Panasonic Crs 1 Service Manual

							 1 Mechanism Overview 3
 2 Mechanism Drive Unit 
4
 2.1. Tray Open/Close and Multi-DiscsChange operations 
4
 2.2. Disc Selection operation 
5
 2.3. Play/Stop operation 
7
 3 Mechanism Operation Description 
9
 3.1. General Feature 
9
 3.2. Hardware composition 
9
 3.3. Mechanism Operation 
9
 3.4. Switches Chattering Check 
12
 3.5. Motor Movement Control 
12
 3.6. Plunger Timing Chart 
12
 3.7. Initialization of Mechanism Unit. 
15
 3.8. Mechanism HOME position 
16
 3.9. Mechanism Play Driving position 
17
 3.10. Trays Operation 
18
 3.11. Drive tray between STOCK and PLAYposition 
25
 3.12. Selection ofTray byMoving UD base Up/down 
26
 3.13. Fail Safe 
29
 3.14. Manual TriggerTrayClose 
30
 3.15. Changer Error Code 
31
 4 Self diagnosis and special mode setting 
32
©2005 Matsushita Electric Industrial Co. Ltd.. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
CRS1
 4.1. Special Mode Table 32
 4.2. Error code Table 
34
 5 Troubleshooting Explorer  
38
 5.1. Preparation of service jig 
38
 5.2. Checking of Changer Unit 
38
 5.3. Setting the trays in STOCK position 
38
 6 Flow Chart 
49
 6.1. Disassembly Flow Chart 
49
 6.2. Assembly Flow Chart 
50
 6.3. Disassembly Flow 
51
 7 Assembling and Disassembling Procedure. 
53
 7.1. Disassembling Procedures 
53
 7.2. Assembling Procedure 
73
 8 CRS1 (Changer Unit) Ageing / Reliability  
93
 8.1. Equipments 
93
 9 Notes of Schematic Diagram 
94
 10  Schematic Diagram 
95
 10.1. CD Loading Circuit 
95
 11  Printed Circuit Board 
96
 11.1. CD Loading P.C.B. 
96
 12  Exploded Views 
97
 12.1. CD Loading Mechanism 
97
Mechanism Unit
CONTENTS
 Page  Page
ORDER NO. MD0509368C0
A6 
						

							 13  Replacement Parts List 100
 13.1. CD Loading Mechanism Parts List 
101 13.2. Electrical Parts List 
102
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							1 Mechanism Overview
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							2 Mechanism Drive Unit
2.1. TrayOpen/Close and Multi-Discs Change operations
2.1.1. Description of tray open/close and multi-discs change operations
 1. The motor turns in the clockwise direction and the rotation is transmitted via the belt, thepulley gear also turns clockwise.
 2. The relay gear 1 turns counterclockwise.
 3. The relay gear 2 turns clockwise.
 4. The relay gear 3 turns counterclockwise.
 5. The switching gear at down position turns clockwise (up/down position functioned by the plunger lever).
 6. The main drive gear turns counterclockwise.
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							 7. The cam gear turns clockwise, which is engaged with the trigger gear and slide plate, are driven, causes the tray lock lever
unlock.
 8. The tray relay gear turns counterclockwise, which is engaged with the OC assy, is driven.
 9. The movement of the OCassy releases the disc trays.
(The operation of the disc trays closed is the opposite of that for opening of disc trays.)
2.2. Disc Selection operation
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							2.2.1. Description of disc selection operation
Note: Check that the cam gear is in “HOME” position.
 1. The motor turns in the clockwise direction and the rotation is transmitted via the belt, thepulley gear also turns clockwise.
 2. The relay gear 1 turns counterclockwise.
 3. The relay gear 2 turns clockwise.
 4. The relay gear 3 turns counterclockwise..
 5. The switching gear move up turns clockwise (up/down position functioned by the plunger lever).
 6. The long gear turns counterclockwise.
 7. The function gear moved up turns clockwise.
 8. The UD gear 1 turns counterclockwise.
 9. The UD gear 2 turns clockwise engaged with the UD rack R drives the UD connection lever turns clockwise, UD rack L, is driven
to move the traverse deck assembly up.
(The operation of the traverse deck assembly down is the opposite of that for the traverse deck assembly up.)
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							2.3. Play/Stop operation
2.3.1. Description of play/stop operation
Note: Check that the Lock Lever 1 is unlock.
 1. The motor turns in the clockwise direction and the rotation is transmitted via the belt, thepulley gear also turns clockwise.
 2. The relay gear 1 turns counterclockwise.
 3. The relay gear 2 turns clockwise.
 4. The relay gear 3 turns counterclockwise.
 5. The switching gear move up turns clockwise (up/down position functioned by the plunger lever).
 6. The long gear turns counterclockwise.
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							 7. The function gear move down turns clockwise.
 8. The play gear 1 turns counterclockwise.
 9. The play gear 2 turns clockwise engaged with the tray driverack and tray catch lever to push in the disc trays.
 10. Play lever B engaged with the traverse deckassembly’s play lever A, causes slide platemove towards to theplay position.
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							3 Mechanism Operation Description
3.1. General Feature
 
