12/24/07
888-2685-001
5-5
WARNING: Disconnect primary power prior to servicing.
Section 5 Replacement Procedures
Ranger Commissioning Manual
per clamps can be used to finish removal of the board with less pressure
required.
STEP 7
Remove the thermal pad from the heat sink and discard. These pads
should not be reused.
STEP 8
Wipe off any thermal grease or other residue from the heat sink using the
cotton cloth and alcohol. Make sure the surface is completely clean in
preparation for the installation of the new pallet.
STEP 9
Install the new thermal pad. The pad is oriented so the brown wire is
passed through the hole as the pad is installed on top of the heat sink. It
does not matter which side of the thermal pad is up and which side is
down as there is no performance difference.
STEP 10
Position the new PA pallet in place with the brown wire directed through
the corresponding hole in the pallet.
STEP 11
After the pallet is placed, make sure the DC power wire passing
underneath the pallet is entirely inside of the designated channel in the
heat sink and is not between the pallet and the heat sink.
STEP 12
Install the seven mounting screws and torque each to 15 inch pounds.
STEP 13
Solder the brown DC power wire onto the newly installed pallet using
the soldering iron and Sn63Pb37 solder.
STEP 14
Use an Ohmmeter to check the resistance from the brown power wire
pad to ground. It should be 1K ohm or greater. If the meter shows a short
circuit or low Ohm reading between these two points, remove the pallet,
and check the wire position underneath the pallet. Fix the position of the
wire and re-mount the pallet.
STEP 15
Solder the input and output ribbon wires to the pallet, make sure the
ribbon wire is not broken, damaged, or touching ground at any point.
STEP 16
Clean all three solder connections with a piece of cotton cloth and
alcohol.
STEP 17
Replace the lid on the module and reinstall all the screws.
Install the module back into the transmitter and push the ON button, check the value of
the DC current consumed by the new pallet. It should be the same as for the rest of the
p/- 10%.
Summary of Contents for Ranger Series
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