3DTC. 3 Disc Tray Changer CLASS 1 LASER PRODUCT. Table of Contents

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Disc Tray Changer DTC Table of Contents Warning - ESD... Wiring... Brief description...4 Truth table...6 Timing Diagram...7 Repair Tips Replacing the CD Drive... Jammed carriage, blocked tray.

1 Disc Tray Changer DTC Table of Contents Warning - ESD... Wiring... Brief description...4 Truth table...6 Timing Diagram...7 Repair Tips Replacing the CD Drive... Jammed carriage, blocked tray... Replacing the gears...5 Exploded view... Copyright Philips Consumer Electronics B.V. Eindhoven, The Netherlands All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior permission of Philips. CLASS LASER PRODUCT Published by HB 48 Service Audio Printed in The Netherlands Subject to modification

The following steps have to be done when replacing the CD mechanism:. Disconnect flexfoil from old CD drive. Put a paperclip over contacts of flexfoil to short-circuit the contacts (fig.).

2 WARNING CHARGED CAPACITORS ON THE SERVO BOARD MAY DAMAGE THE CD DRIVE ELECTRONICS WHEN CONNECTING A NEW CDM MECHANISM. THAT S WHY, BESIDES THE SAFETY MEASURES LIKE SWITCH OFF POWER SUPPLY ESD PROTECTION ADDITIONAL ACTIONS MUST BE TAKEN BY THE REPAIR TECHNICIAN. The following steps have to be done when replacing the CD mechanism:. Disconnect flexfoil from old CD drive. Put a paperclip over contacts of flexfoil to short-circuit the contacts (fig.). Remove old CD drive 4. Remove paperclip from flexfoil 5. Connect flexfoil to new CD drive 6. Remove ESD-protection (solder joint) from laserunit (see below) 7. Position new CD drive in its studs fig. Attention: The laser diode of this CD drive is protected against ESD by a solder joint which shortcircuits the laserdiode to ground. For proper functionality of the CD drive this solder joint must be removed after connection the drive to the set.

3 WIRING Module WIRING CD Drive

The drawer closed Carriage # is in Play position Carriage # and # are in home position Clamper Carriage

4 4 Brief description On the next pages various actions of the Disc Tray Changer are described with simplified drawings.. Initial state. After Power on the changer is in this position. The drawer closed Carriage # is in Play position Carriage # and # are in home position Clamper Carriage Drawer The Changer looks like. Tray open. The Drawer is moved out Carriage # and # remain in home position Clamper Carriage Drawer The Changer looks like

5 . Carriage extra. This position is necessary to get access to the lower carriage. It is also used during disc change. 5 Carriage extra position Clamper Carriage Drawer The changer looks like The various states are recognized by seven switches. For functions see truth table on next page. Location of switches SW4&5 SW& SW6 SW7 SW8

6 Truth Table Slider reverse recognition Slider forward recognition Drawer closed recognition No carriage under clamper Carriage # under clamper Carriage # under clamper Carriage # under clamper Carriage home recognition Carriage extra recognition X X X X X X X X X SW 8 Function SW 7 SW 6 SW 5 SW 4 SW SW - Q Q Q Q Q4 Q5 Q6 Q7 Register output / Switch 6

7 7 Timing Diagrams. Open # ACTION press open # initial final Carriage # to extra position Drawer opens prepare for next action Action Recognition Carriage motor Drawer motor Switches CCW STOP CW CCW STOP CW SW SW SW 4 SW 5 SW 6 SW 7 SW 8 duty cycle 5% (brake) Time ms/div. Close # ACTION press close initial final Carriage # to home position Drawer closes prepare for next action Action Recognition Carriage motor Drawer motor Switches CCW STOP CW CCW STOP CW SW SW SW 4 SW 5 SW 6 SW 7 SW 8 duty cycle 5% (brake) Time ms/div

8 8. Select # ACTION select # initial final clamper up carriage# to play position clamper down Action Recognition Carriage motor Drawer motor Switches CCW STOP CW CCW STOP CW SW SW SW 4 SW 5 SW 6 SW 7 SW 8 Time ms/div 4. Select # ACTION select # initial final clamper up carriage# to play position clamper down Action Recognition Carriage motor Drawer motor Switches CCW STOP CW CCW STOP CW SW SW SW 4 SW 5 SW 6 SW 7 SW 8 Time ms/div

9 9 Load all discs. Power on. Initial state. insert disc. Press open #. Tray moves out. Load carriage #.. Press open #. Carriage # moves in extra position. 4. Load carriage #. insert disc 5. Press open #. Tray closes. 6. Carriage # moves in home position. 7. Clamper moves to upper position. Carriage # moves to height of carriage #. 8. Carriage # moves to height of carriage #. 9. Carriage # moves below carriage #.. Carriage # moves down.. Carriage # moves in home position.. Carriage # and clamper move down (in play position). insert disc. Tray moves out. Load carriage #. 4. Press close. Tray closes.

