e)
Put a known good battery in the unit (but leave the battery door off). Put the
unit in the P671A jig, fold the jig arm over the unit and lock the arm in
position.
f)
Connect the SINAD meter to the alignment pins on the P671A (refer to
Figure 5.12)
g)
Set the modulation of 1kHz to a deviation of 3 kHz and switch it ON. Adjust
CV404 to give 12dB sinad with minimum RF input. A reading of -98dB
should be achieved.
NOTE:
h)
Carefully remove the Board Assembly from the case. Remove the BEC
disable 0 ohm resistor or the shorting link from R456 position. Carefully
assemble the Board Assembly in the case and put a new label on the case
back to cover the aerial trimmer access hole.
CV407
CV406
CV405
CV404
TM1205 Issue 2
Do not disturb the aerial during the next operation.
ALIGNMENT PINS
ARM LOCK
Figure 5.12: P671A Showing the Tuning Points
TLA 852/FLA 872
PROGRAMMING PINS
ARM
Page 5 - 23
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