LBI-39014B Maintenance Manual MDX UHF MOBILE RADIO TABLE OF CONTENTS RF BOARD . . . . . . . . . . . . . . . . . . . . . SYSTEM BOARD . . . . . . . . . . . . . . . . . AUDIO/LOGIC BOARD . . . . . . . . . . . . . . AUDIO AMPLIFIER BOARD . . . . . . . . . . . FRONT CAP ASSEMBLY . . . . . . . . . . . . . LBI-39017 LBI-38842 LBI-39016 LBI-38844 LBI-38850 LBI-38974 PA BOARD . . . . . . . . . . . . . . . . . . . . . . . LBI-39051 SERVICE SECTION . . . . . . . . . . . . . . . . . . LBI-39018 ERICSSONZ . . . .
LBI-39014B TABLE OF CONTENTS TABLE OF CONTENTS SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DESCRIPTION . . . . . . . . . . . RF BOARD . . . . . . . . . . Synthesizer . . . . . . Transmitter . . . . . . Receiver . . . . . . . POWER AMPLIFIER BOARD AUDIO/LOGIC BOARD . . . FRONT CAP ASSEMBLY . . SYSTEM BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2 . . . . . . . . . . . . . . .
LBI-39014B SPECIFICATIONS* Continued ENVIRONMENTAL TRANSMITTER Frequency Range Low Split Radio Mid Split Radio High Split Radio 403 to 440 MHz 440 to 470 MHz 470 to 512 MHz Output Power 40 Watts (Intermittent duty cycle; EIA 20%) Audio Sensitivity STANDARD METHODS PROCEDURES Mil-810C Mil-810D Mil-810E High Temperature 501.1/Proc 2 501.2/Proc 2 501.3/Proc 2 Low Temperature 502.1/Proc 2 502.2/Proc 2 502.3/Proc 2 110 mV RMS (typical) Low Pressure 500.1/Proc 1 500.2/Proc 1 500.
LBI-39014B sizer and sends and receives data to/from another microprocessor on the Display Board for the alphanumeric LED display. PC PROGRAMMED OPTIONS FRONT CAP ASSEMBLY The Front Cap Assembly contains the Audio Amplifier Board. This board provides audio compression for the received audio in the discriminator internal/external speaker audio paths. A 10-watt power amplifier is provided on the board to drive a 4-ohm external speaker or the 8-ohm internal speaker.
LBI-39014B CABLE OPTION PMCD7Z Table 2 - Digital Channel Guard Codes PRIMARY CODE 023 025 026 031 032 043 047 051 054 065 071 072 073 074 114 115 116 125 131 132 134 143 152 155 156 162 165 172 174 205 223 226 243 244 245 EQUIVALENT CODE 340 766 566 374 643 355 375 520 405 301 603 470 640 360 327 534 060 173 572 605 273 333 366 233 517 416 354 057 142 135 350 104 267 176 370 707 771 675 717 746 701 721 615 674 737 702 634 714 415 660 741 553 270 610 475 750 557 342 417 554 PRIMARY CODE 251 261 263 265
LBI-39014B Scan operation will be determined by the following conditions: 4. • PRIORITY 1, PRIORITY 2 AND NON-PRIORITY PROGRAMMED 5. The Priority 1, Priority 2 and up to 14 remaining channels will be scanned. Once a carrier is detected and if programmed, the correct Channel Guard is decoded, the LED display will indicate that channel. Sampling of the Priority 1 and Priority 2 channels continues while receiving a message.
LBI-39014B time is normally 2 seconds in length and PC programmable from 0.3 to 5 seconds on 0.1 seconds steps. If no other channel activity occurs during this time, scanning will then resume. The priority channels are still being sampled during the hang time. MONITOR (CLR) SWITCH OPERATION IN SCAN The CLR switch does not operate while scanning inactive channels. When a channel becomes active, the CLR switch operates only during the scan hang time after the channel activity disappears. 2.
LBI-39014B 6. Priority 1 Channel Programming: • Method 1 - Front programmable (default) P1 is added to the scan list using the front control panel. than or equal to four, then all non-priority channels will be scanned between each P1, P2 scan. c. As an added example, consider channels 1-8 to be scanned channels, with P1 being channel 1 and P2 being channel 8. The scanning order then would be: • Method 2 - Fixed P1 Option d. P1 channel is PC programmed into the radio personality.
LBI-39014B The Public Address microphone audio normally feeds an external speaker. An ON/OFF switch, which is mounted on or near the radio, allows selecting either the internal or external speaker for the receiver audio. The ON/OFF switch turns the receiver audio on or off to the external speaker. This switch still functions for the receiver audio with the PA option disabled. GE tone system or Quick-Call (In Motorola tone systems) allows communication between all radios in a system.
LBI-39014B In the Motorola tone format, the first tone may be one to three tones: A for individual call, B for Quick-Call and C for Group Call. The second or final tone is B in all cases. The Motorola tone format is illustrated as follows: INDIVIDUAL CALL FORMAT <-1.0 SEC MIN-> <----NONE----> <--3 SEC MIN--> TONE A GAP TONE B <-1.
LBI-39014B PARTS LIST MDX UHF MOBILE RADIO ASSEMBLY 19D904183P5 Issue 2 SYMBOL PART NO.
ASSEMBLY DIAGRAM LBI-39014B MDX UHF Mobile Radio (19D904183, Sh. 5, Rev.
LBI-39014B MDX UHF Mobile Radio (19D904183, Sh. 7, Rev.
INTERCONNECTION DIAGRAM LBI-39014B MDX UHF Mobile Radio (188D5198, Sh. 1, Rev.
LBI-39014B MDX UHF Mobile Radio (188D5198, Sh. 3, Rev.
INTERCONNECTION DIAGRAM LBI-39014B MDX UHF Mobile Radio (188D5198, Sh. 4, Rev.
