NorthStar HORIZON Manual page 41

Clil. Put 8-32 nuts and lock washers on the two chassis partition
piece front panel studs.
Cl:. Put the assembled motherboard in place on the left side of
the chassis. Wires #28 and #29 should be routed under the
motherboard and up though the notch at the left rear of the
motherboard. The disk drive power cable(s) should be routed
through the hole in the bottom center of the chassis
partition piece. Screw down the motherboard using ten 6-
32x3/8" machine screws and lock washers.
C12. Install two plastic card guides above each motherboard 100-
pin edge connector by snapping them into the approoriate
holes in the chassis side and chassis partition piece. Be
sure that the beveled ends of the guides are oriented uo.
C13. Put an S-100 PC card in each motherboard connector and
adjust the chassis partition oiece for a good fit. Now
tighten all chassis nuts and machine screws and then remove
the PC boards. Keep
i~
mind that if your HORIZON has a
black [ace plate then it may have to be adjusted later when
the disk drive is installed.
C14. Slip e'ld
i3
of wire #28 (blue) onto the motherboard guick-
connect lug labeled RESET/. Slip end
B
of wire #2
q
(black)
onto t'le lug labeled GND directly in front of the RESET/
lug.
C15. Attach the two adhesive backed cable-tie mounts to the back
panel and chassis partition piece as shown in figure lC.
orient them so that the cable ties can mount vertically.
C16. Feed the seven unattached power supply wire ends through the
large opening in the chassis partition piece.
C17. Now twist the seven wires into a neat bundle and route as
shown in figure lC. Tie the bundle with four plastic cable
tles as shown. Two of the cable ties should be threaded
through the cable tie mounting brackets. Leave the cable
ties j_ouse for now.
C18. Slip the seven wire ends onto the motherboard row of quick-
connect lugs as follows:
position Wire
4L
-16V
GND
+16V
GND
GND
+8V
+8V
yellow wire
black wire from 11,000uf capacitor
orange wire
either black wire from 180,OOOuf capacitor
other black wire from 180,OOOuf capacitor
either red wire
other red wire
North Star HORIZON Computer