Fostex-CR200-cd-sm维修电路原理图.pdf

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1、Service Manual Compact Disc Recorder CR200 Model DANGER - LASER RADIATION WHEN OPEN. AVOID DIRECT EXPOSURE TO BEAM. RadioFans.CN 收音机爱 好者资料库 SAFETY INSTRUCTIONS Read instructions - All the safety and operating instruc- tions should be read before the appliance is operated. Retain instructions - The s

2、afety and operating instructions should be retained for future reference. Heed warnings - All warnings on the appliance and in the operating instructions should be adhered to. Follow instructions - All operating and use instructions should be followed. Water and Moisture - The appliance should not b

3、e used near water - for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, and the like. Carts and Stands - The appliance should be used only with a cart or stand that is recommended by the manufac- turer. An appliance and cart combination shoul

4、d be moved with care. Quick stops, excessive force, and uneven surfaces may cause the appliance and cart combination to over- turn. Wall or Ceiling Mounting - The appliance should be mounted to a wall or ceiling only as recommended by the manufacturer. Ventilation - The appliance should be situated

5、so that its location or position does not interfere with its proper ven- tilation. For example, the appliance should not be situ- ated on a bed, sofa, rug, or similar surface that may block the ventilation openings; or, placed in a built-in installa- tion, such as a bookcase or cabinet that may impe

6、de the flow of air through the ventilation openings. Heat - The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other appliances (including amplifiers) that produce heat. Power Sources - The appliance should be connected to a power supply only of the

7、 type described in the operating instructions or as marked on the appliance. Grounding or Polarization - The precautions that should be taken so that the grounding or polarization means of an appliance is not defeated. Power Cord Protection - Power supply cords should be routed so that they are not

8、likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience recep- tacles, and the point where they exit from the appliance. Cleaning - The appliance should be cleaned only as rec- ommended by the manufacturer. Nonuse Periods - T

9、he power cord of the appliance should be unplugged from the outlet when left unused for a long period of time. Object and Liquid Entry - Care should be taken so that objects do not fall and liquids are not spilled into the en- closure through openings. Damage requiring Service - The appliance should

10、 be ser- viced by qualified service personnel when: A. B. C. D. E. Servicing - The user should not attempt to service the ap- pliance beyond that described in the operating instruc- tions. All other servicing should be referred to qualified service personnel. REFER SERVICING TO QUALIFIED SERVICE PER

11、SONNEL. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE. TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT, FULLY INSERT. POUR VITER LES CHOCS LECTRIQUES, INTRODUIRE LA LAME LA PL

12、US LARGE DE LA FICHE DANS LA BORNE CORRE- SPONDANTE DE LA PRISE ET POUSSER JUSQU AU FOND. CAUTION: ATTENTION: The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and mainte- nance (servicing) instructions in the literature accompa

13、nying the appliance. The lightening flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the products en- closure that may be of sufficient magnitude to constitute a risk of electric shock to persons. “WA

14、RNING” “TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOIS- TURE.” 1. 2. 3. 4. 5. 6. 7. 8. The power supply cord or the plug has been damaged; or Objects have fallen, or liquid has been spilled into the appliance; or The appliance has been exposed to rain; or

15、The appliance does not appear to operate normally or exhibits a marked changed in performance; or The appliance has been dropped, or the enclosure damaged. 9. 10. 11. 12. 13. 14. 15. 16. 17. RadioFans.CN 收音机爱 好者资料库 3 CR200 TABLE OF CONTENTS Parts marked with this sign are safety critical components.

16、 They must always be replaced with identical components. Refer to the Fostex Parts List and ensure exact replacement. ! CAUTION 4 7 10 12 39 65 77 85 1. CD-R THEORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . .

17、 . . . . . . . . . . . . . . . . . . . 3. CONTROLS, INDICATORS & CONNECTORS . . . . . . . . . . . . . . . . . 4. ADJUSTING PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5. ADDITIONAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . 6. EXPLODED VIEW, PCB ASSEMBLY & P

18、ARTS LIST . . . . . . . . 7. CIRCUIT & BLOCK DIAGRAMS. . . . . . . . . . . . . . . . . . . . . . . . . 8. TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NOTES Adjusting procedures are given in this manual which also includes a Parts List and circuit diagrams to assist th

19、e service technician in maintaining the Model CR200. The following accessory is supplied with CR200 as a standard. * * Following is the packing material for the Model CR200. Carton, inner, CR200: 8228718000 Carton, outer, CR200: 8228897000 Packing, L, CR200: 8228443000 Packing, R, CR200: 8228444000

20、* Owners manual, CR200: 8288407000 (for export model) Remote control unit Model 8317: 8270829000 Audio cable (L : 1.2m): 8276912000 Power cable: 8276910000 (for USA model) : 8276911000 (for EUR model) RadioFans.CN 收音机爱 好者资料库 4 CR200 1. CD-R THEORY 1-1. Physical layout compared to CD The conventional

