Page 4 Telecor Administrative Communication Systems
Troubleshooting
Problem Description
VU Meter registers a signal when no signal should
be present.
The amplifier may be oscillating, possibly at a very high frequency. This may be caused by:
running input and output wires close together, grounding the input, or incorrect grounding of
shield.
The “Current Overload” light illuminates or flashes.
This indicates that the amplifier is being overloaded. Check the total speaker load on the
amplifier. Also check for shorts in the output wiring, and for shorts to ground. If the amplifier
is being overloaded, reducing the load or the gain should solve the problem.
The “Clip” light illuminates or flashes.
Reduce the output level of the amplifier either by turning down the “Gain” control or by
reducing the “Input Level”.
The “High Temperature” light illuminates.
This indicates an excessively high temperature on the heat sinks. When this occurs, the
output level is reduced until the temperature returns to normal. Overheating of the heat sinks is
usually caused by insufficient ventilation or operating the amplifier in an overload state for an
extended period of time. Check the loading and ventilation of the amplifier.
Fuse blows.
This indicates excessive current draw by the amplifier. To replace the fuse, turn the amplifier
Power Switch OFF and unplug the amplifier from the AC receptacle. Unscrew the fuse knob
and replace the fuse with the same type, voltage and current rating as indicated on the amplifier:
TEL-125 amplifiers use a 3AG 250V 3A fuse, TEL-250 amplifiers use a 3AG 250V 8A fuse. If
new fuse also blows, unplug amplifier, contact Telecor Technical Support.
Specifications
Characteristics: TEL-125 Power Amplifier TEL-250 Power Amplifier
Input Level
1 V or 100 mV (switchable)
Input Impedance
10 kΩ (balanced)
Output
(into balanced 4 Ω, 8 Ω, 25 V, or 70 V line)
125 watts RMS 250 watts RMS
Frequency Response
40 to 15000 Hz (± 1 dB)
Total Harmonic Distortion
0.05% @ 1 kHz rated output
Output Regulation (with Transformer)
< 1 dB, no load to full load
Signal to Noise Ratio
(Band Pass 20 to 20000 Hz)
Input Level @ 0 dBv (1 V): > 94 dB Input Level @ 0 dBv (1 V): > 84 dB
Connectors
Screw-Barrier Terminals on input and output.
Mas-Con connectors are used with optional modules.
Controls
Power Switch (Illuminated), Gain Control, Low Cut Switch,
Input Level Switch (1 V / 100 mV)
Indicators
“Clip”, “High Temperature”, “VU Meter” and “Current Overload” indicators
Protection
Foldback current limiting
Over-temperature protection
Primary circuit fused at 3 A
Foldback current limiting
Over-temperature protection
Primary circuit fused at 8 A
Temperature Range
-10
N
C to +60
N
C (12
N
F to 140
N
F)
Power Consumption
AC 120 V, 60 Hz, 180 W AC 120 V, 50 Hz, 340 W
Weight
11.8 kg (26 lbs.) 19 kg (42 lbs.)
Dimensions
(without amplifier handles)
5¼" H X 19" W X 11c" D 5¼" H X 19" W X 12c" D
Approved Standards
UL 813
Finish
50/50 Fine Texture Semi-Gloss Splatter Black
Specifications subject to change without notice.
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