Philips-CDR870-cdr-cd 电路图 维修手册.pdf

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1、Compact Disc Recording Service The basics of Compact Disc Recordable and Compact Disc ReWritable (reference set is CDR870) Radio en Tslevisieservic KEES vande40RTEL Bolwheuvelstraat 14 5222 AN s-HERTOGENBOSCH Tel.; (073) 6218344 Tabla of Contents 1. Introduction 2. CD-Recording discs 3. The CD-Recor

2、dable/ReWritable Audio Recorder Copyright 1998 Philips Consumer Electronics B.V. Eindhoven, The Netherlands. AH 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

3、 without the prior permission of Philips. Published by JO 9862 Service Disc Systems Printed in Ttie Netherlands Subject to modification m 4822 725 25242 0. PHILIPS RadioFans.CN 收音机爱 好者资料库 BASICS CDR/RW Service disc systems PHILIPS RadioFans.CN 收音机爱 好者资料库 Philips Sound plays all audio CDs Records fro

4、m all home stereo analogue and digital sources Optical and coaxial digital input and output Automatic sample rate conversion from 32 and 48 kHz to 44.1 kHz Automatic or manual track numbering CD-Sync autostart recording from digital sources SCMS Serial Copy Management System Precision diecast mechan

5、ism 1-bit Analogue-to-Digital converter The CDR 870 gives you the choice of creating your own CDs on write- once CD-Recordable discs or on re-usable CD-ReWritable discs, all at once or in sessions. (oJDi o J D S DIGITAL AUDIO Recordable DIGITAL AUDIO RadioFans.CN 收音机爱 好者资料库 Making your own CDs - the

6、 final functionality for your audio system This unique Philips CD-Recorder gives you the capability,for the first time.to make your own top-quality audio CDs,on eitherwrite-once CD-Recordable discs or re-usable CD-ReWritable discs. Subject to the digital copy constraints of the SCMS system, you can

7、make CDs from all analogue or digital sources in your audio system. Discs can be recorded all at once, or in stages, known as sessions. Just as on a prerecorded CD, you can put track numbers on your own discs, automatically or manually, depending on the source and your own preference. And when final

8、ized for playback, these discs behave in exactly the same way as your regular prerecorded CDs. ;. A;.-. t 1 O ! n COMPACT mm Recordable II )(Al CD-Recordable - The Write- Once Discs 3 CD-Recordable (CD-R) discs COMPACT feature an organic dye layer for recording, applied over a substrate containing a

9、 DIGITAL AUDIO wobbulated pre-groove to guide the laser beam. The pre- groove is FM modulated with time code and other disc information. The average wobbulation frequency is used to control the turntable speed, while the time code is used to position the recordings on the disc. During recording, the

10、 laser forms bumps in the dye layer, which have the same effect as the pits in a pre-recorded CD. When fuily recorded and finalized, CD-R discs are fixed for life, and will play on all CD players and recorders. CD-Rewritable - The Erasable And Reusable Disc Blank CD-Re-Writable (CD-R-W) discs use ph

11、ase change technology for COMPACT recording, and the same wobbulated pre-groove principle. A low-reflectance n COMPACT mm DIGITAL AUDIO domain of amorphous (or non- crjstalline) phase, is produced when the laser heats the recording layer ReWritable rapidly above its melting point of 500-700 C. Cooli

12、ng quickly, this amorphous domain freezes and becomes reflective. If, on the other hand, the recording layer is heated to a rather lower temperature for a somewhat longer time, a light-diffusing crystalline phase is formed. Because these changes are reversible, CD-RW discs can be erased and rewritte

13、n, at least a thousand times. During recording, individual tracks can be erased; when fuUy recorded and finalized, these discs must be erased compietely before re-use. FinaUzed CD-RW discs will play on all CD-RW- compatible CD players and recorders. Philips will start to make its CD-players compatib

