Parasound 2250 - Manual (Page 12)

No sound
- Check that AC is live.
- Is the unit on? Check the setting of the Auto Turn On switch.
- Check that input cables and speaker wires are secure at both ends.
- Make sure the control preamp/receiver is switched to the correct input.
- If using Audio Auto turn on feature, increase the sensitivity by turning the sensitivity knob
towards the + position. You may also want to turn the Left and Right gain down to reduce the
Auto turn on volume level.
- Is the Hi-Temp or Protect (or both) illuminated? Check for excessive temperature, short circuited
speaker wires, low impedance speaker load, and inadequate ventilation to remove heat.
Background Hum
- Move the Ground switch to Lift.
- Move audio cables and AC cords away from each other.
- Try different routes for the audio cables and AC cords.
- Make sure insulating shoulder washers are used if unit is rack mounted.
- Try reversing the direction of each other component’s AC plug, one by one.
Overheating
- Remove any external sources of heat.
- Increase ventilation around the Model 2250.
- Reset the Load Impedance switch to 2-3 Ohms.
PROBLEMS AND REMEDIES
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