47uF C414 2160521G37 0.1uF C415 2113741A37 4.7nF C416 2160521G37 0.1uF C421 2311049A05 0.
Parts List: HLD9440A and HLD9441A, 146-174MHz VHF Transceiver REFERENCE SYMBOL MOTOROLA PART NO. DESCRIPTION HLD9440A and HLD9441A, 146-174MHz VHF Transceiver Board REFERENCE SYMBOL MOTOROLA PART NO. DESCRIPTION HLD9440A and HLD9441A, 146-174MHz VHF Transceiver Board REFERENCE SYMBOL MOTOROLA PART NO. DESCRIPTION HLD9440A and HLD9441A, 146-174MHz VHF Transceiver Board REFERENCE SYMBOL MOTOROLA PART NO. HLD9440A and HLD9441A, 146-174MHz VHF Transceiver Board MOTOROLA PART NO.
Parts List: HLE9480A and HLE9481A, 438-470MHz UHF Transceiver REFERENCE SYMBOL MOTOROLA PART NO. DESCRIPTION HLE9480A and HLE9481A, 438-470MHz UHF Transceiver REFERENCE SYMBOL MOTOROLA PART NO. DESCRIPTION HLE9480A and HLE9481A, 438-470MHz UHF Transceiver REFERENCE SYMBOL MOTOROLA PART NO. DESCRIPTION HLE9480A and HLE9481A, 438-470MHz UHF Transceiver REFERENCE SYMBOL MOTOROLA PART NO. DESCRIPTION HLE9480A and HLE9481A, 438-470MHz UHF Transceiver REFERENCE SYMBOL MOTOROLA PART NO.
Parts List: GP350 Basic Mechanical REFERENCE SYMBOL MOTOROLA PART NO.
INSERT PAGE SIZE, ARTWORK, AND TEXT FROM MANUAL: 6880902Z30-D, PAGE 51 HLN9960A DTMF Circuit Board Detail August 13, 1996 6880904Z07-O 6-11
INSERT PAGE SIZE, ARTWORK, AND TEXT FROM MANUAL: 6880902Z30-D, PAGE 52 HLN9960A DTMF Schematic Diagram and Parts List 6-12 6880904Z07-O August 13, 1996
GP300 / GP350 / P110 Chargers & Power Supplies Battery Charger Rate/Voltage Power Supply HTN9630 1 Hour / 120 V 25-80162R01 HTN9702 10 Hour / 120 V 25-80955Z02 HTN9748 (6 unit) 1 Hour / 120 V 25-80427B01 HTN9938 (6 unit) 1 Hour / 100 V 25-80427B01 HTN9802 1 Hour / 220 V 25-80162R02 (European Plug) HTN9804 10 Hour / 220 V 25-80955Z03 (European Plug) HTN9811 (6 unit) 1 Hour / 220 V 25-80427B01 (European Plug) HTN9803 1 Hour / 240 V 25-80162R03 (U. K.
INSERT PAGE SIZE, ARTWORK, AND TEXT FROM MANUAL: 6880902Z30-D, PAGE 54 Battery Chargers Single and Multi-Unit Rapid Rate (1 Hour) 6-14 6880904Z07-O August 13, 1996
INSERT PAGE SIZE, ARTWORK, AND TEXT FROM MANUAL: 6880902Z30-D, PAGE 55 Battery Chargers Standard Rate (10 Hour) August 13, 1996 6880904Z07-O 6-15
INSERT PAGE SIZE, ARTWORK, AND TEXT FROM MANUAL: 6880902Z30-D, PAGE 56 Battery Chargers Standard Rate (10 Hour) 6-16 6880904Z07-O August 13, 1996
L2 MK1 L1 C1 C2 Pin #2 (White) C3 L3 L4 Pin #4 (Blue) R1 Pin #5 (None) Pin #1 (Red) LS1 C4 Pin #3 (Black) Parts List: HMN9041A Remote Speaker/Microphone REFERENCE SYMBOL MOTOROLA PART NO. DESCRIPTION C1 C2 C3 C4 2113740A53 2113740A67 2113741A53 2113741A69 CAPACITOR, Fixed: uF +/-10%; 100V; unless otherwise stated 82pF, +/-5%, 50V 330pF, +/-5%, 50V .022uF, +/-5%, 50V 0.
Parts List: HMN9041A Remote Speaker/Microphone REFERENCE SYMBOL MOTOROLA PART NO. 0105953N42 3305259Q01 4505182Q01 3501152J01 1105461R01 0180492E01 0180703Y67 3905834K06 3205231Q01 1405219Q01 0180703Y69 5005910P05 7505283Q02 3205690R01 6405689R01 0300139982 1505172Q01 0484345A06 0305137Q02 0105959N54 0300139982 5405258Q25 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 21 20 19 18 DESCRIPTION Front housing, items 1 thru 5 Nameplate, Motorola Lever, PTT Grille, cloth Adhesive Acc. Conn.
