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Power Supply Technical Information

Make sure

that

the

SPU

is

properly grounded.

It

requires a three-wire

power cahle

and

the

power supply

retaining/grounding

screw

must

be

installed. Also, make sure

that

the

power supply access

door

is

properly

installed.

Voltage

Tolerance

+5

V de

4.89

to

5.25 V de

+12

V

11.86

to

12.72 V de

-12

V

-11.86

to

-12.72

V de

Voltage Indicators

Voltage

Indication

-12

V de

(none)

+5

V

Self-test

LED

lit

at

turn-on.

+12

V de

Fan

Running

Voltage Reference Test Points

Figure 4-1. Power Supply Test Points

Troubleshooting 29

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