21、 CD and CD-R discs basically have the same physical layout. However, as you can see from the Fig. 1, comparing to the conventional CD, the CD-R disc also has so- called “minus” areas such as PCA (Power Calibration Area) and PMA (Program Memory Area) where the temporary information is recorded. Unrec

22、orded, blank disc The information area is located next to the clamping area and the center hole. This area contains a pregroove with CLV (Constant Linear Velocity) clocking information and a time code. Partially recorded disc The CD-R system gives the opportunity to record a disc in several actions

23、at a different time on a different recorder. After the first recording, the information area is divided into five parts as shown below and in the right. 1: Power Calibration Area (PCA) 2: Program Memory Area (PMA) 3: Lead-in Area 4: Program Area 5: Lead-out Area Finalized disc After finalizing the d

24、isc, the CD-R disc will become compatible with the RED Book (for regular CD) definitions and specifications. Therefore, it can be played back on conventional CD players. The Information Area of a finalized disc consists of three parts: 1: Lead-In Area 2: Program Area 3: Lead-Out Area Fig. 1 Cross Se

25、ction of CD-R & CD Disc 15 min 26 min 33 44.7 max 118 120 Center hole Clamping area Information area Pregroove area with address (ATIP) 46 50 max 116 44.7 max 118 Recordable User Area + Lead-out Area Program Area recorded part PCA PMA temporary Table Of Contents (TOC) Lead-in Area 46 50 max 116 max

26、118 Lead-out Area Program Area recorded part Lead-in Area final Table of Contents (TOC) Layout of unrecorded CD-R disc Layout of partially recorded CD-R disc Layout of recorded CD-R disc 46 50 max 116 max 118 Lead-out Area recorded part TOC Layout of conventional CD disc MUSIC MUSIC MUSIC RadioFans.

27、CN 收音机爱 好者资料库 5 CR200 1-2. Pregrooved track wobbling + ATIP When manufacturing the CD-R disc, it has been pregrooved. This pregroove in the CD-R disc is not a perfect spiral but is wobbled so that the CD-R disc can be recognized by a CD-R recorder even when it is completely blank. It has many purpos

28、es. It not only helps keep the servo on an exact tracking of outgoing spiral but also the demodulated wobbling frequency contains the time information in digital format (21.05 kHz = 0, 23.05 kHz = 1). These frequencies have been selected so that the mean frequency is equal to Fs / 2 (= 22.05 kHz). A

29、lso the interleaved is the manufacturers measured default laser power level. Fig. 2 Structure of Pregrooved Disc Every time the CD-R disc is inserted, one test is performed. Also if you leave the disc in the recorder at power off, a test will be performed when powering on. This might lead to the sit

30、uation that the PCA might be fully used up even if there is a remaining space to record audio signal. The recordings made after the PCA is fully used up will not be optimal in performance. CAUTION : 1-3. PCA + consequence Each recorder has a tolerance in the laser power and the dye from different ma

31、nufacturers varies. In order to optimize the recorder / disc combination, there is a PCA (Power Calibration Area) included in the CD-R disk. This area consists of two parts, the Count Area and Test Area. In the Test Area, test recordings are made, stepping through several power levels. After playing

32、 back the recorded test signal, the optimum level is automatically determined. This value is memorized until the disk tray is opened. The Count Area keeps the track on how many of the test areas have been used indicating where to start the next test. The PCA is designed to accommodate for 100 tests.

33、 When the PCA is full, the default value written in the wobbled groove is used instead. Fig. 3 Organization of PCA, PMA and Lead-In Area 0.6m (track width) 1.6m (track distance) 22.05 1kHz = 60m 10098 Test AreaCount Area PCA 4 3 2 198531 PMA Lead In Area Partition RadioFans.CN 收音机爱 好者资料库 6 CR200 1-4

34、. CD-R Disc Structure and Bubbling Process 1-5. Finalize In order to be playable on an ordinal CD-player, the CD-R disc must have a corresponding data for TOC (Table Of Contents). This area is not used until all the recording is completed. Instead, a special area called PMA (Program Memory Area) is

35、used. When the disk is full or all the recording is completed, the disk can be finalized. This means that the temporary information in the PMA is checked and transferred to TOC. Now the disk is playable on an ordinal CD player but it will not be recordable any more. The materials of CD-R disc consis

36、ts of label, protective layer, reflective layer, organic dye layer and transparent substrate. During recording, the laser is tracing the wobbled groove. When a pit is to be recorded, the laser fires off a high power beam and the organic dye will become black and deformed. This is the way a non-refle

