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ABOUT
THE POWER SUPPLY:
The TX50DE uses a sealed lead-acid 12-volt battery as its internal
power source. Unlike ni-cad batteries, this battery has no “memory” – it
can be fully recharged at any time, without damage to the battery.
When fully charged, the LED next to the power switch will illuminate
yellow with the switch at the on (“I”) position. The LED will change to
red when the battery is low and needs recharging. When this happens,
turn the amp off, connect the 15-volt charger to the charger jack and
plug it in. The LED near the charger jack will glow red while the amp is
charging and goes out when the amp is fully charged. The battery fully
recharges within 6 hours, providing up to 8 hours of use at low levels,
about 4 hours of use at moderate levels, and about 2 hours of use at
continuous full power (sine wave). The battery is rated for up to 1000
charging cycles. The charger can also function as an AC power supply.
The battery inside the TX50DE must be fully charged before operating
the amplifier for the first time. The amplifier leaves our factory with a
fully charged battery. However, the battery may lose some of its charge
during transit.
NOTE: If the battery is drained too low, the Power LED will go out. This
indicates an exhausted battery – one which may not take a charge. If
this happens, turn the amp off, connect the 15-volt charger to the
charger jack and plug it in. If the Charger LED (see #25, page 8) doesn’t
illuminate, the battery might be beyond recharging. (The TX50DE uses a
“smart” charging circuit and will not allow you to charge a defective
battery.) If the battery is serviceable, the LED will illuminate once the
battery reaches 10 volts – leave the charger plugged in and let the bat-
tery fully recharge. If the LED never illuminates, the battery may need
replacing. Contact Crate’s service department:
SLM Electronics
1901 Congressional Drive
St. Louis, MO 63146
1-800-738-PARTS (7563)
To avoid damaging the amplifier, do not connect the supplied 15VAC
charger to the amplifier’s 12VDC Cigarette Lighter Adapter jack.
Dispose of battery properly.