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Atlas User Manual: Diesels
with QSI Sound
45/52
13 January 2015
Decoders (Quantum, Quantum Titan, or
Quantum Titan with ET)
6 Special Operation and Troubleshooting
For additional information on trouble-shooting, see Appendix III,
DCC Troubleshooting
, in the
NMRA DCC Reference
Manual for QSI Quantum 3, 2, and 1 Equipped Locomotives
[3]
.
6.1 Doppler Shift Problems (DCC)
With some DCC systems, using the
Horn
button to activate the
Horn
and also activating the
F6
or
Doppler
key while
the
Horn
button is held down, will cause the
Horn
to shut off instead of causing a Doppler shift effect. We have
experienced intermittent and independent
Horn
signal interruption with certain DCC systems, causing unexpected
Doppler shifts. If this happens frequently on your layout, you may wish to disable the
Horn-Triggered-Doppler shift
using CV51.2. (See Section 4.2.12.)
6.2 Reed Switch Operation with the Magnetic Wand (Analog and DCC)
An Atlas sound-equipped diesel locomotive that is equipped with a QSI Quantum sound-decoder has a special
Reed
Switch
located directly underneath the top of the plastic locomotive shell. This switch can be activated by the
Magnetic Wand (included with each Atlas QSI-equipped Gold Series locomotive) without having to disassemble the
loco. The reed switch can be used to reset the locomotive parameters to factory defaults, to change the overall
volume of your sound system, or to turn on a locomotive that has been shut down. This last capability applies to DC
(Analog) operation only.
6.2.1 Resetting your QSI-equipped Gold Series Locomotive to Factory Default Values
Using the Magnetic Wand (resets all Analog and all DCC parameters)
Resetting the firmware in the sound-decoder to its factory-built configuration can resolve many problems that can
sometimes occur with firmware-controlled electronics. In fact, at Atlas we have found that at least 20 to 25 percent of
the problems with Gold Series locomotives that we receive for repair can be resolved simply by resetting the sound-
decoder. Hence, the very first step you take to resolve a problem should
always
be to reset the sound-decoder in
your locomotive. With QSI sound decoders, there are two ways to reset the decoder parameters (1) the DCC-only
reset described in Section 4.2.6 that resets only the DCC CVs and (2) the magnetic wand reset described here that
resets both DCC CVs and analog parameters. Since a number of parameters (e.g., sound volumes) are shared
between DC and DCC operation, the magnetic wand reset does a better job of resetting the decoder to its original
factory configuration than does the DCC-only reset. Hence, Atlas recommends resetting using the magnetic wand
whether your locomotive is normally operated on DC or on DCC.
The following items are needed in order to do a magnetic wand reset.
The magnetic wand reset procedures given below apply to all Atlas Gold Series locomotives, both HO and Two-Rail
O-scale.
Resetting with the magnetic wand can be done on either a DC-powered track or a DCC-powered track.
68
Instead of this 4-page magnetic wand resetting booklet, older (pre-Titan) Atlas Gold Series locomotives included a 4-page locomotive
information booklet (packed with the locomotive) that showed (in a photo at the top of page 3) where to place the magnetic wand on the top of your
locomotive
ITEMS REQIRED FOR MAGNETIC WAND RESET
1. The Gold Series locomotive that you wish to reset
2. The magnetic wand (packed with your locomotive)
3.
The three photographs on the last page of the 4-page magnetic wand resetting
booklet
67
packed with your locomotive
titled
Using the Magnetic Wand to Reset an
Atlas Gold Series
(model) (scale)
Locomotive Equipped with a QSI Quantum Titan
(with ET) Sound-Decode
r
that show where to place the magnetic wand on the top
of your locomotive
4. A DC- or DCC-powered track
5. Either a power pack with a
variable-voltage
DC
output or a DCC system