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.
946261-9701
4P
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7.
To install a jumper, solder a short length of #26 AWG wire between P2-5 and P2-6.
8.
To reinstall the power supply, proceed as follows:
CAUTION
The male pins protruding from the lower center of the
motherboard are subject to bending if the mating connector on the
power supply is not properly aligned with these pins.
a.
Slip the power supply over the cable harness and into the side of the chassis. The
metal-shell jumper connector (for the standby power supply) should appear at the
bottom center of the power supply board.
b.
Align the power supply circuit boards on the two alignment pins and carefully
slide the board straight back so that the pins protruding from the motherboard
slip into the connector on the power supply circuit board. The view of these pins
is blocked by the power supply board.
c.
Reinstall the machine screws and standoffs that hold the power supply in place.
Do not omit the lockwashers, as both mechanical and electrical connections are
made
by
the machine screws and standoffs.
d.
Reconnect the power supply to the wiring harness by installing the color-coded
plastic connectors.
*X-acto is a registered trademark of X-acto Corporation
A.
13-SLOT CHASSIS.
B.
6-SLOT CHASSIS.
TILINE ACCESS
GRANTED (TLAG)
.AJMPER ETCHED
r----.v-.-P;;.;.I N .... S .... TO PI N 6
PINS 1
~''''.
• •
AND 2
.
~~~~6''p~N ~
.... __ ........ __
GND PLANE STRAPS
·NOTE
THESE ARE REAR VIEWS OF THE 990 MOTHERBOARD. I. E •• VIEWS FROM
THE POWER SUPPLY SIDE.
(A) 133946A
Figure 2-24. TILINE Access Granted Jumpers (Pl-5 to Pl-6)
on tbe Model 990 Backpanel
2-33
Digital Systems Division
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