revolution of the drivers. The switch is located in the front center of the tender
under the polarity switch (small switch, Figure 18).
To use the locomotive’s internal chuff for sound cards that do not plug into
the socket, connect the sound board chuff connections to the main PC board
solder pads, titled “Chuff Sensor” and “GND” (Figure 20). When used with DC
track power, the optical sensors are electronically activated before the locomotive
begins to move. If desired, your sound system’s “+ -” inputs can also be used
to directly power the locomotive’s chuff circuits using the “INPUT BATT 2”
screw terminals at the left rear of the main PC board in the tender (Figure 23).
These terminals have a voltage input from 5 to 14 volts DC. Refer to your sound
system for more instructions on properly connecting it to the 4-6-0. Note: this
connection is not needed for either DCC or RC with Battery Operation as
power for the chuff circuit is provided by the device in the plug-and-play socket.
23
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