14、le with RW-discs in 1998. Note: The CDR-870 is designed to use CD-R and CD-RW discs optimized for audio recording, and hearing these ( logos.CD-R and CD-RW discs produced specially for use with CD-R/ RW computer drives are not suitable. The logos on these discs do not contain Digital Audio. Analogue

15、 Recording This is just like recording on to cassette tape. You adjust the record level control so that the loudest passages fill the blue section of the record level meter on the display, without going into the red overload section. If you choose automatic track numbering, the CDR 870 inserts a new

16、 track number each time it detects a 3-second pause in the music. With manual track numbering, you can insert track numbers any place you like during recording. When the recording stops, the discss temporary Table Of Contents is automatically updated, and when you come back to resum recording, the p

17、layer automatically finds the end of the last recording session. Digital Recording No record level setting is required for digital recording; the level is regulated in the digital input signal. If you choose automatic track number- ing, the CDR 870 inserts track numbers directly from the source mate

18、rial. With manual track numbering, you can again insert track numbers any place you like during recording. When the recording stops, the discss temporar) Table Of Contents is auto- matically updated, and when you come back to resum recording, the player automatically finds the end of the last record

19、ing session. CD Sync Recording With this ultimate convenience feature, recording starts automatically as soon as the source begins to play. CD-Sync Recording Iets you record either individual tracks or an entire disc from any digital input, with automatic or manual track numbering. SCMS J A The CDR

20、870 incorporates the internationally-accepted SCMS Serial Copy Management System. With SCMS, only single direct copies of digital source material are permitted: it is not possible to copy digital copies. - : Finalizing A Disc Finalizing a fuUy-recorded disc is a simple matter of pressing the FinaHze

21、 key, followed by Record. Once initiated, the procedure is fully automatic. After finalization, discs will play on other CD players or recorders, but further music tracks cannot be added. CD-RW discs can be rewritten after they have been compietely erased. Playbaclc The CDR 870 has all the familiar

22、CD playback features: play, pause, next and previous track, track selection by number, 2-speed fast forward and reverse search, and programmed playback. Front Remote 1 POWER ON/ OFF 16 Level Meter (analogue input) 1 OPEN/ CLOSE 2 Headphone jack (PHONES) 17 AUTO/ MANUAL track increment 2 INPUT select

23、or 3 Headphone level (LEVEL) selection 3 Numeric buttons 0-9 4 Disc tray 18 DISPLAY indication selection 4 STOP 5 Display 19 INPUT select 5 PREVIOUS 6 OPEN/ CLOSE 6 Search reverse button 7 Record (REC) Rear 7 TRACK INCRement 8 FINALIZE 1 Analogue line input jacks 8 FINALIZE 9 ERASE 2 Analogue line o

24、utput jacks 9 CDSYNC 10 CDSYNC 3 Digital input 10 REC 11 Previous track selection (PREV) 4 Digital output 11 PROCiRAM 12 Next track selection (NEXT) 5 Optical digital input 12 FAST search button 13 PLAY 6 Optical digital output 13 Search forward button 14 PAUSE 7 Voltage selector (not on all verslon

25、s) 14 NEXT 15 STOP 8 AC Mains input 15 PLAY 16 PAUSE 17 REPEAT 18 DISPLAY indication modes T E C H N 1 C A L GENERAL System Compact disc digital audio Number of chamiels 2 (stereo) Applicable discs CD, CD-R, CD-RW Power supply AC 230V (/OO), 120V(/ 17), 120/230V(/11) Power consumption 15W Operating

26、temperature 5-35C Weiglit 4Kg Dimensions 435x310 x75 mm (wxdxh) AUDIO Frequency response 20 Hz-20 kHz SPECIFICATIONS C D R 8 7 0 Playback S/N 105 dB Playback dynamic range 98 dB Playback total harmonie 85 dB distortion Recording S/N 90 dB Recording dynamic range 95 dB Recording total harmonie distor

