User Manual

AS4000 Central Terminal

Installation and Commissioning

DLP 007

605-0000-452

Issue 1.3dr Date 7/02/00

Page 4 of 4

4. PSU Voltage Modem Shelves: (Test 2a)

Using the DMM, measure and record the DC voltage at the front panel test points on

each of the PSUs on the Modem Shelf.

Card Fail

PSU OK

I/P A Fail

I/P B Fail

O/P Overload

O/P Underload

2.1V

3.3V

Figure 29. Modem Shelf PSU

Ensure that the voltages measured are within the limit shown in Table 4. Record the

results in test form.

Voltage Upper Limit Lower Limit

5V DC 5.25V 4.75V

3.3V DC 3.0V 3.3V

2.1V DC 2.1V 2V

Table 4

STOP. THIS PROCEDURE HAS BEEN COMPLETED.