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Troubleshooting
9
PROBLEM CONDITION CAUSE
NO SOUND
Power Switch Indicator is OFF.
• Amplifier not plugged in.
• AC outlet dead.
• Power switch off.
• Circuit breaker tripped.
Power Switch Indicator is ON.
• No signal from source.
• Volume turned down.
• Speakers not connected correctly.
• Link jumper not set correctly (pg. 5).
DISTORTED SOUND
Power Switch Indicator is ON.
Volume Controls are turned up.
Unit is extremely hot.
Little volume.
• Partial short on the output. Check
speakers and wires.
Power Switch Indicator is ON.
Volume up. Good volume.
• Signal from source is already distorted.
• Input signal too large for input type
(reduce signal level applied to input).
• Poor speaker connections.
• Transformer output load on wrong tap.
• Bass control boosted too much.
• Output too great for speakers, reduce
level.
POOR
LOW FREQ.
RESPONSE
(NO BASS)
Power Switch Indicator is ON.
Volume controls are in normal,
operational position.
• Speakers wired out of phase.
• Bass control set to cut side
Note: Transformer-coupled speakers have
less bass response.
NOISE/HUM
Power Switch Indicator is ON.
Volume controls are in normal,
operational position.
• Poor electrical connections at input.
• Shields of cables not connected.
• Input cable routed near AC cables, power
transformer, or other EMI radiating
devices.
• Electrically noisy devices operating on the
same AC circuit.
• Poor equipment grounding.
- Ensure that all AC safety grounds are
connected.
- Make sure that all components in audio
chain are tied to the same ground.