Next: Locate the PCB mounting screw located in the front right corner of the radio. It is just below the
ribbon cable connection. Install the BHI ground lug under that screw.
Hint
(I install heat shrink around the module to prevent any
possibility of a short circuit with long term vibration on a mobile
radio.)
Next solder the red power wire to the output lead of the 8-volt
regulator (green triangle). Next route the switch wiring under the felt
wire hold down (blue circle). It is important to make sure the wires
are routed in the access relief to prevent pinched wires when the
cover is installed.
Hint
(use a razor blade to lift one side of the felt,
then re-glue it back in place.)
When these steps are complete, tuck the BHI module in the
righthand corner open space. Make sure the module is DSP chip is
facing up and the module is lower than the chassis wall.
Hint
(you do
not want the lid to press on the module and put undue pressure on
the components. The module will tuck nicely in the corner with the
lid gently holding it in place).
Next: In the next few steps, it is critical that you use caution when soldering on the PCB. I included an
SMT explanation at the end of this instruction. If you are not SMT experienced, please read it now.
Now locate C1473. C1473 is located just behind pin 7 of IC Q1120. Be
careful, there other circuits that look similar. I suggest you look at a service
manual to accurately find this capacitor.
Hint
(Service manuals can be
searched and down loaded from Ham helpful web sites free of charge.)
