Zoom G1 X Four, Руководство по обслуживанию

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11. Restoring Factory Defaults
1) Power on in normal mode.
If 7segment LED doesn't blink “AL", power on pressing the "STORE" key.
Note) If someone make the operation below, after that 7segment LED never show "AL"
2) Make sure that display blinks “AL”
3) Press [STORE] key (SW3) and display indicates “ok”.
4) The units automatically reboot in normal mode.
12. Sound check 1
1) Connect AC adaptor and the unit’s power on.
2) Make sure that display indicates [A0].
3) Press the FOOT SWITCH [^] (SW5) two times and make sure that display changes
to [A2].
4) Input sine wave (440Hz, -20dBm).
5) Monitor output sound by speaker or oscilloscope and make sure the points below.
Output sound is distorted.
Sound doesn’t include abnormal noise, and this sound isn’t abnormal sound.
6) Make sure that frequency of 1 Octave change by moving the EX-PEDAL.
13. Sound check 2
1) Press the FOOT SWITCH [v] (SW4) and make sure that display changes to [A1].
2) Input sine wave (440Hz, -20dBm)
3) Monitor output sound by speaker or oscilloscope and make sure the points below.
Output sound is modulated.
Sound doesn’t include abnormal noise, and this sound isn’t abnormal sound.
4) Add mechanical shock to the units a few times and make sure there are no any
problem like noise or sound stop.