Nortel Networks RTU-292 operation manual Preventive Maintenance, Repair or Replacement, Alignment

RTU-292 Operations Manual

6 Maintenance and Repair

6.1 GENERAL

Included in this section are the Test Procedures and performance evaluation criteria for the supplied equipment. Also provided is a Fault Analysis Table (Table 6.1) to aid in isolating a fault. Table 6.2 identifies replaceable parts.

6.2 PREVENTIVE MAINTENANCE

There are no preventive or periodic maintenance requirements for this equipment.

6.3 REPAIR OR REPLACEMENT

The repair or replacement of damaged and/or defective parts generally requires techniques that are standard in the industry. Carefully examine the equipment to determine the most correct and least time-consuming method required to make the repair.

6.3.1 GENERAL PRECAUTIONS AND NOTES

1.Disconnect power from the unit before attempting any repair or replacement of components.

2.Replace defective connectors only with identical items.

3.Carefully observe lead dress and component orientation when repairing circuits. Keep components leads as short as possible.

4.Reference to the component side of a printed circuit board denotes the side of the board on which the components are mounted. The solder or circuit side refers to the side opposite the components.

6.4 ALIGNMENT

No alignment is required or possible other than setting levels for the telephone line, receiver input and transmitter output which are done as a part of the normal equipment setup procedure.

6.5 PERFORMANCE TESTING

This section describes how to test and verify the basic performance of the RTU-292. Extensive test procedures pin-pointing the location of internal faults to the component level are beyond the scope of this manual.

6.5.1TEST EQUIPMENT REQUIRED

1 ea. Audio Signal Generator, 600 Ohm Output

1 ea. Noise Generator or Radio Receiver (See NOTE below)

1ea. Audio Voltmeter, Hi-Z Input (HP 400H or equivalent)

1 ea. Resistor, 560 Ohm to 680 Ohm, 1/4W min

6-19 JPS Communications, Inc.