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3.2 Bias adjustment
Adjust for trimmer potentiometers of MXH-40A
3.2.1 Preparations
1. Remove the expression pedal or set expression value to the maximum.
2. Turn o
ff
OVERDRIVE, EFFECT and UPPER VIBRATO.
3. To enable adjusting VR1,4,5 of MXH-40A by screw driver.
4. Minimize the VR2.
5. Power on and leave it for more than five minutes.
6. Enter to AMP/EFF
ˠ
TUBE screen from MENU.Then press
✄
✂
'
✁
◃
button and enter to the
right end item.
7. Press
✄
✂
'
✁
◃
button while pressing
✞
✝
☎
✆
RECORD button and enter to TUBE CALB1 screen.
Test sine wave is outputted.
8. Press
✄
✂
'
✁
◃
button again and enter to TUBE CALB2 screen.
3-5