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1/4" of insulation from each conductor at both ends.
Crimp
and solde·r eaeh of the four power plug pins to the
conductors at one end.
Finally, insert the power plug pins
into the power plug using the following color code:
+5 red,
+12 green, ground black and white.
Consult the OEM Manual
(sections 4.2 and 5.2) for the correct connection of power
to the power pins.
P5.
solder the four wires coming from the power plug assembly to
the appropriately labeled holes in the lower righthand
corner of the. PC board.
The wires should be inserted into
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NOTE: If the MDS-PS power supply is being used, then skip
the remaining steps of these instructions and go on to the
MDS-PS assembly instructions.
P6.
Insert and solder the two .947uf ceramic disc capacitors (Cl
and C2) in the locations indicated by the silk screen
legend.
P7.
The four wires in the 5-foot power cable should be soldered
to the four holes in the PC board labeled 8v, 8v, 9v, and
l8v using the following color code:
8v black, Bv white, 9v
red, l8v green.
The wires should be inserted into the PC
board from the component side.
pa.
Connect the other end of the power cable to the appropriate
power points-of the unregulated power supply.
For example,
the cable can be connected to the power pins at an unused
position on the S-100 bus mother board.
Consult the
computer reference manual for details.
If the disk drive is
to be mounted inside a cabinet (MDS-CAB) then the power
cable should be passed through a hole in the back of the
cabinet and clamped with the provided strain relief bushing
before connection to the power source.
P9.
Check that the regulators are providing +5 and +12 volts at
the proper power plug pins before plugging into the drive.
_--!,ll.
Mount· the PC board to the back of the disk drive as follows.
Carefully remove the two machine screws that mount the small
PC board to the back of the disk drive.
Save the quick-
connect lug and lock washer from the righthand (as seen from
the back of the disk drive) mounting screw.
Use the two
longer machine screws and spacers so that the following
sequence results from back to front:
machine screw head,
(quick-connect lug and lock washer on righthand screw only),
power PC board, longer spacer, small PC board, sRorter
spacer, and disk drive.
The power PC board should be
mounted with the solder side toward the drive.
The power board is now ready to use.
North star MICRO-DISK System
20
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