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System Maintenance
S
1
ECTION
I
NTRODUCTION
S
2
ECTION
O
PERATIONAL
C
URRENT AND
V
C
OLTAGE
HECKS
System Hardware Manual
This chapter can be used by the technician to troubleshoot and diagnose
problems during and after system installation. The troubleshooting flow
charts and general test procedures aid the technician to identify possible
causes of the problem by defining the problem area.
Using
the
System
Programming and Speed Dial data can be stored on disk for safe keeping.
All completed System Programming should be downloaded to a disk for
backup. If system memory fails, the data on this disk can be uploaded to
restore memory.
The effectiveness of this maintenance section depends on the technician.
The technician should not make any assumptions. For example, a new
power supply used to replace another power supply cannot be assumed to
be working properly. The output of the power supply must be checked with
a volt meter.
The ESI(8)-U10 ETU allows the measurement of +5V and –24V. This ETU
can be used for the power output measurements. Refer to
Voltage
Measurement. Before the technician can troubleshoot, the correct
tools must be available. Some of these are listed below.
Digital or Analog Multimeter that can read DC and AC current and
voltage and DC Resistance.
Test Set (lineman) that has termination and monitor modes and
DTMF and DP dialing.
Chapter 10
Data
Upload/Download
feature,
all
System
Table 10-1
10 - 1
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