    · 
    This is a five disc changer mechanism for CD/DVD. The outline figure is shown below.
 
    · 
    The mechanism hasCHANGE WHILE PLAYfunction. It open other trays for disc exchan ging while one tray is at PLAY
position performing recording or reproducing.
 
    · 
    The mechanism can quickly change all trays withCHANGE ALLfunction. All trays can be move to OPEN position with one
operation.
 
    · 
    There is no sensor to indicate presence of disc on any tray.
3.2. Hardware composition
 
    · 
    Below is the hardware components of the mechanism
NameFunction
Open Switch (OPEN-SW)The switch is used to detect normaltrayopening
The switch is used for detect traybeing 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 singletrayclosing
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 completelytransfer for play position to stocking positi
UD Sensor (UD-SENSOR)Detect TRV vertical movement position
Top Switch (TOP-SW)Detect a default position of TRV vertical movement position
Driver ICTo drive Motor
MotorMain driving source for changer
PlungerSwitching the driving source from motor to:
 1. Trayopen/close
 2. Drive tray to play/stockposition and TRV vertical movemen
3.3. 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:
ConditionExplanation
Open current playing trayThe state to change current playing disc. Alltray will be open at once and current tray at PLAYposition
will be expose.
Open AllThe state where all traysbeing driven to OPEN position. The disc can be taken in or out fromtray to tray
by close tray one by onefrom top to bottom.
StockThe state where the trays are stored in STOCK position
PlayThe state where one of the tray 5 trays isbeing driven toPLAY position and clamped by traverse unit
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							ConditionExplanation
Play & Open Tray-*The state where one of the tray is in playingposition performing recording or reproducing, other trays can
be used (OPEN position) for disc exchanging without stopping the recording or reproducing process.
ChangeThe state when one of the openedtraybeing driven from OPEN position to STOCK position and other
openedtrays remain still at OPEN position.
Close AllThe state where all opentrays willbeing driven from OPEN position to STOCK position, one by one from
top to bottom
Note:* represent traynumber (from 1 ~ 5)
 
    · 
    Logics of motor control:
ActionCWCCWPlunger
TrayOpeningHLL
TrayClosingLHL
Cam move from Home Position to Play Driving PositionHLL
Cam move from Play Driving Position to Home PositionLHL
Drive tray to PLAYpositionHLH
Drive tray to STOCKpositionLHH
UD base moving upwardHLH
UD base moving downwardLHH
Notes :
CW/CCW :Motor direction control (CW : clockwise, CCW : Anti-clockwise)
Plunger : Solenoid Control (H : ON = Activation)
 
    · 
    Cam gear in the mechanism use for openin g/closing of trays and lifting a function gear to link to gear train that drive UD base
moving up/down.When camgear is being driven to play driving position, the function gear will be bring down to link the gear
train that drive tray to andfrom STOCK position andPLAY position. Below are the relation between mechanism function and
cam gear movement and position
Motor DirectionPlunger UnitCam gear movement/positionFunction
CWReleaseHome SW→rotate CWTrays Open
CCWReleaseRotate CCW→Home SWTrays Close
CWReleaseHome SW→close sensor 1st L-H signalCam gear move from Home Position to Play
Driving Posi
CCWReleaseClose sensor 1st (H→L) signal→Home SWCam gear move from Play Driving Position to
Home Position
CWUpCam Stop at Home PositionUD base moving from bottom to top
CCWUpCam Stop at Home PositionUD base moving from top to bottom
CWUpCam Stop at Play Driving PositionTray movefrom STOCK toPLAY position
CCWUpCam Stop at Play Driving PositionTray movefromPLAY position to STOCK
Position
 
    · 
    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 isonly 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.
Cam Gear
MotorHome Position (UD Driving Position)Play Driving Position
CWUD base move upwards direction 5→1Stock→Play
CCWUD base move downwards direction 1→5Play→Stock
 
    · 
    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:
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