LBI-38378C Mobile Communications M-PA VHF PORTABLE FM RADIO TABLE OF CONTENTS REAR COVER ASSEMBLY . . . . . . . . FRONT COVER ASSEMBLY (EARLIER) AND CONTROL BOARD . . . . . . . . . FRONT COVER ASSEMBLY (LATER) LESS CONTROL BOARD . . . . . . . . . CONTROL BOARD (LATER) . . . . . . . VHF SERVICE SECTION . . . . . . . . . . . . . LBI-38597 . . . . LBI-38384 . . . . LBI-38834 . . . . LBI-38828 . . . .
LBI-38378 TABLE OF CONTENTS Page SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 OPTIONS AND ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 5 DESCRIPTION . . .
LBI-38378 SPECIFICATIONS* GENERAL Frequency Bands (FCC Type Acceptance Number) 136 - 150.8 MHz 146 - 162 MHz (AXATR-182-B5) 157 - 174 MHz (AXATR-182-C5) DOC Number TR-182-D2 Frequency Stability 5.0 ppm Channel Capacity Select Model Scan Model System Model 16 192 192 Maximum Frequency Separation full bandsplit Channel Spacing 30 kHz Operating Temperature Range -30°C to +60°C Maximum Relative Humidity 90% at 55°C Battery Voltage 7.
LBI-38378 Radios, Antennas, Batteries OPTIONS AND ACCESSORIES Carrying Accessories Audio Accessories Chargers 4
LBI-38378 INTRODUCTION The M-PA radio is a high quality microprocessor controlled synthesized portable FM radio. M-PA operation is highlighted by the radio’s programming versatility. This allows tailored operation of the portable radio to meet the needs of the radio system and the individual users. Three (3) different M-PA radio models are available: Select, Scan and System. The M-PA Select model radio is the basic version that can be programmed with up to sixteen (16) channels.
LBI-38378 • Programmable Multi-Tone Channel Guard (CTCSS) - Channel Guard tone frequencies within the range of 67 Hz to 210.7 Hz, including all of the standard EIA frequencies, can be programmed for encoded/decoded operation. • Programmable Multi-Code Digital Channel Guard - Similar capability as with tone Channel Guard is provided. • Two-Tone Sequential (T99) Decode - Selective calling decode is enabled or disabled on each individual channel.
LBI-38378 Figure 1 - System Model Figure 2 - Scan Model Figure 3 - Select Model Figure 4 - Side View (All Models) 7
LBI-38378 REAR COVER ASSEMBLY The Rear Cover Assembly houses the RF Board in the die-cast aluminum case. The complete assembly consists of the VHF RF Board, aluminum case, top antenna jack, side (UDC) antenna jack and various hardware. The RF Board’s circuitry includes the transmitter, receiver and the frequency synthesizer. This FM circuitry is under complete control of the microprocessor circuits.
LBI-38378 pack in need of a charge will cause the low battery "BAT" status flag on the radio to turn on. This flag will turn on when the battery pack’s voltage drops below approximately 6.8 Volts. The low battery alert tone will also be heard when the battery pack needs charging. RECHARGEABLE BATTERY PACK DISPOSAL The product that you have purchased contains a rechargeable battery. The battery is recyclable.
LBI-38378 TABLE 2 - UDC PIN FUNCTIONS PIN NAME INPUT OR OUTPUT 1 GROUND ------- Case Ground 3 UDC RX AUDIO Output Test Point For Speaker Audio 4 SWBATT Output Switched Accessory Power 5 EXT PTT Input External Microphone PTT Input 6 TX DATA Input For Programming 7 RX DATA Output For Programming 8 SPARE 9 UDC VOLT ------- Option/Accessory Sense Pin 10 T/R Output Low = Transmit, High = Receive 11 UDC MUTE Output Low = Audio Muted 12 EXT MIC HI Input External Micropho
LBI-38378 • Two individual Type 99 Tone Group Sets • Control Knob selects Channels, Modes or Channel Guard* • Menu Selections* • Home Mode or Home Channel (depending on Control Knob programming) or Disabled* • Scan Enabled or Disabled* • Scan with Channel Guard Enabled or Disabled* • Scan Across Modes Enabled or Disabled* • Priority-One Scan Channel is the Selected Channel, Fixed Channel or Keypad Entered Channel* • Ten (10) Telephone Numbers and Names* • DTMF Options* * Scan and System models only OPERATO
LBI-38378 PANC1B (19B234804P1) Antenna, 136 - 151 MHz, Helical PANC1C (19B234804P2) Antenna, 146 - 162 MHz, Helical PANC1D (19B234804P3) Antenna, 157 - 174 MHz, Helical PAHC1C Belt Clip PAHC1D Swivel Mount with Belt Loop PAHC1E Case, Leather, with Belt Loop (Short Case) PAHC1F Case, Leather, with Belt Loop (Tall Case) PAHC1G Case, Leather, with Swivel Mount and Belt Loop (Short Case) PAHC1H Case, Leather, with Swivel Mount and Belt Loop (Tall Case) PAHC1K Shoulder Strap, Leather, with Mou
LBI-38378 DISASSEMBLY / REASSEMBLY In the event internal service is required, disassemble the radio in accordance with the following outlined steps. See Figures 6 - 10. Reassemble the unit by following the steps in reverse order. Observe screw lengths and do not over tighten the screws when reassembling the unit. Torque specifications are listed in Table 3. CAUTION ALWAYS remove the battery pack before disassembling the unit to avoid blowing the fuse or causing other component damage.
LBI-38378 RF Board Access Holes are located in the RF Board shield for alignment of the Reference Oscillator (U3), Modulation Balance pot (R18), VCO Modulation pot (R19), 2nd Local Oscillator Adjustment (T1), and the Quadrature Detector Adjustment (T2). To align these items, shield removal is not necessary. the chip component side of the board that secure it to the casting. Reassemble the unit in reverse order. Observe screw lengths.
LBI-38378 TION: Installation of screws that are longer than the originals may damage the LCD Board, flex circuits or the threads. To remove the Control Board, remove the Torx screw (E) in the lower left-hand corner that supplies battery power to the board. An earlier Front Cover Assembly has an additional screw located just below connectors J1/P1 (EE). Lift the board and carefully unplug Speaker Flex plug P3 from J3 on the Control Board. Avoid bending this or any other flex circuits at sharp angles.
LBI-38378 BLOCK DIAGRAM Figure 11 - Rear Cover Assembly Block Diagram 16
BLOCK DIAGRAM LBI-38378 Figure 12 - Front Cover Assembly (Earlier) And Control Board Block Diagram 17
LBI-38378 Later Front Cover Assembly Keypad Flex Removal Speaker Flex Removal To remove the Keypad Flex, first remove the UDC Flex/UDC/Monitor Button/PTT Switch assembly as previously stated. Next remove the screw securing the emergency switch support (G) then remove the support. Remove the knobs using the hex driver. With a spanner wrench, remove the nuts securing the volume and channel controls and carefully slide the controls inside the radio.