Inc N Scale Function Decoder - Manual

grinding or cutting tool carefully cut a shallow 0.028” outside groove that

will allow the speaker wires to pass down the e.g.; left frame side, inside

the track spring and across to the center of the frame at the rear of the diesel

tank, as shown in Figure 3.

3. Reinstall the parts from step 1 in reverse order, substituting the SDN144K1E

decoder with added motor clips, for the factory light PCB. Make sure to

place some of the supplied Kapton tape under the motor saddle to ensure

the motor clips cannot short to the frames. Place the 13mm speaker in the

mounting location created in step 2, with the magnet side facing out and

ensure the speaker wires do not cause any binding problems and the insula-

tion is not damaged. Note that the frame halves are energized with track

voltage so no wires or metal speaker parts should short to these. Be sure to

inspect the speaker diaphragm for magnetic debris, dirt or damage, which

will affect sound quality. Other speaker(s) may be substituted and mounted

in combinations as long as the total impedance on the black/red speaker

wires is greater than 8ohms.

4. (Optional) Functions for other lights etc., may connected to the pads identi-

fied in Figure 4. These function leads effectively switch the track voltage,

so LED’s and 1.5V lamps will need current setting resistors installed exter-

nally as required.

5. In a SD40-2 unit installation the wired 100uF/25V electrolytic energy stor-

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850-872-9890

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850-872-9557

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Figure 2: Kato SD40-2 -speaker mount hole in tank

space machined for speaker

13mm factory speaker

Figure 3: SDN144K1E Decoder installation in Kato SD40-2 - reassembly.

13mm Factory speaker

mounted in machined hole

kapton tape across

frame, under decoder

speaker wires in

added outside

grooves

Capacitor mounted in

cab volume. Trim left

side of small clip

diesel tank cover with

vent holes added