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Maintenance and Repair
Charging
supply
connector
Ac line filter
20
Power-supply Assembly Installation
1.
Hold the power-supply assembly over the Model 1140A and insert the power switch
extension shaft through the cutout in the front panel.
2.
Lower the power-supply assembly into the chassis in front of the ac line filter.
3.
While holding the power switch extension shaft, install the push-button cap of the
POWER button onto the end at the front panel.
4.
Slide the power-supply assembly back under the ac line filter until the four mounting
holes line up with the standoffs. While sliding it back, guide the push-button cap of
the power switch into the front-panel cutout.
5.
Install the four power-supply assembly mounting screws and lock washers, located
near the four corners of the board, using a #2 Phillips screwdriver. Tighten to 6 in-lb
torque.
6.
Plug the two interconnect ribbon cables into the power-supply assembly. Ensure
proper polarity, with Pin 1 (the edge of the cable with a brown wire) of each cable
toward the rear or right side of the unit. See Figure 9-11.
7.
Plug in the two-pin charging supply connector. See Figure 9-11.
8.
Follow Procedure
21
Front-panel Assembly Removal
1.
Follow Procedure
2.
Follow Procedure
3.
Remove the keypad connector from the rear of the keypad assembly. See Figure 9-5.
4.
Remove the display connector from the rear of the LCD display assembly. See
Figure 9-5.
5.
Remove the encoder connector from the rear of the keypad assembly. See Figure 9-5.
Figure 9-11: Power Supply Assembly
2
for
Top Cover
Installation.
1
for
Top Cover
Removal.
13
for
Left Side Panel and Front-panel Bar
9-14
→ Front
Power switch
extension shaft
Removal.
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