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Troubleshooting
Depending on what is the problem with device, you should perform a few electronic tests in proper order to solve your problem.
Each time when one of tests is failed, you should exchange or repair necessary parts, run again that test that was failed before
and, if this time test is approved, connect all device parts back together and try if unit is now working properly. If not, run next
test from the list.
No LED, no sound:
1. Check voltage in you AC outlet, check power cord of amp.
2. Disassembly amp.
3. Perform transformer test.
4. Perform power supply test.
LED ok, but no sound:
1. Try to use different instrumental cable and/or different guitar. Try to unplug guitar and touch tip of cable, you
should hear noise in speaker.
2.Take short instrumental cable, insert it to the Send and Return jacks on the rear panel. Try also to connect guitar
to the return input instead of normal inputs (in that case only Volume potentiometer works). If any of this helps,
then you should perform preamp test.
3. Disassembly amp.
4. Perform power supply test.
5. Perform power amp.
6. Perform preamp test.
Volume level seems to be not enough:
1. Disassembly amp.
2. Perform power supply test.
3. Perform power amp test.
Sound quality is poor:
1. Try to use different instrumental cable and/or different guitar.
2. Disassembly amp.
3. Try to use different speaker and high frequency driver.
4. Perform preamp test.
5. Perform power amp test.
Sound is distorted:
1. Try to use different guitar.
2. Disassembly amp.
3. Perform power amp test.
4. Try to use different speaker and high frequency driver.
5. Perform preamp test.
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