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Troubleshooting
f you suspect a malfunction, please check the following points first. If this does
not resolve the problem, please contact your dealer or Korg authorized service
center.
1. Power does not turn on
• Is the AC adapter connected to the rear panel DC9V jack?
• Is the AC adapter plugged into an AC outlet?
• Could the AC adapter be damaged?
2. There’s no sound
• Is your bass turned up?
• Are both ends of your bass cable plugged into the correct jacks?
• Is your bass cable working?
• Could the rear panel OUTPUT LEVEL knob be turned down?
• Check the VOLUME, GAIN, BASS, MIDDLE, TREBLE, and PROG LVL settings.
For some amp models, you may not hear any sound from the amp if the BASS,
MIDDLE, and TREBLE settings are low; this is the same behavior as the cir-
cuitry of the original amp.
• Are there any effects turned down in volume?
• Could an expression pedal be at the minimum position with a parameter such
as DRIVE, LEVEL assigned to it?
• Could you have activated the Mute function? Defeat the Mute function as
explained in “Tuner (Bypass, Mute)” on p.21.
3. You can’t hear any effects even though they’re dialed in...
• Are the effect LEDs lit?
If an LED is dark, the corresponding effect is off.
Press the category select button to turn on the effect.
• Could the modulation “DEPTH” or the delay/reverb “MIX” be set to a low value?
Use the category select switch to select the effect, and turn the appropriate
value knobs to adjust the parameters.
• Could the effect be bypassed?
Defeat the Bypass function as explained in “Tuner (Bypass, Mute)” on p.21.
4. Sound is distorted when using SYNTH
• Lower the DRIVE/AMP VOLUME or the PROG LVL setting.
5. The sound connected to your bass amp is distorted, or
sounds wrong.
• Could “AMP/LINE” switch be set to “Ln” (LINE)?
• Could LEVEL be raised excessively?
→Make the appropriate settings as explained in “Basic connections” on p.12.
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