User's Manual

M7X and M7R Page ix
Contents (continued)
Page
External Signal Connections 4-18
Audio – Narrow-band (A) Connector 4-19
Audio – Narrow-band (B) Connector 4-21
Audio – Wideband (A) Connector 4-22
Audio – Wideband (B) Connector 4-23
Facilities Connector 4-24
BIT Connector 4-25
Serial 1 Connector 4-26
Audio – Tape/External Speaker Connector 4-27
RCU Connector 4-28
Serial 2 Connector 4-29
E1 Connector 4-30
T1 Connector 4-31
Ethernet Connector 4-32
10 MHz Reference Frequency 4-33
Maintenance
Introduction 5-2
Scheduled Maintenance 5-3
Cleaning and Checking Security of Connectors 5-3
Checking the Internal Frequency Reference 5-4
Checking the ac and dc Change-Over 5-5
Unscheduled Maintenance 5-7
Tools and Test Equipment 5-7
Part Numbers 5-7
Built-in-Test (BIT) 5-9
Removing the Top or Bottom Cover 5-12
Replacing a Fan 5-13
Replacing the Control Head 5-15
Plug-In Modules 5-18
Modules B to F 5-18
Replacing the Custom Interface Module 5-20
Replacing the Guard Receiver Module 5-21
Replacing the Processor Module 5-22
Replacing the RF Control Module 5-24
Replacing the Interface Module 5-26
Replacing the RF PA 5-27
Removing the RF PA 5-28