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GE LBI-31482 Maintenance Manual
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GE LBI-31482 Maintenance Manual

GE LBI-31482 Maintenance Manual

33-50 mhz beacon monitor pager
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LBI-31482
Mobile Communications
MAINTENANCE MANUAL
FOR
GENERAL ELECTRIC
33-50 MHz
Beacon™ Monitor Pager
Printed in U.S.A.
Maintenance Manual

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Summary of Contents for GE LBI-31482

  • Page 1 LBI-31482 Mobile Communications MAINTENANCE MANUAL GENERAL ELECTRIC 33-50 MHz Beacon™ Monitor Pager Printed in U.S.A. Maintenance Manual...

  • Page 2: Typical Specifications

    GE Format ........

  • Page 3: Battery Information

    LBI-31482 LBI-31482 Replace batteries according to the (+) and (-) signs in DESCRIPTION WARNING the battery compartment. The General Electric Beacon™ Monitor Pager is a Do not attempt to charge mercury, alkaline or zinc- Slide battery cover back into place.
  • Page 4 LBI-31482 LBI-31482 tains both tone and voice circuits, and utilizes both discrete The output of Al is coupled through ceramic filter FL2 components and Thick Film Integrated Circuit Modules (IC’s). which provides the 455 kHz selectivity. The filter output is ap- plied to IF amplifier A2.

  • Page 5: Group Call

    LBI-31482 LBI-31482 The pager is also compatible with Quik-Call II two-tone The continuous tone output at A54-7 is shunted to ground This causes a high at pin 2 of decoders A52 and A53 which Tone B paging systems, and operates in both individual call and for 50 milliseconds at 100 millisecond intervals by Q59 to pro- disables the decoders to prevent falsing.
  • Page 6 The Pager can receive and decode two-tone sequential sig- EXAMPLE 1 - Code 098: For 1st For 2nd nals coded in the GE Type 99 format or the Motorola format. Tables 3 and 4 are used to determine the Quik-Call II Tone Tone tone frequencies.

  • Page 7: Alignment Procedures

    LBI-31482 ALIGNMENT PROCEDURE LBI-31482 EXAMPLE 1 - Group Call Code 07 (also code 27 and DISASSEMBLY ALIGNMENT PROCEDURES 37): (33-50 MHz) To gain access to the receiver board for servicing: The digit “0” in Table 5 shows that Tone B is in Tone EQUIPMENT REQUIRED: Group 2 along with 20 to 29 and 30 to 39.
  • Page 8 LBI-31482 LBI-31482 STEP PROCEDURE Peform steps 14 and 15 Only if deemed necessary. Discriminator: Apply a strong RF signal (approximately 1 mV Carrier with 1 kHz modulation at 3 kHz deviation) and adjust the discriminator coil (L9) for maximum audio output level measured across the 4 ohm speaker.

  • Page 9: Troubleshooting Procedure

    LBI-31482 TROUBLESHOOTING PROCEDURE LBI-31482 RECEIVER ER-145-A1, B1, C1, D1...
  • Page 10 LBI-31482 TROUBLESHOOTING PROCEDURE LBI-31482 RECEIVER ER-145-A1, B1, C1, D1...
  • Page 11 LBI-31482 TROUBLESHOOTING PROCEDURE LBI-31482 RECEIVER ER-145-A1, B1, C1, D1...

  • Page 12: Outline Diagram

    LBI-31482 OUTLINE DIAGRAM LBI-31482 SOLDER SIDE ISSUE 1...

  • Page 13: Component Side

    LBI-31482 OUTLINE DIAGRAM LBI-31482 COMPONENT SIDE...

  • Page 14: Schematic Diagram

    LBI-31482 SCHEMATIC DIAGRAM LBI-31482 RECEIVER ER-145-A1, B1, C1, D1...

  • Page 15: Parts List

    LBI-31482 PARTS LIST LBI-31482 PARTS LIST 33-50 MHz SYMBOL DESCRIPTION PART NO. SYMBOL DESCRIPTION PART NO. SYMBOL DESCRIPTION PART NO. BEACON MONITOR PAGER Ceramic Capacitor 4DT-2049E Diode 0500052324 Carbon Film Resistor 1/8 W, 2.2KΩ 1001078803 33 MHz - 37 MHz...
  • Page 16 LBI-31482 MECHANICAL PARTS BREAKDOWN AND PARTS LIST LBI-31482 SYMBOL NO. DESCRIPTION GE STOCK NUMBER FRONT CASE (BLACK) 2Mz-2111-1 FRONT CASE (RED) 2MZ-2111-2 PUSH BUTTON (1) 4MZ-1760-3 PUSH BUTTON (2) 4MZ-1761-3 SWITCH PARTS (1) 4MZ-2128-1 SWITCH PARTS (2) 4MZ-2129-1 SWITCH PLATE...

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