DC Power Distribution
Functional Tests
To functionally test the DC Power Distribution function, perform the following applicable tests
1. PS 1 Testing
A. A short or overload on any PS1 output causes that output to drop. Look for obvious problems like shorted or loose
connections on P1 and P2.
B. There are no designated test points for PS1. However, check inputs by probing P1 and outputs by probing P2.
C. If PS1 outputs continue to be incorrect, perform calibration (see Calibration chapter in this manual). If the calibration does
not correct the outputs problem, replace PS1
2. PS2 Testing
A. Check the following test points and indicator lights on PS2.
Test
Point
Indicator
Light
Voltage
TP2 DS3 -14VDC
TP3 DS2 +24VDC
TP4 DS4 +14VDC
TP5 DS1 +6VDC
TP6 DS5 -6VDC
B. A short or overload on any PS1 output causes that output to drop. Look for obvious problems like shorted or loose
connections on input and output connectors.
3. PS3 Testing
There are no accessible circuit breakers or fuses on the power supply itself. However check output connector P6 on
Power/Signal Interface PCB and the PS3 input connector for loose connections and probe for correct voltage of 115VAC.
11
Service
Periodic Maintenance
Contents
Schematics
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