ND-20292
APRIL, 1990
CHAPTER 5 MAINTENANCE
TABLE OF CONTENTS SECTION 520
SECTION DESCRIPTION PAGE OPERATIONAL CURRENT AND
VOLTAGE CHECKS
510
520
530
GENERAL
500-l
OPERATIONAL CURRENT
AND VOLTAGE CHECKS
500-l
OPERATIONAL TEST
PROCEDURES
530.1 General 500-l
530.2 Before Initialization 500-2
530.3 System Initialization 500-2
530.4 After Initialization 500-2
540 TROUBLESHOOTING FLOW
CHARTS
540.1 Problem Solving 500-3
550 SELF DIAGNOSTICS AND
MAINTENANCE
550.1 Self Diagnostics 500-3
550.2 Maintenance 500-4
SECTION 510
GENERAL
This Chapter is to be used as a guide for diagnoses and
troubleshooting problems during and after system
installation. The troubleshooting flow charts, general
test procedures and Maintenance Memory Blocks
(See Chapter 3 of this manual) lE5, 3B4, 3D3, 3D4,
5Bl to 5B6, 5Cl and 5C2 will help the technician to
identify the cause of a problem by defining the problem
area and isolating the valid symptoms.
In addition, with the System Data Up/Down Load
feature, all system programming, speed dial data, and
Forced Account Code information can be stored on
diskette. (Refer to Chapter 9 of this Manual.) After all
system programming has been completed, it should be
down loaded onto diskettes for a backup copy of the
system programming. In case of system memory
failure, the system could be up loaded with the backup
diskettes.
The effectiveness of this portion of the maintenance
section depends upon the technician’s ability to answer
correctly all questions posed as accurately as possible.
Due to external factors, it is important that no answer
be assumed. For example, it cannot be assumed that a
power supply is working properly because it has been
replaced with another power supply. It is necessary to
test the output of the power supply with a volt meter
(See Table 520-l for specifications). Before a
technician can attempt any troubleshooting, the
correct tools should be available.
1. Digital or Analog Multimeter, capable of reading:
A. DC current and voltage
B. AC current and voltage
C. DC Resistance
2. Test Set, linemen, being capable of:
A. Termination and Monitor Modes
B. DTMF and Dial Pulse dialing
3. Hand tools:
A. Set of screwdrivers (common and Phillips
head blades)
B. Set of pliers, long nose and diagonals
C. Punch down tool
4. The complete Electra Mark11 Installation Service
Manual with all the latest up to date information,
as well as the completed job specifications.
SECTION 530
OPERATIONAL TEST PROCEDURES
530.1 When the Electra Mark11 System is first
powered up it runs through an initialization process.
During this process the CPU-E ( ) ETU, in module
1,
scans each of the thirty two interface slots to determine
the hardware configuration used. This information is
stored in the Resident System Program memory with
the system default values. Section 530 provides test
procedures to be used before, during, and after this
initialization process.
500-l