Panasonic Crs 1 Service Manual

							 
    · 
    To drive the tray(s) between STOCK/PLAY position, cam gear must be at the play driving position and plunger need to be
activated, the switch and state change is as figure below:
 
    · 
    The mechanism tray openin g and closing is cycle process. It is able to open all trays in STOCK position while one of the tray
is in PLAY position. The closing can be done one by one or close all at once depend on the user instruction. Below show the
tray openin g and closing flow.
11
CRS1 
						

							3.4. Switches Chattering Check
 
    · 
    Each input shall perform chattering check processing.
OPEN-SW2ms Periodic sampling. It logic-decides by continuation same 5 times.
PLAY-SW2ms Periodic sampling. It logic-decides by continuation same 5 times.
STOCK-SW2ms Periodic sampling. It logic-decides by continuation same 5 times.
TOP-SW2ms Periodic sampling. It logic-decides by continuation same 5 times.
HOME-SW2ms Periodic sampling. It logic-decides by continuation same 5 times.
UD-SENSOR2ms Periodic sampling. It logic-decides by continuation same 5 times.
CLOSE-SENSOR2ms Periodic sampling. It logic-decides by continuation same 5 times.
3.5. Motor Movement Control
ConditionMotor
CWCCW
FreeLL
Rotate CWHL
Rotate CCWLH
Short BrakeHH
3.6. Plunger Timing Chart
 
    · 
    Plunger is use for pulling the lever that a switching gear is sit on the lever.Whencurrent supply to the plunger to pulling(kick)
switching gear, it will be lift up to engage to 1stgear train.Whencurrent supply to plunger is cut off (release), switching gear will
be bring done by gravity force and mechanical coil spring on top of it. Plunge r use for connect the driving sourcefrom motor
to 2 different gear train in the mechanism, the functions of the gear trains are as below:
 1. Tray open/close
 2. Drive tray to play/stock position and TRV verticalmovement
 
    · 
    The plunger movement is define as below:
Kick = H, Releas e= L
 
    · 
    Each time during plunger activation time (Kick/Release ), the motor shall perform a short time CW and CCW rotation for release
the gear side force and ensure complete gear to gear engagement.
12
CRS1 
						

							 
    · 
    The basic concept of the motor rotation sequence (CW orCCW) isbase on the initial and final motor rotating direction. The
direction should be opposi te to the initial and final motor driving direction in order to:
 1. To release the gear teeth side force
 2. To release mechanism belt tension
 3. To ensure switching gear disengage or engage into other gear´s teeth
 
    · 
    Summary of thetype ofmotor short rotation direction is as below:
Motor DirectionInitialShort Rotate DirectionFinalSwitching Mode
1st2nd3rd
Plunger KickCWCCWCWCCWCWA
CCWCW-CCWB
CCWCWCCW-CWC
CWCCWCWCCWD
Plunger ReleaseCWCCWCWCCWCWE
CCWCW-CCWF
CCWCWCCW-CWG
CWCCWCWCCWH
 
    · 
    Below are the timing charts of plunger activation time.
13
CRS1 
						

							 
    · 
    As the plunger only activate at 2 position of cam gear. The plunger modesummary as below:
14
CRS1 
						

							Switching
PositionInitial Motor DirectionSwitching
ModeInitial Motor DirectionFunction
Home
PositionCam gear rotate CCW to HOME
Motor :CCWCUD base move from bottom to top
Motor :CWTrayselection from bottom
to top
Cam gear rotate CCW to HOME
Motor :CCWDUD base move from top to bottom
Motor :CCWTray selection from top to
bottom
UD base move from bottom to top
Motor :CWECam gear rotate CW from HOME to
Play Driving Position. Motor :CWAfter tray selection, cam
gear rotate to Play Driving
Position
UD base move from top to bottom
Motor :CCWGCam gear rotate CW from HOME to
Play Driving Position. Motor :CWAfter tray selection, cam
gear rotate to Play Driving
Position
Play
Driving
PositionCam gear rotate CW from HOME to Play
Driving Position. Motor :CWADrive trayfrom STOCK position to
PLAY position. Motor :CWLoadtray to Play
Cam gear rotate CW from HOME to Play
Driving Position. Motor :CWBDrive trayfromPLAY position to
STOCK position. Motor :CCWUnloadtrayfrom Play to
Stock
Drive trayfrom STOCK position toPLAY
position. Motor :CWFCam gear rotate CCW from Play
Driving Position to HOME. Motor :CCWAfter loadtray to Play, cam
gear return to HOME
Drive trayfromPLAY position to STOCK
position. Motor :CCWHCam gear rotate CCW from Play
Driving Position to HOME. Motor :CCWAfter unloadtrayfrom Play,
cam gear return to HOME
Drive trayfromPLAY position to STOCK
position. Motor :CCWGCam gear rotate CW from until traysfull
open. Motor :CWOpen trays while one tray
Play
 
    · 
    Switching mode G is used during initializ ation to ensure that the switching gear is at the release (down) condition before the
initializ ation process begins.
3.7. Initialization of Mechanism Unit.
 
