MTH Electric Trains AEM-7 Instructions d'exploitation télécharger pdf (Page 9)

MTH AEM-7 Operating Manual

down even though the sounds play. This simulates the wheel flange squeal of

a train traveling through a turn too quickly.

Note: Consistent activation of the wheel flange squealing is determined by the

condition of your transformer’s whistle button rectifier disc. Older rectifier

discs may not release a clear and strong enough DC signal required by

ProtoSound’s computer to play the wheel flange squealing.

SELF-RECHARGING BATTERY

BACKUP

ProtoSounds® state-of-the-art design includes a self-recharging battery

backup system for improved performance at any speed. The self-recharging

battery backup system is automatically turned on or off whenever track

power is turned on or off. There are no switches to turn on or off to enjoy

the benefits of the automatic battery backup system. The battery ensures

that power to the sound system will remain on during directional changes,

setting RESET options, or when traveling over dirty track and switches.

The battery is a rechargeable NiCad type which is continually charged from

the track when power is applied. NiCad batteries are a dry battery and

should not leak or cause any damage to your locomotive and will last up to

five years or longer. 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 6 hours.

REPLACING THE PROTOSOUND BATTERY

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

7020 Columbia Gateway Drive, 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.

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MTH Electric Trains AEM-7 Instructions d'exploitation Page 9