Yamaha VIKING Owner's Manual page 61

4. Open the auxiliary DC jack cap, and then
insert the accessory power plug into the
jack.
1. Auxiliary DC jack cap
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1. Auxiliary DC jack
Maximum rated capacity for the auxiliary
DC jack:
DC 12 V, 10 A (120 W)
5. Turn the accessory on.
6. When the auxiliary DC jack is not being
used, cover it with the cap.
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