Troubleshooting - Vox Valvetronix Amp VT15 Owner's Manual

Troubleshooting

1. Power does not turn on when you turn the [POWER] switch on
- Is the power cable connected to the rear panel AC power inlet?
- Is the power cable connected to an AC outlet?
- Could the AC outlet be malfunctioning?
- Could the power cable be damaged?
2. No sound from the amp
- Could your guitar's volume be turned down?
- Is your guitar cable connected correctly?
- Could your guitar cable be broken?
- Could the top panel [MASTER] volume be turned down?
- Could headphones be connected to the top panel PHONES jack? If so, disconnect them.
- Check the settings of the [GAIN], [VOLUME], [TREBLE], [MIDDLE], and [BASS] controls.
- If the VT15/30 is in Manual mode (MANUAL LED lit), could the [GAIN], [VOL-
3. Insufficient volume from the amp
- Could your guitar's volume be turned down?
- Could the [MASTER] volume be turned down?
- Could the rear panel [POWER LEVEL] be turned down?
- Check the settings of the [GAIN], [VOLUME], [TREBLE], [MIDDLE], and [BASS]
- If the VT15/30 is in Manual mode (MANUAL LED lit), could the [GAIN], [VOL-
4. No sound from the PHONES jack
- Could the top panel [MASTER] volume be turned down?
- Check whether sound is output from the amp.
5. Effects are not applied
- Could the BYPASS LED be lit?
- Could the [EDIT] knob be set to the minimum value?
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For some amp models, there may be no sound from the amp if the [TREBLE], [MIDDLE],
and [BASS] controls are turned down, just as for the circuitry of the original amp.
UME], [TREBLE], [MIDDLE], and [BASS] controls be set to 0 or the minimum value?
controls. For some amp models, there may be no sound from the amp if the [TREBLE],
[MIDDLE], and [BASS] controls are turned down, just as for the circuitry of the origi-
nal amp.
UME], [TREBLE], [MIDDLE], and [BASS] controls be set to 0 or the minimum value?
To do this you must disconnect the PHONES jack, since sound will not be output
from the internal speaker if headphones or a cable are connected to the PHONES jack.
If no sound is produced from the amp, check the items listed in "No sound from the
amp," above.
If there is sound from the amp, check whether your headphones or cable might be
broken or malfunctioning.
If it is lit, the effect is bypassed. Press the [BYPASS] switch to defeat bypass. The
BYPASS LED will go dark.
Adjust the [EDIT] knob.