10 Change backwards Change forwards E.g. select # while playing #. E.g. select # while playing #. See also timing diagrams (page 8). Additional hints: Gears pos. 4 and pos. 5 are responsible for forward/backward movement of the carriages. Star Gears pos. ( are responsible for up/down movement of the carriages. Mis-aligned gears (pos. 4 & 5) result in jamming carriages. Wrong inserted carriages (e.g. # mixed up with #) causes endless forward/backward changing of the loader module.

Repair Tips Replacing the CD Drive. Dismantle top and side cover of set.. Loosen 4x screw (see picture ). Remove metal cover of changer.

Remove bracket with clamper. 7. Remove carriage above CD-drive. 8. Loosen 4x screw (see picture ). Remove CD-drive. 9.

. Solder wires to new CD-drive (see page ). 4. Connect flexfoil. 5. Remove solder joint on new CD-drive (see page ). 6. Position the new CD drive in its studs.

11 Repair Tips Replacing the CD Drive. Dismantle top and side cover of set.. Loosen 4x screw (see picture ). Remove metal cover of changer.. Connect mains and switch on the set. 4. Press Open/Close CD button Tray moves outside. 5. Disconnect mains. 6. Loosen x screw (see picture ). Remove bracket with clamper. 7. Remove carriage above CD-drive. 8. Loosen 4x screw (see picture ). Remove CD-drive. 9. Disconnect flex foil and short-circuit it (see page ).. Desolder wires.. Remove dampers pos. 57 and 58.. Insert dampers into new CD-drive.. Solder wires to new CD-drive (see page ). 4. Connect flexfoil. 5. Remove solder joint on new CD-drive (see page ). 6. Position the new CD drive in its studs. 7. Fix the drive - 4x screw (see picture ). 8. Insert carriage. 9. Mount bracket with clamper - x screw (see picture ).. Mount metal cover of the loader unit - 4x screw (see picture ).. Connect mains Press Open/Close CD button Tray closed. picture picture picture

Jammed carriage, blocked tray If the tray can t be opened via open close dismantle the top

In this state clamper A is in upper position and carriage B is jammed under the clamper.

cannot move down because of the jammed carriage.

12 Jammed carriage, blocked tray If the tray can t be opened via open close dismantle the top and side cover of the set and remove the metal cover of the loader unit as shown in picture. If the carriage is in a position as shown in picture 4, the complete loader unit is locked. In this state clamper A is in upper position and carriage B is jammed under the clamper. Problem : The tray cannot open as long as the clamper is in upper position and the clamper cannot move down because of the jammed carriage. picture 4 The problem can only be fixed as follows. Loosen x screw (see picture 5). Remove bracket with clamper.. Shift lever (pin) to the left as shown in picture 6. This action releases the tray. picture 5 picture 6

Jammed carriage, blocked tray (continued).

picture 7 Tray moves approx. cm outside. 4.

tray. Bend carriage - as shown in picture 8 -

Turn pulley as shown in picture 9 to move next

13 Jammed carriage, blocked tray (continued). Shift lever (block) backwards as shown in picture 7 Tray moves approx. cm outside. 4. Pull out the tray manually. 5. Remove carriage above the CD-drive. WARNING: Don t apply mechanical force to the tray. Bend carriage - as shown in picture 8 - to release guidings. picture 7 picture 8 6. Turn pulley as shown in picture 9 to move next carriage over CD-drive. 7. If necessary repeat step 5 and 6 until all carriages are removed. picture 9

4 Reassembling the tray. Insert carriage # above CD-drive. Attention: The cartridges are different (see picture ).

Select CD Clamper moves up Carriage # (not yet inserted) will be moved above CD-drive Carriage # moves back Clamper moves down. 5.

Lift clamper - using lever (pin) as shown in picture. 7. Insert carriage # above CD-drive. 8. Lower clamper, close tray, connect mains.

Clamper moves up carriage # (not yet inserted) will be moved above CD-drive carriage # moves back Clamper moves down.

