I bought a Line 6 Spider IV 15 amplifier in Tunisia, the problem is that after 20 days the amplifier no longer picks up my guitar, knowing that I used it in accordance with the instructions of use, I Brought back the amplifier to the dealer to benefit from the guarantee since it is manufacturing defect, and since I have no news and when I call the service concerned it tells me that we expect the manufacturer to send us the electronic diagram To be able to diagnose the amplifier, can you help me find this famous schema thanks.