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Tyco Electronics MACOM 19D902780G3 Maintenance Manual

Uhf transmitter synthesizer module g6-g7
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ADDENDUM NUMBER 2 TO MAINTENANCE MANUAL
LBI-38671N
Refer to ECO#20034647
GENERAL
This addendum updates information about the Printed Wire Board (PWB) for UHF Transmitter Synthesizer
Module Boards 19D902780G1, G3, G6-G8, 19D902779G1, G3, G6-G8, and 19D903483G1, G3, G6-G8,
G300.
PRODUCTION CHANGES
On page 6 of the manual, update the production changes to include the following information:
Rev. 4A – Transmitter Synthesizer Board 19D902780G1, G3, G6-G8
Rev. 9A – Transmitter Synthesizer Board 19D902779G1
Rev. AA – Transmitter Synthesizer Board 19D902779G3
Rev. 8A – Transmitter Synthesizer Board 19D902779G6-G8
Rev. 2A – Transmitter Synthesizer Board 19D903483G1, G3, G6-G8, G300
Change Inductor L2 from 19A705470P24, Inductor, Fixed, SMT, 0.82uH, 5%, 450 MA, to 19A705470P28,
Inductor, Fixed, SMT, 1.8uH, 5%, 450 MA.

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Summary of Contents for Tyco Electronics MACOM 19D902780G3

  • Page 1 ADDENDUM NUMBER 2 TO MAINTENANCE MANUAL LBI-38671N Refer to ECO#20034647 GENERAL This addendum updates information about the Printed Wire Board (PWB) for UHF Transmitter Synthesizer Module Boards 19D902780G1, G3, G6-G8, 19D902779G1, G3, G6-G8, and 19D903483G1, G3, G6-G8, G300. PRODUCTION CHANGES On page 6 of the manual, update the production changes to include the following information: Rev.
  • Page 2 M/A-COM Wireless Systems 221 Jefferson Ridge Parkway Lynchburg, Virginia 24501 (Outside USA, 434-385-2400) Toll Free 800-528-7711 www.macom-wireless.com Printed in U.S.A.
  • Page 3 ADDENDUM NUMBER 1 TO MAINTENANCE MANUAL LBI-38671N GENERAL This addendum updates information about the Printed Wire Board (PWB) for UHF Transmitter Synthesizer Module Boards 19D902779G3, G6-G10 in Maintenance Manual LBI-38671. CHANGES On page 7 of the manual, update the production changes to include the following information: Rev.
  • Page 4 M/A-COM Wireless Systems 221 Jefferson Ridge Parkway Lynchburg, Virginia 24501 (Outside USA, 434-385-2400) Toll Free 800-528-7711 www.macom-wireless.com Printed in U.S.A.

  • Page 5: Table Of Contents

    Maintenance Manual LBI-38671N UHF TRANSMITTER SYNTHESIZER MODULE 19D902780G3, G6 - G10 ASSEMBLY DIAGRAM TABLE OF CONTENTS Page DESCRIPTION ..........GENERAL SPECIFICATIONS .

  • Page 6: Description

    LBI-38671N Transistors Q101 and Q102 and associated circuitry form the TABLE 1: GENERAL SPECIFICATIONS DESCRIPTION oscillator enable switch. This switch allows the station con- trol circuitry to turn the VCO ON or OFF via the ANT_REL ITEM SPECIFICATION The principle function of the Transmitter Synthesizer Mod- line.

  • Page 7: Prescaler And Synthesizer

    LBI-38671N The output of the second buffer (U501B) is applied to a loop PRESCALER AND SYNTHESIZER filter consisting of R506, R507, R508, C505 and C506. This filter controls the bandwidth and stability of the synthesizer Integrated circuit U402 is the heart of the synthesizer. It contains the necessary frequency dividers and control cir- loop.

  • Page 8: Logic Circuits

    LBI-38671N LOGIC CIRCUITS TEST PROCEDURE ALIGNMENT PROCEDURE SERVICE NOTES Logic circuitry (other than that inside the synthesizer IC - (Steps 5, 6, and 7 can be done using a modulation analyzer 1. Apply +13.8 Vdc and -12 Vdc. Verify the current The following service information applies when or UHF receiver with 750 µs de-emphasis switchable in or U402) consists of the following:...

  • Page 9: Parts List

    LBI-38671N PARTS LIST SYMBOL PART NO. DESCRIPTION UHF TRANSMITTER SYNTHESIZER MODULE TROUBLESHOOTING GUIDE 19D902780G3, G6 - G10 C201 19A702061P61 Ceramic: 100 pF + or - 5%, 50 VDCW, temp coef 0 + or - 30 PPM. ISSUE 12 C202 19A702061P99 Ceramic: 1000 pF + or -5%, 50 VDCW, temp coef 0 + or -30 PPM/°C.
  • Page 10 LBI-38671N PARTS LIST SYMBOL PART NO. DESCRIPTION SYMBOL PART NO. DESCRIPTION SYMBOL PART NO. DESCRIPTION SYMBOL PART NO. DESCRIPTION R203 19B800607P150 Metal film: 15 ohms + or -5%, 1/8 w. C411 19A705205P6 Tantalum: 10 uF, 16 VDCW; sim to Sprague 293D. - - - - - - - - - - - JACKS - - - - - - - - - - - R412 19B800607P823...

  • Page 11: Production Changes

    PRODUCTION CHANGES LBI-38671N To make trimmer C10 adjustable to the required voltage level, 2.5 ± SYMBOL PART NO. DESCRIPTION 0.05 V. Changed capacitor C4 (19A702236P8) of Schematic Diagram, U303 19A704971P7 Voltage Regulator, Negative: sim to Motorola Sheet 1 "Table of Values" under column G3 From 1.5pF to 2.2 pF MC79L05ACD.

  • Page 12: Ic Data

    IC DATA LBI-38671N U201 and U203 U301 U303 U202 19A705927P11 19A704971P9 19A704971P7 344A3907P1 Silicon Bipolar MMIC +5V Regulator -5V regulator Silicon Bipolar MMIC U501 U302 & U601 344A3070P1 19A116297P7 Operational Amplifier Dual Wide Band Op-Amp...
  • Page 13 LBI-38671N IC DATA U401 U701 & U705 19A149944P201 19A703483P302 Dual Modulus Prescaler Quad 2-Input NAND Gate U402 19B800902P7 Synthesizer U702 19A703471P120 Address Decoder U502 19A702705P4 Quad Analog Switch...

  • Page 14: Outline Diagram

    OUTLINE DIAGRAM LBI-38671N SOLDER SIDE COMPONENT SIDE UHF TRANSMITTER SYNTHESIZER BOARD 19D902779G3, G6 - G10 (19D902779, Sh. 2, Rev. 15)

  • Page 15: Schematic Diagram

    LBI-38671N SCHEMATIC DIAGRAM UHF TRANSMITTER SYNTHESIZER 19D902780G3, G6 - G10 (19D903363, Sh. 1, Rev. 22)
  • Page 16 SCHEMATIC DIAGRAM LBI-38671N UHF TRANSMITTER SYNTHESIZER 19D902780G3, G6 - G10 (19D903363, Sh. 2, Rev. 22)
  • Page 17 LBI-38671N SCHEMATIC DIAGRAM UHF TRANSMITTER SYNTHESIZER 19D902780G3, G6 - G10 (19D903363, Sh. 3, Rev. 22)
  • Page 18 SCHEMATIC DIAGRAM LBI-38671N UHF TRANSMITTER SYNTHESIZER 19D902780G3, G6 - G10 (19D903363, Sh. 4, Rev. 22)

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