Zoom G1 Service Manual page 7

12. Sound check 1
1) Connect AC adaptor and the units 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.
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.
14. Battery
1) Disconnect AC adaptor and set the power supply voltage to 6.0 V.
2) Make sure that "A0" is indicated on the 7 segment LED.
3) Set the power supply voltage to 3.7 V.
Make sure that the indication "bt" appears on the 7 segment LED.
4) Set the power supply voltage to 4.6 V.
Make sure that the 7 segment LED indication returns to the previous state.
15. Stability
Put the G1 on a surface plate, and push it diagonally.
Make sure that there is no remarkable space (less than ±0.3 mm is acceptable).
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