Shimano DENDOUMARU 4000HP Instruction Manual page 17

Let's try to do zero-setting.
More than
3 sec.
1
Adjust the hook to water surface, and
press 0-setting switch for more than 3
sec.
(Above drawing shows the Top Mode)
Beep beep
2
As shown above, the display has
changed.
3
When "0セット (0-set)" disappears, it
means 0-setting is complete.
17