WhitakerAudio J C Whitaker 20 W Stereo Audio Amplifier, Manual

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20 W Stereo Audio Amplifier
– Insert the 24 V dc relay in the socket on the right channel PWB.
– Mount the relay RYL2 socket on the left channel speaker PWB. Solder in place.
– Insert the 24 V dc relay in the socket on the left channel PWB.
– Mount the 4-terminal Molex header (male, 0.1 pitch) at the Conn5 position on the right
channel speaker PWB. Solder in place.
– Mount the 4-terminal Molex header (male, 0.1 pitch) at the Conn7 position on the left
channel speaker PWB. Solder in place.
– Mount the 4-terminal Molex header (male, 0.156 pitch) at the Conn6 position on the right
channel speaker PWB. Solder in place.
– Mount the 4-terminal Molex header (male, 0.156 pitch) at the Conn8 position on the left
channel speaker PWB. Solder in place.
The completed PWB is shown in Figure 5.14.
– Place a self-adhesive vinyl pad on each of the four corners (approximately) of the two
speaker terminal PWBs (eight pieces in all). The pads are intended to make sure the
speaker PWBs do not make contact with the barrier strip mounting screws and to support
the board as connections are made.
If desired, a single light coat of acrylic conformal coating (MG Chemicals #419C-340G) may
be applied to the foil side of the speaker terminal PWBs.
Figure 5.14 Speaker terminal PWB: ( a ) component side, ( b ) foil side.
( a )
( b )