user manual

ND-20292
CHAPTER 5
APRIL.1990
All ports may be checked in software to ensure the
initialization process scanned all hardware correctly.
This can be done by displaying the contents of Memory
Block lE-5 on the system programming Terminal.
(Refer to Section 330 for explanation of Memory
Blocks.)
After all previous steps have been checked and any
problems corrected, the system programming can be
completed. Using Job Specification sheets (supplied in
Section 370) helps simplify the programming process.
CAUTION
Ensure the battery switch on the CPU-E ( ) ETU is
turned ON.
The next step for the technician is to perform a Second
Initialization (not a First Initialization). Performing
a First Initialization a second time will cause all
programming memory to be lost, whereas the Second
Initialization “cleans out” or “refreshes” the system
RAM without any loss of memory.
This completes the installation procedure for the
Electra Mark11 System. The technician should check
the operation of each Multiline Terminal to ensure the
system is working properly.
SECTION 540
TROUBLESHOOTING FLOW CHARTS
540.1 Problem Solving
To find the cause of a problem, first consider all the
symptoms carefully. As each aspect of the problem is
considered the technician is guided to a probable
solution. It is imperative the problem be defined as
accurately as possible, so the most efficient steps to a
solution can be taken. The troubleshooting flow
charts, in this section, will help define a problem and
direct the technician through the troubleshooting
steps.
1. System Down
Although this term is used to describe many
conditions, it will only be used in this section to
describe one of the following situations:
A. No access to intercom dial tone on any
Multiline Terminal or Single Line Telephone
installed.
B. No LED indications or no display indications
on any Multiline Terminal installed.
2. Partial Operation
This term will refer to any situation which cannot
be completely described under the conditions of a
SYSTEM DOWN. (Refer to the index table listing
these conditions.)
3. Reset Definition
In the troubleshooting flow charts, the technician
is at times directed to reset the station and/or ETU.
A. Terminal Reset - Is accomplished by
unplugging the station line cord from the
station and then plugging it back in.
B. ETU Reset -The ETUs are reset by turning the
ON/OFF switch on the ETU to the OFF
position and then turning it back ON. To give
capacitors in the ETU time to discharge, allow
some time before turning the switch back to
the ON position.
C. Remote Reset - For Terminal Reset use
Memory Block 3D4 and for ETU Reset use
Memory Block 3D3. Refer to Chapter 3 of this
manual.
SECTION 550
SELF DIAGNOSTICS AND
MAINTENANCE
NOTE: Some Self Diagnostics record the time and
date of a particular occurrence. Therefore, it
is suggested that the system time and date be
programmed prior to any customized
programming.
550.1
Self Diagnostic Function
The Electra Mark11 CPU automatically checks for
hardware and software errors. The detected errors are
stored in the systems memory. This provides the
installer or troubleshooter with the ability to retrieve
error information to help diagnose and correct
problems. This is accomplished using a local
programming Multiline Telephone or can be
accomplished remotely with a computer and modem
via the RAA-E.
The following self check functions are supported:
1. System CPU initialize (Reset) History (Memory
Block 5Bl) - The history (time and type) of resets
(errors) generated in the system can be retrieved
from the system programming mode. The last ten
resets are stored. (Initial power up is always the
first reset stored.1
C. No system tones are generated.
500-3