Inter-Tel AXXESS - Page 268

Installation
INTER-TEL
®
AXXESS
®
MANUAL VERSION 11.0 – May 2008
Page
3-82
Power Supply Electrical Test
Power Supply Electrical Test
8.13 Perform the following electrical check on the power supply.
1. Ensure that the system AC power cable is not plugged in and the AC POWER switch
on the front of the power supply is OFF.
2. Plug the recommended surge/spike protector provided into a 105-125 VAC, 57-63 Hz,
15A, single-phase commercial power source.
NOTE: This MUST be an isolated, dedicated circuit. DO NOT use an extension cord
when installing the power supply. Also, DO NOT plug any other equipment into the
same AC outlet.
3.
Plug the system AC power cable into the surge/spike protector and turn ON the AC
POWER switch.
4. Observe the four LEDs on the front of the power supply unit. All four LEDs (+5V, -5V,
+24V1, and +24V2) should be lit. If any of the LEDs are blinking or are unlit, the
power supply is defective and the entire unit must be replaced.
NOTE: A blinking LED indicates that an
overly high voltage has been detected. A
lit LED merely indicates that there is
some voltage present (as shown in the
table at the right); it does not, however,
indicate whether the voltage level is
acceptable. To determine the exact volt-
age level present, perform the next step.
5. Referring to Figure 3-38 on page 3-78, measure the following system voltages on the
chassis backplane. A digital voltmeter of ±0.5% accuracy is required. Insert the “com-
mon” voltmeter probe into the ground point and insert the other probe into the desired
voltage test point (TP1 is ground for test points 2, 3, and 4; TP7 is ground for test points
5 and 6). The measurements should be within the limits listed in the following chart.
6. If the voltages are within the specified limits, turn OFF the AC POWER switch and pro-
ceed to the next section.
7. If voltage measurements are not within the specified limits, replace the defective power
supply unit.
Voltage Tolerance
-5VDC
+5VDC
+24VDC
SLPWR (+24VDC)
+
5%
+
5%
+5%
+
5%.
CAUTION
DO NOT attempt to adjust the power supply voltages. Damage caused by unautho-
rized voltage adjustment is not covered by the warranty.
Voltage LED Output
+5VDC
OFF
ON
BLINKING
1V
>1V & <6.5V
6.5V
-5VDC
OFF
ON
BLINKING
-1V
<-1V & >-6.5V
-6.5V
+24VDC
OFF
ON
BLINKING
1V
>1V & <29V
29V