M.T.H. EMD F40PH DIESELLOCOMOTIVE Operating Instructions Manual - page 14
F40PH Diesel Operating Manual
14
transformer is shut off, the battery may be going bad. Before replacing the battery, you
should put the engine in NEUTRAL and leave the transformer throttle at about 12 volts for
fifteen minutes. This should temporarily recharge the battery. If the garbled or distorted
sounds are reduced, then your battery charge has worn down. You can give your battery a
full charge by leaving the engine ON in NEUTRAL for 16 to 18 hours.
The ProtoSound™ battery is a special NiCad 7-cell, 8.4v battery - NOT the 6-cell, 7.2v
battery found in most convenience stores. The 6-cell NiCad is NOT recommended for use
with ProtoSound™ applications. Replacement ProtoSound™ batteries are available from
MTH ProtoSound Electronics at 9693-A Gerwig Lane, Columbia, MD 21046. A standard
9v alkaline battery can be substituted as a temporary fix, but since alkaline batteries can’t
take a charge, it will eventually wear down. Regardless, it should give you a week to a
couple of months use while you wait for your replacement ProtoSound™ battery to arrive.
REPLACING THE PROTOSOUND BATTERY
If you notice that the sounds seem distorted or garbled at low voltages or become silent
when power from the transformer is shut off, the battery may be going bad. Before replacing
the battery, you should put the engine in NEUTRAL and leave the transformer throttle at
about 12 volts for fifteen minutes. This should temporarily recharge the battery. If the
garbled or distorted sounds are reduced, then your battery charge has worn down. You can
give your battery a full charge by leaving the engine ON in NEUTRAL for 16 to 18 hours.
PROTOSOUND™ VOLUME ADJUSTMENT
Your ProtoSound™ system has two types of volume adjustment. A manual turn knob on
the bottom of the chassis (See Fig. 6 below) allows you to control all the sounds in the
system and a remote control “RESET" option (Option # 6), allows you to control the volume
level of the engine sounds remotely from the transformer. Turning the volume adjustment
knob clockwise will increase the volume and counterclockwise will lower the volume of all
sounds; bell, horn, engine sounds, Cab Chatter, etc.
Figure 6: Manually Adjusting The ProtoSound Volume