Troubleshooting - Viola Systems FORTE MONO Owner's Manual

TROUBLE SHOOTING
Most problems may be resolved by following the steps below. If these fail, please
contact your VIOLA dealer, national distributor or VIOLA directly.
1. No sound and the front panel LED is not lit?
•
Press the front panel power switch to confirm that the unit is not
switched off. If there has been a temporary interruption to the mains
supply, or the supply voltage has dropped below certain limits, the unit
will automatically shut down and cannot be restarted until the mains
voltage returns within the normal operating range.
voltage and normal operating range for 120V and 240V units are
shown below.
Mains Setting
120V
240V
•
Check that the power lead is inserted all the way into the AC input
receptacle on the rear panel, the other end is plugged into the AC wall
outlet and if applicable, that the wall socket is switched on.
• Check that there is power on the AC wall socket by connecting
another piece of equipment that is known to work to the socket.
• Check the mains fuse as shown in the MAINS FUSE section of this
manual.
2. No sound and the front panel LED is lit?
• Have you allowed at least 10 seconds to elapse after pressing the
power on button, so that the unit has had time to stabilize and for the
output to un-mute?
• Check all of the signal wiring in the system.
• Check that all the units feeding the amplifier are switched on.
• Check that the input selector and any other relevant switches are
set appropriately.
• Check that the signal source is playing.
• Check that the pre-amplifier and or signal source volume control(s)
are set at a level that is loud enough to hear.
3. The amplifier keeps shutting down?
• Disconnect the input and the speaker cables.
• Try to switch the amplifier on. If it starts (front panel LED comes
on) and it stays on, there is either a fault with the signal source such
as a DC voltage on one or both channels, or a short circuit in the
speaker cables or speaker. This may be isolated in the following steps.
Viola Forte Manual Rev 2
Drop Out Voltage
90V
190V
Page 12 of 15
The drop-out
Normal Operating Range
90V – 140V
190V – 280V
th
7 September 2005