27、tion 85 dB Line output vokage 2 Vrras PLAYBACK FUNCTIONS Digital coaxial output 0.5V(pp)/75Q Play Digital optical output -20 dBm Headphones Pause 0-5Vrms/8-2000a Stop Recording values for line input/ output Direct track selection Digital coaxial input 32-48 kHz (automatic sample rate conversion) Nex

28、t/Previous track selection Search forward/reverse Digital optical input 32-48 kHz (automatic sample rate conversion) Analogue input RECORDING FUNCTIONS Recording Auto start recording (Cdsync) Pause recording Erase last track (CD-RW disc) Erase disc (CD-RW disc) Manual track Increment Automatic track

29、 Increment Remaining recording time display Finalize (writing TOC) SCMS (Serial Copy Management System) RID code (Recorder Unique Identifier) Fast search forward/reverse Repeat (all/ l-track) Program play (20 tracks) 700mVrms/50kn Time display switching ACCESSORIES Remote control (-i-batteries) Audi

30、o cable (x2) Digital coaxial cable (xl) AC mains cable IMPORTANT: IT IS A CRIMINAL OFFENCE, UNDER APPUCABLE COPYRIGHT LAWS, TO MAKE UNAUTHORISED COPIES OF COPYRIGHT- PROTECTED MATERIAL INCLUDING SOUND RECORDINGS. THIS EQUIPMENT SHOULD NOT BE USED FOR SUCH PURPOSES. Philips Sound zyxwvutsrqponmlkjihg

31、fedcbaZYXWVUTSRQPONMLKJIHGFEDCBA -.vi 17 1.1 Thie CD-Recording system 2 3.3.1 The input part of the circuit with 1.2 The most important differences between the ENCODER path . ; 17 CD-R/CD-RW discs and pre-recorded CDs 2 3.3.1.1 Digital In 17 1.3 The requirements for the 3.3.1.2 Analogue Digital conv

32、erter 18 CD-Recording system 3 3.3.1.3 Cross Interleave Read/Solomon Code to Eight-to-Fourteen-Modulation (CIRC EFM) CD-Recording discs 3 Encoder 18 2.1 The CD-Recording discs 3 3.3.2 The output part of the circuit with 2.1.1 Dimensions 3 the DECODER path 18 2.1.2 Tlie structure 3 3.3.2.1 DAC analog

33、ue output , 19 2.2 The principle of recording 4 3.3.2.2 Digital output 19 2.2.1 The writing process CD-R 4 3.3.2.3 Monitoring 19 2.2.2 The Writing process CD-RW 4 ,;., , , 2.2.2.1 Recording . 4 2.2.2.2 Erasing , 5 2.2.2.3 Overwriting 5 2.3 The groove in the CD-Recording discs 5 1 . , . -, , 2.3.1 Di

34、mensions 5 2.3.2 The wobble of the groove 5 2.3.3 The wobble modulation 5 2.4 The requirements for the CD-Recording discs 6 2.4.1 The unrecorded (blanl) disc 6 2.4.2 The recorded disc 6 2.5 Data Organization 6 2.5.1 Power Calibration Area 6 2.5.2 Program Memory Area 6 2.5.3 Lead In Area 6 2.5.4 Prog

35、ram Area 6 . . . , 2.5.5 Recordable User Area + Lead Out Area 6 2.5.6 The general linking rules 7 2.5.7 Misrecording 7 Tlie CD-Recordable/ReWritable Audio Recorder 8 3.1 Blocldiagram of a CD-Recordable/ ReWritable Audio recorder 8 3.2 The IVIechanical part with its control systems 12 3.2.1 The CD-Re