14 4 Reassembling the tray. Insert carriage # above CD-drive. Attention: The cartridges are different (see picture ).. Mount clamper (x screw - see picture 5).. Connect mains. Set initializes Clamper moves down. 4. Select CD Clamper moves up Carriage # (not yet inserted) will be moved above CD-drive Carriage # moves back Clamper moves down. 5. While clamper moves down disconnect mains. 6. Open tray - using lever (block) as shown in picture 7. Lift clamper - using lever (pin) as shown in picture. 7. Insert carriage # above CD-drive. 8. Lower clamper, close tray, connect mains. Set initializes carriage # moves above CD-drive Clamper moves down. 9. Select CD. Clamper moves up carriage # (not yet inserted) will be moved above CD-drive carriage # moves back Clamper moves down.. While clamper moves down disconnect mains.. Open tray - using lever (block) as shown in picture 7. Lift clamper - using lever (pin) as shown in picture.. Insert carriage # above CD-drive.. Lower clamper, close tray, connect mains. Set initializes Carriage # moves above CD-drive Loader unit reassembled successfully. picture picture Move lever to unlock clamper

. Shift lever (block) backwards as shown in

15 5 Replacing the Gears (pos. & 4). Disassemble complete Loader unit.. Shift lever (block) backwards as shown in picture 7 Tray moves approx. cm outside. Pull out the tray manually.. Demount right side of tray (see picture ). 4. Close tray (simply push inside). 5. Demount left side of tray (see picture ). Lift right side as high as possible. Attention: The two gearwheels shown in detail A resp. detail B come loose easily! picture picture Detail A Detail B picture 4

8. Turn gearwheel A in the other direction

. Turn round tray and align gear as shown in

ar with a pin (e.g. a paperclip d=mm) see detail B.

16 6 Replacing the Gears (continued) 6. Turn gearwheel A as shown in picture 5 carriage moves right. 7. Lift carriage as shown in picture 6 and remove it. 8. Turn gearwheel A in the other direction remaining carriage moves right. 9. Lift carriage as shown in picture 6 and remove it.. Turn round tray and align gear as shown in picture 7, detail C.. Fix the gear with a pin (e.g. a paperclip d=mm) see detail B.. Loosen 4x screw as shown in picture 7, detail D. picture 5 Detail D picture 6 Detail C picture 7

7 Replacing the Gears (continued). Replace gear pos. and/or 4.

strip of paper as shown in picture 8. 4.

Check if gear is aligned as shown in picture 7 detail C.

Turning gear A as shown in picture 9 will move the upper and lower

17 7 Replacing the Gears (continued). Replace gear pos. and/or 4. Make sure that the new gear is aligned as shown in picture 7, detail C as well. To avoid damage of the switches when inserting the gear, use a strip of paper as shown in picture Fix gear with 4x screw (see picture7,d). 5. Check if gear is aligned as shown in picture 7 detail C. Inserting the Carriages 6. Turning gear A as shown in picture 9 will move the upper and lower wheel of gear B alternately. Turn gear A until the lower wheel stops moving and upper one starts moving. 7. Insert right side of carriage # (= side with the toothrack) as shown in picture. picture 8 picture 9 Detail B picture Detail A

8 Inserting the Carriages (continued) 8.

Turning gear A as shown in picture 9 will move carriage inside.

turning.. Insert carriage # as shown in picture and.

. Lift clamper and insert carriage # above CD-drive.

18 8 Inserting the Carriages (continued) 8. Insert other side of carriage as shown in picture. 9. Turning gear A as shown in picture 9 will move carriage inside. After reaching the endposition the upper wheel (picture9 B) starts turning.. Insert carriage # as shown in picture and.. Lift carriage # while turning gear A (see picture ).. Lift clamper and insert carriage # above CD-drive.. Shift lever as shown in picture. Assembling the Tray 4. Lift back side of tray as high as possible. Assemble tray starting at position as shown in picture 4. picture picture picture picture 4

19 9 Assembling the Tray (continued) 5. Move tray outside (simply pull the tray). 6. Align toothed wheel A as shown in picture Snap in other side of tray as shown in picture Move tray inside (simply push). 9. Done. Detail picture 5 picture 6

20 Disc Tray Changer Exploded view A x A MECHANICAL PARTS ASSY HOLDER LEFT ASSY HOLDER RIGHT ASSY CARRIAGE (TOP) ASSY GEAR STAR ASSY MOTOR CARRIAGE ASSY MOTOR DRAWER BELT DRAWER BELT CARRIAGE DAMPER RUBBER REAR DAMPER RUBBER FRONT CD DRIVE VAM/ (x SPEED) CD DRIVE VAM/ (x SPEED) CD DRIVE VAM4/ (4x SPEED) ASSY CARRIAGE (MIDDLE) ASSY CARRIAGE (BOTTOM) SWITCH (SW6-SW8) SWITCH (SW-SW5) 9 55 DTC MECH. CMCJ-- (xspeed) 9 56 DTC MECH. CMCJ--4(xSPEED) 9 57 DTC MECH. CMCJ--5(4xSPEED) Complete Mechanic - CD Drive already included Exploded view DTC 8

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