Disk Controller Board Assembly - NorthStar HORIZON Manual

DISK CONTROLLER BOARD ASSEMBLY
If your HORIZON configuration does not include at least one disk
drive, then skip this section.
Fl. Insert and solder the 5 twenty-pin IC sockets at locations
7D, 8D, 9D, 10D, and lID, following the procedure given in
the Assembly Information section. Orient them as shown on
the layout legend with pin 1 toward the bottom of the board.
F2.
F3.
F4.
Similarly, install the 19 sixteen-pin IC sockets.
A
sixteen-pin socket is used at location lAo
The two 8-pin
Ie's will be inserted into this socket.
Similarly, install the 22 fourteen-pin IC sockets.
Install and solder the 31 resistors in the locations
indicated by the layout legend. The hole spacing for all
the resistors is. . 5 inches.
Resistor Location Value Size Color-code
( )
Rl
lA 3. 3K 1/4W org-org-red
(
)
R2 IB
3. 3
1/4W
org-org-gld
( )
R3 IB
5.6K 1/4W grn-blu-red
( )
R4
2A 17K 1/4W red-vio-org
( )
R5 2A 27K 1/4W red-vio-org
( )
R6 2B 5.6K 1/4W
grn-blu-red
( )
R7 2B 6.19K 1% 1/4W blu-brn-wht-brn
( )
R8 2B 2.2K 1/4W red-red-red
( )
R9 3A
470
1/4W
yel-vio-brn
( )
R10 3A 470 1/4W
yel-vio-brn
( )
Rll
3A 5.6K
1/4W
grn-blu-red
( )
R12
3A 3.6K 1/4W org-blu-red
( )
R13 3C
6.8K 1/4W blu-gry-red
( )
R14 3C 13K 1/4W
brn-org-org
( )
R15 3C 17K 1/4W
red-vio-org
( )
R16
3C 6.8K 1/4W
blu-gry-red
( )
R17 4B
2.2K
1/4W
red-red-red
( )
R18
14A 680 1/4W blu-gry-brn
( )
R19
4A
9.1K
1/4W
wht-brn-red
( )
R20 SA 10K 1/4W brn-blk-org
( )
R21 5D
470 1/4W yel-vio-brn
( )
R22
6A 15K 1/4W
brn-grn-org
( )
R23 6D
2.2K 1/4W
red-red-red
( )
R24
6D 330 1/4W
org-org-brn
( )
R25
14A 680 1/4W
blu~gry-brn
( )
R26
lIB 470 1/4W yel-vio-brn
( )
R27 12A
150 1/4W brn-grn-brn
( )
R28
12A
150 1/4W brn-grn-brn
( )
R29 12A 150 1/4W
brn-grn-brn
( )
R30
14A 150 1/4W brn-grn-brn
( )
R31 14A 150 1/4W
brn-grn-brn
North Star HORIZON Computer
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