Crate Amplifiers TXB50 - Manual (Page 4)

4
ABOUT THE POWER SUPPLY:
The TXB50 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 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 to an AC outlet. The LED near the charger jack will illuminate 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 TXB50 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
in 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 #17, page 8) doesn’t
illuminate, the battery might be beyond recharging. (The TXB50 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 15VAC charger to
the amplifier’s 12VDC Cigarette Lighter Adapter jack.
CAUTION! The TXB50 contains a sealed, rechargeable,
lead-acid battery. Dispose of battery properly. Improper
disposal of the battery or replacement with any other
type may cause leakage, explosion, and/or injury. Refer
also to the warranty card.