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Modification Steps:
1) Remove the speaker case and remove the screws holding the PC board to the internal frame.
2) In the middle of this PC board is a spring-type heatsink which should be covered with heatsink thermal compound.
Either use care to not remove any of the compound from the heatsink, or wipe it off completely and re-apply it during
reassembly of the speaker.
3) NOTE that all control cable wires are installed in a semi-circle around a cutout in the PC board. Also note that several
of the holes (1, 5, 8 & 11) are numbered (on the COMPONENT side of the PC board), for easy identification later.
This will be important in future steps.
4) With the exception of the speaker wires, connected to holes 3 & 4, CAREFULLY desolder and remove ALL wires from
the remaining PC board holes.
5) Install new DC power leads, connecting them to holes 10 (GND) and 11 (+12VDC).
6) Install a new shielded AF input lead (RG-174 works nicely), connecting to holes 5 (AF GND) and 6 (AF IN).
7) Re-route the DC and AF leads out of the case, and reinstall the PC board to the mounting frame. If you removed the
heatsink compound in step 2, re-apply it now. Reinstall the case.
8) Install DC and AF In connectors as appropriate. DONE!
Motorola External (Amplified) Speaker
Model:
TLN2435A (printed on case)
TRN5276A (printed on AF Amp PCB)
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