NorthStar HORIZON Manual page 23

from the top on the rear left of the transformer.
P37. Slip end A of wire #6 onto the third lug (#9) from the top
on the rear left of the transformer. Slip end B of wire #6
onto the upper left lug (#3) of the power switch.
P38. Slip end A of wire #8 onto the bottom lug (also labeled #9)
at the rear of the transformer.
P39. Attach end A of wire #1 to the hole in the chassis frame
just behind the 180.000uf capacitor using a 6-32x3/8"
machine screw and lock washer.
P40. There should now be exactly seven power supply wires with
unattached ends which will be routed to the motherboard
later. Carefully check all power supply wiring with the
power supply schematic drawing and Table 1 for correctness.
P41. Temporarily route the seven unattached wires to the rear of
the back panel and be sure that none of the ends of these
wires are touching each other or any other electrically
conductive material.
P42. Set the power switch to the off position (side toward fan
depressed). Next plug the line cord into the line filter
and an AC electrical outlet. Now turn on the power switch.
The fan should turn on and blow air toward the outside of
the chassis.
P43. The following DC voltages should now be read with a
voltmeter at the ends of the unattached wires:
A. +11 volts DC (±15%) between all four possible pairs of
one of the two red wires and one of the two black wires
from the 180.000uf capacitor. The red wire should be
positive.
B. +22 volts DC (±15%) between the orange wire and the
black wire from the 11,000uf capacitor. The orange
wire should be positive.
C.
-22
volts DC (±15%) between the yellow wire from the
8.900 capacitor and the black wire from the 11,000uf
capacitor. The yellow wire should be negative.
Turn off the power switch and unplug the line.cord from the
AC outlet. Discharge each of the three electrolytic
capacitors by placing a 100 ohm,
2
watt tesistor from the
motherboard parts across the two terminals for several
seconds. Be careful to hold the resistor by the body and
not to touch either of the leads. If any of the voltages
were not correct. locate the cause before proceeding.
23 North Star HORIZON Computer