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GE LBI-38378C manual

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Table of contents for the manual

  • Page 1

    LBI-38378 C Mobile Comm unications M-P A  VHF POR T ABLE FM RADIO T ABLE OF CONTE NTS REAR CO VER ASSEMBL Y . . . . . . . . . . . . LBI-38597 FR ONT CO VER ASSEMBL Y ( EARLIER) AND CONTR OL BO AR D . . . . . . . . . . . . . LBI-38384 FR ONT CO VER ASSEMBL Y ( LA T ER) LESS CONTR OL BO ARD . . . . . . . . . . . . . LBI-388 34 CONTR OL BO ARD (LA [...]

  • Page 2

    Copyright© No vember,1989, General Electric Com pany T ABLE OF CO NTENTS Page SPECIFIC A TIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 OPT IONS AND A CCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 INTR ODUCTION . . . . . . . . . . . . . [...]

  • Page 3

    SPECIFICA TIONS* GENERAL Frequency Bands 136 - 150. 8 M Hz (FCC T ype Acce ptanc e Number) 146 - 162 MHz (AXA TR-182-B5) 157 - 174 M Hz (AXA TR- 182-C 5 ) DOC Number TR-182- D2 Frequency Stability 5.0 ppm Channel Capacity Select Model 16 Scan Mode l 192 System Mode l 192 Maximum Freque ncy Sep aration full bandsplit Channe l Spacing 30 kHz Oper ati[...]

  • Page 4

    OPTIONS AND A CCESSORIES Chargers A udio Accessories Radios, Antennas, Batteries Carrying Accessories LBI-38378 4[...]

  • Page 5

    INTR ODUCTION The M-P A radi o is a hig h quality microprocessor con- trolled synthesized portable FM radio . M-P A ope rati on is high lighted by the radio’ s prog ramming versatility . This al- lows t ailored operation of the port able radio to meet the needs of the radio system and the i nd i vidual us e rs. Thre e ( 3) different M-P A radio m[...]

  • Page 6

    • Programmable Multi-T one Channel Guard (CTCSS) - Channel Guard tone frequenc ies withi n the rang e of 67 Hz to 21 0.7 Hz, including all of the standard EIA fre q uenci es, ca n be progra mmed fo r enc od ed /decoded op eration. • Programmab le Multi-Code Digital Channe l Guard - Simi lar capability as with tone Channel Guard is pro vided. ?[...]

  • Page 7

    Figure 1 - System Model Figure 2 - Scan Mode l Figure 3 - Select Model Figure 4 - Side View (All Models) LBI-38 378 7[...]

  • Page 8

    REAR CO VER ASSEMBL Y The Rear Cover Assembl y houses the R F Board in the die-cast al uminum case. The complete assemb ly consists of the VHF RF Board, aluminum case, top antenna jack, side (UDC) antenna jac k an d various hardwa re . The RF B oard’ s circuitry includes the transmitter , re- ceive r and the frequency synthesizer . This FM circui[...]

  • Page 9

    pack in need of a char ge will cause the low battery "B A T" status flag on the radio to turn on. This flag w ill tur n on when the battery pack’ s volt age drops be low appr oxima tely 6.8 V olts. The low batt ery alert tone will also be heard wh en the ba t tery pack needs ch arging. RECHARGEABLE B A TTER Y P A CK DISPOSAL The product[...]

  • Page 10

    T ABLE 2 - UDC PIN FUNCTIONS PIN NAME INPUT OR OUTPUT USE 1 GR OUND ------- Case Ground 3 UDC RX A UDIO Output T e st Point For Spea ker Audio 4 SWB A TT Output Switched Accesso ry Powe r 5 EXT PTT Input External M icropho ne PTT Inpu t 6 TX D A T A Input For Prog rammi ng 7 RX D A T A Output For Programming 8S P A R E 9 UDC V OL T ------ - Option/[...]

  • Page 11

    • T wo in dividual T y pe 99 T one Grou p Sets • Control Knob selects Channels, Modes or Ch annel Guard* • Menu Selections* • Home Mode or Home Channel (dependi ng on Control Knob pr ogramming ) or Disabled* • Scan Enable d or Disa bled* • Scan with Channe l Guard En ab led or Disab led * • Scan Acro ss Modes E nabled or Disabled* •[...]

  • Page 12

    P ANC1B Antenna , 136 - 151 MHz, Helica l (19B23 4804P1) P ANC1C Antenna , 146 - 162 MHz, Helica l (19B23 4804P2) P ANC1D Antenna , 15 7 - 17 4 MHz, Helica l (19B23 4804P3) P AHC1C Belt Clip P AHC1D Swivel Mount with Belt Loop P AHC1E Case, Leather , with Belt Loop (Short C ase) P AHC1F Case, Leather , with Belt Loop (T all Case) P AHC1G Case, Leat[...]

  • Page 13

    DISASSEMBL Y / REASSEMBL Y In the event internal service is required, disassemble the radio in accordance with the follo wing outlined steps. See Figures 6 - 10. Reassembl e the unit by following the steps in re verse order . O bserve scr ew le n gths and do not over tighten the screws when reassemb ling th e unit. T orque specif ications are liste[...]

  • Page 14

    RF Board Access Holes are located in t he RF Board shield for alignment of the Reference Oscillator ( U3 ), Modulation Balance pot ( R18 ), VCO Mod ulation pot ( R19 ), 2nd Local Oscillator Adjustment ( T1 ), an d the Qu adrature D etector Adjustment ( T2 ). T o align th ese items, shie ld remo val is not nece ssar y . If remov al of the RF Board f[...]

  • Page 15

    TION: In stallat ion of sc re ws that are longer than the origi- nals may damage the LCD Board, flex cir cuits or the threads. T o remove the Control Board, remov e the T orx scre w ( E ) in the lower left-hand corner that supplies battery po wer to the board. An earli er Front Cover Assembly has an addi- tional scre w located just below connectors[...]

  • Page 16

    BLOCK DIA GRAM Figur e 11 - Rea r Cover Assem bly Block Diag ram LBI-38378 16[...]

  • Page 17

    BLOCK DIA GRAM Figure 12 - Fro nt Cover Assembly (Earlier) And Contr ol Board Blo ck Diagram LBI-38 378 17[...]

  • Page 18

    Later Front Cove r Assembly Keypad Flex Removal T o remove the Ke ypad Fl ex, f irst remove the UDC Flex/UD C/M onito r Button/PTT Switch assembly as pre- viou sly stat ed. Next re move the screw securing the emer - genc y switc h supp ort ( G ) then remove the support. Remo ve the knobs using the he x dri ver . W ith a span ner wrenc h, r e- move [...]