Panasonic SA-AK640E, Service Manual

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· The timing chart for both positions is the same, motor rotate CW direction, until OPEN SW changing signal H
→
L
→
H, motor
need to continue run for 45ms.
· Motor free at the end of tray open, this is for enable the tray to be manually pushing by user.
· Below is the timing chart for tray opening.
· For all type of trays opening, either 4 trays (open remaining) or 5 trays (all open) will be set to OPEN position.
3.10.2. Tray Closing Operation
· The following action is tray closing. For this mechanism, there are 3 types of trays closing also.
1. All trays close
When user press "OPEN/CLOSE" after trays open, all trays (at any condition) will being driven to STOCK position.
2. Auto Tray Close
This closing operation is an internal operation in the mechanism. This operation completes the open selected tray function.
Mechanism uses this operation to drive trays that cover top surface of desire tray to STOCK position and then expose the
selected tray for user to do disc exchanging.
3. Change
When user press "CHANGE", one tray will be driven to STOCK position. This operation is for changing disc one by one from
top to bottom. The operation each time will only drive the upper most tray to STOCK position, it can be only being interrupt
by "OPEN/CLOSE". If the "CHANGE" being pressed during one tray is closing, mechanism will close the second tray
immediately after 1
st
tray. The number of tray will be closed equal to number time of "CHANGE button" being pressed.
· All trays close can occurs anytime when there is tray at open condition. The all trays close processing is used when mechanism
carry out the function as:
1. Close Tray 5
2. Close Tray 4 while tray 5 is in PLAY position
3. User press OPEN/CLOSE to instruct all trays close.
·
Mechanism will close all the trays by rotating cam gear at CCW direction until detect HOME position
·
Below is the timing chart for tray close (until detect HOME position).
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