Ericsson M-PA LBI-38378D Page 1 Maintenance Manual Download | Manualshive

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LBI-38378D

M-PA



VHF

PORTABLE FM RADIO

TABLE OF CONTENTS

REAR COVER ASSEMBLY  .  .  .  .  .  .  . LBI-38597
FRONT COVER ASSEMBLY (EARLIER)
AND CONTROL BOARD  .  .  .  .  .  .  .  . LBI-38384
FRONT COVER ASSEMBLY (LATER)
LESS CONTROL BOARD  . .  . .  . .  . . LBI-38834
CONTROL BOARD (LATER)  .  .  .  .  .  . LBI-38828
VHF SERVICE SECTION  .  .  .  .  .  .  .  . LBI-38385

Maintenance Manual

ERICSSONZ

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Summary of Contents for M-PA LBI-38378D

Page 1: ... OF CONTENTS REAR COVER ASSEMBLY LBI 38597 FRONT COVER ASSEMBLY EARLIER AND CONTROL BOARD LBI 38384 FRONT COVER ASSEMBLY LATER LESS CONTROL BOARD LBI 38834 CONTROL BOARD LATER LBI 38828 VHF SERVICE SECTION LBI 38385 Maintenance Manual ERICSSONZ ...

Page 2: ...e Specifications 13 The software contained in this device is copyrighted by Ericsson Inc Unpublished rights are reserved under the copy right laws of the United States NOTE This manual is published by Ericsson Inc without any warranty Improvements and changes to this manual necessitated by typographical errors inaccuracies of current information or improvements to programs and or equipment may be ...

Page 3: ...7 grams 32 ounces TRANSMITTER Rated RF Power Output 6 0 Watts High Low RF Power Output 6 0 Watts 1 Watt programmable per channel Maximum FM Deviation 5 kHz FM Hum and Noise 45dB companion receiver Spurious and Harmonic Emissions 75 dBc Audio Response 1 to 3dB 6 dB octave pre emphasis from 300 Hz to 3 kHz Audio Distortion less than 3 at 1000 Hz tone 3 kHz deviation RECEIVER Sensitivity 12 dB SINAD ...

Page 4: ...OPTIONS AND ACCESSORIES Chargers Radios Antennas Batteries Carrying Accessories Audio Accessories LBI 38378D 4 ...

Page 5: ... to how the radio is programmed On the Select model radio the Control Knob selects the operating channel A stop plate may be installed under the knob to limit the maximum number of positions to less than sixteen 16 It is normally factory installed for fifteen 15 positions Volume Control Knob This rotatable control provides quick and easy adjustments to the volume level Minimum volume levels can be...

Page 6: ...ons such as key pressed CCT time out or a low battery Power Up Self Test At power up the radio automatically performs a diagnostic test on itself and reports any found errors via the LCD Programmable via the Universal Device Connector UDC The entire operation of the radio can be field customized by programming the unit using an IBM PC or compatible computer The programmed personality is stored in ...

Page 7: ...Figure 1 System Model Figure 2 Scan Model Figure 3 Select Model Figure 4 Side View All Models LBI 38378D 7 ...

Page 8: ...n the top of the radio is disabled BATTERY PACKS The battery pack connects to the bottom of the unit and delivers a nominal 7 5 Volts dc to the radio A recessed on off switch for the radio is located on the battery pack An internal fuse located in the radio s Battery Plate protects the radio and battery from excessive current draw The battery packs are available in several different capacities and...

Page 9: ...for field programming The Programming Manual and Software is TQ 3339 and TQ 4339 TQ 3339 is sup plied with 5 1 4 inch floppy disks and TQ 4339 is supplied with 3 1 2 inch disks This software uses a series of screens and windows to guide you through a programming session See TQ 3339 or TQ 4339 for further programming details PC Programming Adapter TQ 3370 and Programming Ca ble TQ 3311 will also be...

Page 10: ... 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 Microphone Audio Input 13 EXT EMER Input Lanyard Connection 34 UDC DISCR Output Test Point For RX Audio Figure 5 UDC Pin Out LBI 38378D 10 ...

Page 11: ...ery packs do not develop the Memory Effect Always observe all of the Federal Communication Commission s rules and regulations during any service or operating procedure INTRINSICALLY SAFE USAGE Selected portable radios with appropriate factory in stalled F4 Options are certified as Intrinsically Safe by the Factory Mutual Research Corporation Intrinsically Safe ap proval includes Class I II III Div...

Page 12: ... contact should become dirty or corroded communication range could be reduced Battery Packs Insure the battery packs are properly maintained Do not over or under charge them on a regular basis Verify the contacts are clean and free of corrosion Mechanical Since portable radio units are subject to shock and vi bration check for loose plugs knobs screws etc Transmitter Check Check transmit frequency...

Page 13: ...ng the unit verify the rubber gasket surrounding the perimeter of the cover is in good condition and it is in the groove Also verify the connector pins align properly For proper operation the screws should be tight ened so there is no gap between the covers It is recom mended that the top screws be tightened first while squeezing the radio together to ensure the gap is completely closed The bottom...

Page 14: ...ry the RF Board can be separated from the eggcrate casting Remove the two 2 Torx screws that secure the Power Amplifier Module and remove the four 4 screws on the chip component side of the board that secure it to the casting Reassemble the unit in reverse order Observe screw lengths Control Board Access To gain partial access to the Control Board remove the five 5 screws D securing the shield and...

Page 15: ...y accessible See Figure 9 UDC Flex UDC Monitor Button PTT Switch Assembly Removal If UDC Flex UDC Monitor Button PTT Switch assem bly removal is necessary first un solder the microphone With a spanner wrench remove the UDC securing screw the UDC ground pin Remove the insulator foam or plas tic on the inside side rail of the case Lift the UDC Monitor Button PTT Switch assembly from the side of the ...

Page 16: ...BLOCK DIAGRAM Figure 11 Rear Cover Assembly Block Diagram LBI 38378D 16 ...

Page 17: ...BLOCK DIAGRAM Figure 12 Front Cover Assembly Earlier And Control Board Block Diagram LBI 38378D 17 ...

Page 18: ...eaker Flex Removal In order to replace the Speaker Flex it must be un sol dered from the speaker and the Battery Plate LCD Board Access To remove the LCD Board partial removal actually re positioning of the top areas of the Keypad Flex is required UDC Flex UDC Monitor Button PTT Switch assembly re moval is not necessary After the top areas of the Keypad Flex have been freed as previously outlined ...

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