Panasonic CRS1 User manual

1 Mechanism Overview 3
2 Mechanism Drive Unit 4
2.1. Tray Open/Close and Multi-Discs Change 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 PLAY position 25
3.12. Selection of Tray by Moving UD base Up/down 26
3.13. Fail Safe 29
3.14. Manual Trigger Tray Close 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. Tray Open/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, the pulley 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 OC assy 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, the pulley 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, the pulley 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 drive rack and tray catch lever to push in the disc trays.
10. Play lever B engaged with the traverse deck assembly’s play lever A, causes slide plate move towards to the play 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 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.
3.2. 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 positi
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 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:
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
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Condition Explanation
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
Note: * represent tray number (from 1 ~ 5)
· Logics of motor control:
Action CW CCW Plunger
Tray Opening H L L
Tray Closing L H L
Cam move from Home Position to Play Driving Position H L L
Cam move from Play Driving Position to Home Position L H L
Drive tray to PLAY position H L H
Drive tray to STOCK position L H H
UD base moving upward H L H
UD base moving downward L H H
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 Plunger Unit Cam gear movement/position Function
CW Release Home SW →rotate CW Trays Open
CCW Release Rotate CCW →Home SW Trays Close
CW Release Home SW →close sensor 1st L-H signal Cam gear move from Home Position to Play
Driving Posi
CCW Release Close sensor 1st (H →L) signal →Home SW Cam gear move from Play Driving Position to
Home Position
CW Up Cam Stop at Home Position UD base moving from bottom to top
CCW Up Cam Stop at Home Position UD base moving from top to bottom
CW Up Cam Stop at Play Driving Position Tray move from STOCK to PLAY position
CCW Up Cam Stop at Play Driving Position Tray move from PLAY 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 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.
Cam Gear
Motor Home Position (UD Driving Position) Play Driving Position
CW UD base move upwards direction 5→1 Stock →Play
CCW UD 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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· 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 opening 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 opening and closing flow.
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3.4. Switches Chattering Check
· Each input shall perform chattering check processing.
OPEN-SW 2ms Periodic sampling. It logic-decides by continuation same 5 times.
PLAY-SW 2ms Periodic sampling. It logic-decides by continuation same 5 times.
STOCK-SW 2ms Periodic sampling. It logic-decides by continuation same 5 times.
TOP-SW 2ms Periodic sampling. It logic-decides by continuation same 5 times.
HOME-SW 2ms Periodic sampling. It logic-decides by continuation same 5 times.
UD-SENSOR 2ms Periodic sampling. It logic-decides by continuation same 5 times.
CLOSE-SENSOR 2ms Periodic sampling. It logic-decides by continuation same 5 times.
3.5. Motor Movement Control
Condition Motor
CW CCW
Free L L
Rotate CW H L
Rotate CCW L H
Short Brake H H
3.6. Plunger Timing Chart
· Plunger is use for pulling the lever that a switching gear is sit on the lever. When current supply to the plunger to pulling (kick)
switching gear, it will be lift up to engage to 1st gear train. When current supply to plunger is cut off (release), switching gear will
be bring done by gravity force and mechanical coil spring on top of it. Plunger use for connect the driving source from 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 vertical movement
· The plunger movement is define as below:
Kick = H, Release= 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.
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· The basic concept of the motor rotation sequence (CW or CCW) is base on the initial and final motor rotating direction. The
direction should be opposite 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 the type of motor short rotation direction is as below:
Motor Direction Initial Short Rotate Direction Final Switching Mode
1st 2nd 3rd
Plunger Kick CW CCW CW CCW CW A
CCW CW -CCW B
CCW CW CCW -CW C
CW CCW CW CCW D
Plunger Release CW CCW CW CCW CW E
CCW CW -CCW F
CCW CW CCW -CW G
CW CCW CW CCW H
· Below are the timing charts of plunger activation time.
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· As the plunger only activate at 2 position of cam gear. The plunger mode summary as below:
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Switching
Position
Initial Motor Direction Switching
Mode
Initial Motor Direction Function
Home
Position
Cam gear rotate CCW to HOME
Motor : CCW
CUD base move from bottom to top
Motor : CW
Tray selection from bottom
to top
Cam gear rotate CCW to HOME
Motor : CCW
DUD base move from top to bottom
Motor : CCW
Tray selection from top to
bottom
UD base move from bottom to top
Motor : CW
ECam gear rotate CW from HOME to
Play Driving Position. Motor : CW
After tray selection, cam
gear rotate to Play Driving
Position
UD base move from top to bottom
Motor : CCW
GCam gear rotate CW from HOME to
Play Driving Position. Motor : CW
After tray selection, cam
gear rotate to Play Driving
Position
Play
Driving
Position
Cam gear rotate CW from HOME to Play
Driving Position. Motor : CW
ADrive tray from STOCK position to
PLAY position. Motor : CW
Load tray to Play
Cam gear rotate CW from HOME to Play
Driving Position. Motor : CW
BDrive tray from PLAY position to
STOCK position. Motor : CCW
Unload tray from Play to
Stock
Drive tray from STOCK position to PLAY
position. Motor : CW
FCam gear rotate CCW from Play
Driving Position to HOME. Motor : CCW
After load tray to Play, cam
gear return to HOME
Drive tray from PLAY position to STOCK
position. Motor : CCW
HCam gear rotate CCW from Play
Driving Position to HOME. Motor : CCW
After unload tray from Play,
cam gear return to HOME
Drive tray from PLAY position to STOCK
position. Motor : CCW
GCam gear rotate CW from until trays full
open. Motor : CW
Open trays while one tray
Play
· Switching mode G is used during initialization to ensure that the switching gear is at the release (down) condition before the
initialization process begins.
3.7. Initialization of Mechanism Unit.
· Mechanism Initialization -- This mechanism is designed to operate & set to a pre-defined position to prevent malfunction when
unavoidable circumstances happen. For examples: user mis-handling during transportaion or abnormal user operations.This is
comply to the product shipping reliability standards.
· Mechanism is initialized when the mechanism controller is unable to detect the present condition/state 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. Plunger lever at release condition
5. Cam gear is at Home position ( HOME SW-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 initialization process:-
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3.8. Mechanism "HOME" position
· Mechanism HOME position is a starting position for few functions, such as below:
1. Load tray from STOCK position to PLAY position
2. Unload tray from PLAY 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 base movement
· There are 2 type of mode to go to HOME position.
Mode 1 is to go to HOME position and motor brake and stay 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.
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GO HOME MODE 1 GO HOME MODE 2
1. After loading tray to PLAY position 1. After closing all trays (no tray at PLAY position)
2. After unloading tray to STOCK position
3. After closing all trays (one tray at PLAY position)
· 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 position from HOME position, and after the completion of clamping process will
back to HOME position.
For Go to Play Driving position, cam gear move from HOME position, motor brake after detect 1st time CLOSE sensor signal
change from H→L
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· 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 "Change 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. When "DISC CHANGE" is
pressed, the upper most tray will close while "OPEN/CLOSE" is close all trays.
2. Open selected tray while one tray at PLAY position
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.
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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 1st 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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· 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.
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