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Ericsson EDACS 900 Assembly

Master oscillator
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EDACS™ 900
MASTER OSCILLATOR ASSEMBLY
19D902127G1

TABLE OF CONTENTS

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Front Cover
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CIRCUIT ANALYSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
ADJUST MENT PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Master Oscillator Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Oscillator Board (Component Side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Oscillator Board (Solder Side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Oscillator Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Master Oscillator Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Test Switch Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
SPECIFICATIONS*
OUTPUT LEVEL
REFERENCE FREQUENCY
CURRENT DRAIN
VOLTAGE
TEMPERATURE RANGE
OUTPUT PORTS
*These specifications are intended primarily for use by service personnel. Refer to the appropriate Specification
Sheet for complete specifications.
LBI-38165B
Page
-6dBm minimum
17.6125 MHz +0.5 MHz
1.5 Amperes maximum
24 Volts DC +20%
o
o
-30
C to +60
C
20
Printed in U.S.A.

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Summary of Contents for Ericsson EDACS 900

  • Page 1: Table Of Contents

    LBI-38165B EDACS™ 900 MASTER OSCILLATOR ASSEMBLY 19D902127G1 TABLE OF CONTENTS Page SPECIFICATIONS ..........Front Cover DESCRIPTION .

  • Page 2: Description

    If U1 or U2 fails, Q11 or Q12 will turn on. This lights the should turn OFF. The EDACS 900 Master Oscillator is a self-contained, high U7C. U7D provides the voltage reference for the level monitor red ALARM indicator and turns on Q14 to provide a "low"...

  • Page 3: Parts List

    PARTS LIST LBI-38165...
  • Page 4 LBI-38165 PARTS LIST...

  • Page 5: Outline And Schematic Diagrams

    LBI-38165 OUTLINE AND SCHEMATIC DIAGRAMS EDACS 900 MASTER OSCILLATOR PANEL 19D902127G1 (19D902138, Sh. 1, Rev. 1)

  • Page 6: Outline Diagram

    LBI-38165 OUTLINE DIAGRAM COMPONENT SIDE (19D902100, Sh. 1, Rev. 1) (19A705492, Sh. 2, Rev. 2) (19A705492, Sh. 4, Rev. 1) EDACS 900 OSCILLATOR BOARD 19D902100G1...

  • Page 7: Oscillator Board (Solder Side)

    LBI-38165 SCHEMATIC DIAGRAM EDACS 900 OSCILLATOR BOARD 19D902100G1 (19D902109, Sh. 1, Rev. 2)

  • Page 8: Service Sheet

    SERVICE SHEET LBI-38165 SERVICE SHEET MASTER OSCILLATOR CABLE TEST SWITCH CABLE (19B801526 Rev. 1, and 19B801545 Rev. 1)

Table of Contents