Panasonic CRS1 Service Manual page 10

CRS1
Condition
Play & Open Tray-*
Change
Close All
Note: * represent tray number (from 1 ~ 5)
· Logics of motor control:
Tray Opening
Tray Closing
Cam move from Home Position to Play Driving Position
Cam move from Play Driving Position to Home Position
Drive tray to PLAY position
Drive tray to STOCK position
UD base moving upward
UD base moving downward
Notes :
CW/CCW : Motor direction control (CW : clockwise, CCW : Anti-clockwise)
Plunger : Solenoid Control (H : ON = Activation)
· Cam gear in the mechanism use for opening/closing of trays and lifting a function gear to link to gear train that drive UD base
moving up/down. When cam gear is being driven to play driving position, the function gear will be bring down to link the gear
train that drive tray to and from STOCK position and PLAY position. Below are the relation between mechanism function and
cam gear movement and position
Motor Direction
CW Release
CCW Release
CW Release
CCW Release
CW Up
CCW Up
CW Up
CCW Up
· Cam gear rotation direction, switch and state changes is show in figure below:
· The movement of UD base (vertical up/down) and driving of tray(s) between STOCK position and PLAY position is only enable
when plunger ON (lift up the switching gear to link driving source to the both gear train). Only one gear train can be driven at
one time, the selection of either gear train is depending on cam gear position. Below are figure showing the operation of motor
driving direction and its function carry out.
Motor
CW
CCW
· For driving UD base up/down the cam gear must be at the home position (UD driving position) and plunger need to be
activated, the switch and state change is as figure below:
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.
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.
The state where all open trays will being driven from OPEN position to STOCK position, one by one from
top to bottom
Action
Plunger Unit Cam gear movement/position
Home SW → rotate CW
Rotate CCW → Home SW
Home SW → close sensor 1st L-H signal
Close sensor 1st (H → L) signal → Home SW Cam gear move from Play Driving Position to
Cam Stop at Home Position
Cam Stop at Home Position
Cam Stop at Play Driving Position
Cam Stop at Play Driving Position
Home Position (UD Driving Position)
UD base move upwards direction 5→1
UD base move downwards direction 1→5
Explanation
CW CCW
H
L
H
L
H
L
H
L
Function
Trays Open
Trays Close
Cam gear move from Home Position to Play
Driving Posi
Home Position
UD base moving from bottom to top
UD base moving from top to bottom
Tray move from STOCK to PLAY position
Tray move from PLAY position to STOCK
Position
Cam Gear
Play Driving Position
Stock → Play
Play → Stock
10
Plunger
L L
H L
L L
H L
L H
H H
L H
H H