User's Manual

Table Of Contents

EX7100 Technical Manual - Module Descriptions

4) Press the ‘Escape’ key to back out of the

menu system.

The power supply can be considered to be operating satisfactorily if the supply rails are

within the ranges specified within Table 7.1 below.

Front Panel Measurement Typical Reading Range

Input DC Voltage 10.8 to 30V (LV variant), 30 to 60V (HV variant)

+24 Volt Rail 22.8 to 25.2V

+15 Volt Rail 14 to 16V

-15 Volt Rail -14 to -16V

+5 Volt Rail 4.8 to 5.2V

-5 Volt Rail -4.7 to -5.3V

Input Current Up to: 9A (LV variant), 3A (HV variant)

Table 7.1: Typical Power Supply Measurement Ranges

If the display is not operating or the power supply rails are not within the expected

voltage, follow the steps outlined in Figure 7.5 overleaf.

Accessing the Power Supply

To gain service access to the power supply module, remove the bottom cover of the

terminal as described in Section 6.1.

Before commencing cover removal, switch the rear panel power

switch off

AND isolate the fused supply to the unit. Check that

electrolytic capacitors are discharged before proceeding.

Diagnosis

With the unit de-powered, check the power supply visually for signs of damage such as

burnt tracks, or components. If no damage is apparent, apply power to the terminal and

check the voltages in Table 7.2.

Note: Measurements should be made with an isolated digital multi-meter to prevent the

possibility of injury to servicing personnel or damage to the terminal.