Hardware manual

System Hardware Manual 10 - 1

System Maintenance Chapter 10

SECTION 1

NTRODUCTION The technician can use this chapter 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 Data Upload/Download feature, all System

Programming and Speed Dial data can be stored on disk for safe keeping.

After all System Programming is completed, it should be downloaded to a

disk for backup. If system memory fails, this data on the disk can be

uploaded and the memory restored.

SECTION 2

PERATIONAL

URRENT AND

OLTAGE CHECKS

The effectiveness of this maintenance section depends on the technician.

Due to external factors, the technician should not make any assumptions.

For example, don’t assume that a new power supply used to replace

another power supply is working properly. Check the output of the power

supply with a volt meter.

The ESI(8)-U10 ETU allows the measurement of +5V and –24V. This ETU

can be used in the expansion KSU for the power output measurements.

Refer to Table 10-1 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.