18
R-17 Subway Set with Proto-Sound® 2.0
Self Charging Battery Back-Up
The 2.4v NiCad self-charging battery pack recharges continuously during train operation
and should last for up to five years. It is a battery type that should not leak or cause any
damage to your engine. Depending upon when your engine was built, the battery may need
to be charged right out of the box.
If engine sounds seem distorted or garbled at low voltages or become silent when power
from the transformer is turned off, test the batteries to determine whether the battery should
be recharged or replaced.
Test: Put the engine in neutral and leave the track voltage at 10-12 volts (high enough for
the lights to shine brightly) for 15 minutes.
Recharge: If the sounds are improved at the end of the 15-minute test charge, the batteries
charge has run down and can be recharged. There are a number of ways you can do this:
Leave the engine in neutral with track
voltage at 10-12 volts for 6-7 hours so
the batteries can fully recharge (if your
engine has a smoke unit, be sure it is
turned off).
Use M.T.H.'s battery recharger (sold
separately) that plugs into a wall outlet
and a special port under the engine to
recharge the batteries overnight without
leaving it on the track. (See figure 11)
Replace: If the sounds are not improved
at the end of the 15-minute test charge,
it is time to replace the batteries. Available
through M.T.H. Parts. (See figure 10)
DO NOT substitute alkaline batteries for
these NiCad batteries. Using alkaline
batteries in this system will result in damage
to the PS 2.0 circuit board and/or the batteries.
Unhook Wires, Remove,
and Replace Battery
Figure 10
Battery charging port
under the engine
Figure 11
