XP3210-006 – 18JUL97
9
[19] Measure the input and output voltages of the new
DC-DC CONVERTER and compare these
voltages to the table. If the voltages are not
correct, advance to the procedure Replacing the
KEYPAD OVERLAY/BOARD ASSEMBLY
on page 13.
[20] If the input and output voltages of the new DC-DC
CONVERTER are correct and none of the
STANDOFFS are broken, assemble the
KEYPAD OVERLAY and the CIRCUIT
BOARD using the 4 BUSHINGS. Advance to
Step 26.
[21] If 1 or 2 STANDOFFS are broken, remove any
pieces of the old STANDOFFS from the back of
the KEYPAD OVERLAY. The area where you
attach the new STANDOFFS must be flat.
Sandpaper or a file can be used to make the area
flat.
A broken STANDOFF could be repaired with
adhesive if the pieces can be aligned.
[22] Install each new STANDOFF and BUSHING.
Warning
Do not allow adhesive to contact skin.
[23] Place one drop of Loktite 414 ADHESIVE to the
end of each new STANDOFF.
[24] Assemble the KEYPAD OVERLAY and
CIRCUIT BOARD. Attach and tighten
BUSHINGS to the existing STANDOFFS.
[25] Apply pressure to the KEYPAD OVERLAY/
CIRCUIT BOARD ASSEMBLY for 60 seconds
until the ADHESIVE is dry enough to handle.
Important
Handle the ASSEMBLY carefully. The ADHESIVE
does not reach full strength for 24 hours.
[26] Place the KEYPAD OVERLAY/BOARD
ASSEMBLY into the KEYPAD. Be careful not to
damage the RIBBON CABLES and other wires.
[27] Inset the four screws and washers into the back of
the KEYPAD and tighten them. If any SCREWS
are broken, replace them.
H027_2521AC
SURFACE
PREPARED
OVERLAY
KEYPAD
BOARD
CIRCUIT
STANDOFFS
EXISTING
BUSHING
NEW STANDOFF
H027_2521ACA
