How to Unlock a Pachislo Slot Machine Door

I have a Yamasa Planet 999 machine and am getting an error code E-0 The manual says push the button at the token slot I have done that

BIG BONUS 2003 MEPHISTO PACHISLO SLOT MACHINE BY YAMASA views · 13

mega999 slot Rare Slot ! Neo Planet T EL-Vision Token Slot Machine 2002 Pachislo L display was

king treasure slot Operating instructions for getting started with the Pachislo slot machine at “Sunsets on Bass Cove