Instruction/ maintenance manual of the product LBI-38378C GE
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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 .
Copyright© No vember,1989, General Electric Com pany T ABLE OF CO NTENTS Page SPECIFIC A TIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 OPT IONS AND A CCESSORIES . . . . . . . . . . . . . .
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.
OPTIONS AND A CCESSORIES Chargers A udio Accessories Radios, Antennas, Batteries Carrying Accessories LBI-38378 4.
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.
• 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.
Figure 1 - System Model Figure 2 - Scan Mode l Figure 3 - Select Model Figure 4 - Side View (All Models) LBI-38 378 7.
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 .
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.
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 In.
• 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.
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 S.
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.
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 ).
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.
BLOCK DIA GRAM Figur e 11 - Rea r Cover Assem bly Block Diag ram LBI-38378 16.
BLOCK DIA GRAM Figure 12 - Fro nt Cover Assembly (Earlier) And Contr ol Board Blo ck Diagram LBI-38 378 17.
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.
An important point after buying a device GE LBI-38378C (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought GE LBI-38378C yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data GE LBI-38378C - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, GE LBI-38378C you will learn all the available features of the product, as well as information on its operation. The information that you get GE LBI-38378C will certainly help you make a decision on the purchase.
If you already are a holder of GE LBI-38378C, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime GE LBI-38378C.
However, one of the most important roles played by the user manual is to help in solving problems with GE LBI-38378C. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device GE LBI-38378C along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