36、cording drive 12 3.2.1.1 The CDM mechanism 13 3.2.1.2 The CDM requirements 13 3.2.1.3 The 3-spots push pull system 14 3.2.1.4 shock sensitivity , , i 14 3.2.1.5 focus radius 14 3.2.1.6 eccentricity , .-14 - . i , : 3.2.2 The CDM board . 14 3.2.2.1 Laser Control 15 i : 3.2.2.2 Optical Power Calibrati

37、on 15 . 3.2.2.3 Normalizing 16 3.2.3 The Servo Functions 16 3.2.3.1 Turntable Motor Control in recording and play-back mode 16 3.2.3.2 Focus servo 16 3.2.3.3 Radial servo 16 3.2.4 The Wobble Processing 16 3.2.5 The Servo microcontroller 17 I i Service disc systems 2 BASICS CDR/RW 1 Introduction 1.1

38、Tlie CD-Recording system The CD-Recording system consists of a CD-Recorder/player and the exchangeable software carrier CD-Recording disc. Most known CD systems, like CD-Audio, CD-ROM, CD-I CD-ROM XA, Photo CD, Video CD are pre-recorded systems, and lack the facility of recording as enjoyed by tape

39、systems. This CD-Recording system addresses this deficiency. Dependant to the applied disc carrier two different solutions are in use: CD-Recordable and CD-ReWritable. CD-Recordable (CD-R), a so-called Write-Once principle, has the advantage of tuil compatibility with all pre-recorded CD systems. CD

40、-ReWritable is able to write, read and rewrite CD-ReWritable discs (CD-RW). CD-RW discs have a lower reflectance than Standard CDs and therefore cannot be played-back by all todays CD players. Above that both recording disc systems can be split to a Professional application (e.g. CD-ROM) and a Consu

41、mer (Audio) application. Both applicatlons have their own CD-Recordable and CD-ReWritable discs with appropriate logo, to comply with copyright legislation in various countries. The Audio CD-Recorder/player will only make recordings on CD-R and CD-RW discs bearing the appropriate Digital Audio logo.

42、 These discs are subject to levies that are payable to the relevant copyright protection associations. Concerning the lower reflectance of Audio CD-RW discs: For CD-Audio players, from production 1998 onwards, Philips intends to extend all her future CD-Audio players so that they will be able to pla

43、y Audio CD-ReWritable discs. With the introduction of the CD-R/RW Audio Recorder at the end of 1997 both recording functions (Recordable and ReWritable) are combined in one Audio CD-Recorder/player. This description assumes the knowledge of the conventional CD-Audio system. 1.2 Tiie most important d

44、ifferences between CD-R/CD-RW discs and pre-recorded CDs. The main physical difference between CD-R/CD-RW disc types and the pre-recorded CD is that the latter has no recording layer; the information is permanently stamped in the aluminium reflecting layer. There is also a difference in terms of the

45、 data areas on the disc. Compared with Standard CDs, there is a CD-R/CD-RW area that is located in front of the Lead-ln Area. This additional area is used to store data specific to the recor- ding process and is divided into the Program Memory Area (PMA) and the Program Calibration Area (PCA). In ch

46、apter 2.5 Data Organization these areas are explained in more detail. As long as recordings are made on the disc the Lead-ln Area is not filled. At the moment the recording disc is converted into a Standard CD-format, the PMA information is recorded in the Lead-ln Area. This process is called Finali

47、zing, because after this procedure no more recordings on this disc can be made. 1.3 The requirements for the CD-Recording system The most important requirement for the CD-Recording system is to be compatible with the conventional CD-Audio system. The CD-Recording system has an added advantage to mak

48、e an incremental recording. This means that a recording session can be interrupted at any time, and can be continued at a later time, possibly using a different recorder. The successive parts of information are recorded sequentially on the disc. The Audio recorded disc is compatible with the CD-Audio system. This is only true for the fully recorded CD-R disc, which means that the Lead-ln Area has been recorded after the recording of the last track of the disc (Finalizing). For finalized CD-RW discs (reflection) adapted players will play back these discs only. The blank CD-Recordi