Troubleshooting - Ibanez Valbee VBG Owner's Manual

7. PRESENCE control
This is the ultra-high frequency equalizer. It boosts the level of the 7kHz region in a
range of 12dB.
8. VOLUME control
This adjusts the level of amplifier output.
9. VALVE POWERED PHONES / REC OUT jack
The 1/4" jack headphone output socket to enable headphones to be connected. If
headphones are used, sound will not be output from the built-in speaker.
You can also use this output jack as a line output to send the signal to your PA or
MTR. Since the line output is driven by the vacuum tube power amp, it will give you
the warm sound that is distinctive of tube amps.
Warning
You must turn the amp volume to 0 before you connect or disconnect the plug. Note
that the noise and distorted sound signals produced when inserting or removing the
plug with high volume levels will not only result in damage to the headphones or
other connected devices it may also result in damage to the user's hearing.
You should also be careful not to raise the volume excessively when using
headphone. Playing through headphones at a high volume for an extended period
may damage your hearing.

Troubleshooting

1. The power supply cannot be switched on.
- Plug the power cable all the way into the AC inlet (the power connector on the back
of the amp).
- Check that there is power at the AC outlet you are using (e.g., plug in another
device and turn it on).
2. The power supply can be switched on, but no sound is heard.
- Check to see if the volume on the amplifier is set to '0'.
- Check to see if the volume on the guitar is set to '0'.
- Make sure that the output of your guitar or effect processor is connected to the
INPUT jack.
- Remove the effects between the guitar and the amplifier and check to see if no
sound is produced.
- Make sure that the shielded cable between your guitar and amp is not broken. If
you have another cable, try using it.
3. Noise is heard.
- Check to see if the plug cover on the shielded cable is loose.
- Check to see if anything in the immediate vicinity is resonating or banging against
the amplifier to produce the noise.
10. STAND BY switch
This switch turns the output on/off (standby).
First turn on the power and allow the vacuum tubes to warm up sufficiently; then turn
this standby switch on.
When turning the power off, you must first turn this standby switch off (standby), and
then turn the power switch off.
11. POWER switch
The switch to turn the power supply on and off. Ensure that this switch is set at OFF
when the amplifier is not in use.
Warning
Before you turn on the power of the amp, make sure that each volume control is set
to 0. If you turn on the power when the volume controls are already raised, a sudden
loud noise may be produced, possibly damaging your hearing. Please use caution.
12. EFFECT SEND jack
This is an output jack for an effects device. Connect it to the input of your effects
device.
13. EFFECT RETURN jack
This is an input jack for an effects device. Connect the output of your effects device
to this input.
- If you are using any compact effect devices between your guitar and amp, try
removing all of them, and check whether the noise occurs when only the guitar and
amp are used.
- Make sure that the shielded cable between your guitar and amp is not broken. If
you have another cable, try using it.
- Make sure that the action (string height) of your guitar is adjusted correctly. If the
action is too low, the strings may buzz against the fingerboard, producing noise.
4. No sound is produced in the headphones
- Make sure that you are using stereo headphones and that they are correctly
connected.
In the case of defects
This product has passed exhaustive inspections before being shipped from the
factory. Ensure that the above procedures are carried out when a problem is thought
to exist.
If after checking these points you are still unable to identify the problem, please
contact the dealer where you purchased the amp.
Also, ensure that the symptoms of the problem are explained in detail when
requesting repair in order to facilitate swift handling.
Specifications are subject to change without notice.
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