Troubleshooting - Laboga Alligator AD 5200 Single User Manual

SYMPTOM
The amplifier doesn't play,
LED diodes aren't lit, control
light isn't lit.
There is smoke coming out of
the amplifier.
The amplifier doesn't play, but
LED diodes are lit.
Clean channel works, but the
distorted channel is mute.
The amplifier makes hum
even after turning Master
down.

TROUBLESHOOTING

RECOMMENDED INTERVENTION
Check if the main fuse isn't blown or if the power supply cord isn't
broken (use another). If it still doesn't help, contact Laboga service
personnel or any Laboga retailer.
Immediately unplug the amplifier from the mains outlet and
contact authorized Laboga service personnel or any Laboga retailer.
Don't repair it yourself.
Check if guitar cable is connected and if guitar cabinet works
properly. Then, check if guitar's volume potentiometer, Master or
other potentiometers having influence on amplifier's volume, aren't
mute.
If the above mentioned hints fail, unplug the amplifier from main
outlet, wait at least 1 minute and check if anode fuse isn't blown. If
the fuse is blown, change it for a new one, turn the amplifier on
again and observe the tubes for any unusual signs. If, after you
the change it, it blows again, contact authorized Laboga service or
any Laboga retailer.
If the fuse wasn't blown, put guitar cable to the Return socket at
the back of the amplifier and check if you can hear the guitar:
If you do, check if any of preamp tubes aren't broken by
•
swapping them. If there is still no result, contact authorized
Laboga service or any Laboga retailer.
If you can't hear the guitar, contact authorized Laboga
•
service or any Laboga retailer.
Check if Lead Gain or Lead Volume isn't mute. If not, unplug the
amplifier from the mains electric supply, wait for the tubes to cool
down, unscrew rear grate and change V2. If there are no results,
contact authorized Laboga service or any Laboga retailer.
Check if the outer metal cover in any of the power tubes is glowing
red (it is usually grey). If yes, immediately turn the amplifier off
and contact authorized Laboga service or any Laboga retailer.
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