Jvc-XRD-400-SL-Service-Manual电路原理图.pdf
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1、SERVICE MANUALNo.A0001ContentsSafety precautionsTechnical descriptionDisassembly methodTroubleshootingPrecaution for servicing1-21-31-61-91-13VICTOR COMPANY OF JAPAN, LIMITEDOPTICAL DISC BUSINESS DIV. PERSONAL & MOBILE NETWORK BUSINESS UNITAV & MULTIMEDIA COMPANY 1644, Shimotsuruma, Yamato, Kanagawa
2、 242-8514, JapanNo.A0001Sep. 2000COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.Printed in Japan200009 (S)MULTIPLE COMPACT DISC RECORDERPOWER1 TRACK ALLREPEATSPEEDERASEOVEROPEN/CLOSESOURCESPEEDREPEATFINALIZEPROGRAMREC4x 2x 1x1112123134145156167178189191020OPEN/CLOSEREC/PLAYSCSI AUTO RECXR-D400SLXR-D400
3、SLXR-D400SLE GermanyArea SuffixXR-D400SL1-2Safety precautions1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufac
4、turer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or
5、 additions will void the manufacturers warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.3. Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often n
6、ot evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical c
7、omponents having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may cr
8、eate shock, fire, or other hazards.4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is requ
9、ired, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.5. Leakage current check (Electrical shock hazard testing)After re-assembling the product, always perform an isolation check on the exposed metal parts
10、 of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.Do not use a line isolation transformer during this check.Plug the AC line cord directly into the AC outlet. Using
11、 a “Leakage Current Tester“, measure the leakage current from each exposed metal parts of the cabinet , particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.)Alternate check methodPlug the AC line c
12、ord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor between an exposed metal part and a known good earth ground.Measure the AC voltage across the resistor w
13、ith the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now reverse the plug in the AC outlet and repeat each measurement voltage measured any must not exce
14、ed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE!CAUTIONBurrs formed during molding may be left over on some parts of the chassis. Therefore, pay a
15、ttention to such burrs in the case of preforming repair of this system.XR-D400SL1-3Technical descriptionCD-R/RW recorder for digital audio CD-R/RW drive for PCFig. 1 Fig. 2Table 1 Comparison of Recording and PlaybackAs its name implies, the XR-D400SL Multiple Compact Disc Recorder provides multiple
16、functions, these include a CD-R/RW recorder for digital audio and a CD-R/RW drive for a PC.As the XR-D400SL can be used as a CD-R/RW recorder for digital audio in the dubbing/ recording modes, it is classified as specific equipment under the private recording royalties system. As a result, discs rec
17、orded with this recorder are distinguished from those recorded with a PC drive.In the SCSI mode, the XR-D400SL can be used as a CD-R/RW drive for a PC by connecting it through the SCSI interface. However, it is not possible to use the source disc tray as the dubbing source.The dubbing source disc tr
18、ay of the XR-D400SL incorporates a CD-ROM drive and a REC/PLAY disc tray, which is the dubbing destination and incorporates the CD-R/RW drive (XR-RWD400S) for a PC.The XR-RWD400S can also be used as a CD-R/RW recorder for digital audio according to the setting of the control microcomputer.The XR-RWD
19、400S incorporates a flash memory to facilitate firmware read and write. The firmware is the program used in controlling the drive.The use of a flash memory makes it possible to rewrite programs easily.The recording media royalties are limited to special discs (with a logo mark as shown in Fig. 1) co
20、ntaining the recording of ID information, which are not recorded in the recording media for PCs.XR-D400SLConfiguration of the XR-D400SLCD-R/RW recorder for digital audioRecording PlaybackCD-R/RW recorder for digital audio Possible with discs having a logo as in Fig. 1 only Possible with discs having
21、 a logo as in Figs. 1 and 2CD-R/RW drive for PC Possible with discs having a logo as in Figs. 1 and 2 Possible with having a logo as in Figs. 1 and 2XR-D400SL1-4The XR-D400 incorporates the SCMS (Serial Copy Management System) and the RID (Recorder Unique Identifier) functions.SCMS is used to limit
22、digital copies to one generation only. The principles are shown in Fig. 3.With RID, the RID codes are written into discs which are as specified in the Orange Book Parts II and III. The codes contain the manufacturers name, product name and machine number to enable the tracing of illegal copies.Digit
23、al recording Digital recordingFig. 3 Principles of SCMSFig. 4 shows the structure of a CD-R disc.In recording, a laser beam having the same wavelength as the CD beam (780 nm) but of tens times higher power is irradiated from the substrate surface to the groove.This irradiation causes thermal deforma
24、tion of the organic pigment layer forming pits in it.The organic pigments include cyanine, phtalocyanine and azoic dyes and the reflective layer uses gold or silver materials.In playback the laser beam reads the pits recorded in the pregroove.The thermal deformation of the organic pigment layer cann
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