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3.13. Fail Safe
· Fail safe function is for purpose of recovery of tray movement if the mechanism is not able to carry out tray open or close within
a specified time.
Fail safe 1: Tray can not open: Fail safe - move all trays to home position
Fail safe 2: Tray can not close: Fail safe - move to next close sensor transition position
Note : For Fail safe 2 :
1. If done on tray 1 - will fully go to Open position because OC gears are fully engaged
2. If done on either one of the remaining trays (2, 3, 4 & 5) - will only release the gear engagement and leave the tray at free
condition, tray can only open manually by user.
After fail safe, any subsequent button pressed on main set, the mechanism must follow "GO HOME" flowchart.
· Fail safe flow chart are shown as below:
29
CRS1
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