Tait TB8100, Service Manual

Page: 254 / 306

254 Power Management Unit Disassembly and Reassembly TB8100 Service Manual
© Tait Electronics Limited September 2006
14.6 Disconnecting the AC and DC Modules
Unless otherwise indicated, the circled numbers in the following
instructions refer to
Figure 14.2 on page 255 .
1. As shown in Figure 14.3 on page 256 , rotate the PMU so that the DC
module
f
is on top of the AC module
g
and unplug the 12-way rib-
bon cable
h
from the DC converter board.
2. Unfold the DC module from on top of the AC module, and place it
end-to-end with the AC module, as shown in
Figure 14.2 .
3. Unplug the 28VDC cable
b
from the DC converter board.
4. If fitted, unplug the 8-way cable
c
from the auxiliary power supply
board. Remove the cable from the retaining clips
d
.
Note
These connectors have locking tabs. You must disengage the
locking tab before you can remove the plug from the socket.
5. Slide the plastic grommet
e
out of the shield
f
. Unplug the mains
input connector
g
from the AC converter board and remove the
shield.
14.7 Reconnecting the AC and DC Modules
Unless otherwise indicated, the circled numbers in the following
instructions refer to
Figure 14.3 on page 256 .
1. If previously removed, reconnect the 28VDC cable
b
, 12-way rib-
bon cable
c
, and 8-way cable
d
(if fitted) to the AC converter board
and feed them through the plastic grommet
e
.
2. Reconnect the mains input connector to the AC converter board (as
shown in
Figure 14.2 on page 255 ), then insert the plastic grommet
holding the cables into the hole in the shield.
3. As shown in Figure 14.2 , place the AC and DC modules end-to-end
and reconnect the 28VDC cable
b
and 8-way cable
c
(if fitted).
Position the 12-way ribbon cable
h
between the two modules so that
it will still be accessible when the AC module is folded on top of the
DC module.
4. Fold the AC module
f
on top of the DC module
g
, ensuring that
the cables and shield
i
are correctly positioned. Make sure that none
of the cables is pinched between the modules and/or shield.
5. Reconnect the 12-way ribbon cable
h
to the DC converter board.