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1. Check the speaker cone for magnetic debris that may have collected there.
Debris on the speaker will cause a loss of sound quality and must be removed.
2. Be sure that the CV58 volume is not set at a level that is too high for the
speaker being used. For impedances below 32ohms (e.g. 8 to 30 ohms) set this
volume setting lower to ensure the 1 watt output rating is not exceeded.
If the sound in your decoder shuts down after you stop it and you are not
using a Digitrax system for control.
On some DCC systems decoders are not
addressed by DCC packets after the locomotive is set to 0 speed. In this case
after the CV11 timeout elapses (6 second default), sound will “shutdown.”. To
defeat this feature, set CV11=00 to remove the timeout and shutdown.
To make
sounds, this decoder must have a command addressed to it at least once.
If you have trouble reading back CV’s on the programming track
, this may
be due to insufficient current draw on the SDN144A0 motor or function leads.
Of course you can always just re-program the CV value into a CV to get the
desired results, even though reading CV’s might not work.
OPS mode is recommended for writing to (programming) all CVs except
CV01, CV17 & CV18 (2 digit and 4 digit addresses). If a second DCC
decoder is present that is not Sound FX compatible then correct read back of
CV data is not possible, since the NMRA CV read back was not designed for
multiple decoder read back.
The SDN144A0 plays an Alco C420 Diesel scheme, but I want the default
GP38 scheme.
If the factory scheme has not been erased, program CV60 to a
value of 0 to reselect the GP38 scheme. Alternatively set CV60 to 01 to
change to the Alco C420 sound scheme.
I have loaded a new scheme but the CV’s and Functions are not what I
expected.
Load the sound project you programmed and then select the
“view>project description” menu and then read the text file on the screen that
defines how that project in particular uses CV’s and Functions for sound
generation and configuration. Even without a programmer you can get
SoundLoader and the sound projects from the Digitrax web site and review the
descriptions on your compatible PC.
My speaker does not have a polarity mark.
Speaker Polarity is simply used
to ensure when more than one speaker is being used that they can be wired or
“phased” so the input causes the diaphragm to move in the same direction. It
can be ignored in a single speaker case.
When using my LT1 and test kit when I blow the Horn the decoder resets.
Using the LT1 test kit and protection resistor is good to check the decoder is
safely connected, but when a loud sound like a horn is activated the protection
resistor limits the available power too much, so the decoder resets. Simply test
full volume sounds on normal track power after connections check OK. If vol-
ume overloads decoder and loco slows, set CV57=0 to turn off BEMF.
Warranty & Repair
Digitrax gives a one year
“No Worries" Warranty
against manufacturing defects and
accidental customer damage on all Digitrax products.
That's it! A simple, straightforward warranty with no tricky language!
Visit www.digitrax.com for complete warranty details and instructions for returning
items for repair.
