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LBI-38915B
Maintenance Manual
MDX
896-941 MHz MOBILE RADIO
TABLE OF CONTENTS
RF Board........................................................... LBI-38545
System Board.................................................... LBI-38842
Audio / Logic Board ......................................... LBI-38900
Audio Amplifier Board..................................... LBI-38844
Front Cap Assembly ......................................... LBI-38850
PA Board ........................................................... LBI-38547
Service Section ................................................. LBI-38912
Com-Net Ericsson Critical Radio Systems, Inc.
P.O. Box 2000
Lynchburg, Virginia 24501
1-800-528-7711 (Outside USA, 804-385-2400)
www.com-netericsson.com
Printed in U.S.A.
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Summary of Contents for Com-Net Ericsson MDX
- Page 1 Audio / Logic Board ......... LBI-38900 Audio Amplifier Board........LBI-38844 Front Cap Assembly ......... LBI-38850 PA Board ............LBI-38547 Service Section ..........LBI-38912 Com-Net Ericsson Critical Radio Systems, Inc. P.O. Box 2000 Lynchburg, Virginia 24501 1-800-528-7711 (Outside USA, 804-385-2400) www.com-netericsson.com...
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Page 2: Table Of Contents
10 Watts (External Speaker); 4 Watts (Internal Speaker) Audio Distortion 5% maximum at 1 kHz This manual is published by Com-Net Ericsson Critical Radio Systems, Inc., without any warranty. Improvements and changes to this manual necessitated by Hum and Noise -45dB (unsquelched) typographical errors, inaccuracies of current information, or improvements to programs and/or equipment, may be made by Com-Net Ericsson Critical Radio Systems, Inc., at any time and without notice. -
Page 3: Rf Board
The synthesizer circuit generates all transmit and receive The system board controls the main input power to the ra- The 900 MHz MDX Mobile Radio is a synthesized, Carrier Control Timer (CCT) RF frequencies. The synthesizer frequency is controlled by dio. -
Page 4: System Board
CODE CODE CODE CODE CODE are shown on Sheet 4 of the 900 MHz MDX Mobile Inter- The 900 MHz MDX Mobile Radio operates in EDACS connect Diagrams. (digital) mode providing opportunities to increase RF chan- 340 766 236 704 742... -
Page 5: Conventional Mode
935 to REPLACEMENT OF KEYCAPS 941 MHz to permit direct mobile-to-mobile communica- The 900 MHz MDX radio generates a set of unique tions. alert tones to indicate operating status. The following section... -
Page 6: Audio Amplifier Board
PARTS LIST LBI-38915B 900 MHz MDX/ MOBILE RADIO ASSEMBLY ISSUE 1 SYMBOL PART NO. DESCRIPTION APPLICATION ASSEMBLY 19D902944 ----------ASSEMBLIES---------- 19D902132G3 RF BOARD 19D901891G3 SYSTEM BOARD 19D904025G2 AUDIO AMPLIFIER BOARD 19D903963G1 AUDIO/LOGIC BOARD 19D902944G1 PA BOARD 19D904151G1 FRONT CAP ASSEMBLY ----------KITS---------- 344A4253G1 Hardware Kit (No. -
Page 7: Assembly Diagrams
LBI-38915B ASSEMBLY DIAGRAM (19D904183, Sh. 1, Rev. 19) - Page 8 ASSEMBLY DIAGRAM LBI-38915B (19D904183, Sh. 2, Rev. 19)
- Page 9 LBI-38915B ASSEMBLY DIAGRAM (19D904183, Sh. 5, Rev. 1)
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Page 10: Interconnect Diagrams
INTERCONNECT DIAGRAM LBI-38915B (19D904133, Sh. 1, Rev. 4) - Page 11 LBI-38915B INTERCONNECT DIAGRAM (19D904133, Sh. 2, Rev. 2)
- Page 12 INTERCONNECT DIAGRAM LBI-38915B (19D904133, Sh. 3, Rev. 4)