NorthStar HORIZON Manual page 30

M12. Insert
~nd
solder the following thirteen
.~47uf
ceramic disk
capacitcrs. Either orientation of the capacitor leads is
acceptatle.
Ca,acitor
Cll
Cl2
C13
C14
CIS
C16
C17
C18
C19
C20
C21
C22
C48
Location
3A
SA
10A
3B
4B
9B
10
5C
100
5D
70
100
7A
Similarly insert and solder the following four 470pf ceramic
disc ca,acitors:
Caj:acitor
C27
C28
C29
C30
Location
38
38
3B
3B
M13. AssemblE the +5 volt regulator (7805 or 340T-5) to the
inside cf the 6030B heat sink so that the following sequence
results from outside to inside: 6-32x3/8" machine screw
head, hEat sink, regulator, lock washer, and nut. The
regulatcr leads should point in the same direction as the
heat sirk mounting posts. Next, install the regulator heat
sink ascembly, oriented as shown on the layout legend, into
the locction for the rear-most 7805 regulator at the left
rear of the motherboard. Insert the regulator leads into
the motrerboard and then insert the heat sink mounting
posts, Now solder the regulator leads
M14. Insert end solder the 78L12 and 79L12 regulators in the
positiors indicated on the layout legend near location lB.
Be sure that .the flat sides of the regulators are oriented
as indicated on the layout legend.
MIS. Install and solder the 25-pin serial I/O interface connector
in the ]:,osition labeled LEFT SERIAL at the rear of the
motherbcard. The following order should result from top to
bottom: Two 4-40x3/8" machine screw heads, connector,
motherbe,ard, lock washers, and nuts.
North Star HORIZON Computer
30