North Star RAM-16-A Manual page 13

Assembly Information section for capacitor installation
procedures.
Capacitor
(u
CI
C",Y'
C2
(~y
C3
(.",) C4
(,~.{
C5
(0;;,,1
C6
(."."') CII
Value
2.2uF
2.2uF
6.BuF
6.BuF
6. BuF
6.BuF
6.BuF
Location
0A
0A
0B
0B
0D
0D
BA
R13. Insert and solder the following capacitors:
Capacitor
Value Location Type
(t.}""'C7 .0047uF lA dipped
( Id)'
CB 100pF lC dipped
2A dipped
2E ceramic
12E ceramic
(t,.r'
l
C9
.0047uF
('1
CI~
47pF
( ) C13 47pF
mylar
mica
mylar
disk
disk
12E ceramic disk
(~
Cl4 47pF
~nsert
and solder the sixty .047uF ceramic disk capacitors
at the 60 locations marked on the layout legend with
asterisks.
,R15. Save the remaining 33pF capacitor (CI0) for special DMA
applications. See the Special DMA Applications section for
details.
Be sure the computer power is off and tben
16-A board into the computer motherboard.
power and check for the following voltages
indicated pair of capacitor leads:
Capacitor
( ) C5
( ) C]
Voltage
+5V ±s%
+$W±3ti%
insert the RAM-
Now turn on the
across each
Turn off the computer power. If any of the voltages are not
correct, then locate and correct the problem before
proceeding.
R17. Install the delay line module in the socket at location 5A.
, Qrient the delay line so that pin 1 (indicated by a dot or
/"IN") is inserted in pin I of the socket.
~B.
Install the 28 TTL integrated circuits (all but the memory
IC·s). Be careful to orient each IC so that pin I is
North Star 16K RAM Board 12