    · 
    Mechanism Initialization-- This mechanism is designed to operate & set to a pre-defined position to prevent malfun ction when
unavoidable circumstances happen. For examples: user mis-handlin g during transportaion or abnormal user operations.Th is is
comply to the product shippin g reliability standards.
 
    · 
    Mechani sm is initializ ed when the mechanism controller is unable to detect the present condition/stat e of mechanism. For
example, when the microcomputer carries out a cold start. (In complete unit)
 
    · 
    Once the initialization process is completed, the mechanism unit is set to this condition:-
 1. Tray 1 is at PLAY position (Top tray)
 2. The traverse unit is at clamping condition (PLAY SW-L)
 3. All the remaining trays are in STOCK Position (Trays 2 ~ 5 )
 4. Plunge r lever at release condition
 5. Cam gear is at Home position ( HOMESW-L)
 6. Motor is free(CW-L, CCW-L)
Note: This is same as shipment condition. (In complete unit)
 
    · 
    Below is the flow chart of the initializ ation process:-
15
CRS1 
						

							3.8. Mechanism HOME position
 
    · 
    Mechani sm HOME position is a starting position for few functions, such as below:
 1. Load trayfrom STOCK position toPLAY position
 2. Unload trayfromPLAY position to STOCK position
 3. Open trays
 4. Driving UD base up/down
 
    · 
    Besides this, it will always return to “HOME” position after performing below functions:
 1. After tray completely clamped by Traverse unit
 2. Closing All trays
 3. Closing tray 5
 4. After completely the UD basemovement
 
    · 
    There are 2 type of mode to go to HOME position.
Mode 1 is to go to HOME position and motor brake andstay at HOME position,motor need longer brake time for reduce overrun
of mechanical parts.
For Mode 2, after mechanism go to HOME position, motor immediately rotate reverse direction to go do loading /unloading
processing, shorter brake time necessary to reduce the total mechanism operation time.
The table below is types of GO HOME mode and operation that use it.
16
CRS1 
						

							GO HOME MODE 1GO HOME MODE 2
1. After loadingtray to PLAYposition1. After closing all trays (notray at PLAYposition)
2. After unloadingtray to STOCKposition
3. After closing all trays (onetray at PLAYposition)
 
    · 
    The timing chart for the mechanism to set to “HOME” position is illustrated as below.
 
    · 
    Below is the flow chart for the mechanism to set to “HOME” position.
3.9. Mechanism Play Driving position
 
    · 
    Play driving position is a position driving source linkage to drive the tray(s) between STOCK position and PLAY position (load
and unload of tray). Cam gear will rotate to this positionfromHOME position, and after the completion of clamping process will
back to HOME position.
For Go to Play Driving position, cam gearmove fromHOME position, motor brake after detect 1
sttime CLOSE sensor signal
change from H→L
17
CRS1 
						

							 
    · 
    Below is the flow chart for the mechanism to set PLAY DRIVING position.
3.10. Trays Operation
3.10.1. Tray ‘Open’ Operation
 
    · 
    Changer mechanisms are required to open trays to load a disc. This mechanism features an All Open or Chang e all one by
one function for quick & easy disc change. There are 3 kinds of Tray Open conditions.
 1. All trays open
Occurs when OPEN/CLOSE button is pressed, playing tray will be driven to STOCK position and all trays will driven to
OPEN position. All trays will remain open until DISC CHANGE or OPEN/CLOSE is pressed.WhenDISC CHANGE is
pressed, the upper most tray will close while OPEN/CLOSE is close all trays.
 2. Open selected traywhile onetray at PLAYposition
Occurs when specify tray is selected to be opened while one tray is at PLAY position. This operation never disturbs the
playing disc operation and allow user to change desire disc on specific tray.
 3. Direct open playing tray
Occurs only when the user selects to open playing tray. Tray at PLAY position will stop recording/reproducing process and
being driven to STOCK position. This will follow by driven all trays to OPEN position and trays closing until the previous
playing tray expose for disc changing.Example: User press DISC CHANGE + DISC 3. Mechanism opens all the trays,
then closes trays 1 & 2 respectively exposing the tray 3.
18
CRS1 
						

							 
    · 
    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 manua lly pushin g by user.
 
    · 
    Below is the timing chart for tray openin g.
 
    · 
    For all type of trays openin g, 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
Whenuser 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 exchan ging.
 3. Change
Whenuser press CHANGE, one tray will be driven to STOCK position. This operation is for changing disc one by onefrom
top to bottom. The operation each timewill only drive the upper most tray to STOCK position, it can be only being interrupt
by OPEN/CLOSE. If the CHAN GE being pressed during one tray is closing, mechanism will close the second tray
immediately after 1
sttray. The numbe r of tray will be closed equal to numbe r 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.
 
    · 
    Mechani sm 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).
19
CRS1 
						

							 
    · 
    Table below explain the function of open selected tray while one tray at PLAY position. This table indicated the possible tray
at playing trays. For opened tray, all trays will be open except the tray at PLAY position. Trays will close to expose the selected
tray for user to input or change the disc.
 
    · 
    Timing chart below, shown an example of user select to open tray 4 only.
20
CRS1