Panasonic SA-AK340GCP, Service Manual

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· The mechanism has "CHANGE WHILE PLAY" function. It open other trays for disc exchanging while one tray is at PLAY
position performing recording or reproducing.
·
The mechanism can quickly change all trays with "CHANGE ALL" function. All trays can be move to OPEN position with one
operation.
· There is no sensor to indicate presence of disc on any tray.
6.1.2. Hardware composition
· Below is the hardware components of the mechanism
Name Function
Open Switch (OPEN-SW) The switch is used to detect normal tray opening
The switch is used for detect tray being manually push/trigger when full open
Home Switch (HOME-SW) Is used to detect cam gear home position
Close Sensor (CLOSE-SENSOR) Used for normal single tray closing
Used to detect cam gear rotate to Play Driving position
Play Switch (PLAY-SW) Detect TRV clamping complete position
Stocking Switch (STOCK-SW) Detect tray completely transfer for play position to stocking position
UD Sensor (UD-SENSOR) Detect TRV vertical movement position
Top Switch (TOP-SW) Detect a default position of TRV vertical movement position
Driver IC To drive Motor
Motor Main driving source for changer
Plunger Switching the driving source from motor to:
1.
Tray open/close
2. Drive tray to play/stock position and TRV vertical movement
6.1.3. Mechanism Operation
· This mechanism has the following state:
1. Driving of a tray to open/close
2. Up/down operation of a traverse performs a state changes of tray.
By using the plunger to lift/release of a switching gear, and the cam gear to lift/release the function gear the motor can be link
to several gear trains to perform various operations.
· The functions that can be perform in this mechanism are described as below:
Condition Explanation
Open current playing tray The state to change current playing disc. All tray will be open at once and current tray at PLAY position
will be expose.
Open All The state where all trays being driven to OPEN position. The disc can be taken in or out from tray to tray
by close tray one by one from top to bottom.
Stock The state where the trays are stored in STOCK position
Play The state where one of the tray 5 trays is being driven to PLAY position and clamped by traverse unit
Play & Open Tray-* The state where one of the tray is in playing position performing recording or reproducing, other trays can
be used (OPEN position) for disc exchanging without stopping the recording or reproducing process.
Change The state when one of the opened tray being driven from OPEN position to STOCK position and other
opened trays remain still at OPEN position.
Close All The state where all open trays will being driven from OPEN position to STOCK position, one by one from
top to bottom
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SA-AK340GCP