North Star DIMENSION Service Manual page 108

TROUBLESHOOTING
(cont.) Testing the Central Module Power Supply
Resistance
Use the following diagram to construct a resistance load
Load Box box for testing the power supply.
+5.OVDC Section
E7 o-----------I
> 0.5 ohms
< 10A, 50W
E9 0-----------I
J44-1 0-----------I
+12.OVDC Section > 3 ohms
> 4A, 48W •.o°
J45-2 o-----------I
J44-12 o-----------
-12.OVDC Section > 10 ohms
< 1.2A, 14.4W
J45-3 0-----------I
Note: If voltage readings indicate a potentiometer out of
adjustment, and if a resistance load box is not available,
install the power supply in the central module in the
normal manner (but do not install the power supply
shield). Make the necessary adjustments to the power
supply, and then install the power supply shield.
2-62 DIMENSION Service Manual