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4
ABOUT
THE POWER SUPPLY:
The TX50D 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 glow 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 charg-
ing 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 TX50D must be fully charged before operating
the amplifier for the first time. Even though the amplifier leaves our
factory with a charged battery, time spent in shipping may cause the
battery to lose some of its charge.
WARNING!
Never connect the supplied 15VDC charger
to the amplifier’s 12VDC Cigarette Lighter Adapter jack!
Damage to the amplifier may occur!
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 TX50D uses a
“smart” charging circuit and will not allow you to charge a defective
battery.) If the battery is serviceable, the LED will glow once the battery
reaches 10 volts – leave the charger plugged in and let the battery 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)