37、ctive part is created. When a groove is to be recorded, the laser is not fired and the high-reflective surface is maintained. If the data word contains successive the same information (e.g. 111 or 000), the pit will be continuous. When the data word contains changes, the pit - groove status will als

38、o change. Fig. 5 Recording & Playback Principle Label Fig. 4 Cross Section of CD-R disc 123456789012345678901234567890121234567890123456 123456789012345678901234567890121234567890123456 123456789012345678901234567890121234567890123456 123456789012345678901234567890121234567890123456 1234567890123456

39、78901234567890121234567890123456 Refective layer UV protective layer Organic dye layer Transparent substrate Land Groove Laser beam Recording Principle Playback Principle NO PITSON PITS A high power laser beam is shot.Organic dye becomes black and pit is created. A low power laser beam is shot and h

40、igh reflectance is obtained. A low power laser beam is shot and only low reflectance is obtained. RadioFans.CN 收音机爱 好者资料库 7 CR200 2. SPECIFICATIONS FUNCTIONS Sampling rate converterFs : 48 kHz / 32 kHz 44.1 kHz Automatic disk distinction Time display switching Synchronous to one song / All songs / D

41、AT ID REC mute Automatic power calibration Automatic track increment Manual track increment Automatic REC PAUSE PreviousEnd section of previous track can be reproduced during REC PAUSE mode. Fader in / fader outCan be controlled only by infra-red remote controller Disk remaining time display Samplin

42、g monitor Skip play Track skip on / offCan be controlled only by main unit key One song / all songs program repeatCan be controlled only by infra-red remote controller Program play Manual search Track search Direct searchCan be controlled only by infra-red remote controller Program setting / clearCa

43、n be controlled only by infra-red remote controller Input sensitivity switchSW 1 (+4 dBu / -8 dBu, rear panel) Infra-red remote controller on / off switchSW 2 (rear panel) Digital out on / off switchSW 2 (rear panel) Copy bit setting switchSW 2 (No restriction / One time only / Prohibited, rear pane

44、l) FL DISPLAY CONTENTS PLAY REC PAUSE REPEAT 1-REPEAT AUTO TRACK No. PROGRAM TOC Level meter Track number Input sampling frequency Elapsed time Remaining time Total time Remaining record time RadioFans.CN 收音机爱 好者资料库 8 CR200 GENERAL ModelCompact disc recorder Applicable discsCDs and CD-Rs Number of c

45、hannels2 channels (stereo) Power supplyAC 120 V, 60 Hz AC 220 230 V, 50 / 60 Hz Power consumption21 W Weight (without package)6.2 kg / 13.7 lbs Maximum dimensions482 (W) x 134 (H) x 294 (D) mm 18-31/32 (W) x 5-9/32 (H) x 11-9/16 (D) inch AUDIO UNIT Playback (CD) Frequency characteristics4 Hz 20 kHz

46、1.0 dB S/N83 dB or more (EIAJ) Dynamic range83 dB or more (EIAJ) Total harmonic distortion0.01 % or less (EIAJ) Channel separation90 dB or more (EIAJ) De-emphasis deviation0 1.5 dB or less (EIAJ) Level difference between channels1.0 dB or less (EIAJ) Output voltage2.4 V 0.3 V rms Monitoring (analog

47、RCA pin input) Frequency characteristics4 Hz 20 kHz 1.0 dB S/N83 dB or more (EIAJ) Dynamic range83 dB or more (EIAJ) Total harmonic distortion0.01 % or less (EIAJ) Maximum input level3.2 V rms or more Minimum input level0.4 V rms or less Record & Playback (analog RCA pin input) Frequency characteris

48、tics4 Hz 20 kHz 1.0 dB S/N83 dB or more (EIAJ) Dynamic range83 dB or more (EIAJ) Total harmonic distortion0.01 % or less (EIAJ) Monitoring (Digital coaxial input) Frequency characteristics4 Hz 20 kHz 1.0 dB S/N95 dB or more (EIAJ) Dynamic range90 dB or more (EIAJ) Total harmonic distortion0.01 % or

49、less (EIAJ) Maximum input level0.6 V rms or more Minimum input level0.2 V rms or less Record & Playback (Digital coaxial input) Frequency characteristics4 Hz 20 kHz 1.0 dB S/N90 dB (analog) / 105 dB (digital) Dynamic range90 dB (analog) / 95 dB (digital) Total harmonic distortion0.01 % (analog) / 0.003 % (digital) RadioFans.CN 收音机爱 好者资料库 9 CR200 INPUT / OUTPUT JACKS Analog Input XLR-3-31 type (x 2) Standard input level+4 dBu / -10 dBV (switchable) Input impedance10 k RCA type (x 2) Standard input level-10 dBV Input impedance27 k or more Analog Output (x 2) RCA typ