S-Helper Service F7 Notes

Operator's Manual


(photo © Steve Wolcott)

Operator's Manual

Disassembly

Follow the link to see how to disassemble the engine's trucks. The F7 is done the same way as the NW2 (which is what is shown on the site).
How to disassemble SHS trucks

Lights Warning!

Don Thompson warns to not plug DCC decoders into this engine without dealing with the headlights first. The headlights are 5-volt bulbs, and they will blow as soon as the decoder receives power (usually around 12 volts). One option is to consider replacing them with LEDs and a matching resistor. The same applies to class lights, numberboards, and Mars lights, as applicable.

Multiple-unit Operation

If you operate multiple F7 engines together in a consist ("MU"), and each have their own LocoMatic board (i.e. they could each be operated on their own), the MU cable between the units is not to be used. If one engine is a slave (i.e. it cannot operate on its own), then the engine needs to be connected with an MU cable.

The photo shown here is of the circuit board is for the
- F7 A-unit
- multiple-unit
- non-sound version
(part #661-X033R3)

Printed-circuit Boards

This circuit board is for the
- F7 B-unit
- DC power
- non-sound version
(part #661-X004R1)

This photo shows the above-mentioned circuit board installed.

This circuit board is for the
- F7 A-unit
- AC or DC power
- non-sound version
(part #661-X030R2)

This circuit board is for the
- F7 A- and B-unit
- DC power
- non-sound version
(part #661-X031R4)

This photo shows the above-mentioned circuit board installed.

LocoMatic Sound

This board is for the
- F7 A-unit
- LocoMatic
- AC or DC power
- sound version
(part #01201)

Soundtraxx Tsunami Sound

This refers to the first-generation of Soundtraxx Tsunami DCC sound decoders (the second-generation came out much later). This document provided by Don Thompson contains the configuration variables (CV) settings with which the models were configured when shipped from S-Helper Service. Note that at some point in the production run, these were replaced with QSI Revolution sound decoders (see below), because the F7 models could draw more amperage than what the Tsunami decoder could provide. The photo shows this board installed.
Tsunami Configuration Variables (CV) Settings
How to Install Soundtraxx DCC Sound Decoder

QSI Revolution Sound

This document provided by Don Thompson describes how to install the QSI Revolution sound decoders. These were used in the later runs of this engine.
QSI DCC Installation Document

TMCC Installation

TMCC Compatible Conversion

Reference

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