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Modification Steps:
NOTE: This is what I call the quick 'n dirty mod. The quick
'clean' mod is on the previous page. This mod is
probably most applicable if your speaker still has a long
cable attached.
NOTE: This amplified speaker (NSN6027A) uses a PC board with the ID# 84D05644D01 etched into the copper. This
model utilizes external output transistors which are physically attached to the PCB mounting frame. If your PC
board HAS this ID number but DOES NOT HAVE external output transistors, refer to the page of this document
which references model NSN0648A and PC board ID #84D05644D01.
1) Remove the speaker case and remove the screws holding the PC board to the internal frame.
2) All control cable wires are installed in a semi-circle around a cutout in the PC board. Also note that, on the
COMPONENT side of the PC board, several of the holes are labeled, for easy identification later. This will be
important in future steps. CONFIRM that the component-side labels MATCH those labels which have been added to
the PC board drawing shown above. If the numbers on do not match, then this may NOT be the appropriate set of
modification instructions.
3) Write down the wire colors for the following PC board points (standard colors are shown in parentheses): IN (Brn), SQ
(Grn), GND (Blk & Wht), +V (Red & Yel), and RET (shield).
4) Reassemble the speaker cabinet and make the following connections at the far end of the speaker cable:
Connect the two (2) GND wires and one (1) RET wire together. They are now "GND".
Connect the two (2) +V wires and one (1) SQ wire together. They are now "+V".
AF Input - Connect to IN wire and to GND
+12VDC - Connect "+" to +V, connect "-" the GND
5) Done..!
Motorola External (Amplified) Speaker
Model:
NSN6027A (printed on case)
84D05644D01 (printed on AF Amp PCB)
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