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Maintenance and Repair
10.
Install the encoder connector and the keypad connector to the rear of the keypad
assembly. Ensure proper polarity, with Pin 1 (the edge of the cable with a brown wire)
of the cable toward the left side of the unit. See Figure 9-5.
11.
Follow Procedure
12.
Follow Procedure
23
Binding Post Removal
1.
Follow Procedure
2.
Follow Procedure
3.
Follow Procedure
4.
Position the front panel in a suitable fixture or vise.
5.
Using a 13/64" drill bit, drill out each of the three binding posts from the front side of
the panel. It is not necessary to drill deeper than the metal front panel as the binding
posts will fall apart at that point.
6.
Remove the binding post printed circuit board and the rear of the binding posts.
7.
Blow off any debris from the panel with dry compressed air. Always use adequate eye
protection when using compressed air.
24
Binding Post Installation
1.
Ensure that the front-panel assembly is loose from the Model 1140A. If not, remove
the front-panel assembly using Procedure 21.
2.
Install the binding post with the undrilled stud into the lowest post hole in the panel.
3.
Install the two binding posts with drilled studs into the upper two holes; either post
can go into either hole.
4.
Orient the posts such that the flat side of each is aligned with the flat side of its hole.
5.
Loosely install one of the provided brass nuts on the rear of each binding post.
6.
Loosen the plastic clamping nut on the front of each binding post as far as it will go.
Note that the clamping nuts are captivated and will not come off.
14
for
Left Side Panel and Front-panel Bar
2
for
Top Cover
1
for
Top Cover
13
for
Left Side Panel and Front-panel Bar
21
for
Front-panel Assembly
WARNING
Use a properly grounded or double-insulated drill
when drilling out the binding posts. Use adequate
eye protection when drilling as well as when using
compressed air.
CAUTION
Use caution when drilling so as not to mar the front
panel.
Installation.
Removal.
Removal.
9-16
Installation.
Removal.
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