6. The RECORDER pushbutton LEDs (3) LOWER LEFT and UPPER RIGHT cannot be
replaced as described in Step 5. To replace these LEDs, it is necessary to remove the
pushbutton keys and the AIM Keyboard.
a. Remove key housing the defective LED by prying the key outward using a pointed
instrument such as a soldering aid.
b.
Remove sub-panel and A1A1 Keyboard by removing the screws (4) from the perimeter
and pulling forward.
C. Unsolder the defective LED from the rear of the A1A1 Keyboard.
d. Loosen the leads from the printed circuit board using a soldering aid and push on the
leads to force LED out of switch through the front of the panel.
e. Insert new LED through the switch from the front of the panel so that leads extend
through the printed circuit board at the rear of the keyboard. Negative (cathode) lead
goes to square pad on printed circuit board.
f. Pull leads of LED with fingers or needle-nose pliers to ensure that LED is far enough
inside of the switch to allow the key to be reinstalled.
g. Solder LED leads to printed circuit board, trim excess lead length, and reassemble front
panel.
SUB PANEL VIEW
LEAD IDENTIFICATION
Figure 2. Front Panel LED Replacement
A1A1 3
To Next Page
Loading...
