b. Replacement of Chassis Bottom Plate
g. Removal of Fuseholder XF7901 (fig.
14) .
-
(1) Remove the chassis bottom plate
(1) Place the chassis bottom plate in
(a above).
position so that the two studs on
(2) Remove two wires from the fuse-
switch S7902 extend through the
holes prodded and secure them:
holder.
(3) Remove the nut and lookwasher
use the two nuts (a(3) above).
from the front panel rear side of
(2) Replace and tighten the two 6-32
-
t h e fuseholder, and remove the
screws (a(2) above).
fuseholder from the front side of
(3) Replace and tighten the four 4-40
the front panel.
screws (a(l) above).
h. Replacement of Fuseholder XF7901
c. Removal of Connector J7902 (fig. 12
and 14) .
(1) Insert the fuseholder through the
(1) Remove the chassis bottom plate
front side of the front panel and
(a above).
secure it; use the nut and lock-
(2) Remove the red lead from J7902
at the upper contact of switch
washer (g(3) above).
S7901, and the black lead from
(2) Reconnect the two wires (g(2)
J7902 at the ground lug at connector
above).
S7907.
(3) Replace the chassis bottom plate
(b above).
(3) Remove the nut on the front panel
side of connector J7902 and re-
move connector J7902 from the
(1) Remove the chassis bottom plate
(a above).
rear of the panel.
d. Replacement of Connector J7902 (fig.
(2) Remove one wire from the test
12 and 14).
jack.
(3) Remove the nut from the front panel
(1) Insert the connector from the rear
rear side of the test jack, and re-
of the front panel and secure it in
move the test jack from the front
place; use the nut (c(3) above).
side of the front panel.
(2) Connect the red lead to the upper
contact of switch S7901, and the
(1) Insert the test jack through the
black lead to the ground lug at con-
front side of the front panel and
nector J7907.
secure it; use the nut (i(3) above).
(3) Replace the chassis bottom plate
(2) Reconnect the Wire (i(2) above).
(b above).
(3) Replace the chassis bottom cover
e. Removal at Lamp Sockets XDS7901
(b above).
and XDS7902 (fig. 14).
(1) Remove the chassis bottom plate
(a above).
(1) Remove the chassis bottom cover
(2) Remove and tag the three leads
from each socket.
(a above).
(3) Remove the nut from the front
(2) Remove two wires from the switch.
panel rear side of each socket, and
(3) Remove the nut and lockwasher
remove each socket from the front
from the front panel front side
side of the front panel.
o f the switch and remove the
f. Replacement
of Lamp
Sockets
switch from the rear of the front
panel.
(l) Insert each socket through the front
1. Replacement of Switch S7901 (fig. 12
and 14).
side of the front panel and secure
(1) Insert switch S7901 from the rear
each; use the nut (e(3) above).
side of the front panel; be careful
(2) Reconnect the wires (e(2) above).
to seat the locating lug in the hole
(3) Replace the chassis bottom plate
provided.
(b above).
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