Jvc-RCEZ-31-A-Service-Manual电路原理图.pdf

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1、SERVICE MANUALCD PORTABLE SYSTEMRC-EZ31ANo: 28225JAN. 2006COPYRIGHT 2006 JVC ASIA PTE LTDArea SuffixUS - AsiaUX - Middle EastA - AustraliaSERVICE POLICYNo service part is available for this model.Based on One to One exchange policy.ContentsSafety precaution .2Preventing static electricity .3Disassem

2、bly procedure.4Flow of function operation until TOC read .5Voltage charts .6Block diagram .8Wiring connection .9Schematic diagrams . 11Illustration of packing and parts list .18XL-SV320SL/SV305GDXL-SV308BU2RC-EZ311. This design of this product contains special hardware and many circuits and componen

3、ts specially forsafety purposes. For continued protection, no changes should be made ti the original design unlessauthorised in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personel only.2. Alterati

4、ons 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 additions will void the manufacturers warrantyand will further relieve the manufacturer of responsibility for personal injury or property damageresult

5、ing therefrom.3. Many eletrical and mechanical parts in the products have special safety-related characteristics.These characteristics are often not evident from visual inspection nor can the protection afforded bythem necessarily be obtain by using replaement components rated for higher voltage, th

6、e PartsList of Service manual. Electrical components having such features ate identified by the shading on the schematics and by ( ! ) on the parts List in the Service Manual. The use of a substituterepalcement which does not have the same safety characteristics as the recommended replacement parts

7、shown in the Parts List of Service manual may create 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 temperatures parts, moving parts and/or sharp edges for the prevention of ele

8、ctric shcok and fire hazard. When service is required, the original leat routing and dress should be observed, and it should be confirmed that they have been returned to normal, afterre-assembling.5. Leakage current check (Electrical Shock hazard testing)After re-assembling the product, always perfo

9、rm an isolation check on the exposed metap Parts 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 isloation transformer during this check.Plug the

10、AC line cord directly into the AC outlet. Using a “Leakage Current Tester“, measure theleakage current from each ecposed metal parts of the cabinet, particularly and exposed metalpart having a return path to the chassis, to a known good earth ground. Any leakage current mustnot exceed 0.5mA AC (r.m.

11、s.)Alternate check methodPlug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms pervolt or more sensitvity in the following manner. Connect a 1,500 ohm 10W resistor paralleled by a0.15uF AC-type capacitor between an exposedmetal part and a known good earth ground.M

12、easure the AC voltage across the resistor withthe AC voltmeter.Move the resistor connection to each exposedmetal part, particularly and exposed metal parthaving a return path to te chassis andmeasure the AC voltage across the resistor. Now,reverse the plug in the AC outlet and repeateach measurement

13、. Voltage measured Any mustnot exceed 0.75 V AC (r.m.s.). This correspondsto 0.5 mA AC (r.m.s.).1. This equipment has been designed and manufactured to meet international safety standards.2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.3. repair

14、s must be made in accordance with the relevant safety standards.4. It is essential that safety critical components are replaced by approved parts.5. It mains voltage selector is provided, check setting for local voltage.CAUTION Burrs formed during moulding may be left over on some parts of the chass

15、is. Therefore,pay attention to such burrs in the case of performing repair of this system.Safety PrecautionsWarningRC-EZ313Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged,can destroy the laser diode in th

16、e traverse unit (optical pcikup). Take care to prevent this when performing repairs.1.1. Grounding to prevent damage by static electricityStatic electricity in the work area can destroy the optical pickup (laser diode) in devicessuch as DVD players.Be careful to use proper grounding in the area wher

17、e repairs are being performed.1.1.1. Gound the workbench1. Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate overit before placing the traverse unit (optical pickup) on it.1.1.2. Ground yourself1. Use an anti-static wrist starp to release and static ele

18、ctricity built up in your body.1.1.3. Handling the optical pcikup1. In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are storted. After replacement, return the shorted parts to their original condition.(Refer to th

19、e text.)2. Do not use a tester to check the condition of the laserdiode in the optical pickup. The testers internal powersource can easily destory the laser diode.1.2. Handling the traverse unit (optical pickup)1. Do not subject the traverse unit (optical pcikup) to strong shocks, as it is a sensiti

20、ve, complex unit.2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specificdetails, refer to the replacement procdeure in the text. Remove the anti-static pin when replacing the traverseunit. Be careful not to take too long a time when atta

21、ching itto the connector.3. Handle the flexible cable carefully as it may break when subjected to strong force.4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not return it.XL-SV320SL/SV305GDXL-SV308BU4RC-EZ31null Disassembly ProcedureRemove the back cabinetS

22、crew A1. Open battery cover and remove3 screws on the bottom cabinet. (Screw A)2. Remove 5 screws on back(Screw B)Screw BRemove the top panel1. Remove 3 screws to take Screw Cout the top panel with the board. (Screw C)Then the unit is disassembledRC-EZ315Flow of functional operation until TOC readCh

23、eck PointCheck that the voltage at the pin 63 of IC902 is OV (a moment)?Check that the voltage at the pin1 of IC902 + side is + 5V?Confirm that the Focus errorTracking error waveform at TOC reading s-cuve signal at the pin16 ofIC902 is approx.2V p-pConfirm that the signal frompin14 IC902 is 0V as aa

24、ccelerated pulse duringapprox.400msConfirm the waveform ofthe Tracking error signalat the pin14 of IC902 (See fig-1)Confirm the eys-patternat the lead of TP1Power KeySlider turns RESTSW ON.Automatic tuningof TE offsetLaser ONDetection of discAutomatic tuning ofFocus offsetAutomatic measurement offoc

25、us A-curve amplitudeDisc is rotatedFocus servo ON(Tracking servo ON)Automatic measurement ofTracking error amplitudeAutomatic tuning ofTracking error balanceAutomatic tuning ofFocus error balanceAutomatic tuning ofFocus error gainAutomatic tuning ofTracking error gainTOC readingPlay a discpin 14 ofI

26、C902(TE)VREFTrackingservooff statusTrackingservoonstatuesDisc to bebraked tostopDisc statusto rotateTOC readingfinishes500mV/div2mS/div Fig.1Automatic measurementof TE amplitude andautomatic tuning ofTE balanceApprox1.8VApprox 3secXL-SV320SL/SV305GDXL-SV308BU6RC-EZ31null Voltage ChartsIC No.pin NO:

27、123456789101121314151617181920Votage(v) 0.10 2.47 1.71 0.02 1.52 4.95 2.22 0.02 2.50 2.26 0.02 2.67 0.05 0.05 11.31 0.02 4.94 2.51 2.51 0.02pin NO: 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40Votage(v) 4.93 4.95 4.91 0.02 0.02 0.02 0.02 2.92 2.47 2.48 2.48 2.48 2.48 2.48 2.48 4.12 4.1

28、2 4.12 0.02 4.95pin NO: 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60Votage(v) 4.93 4.93 4.93 4.93 0.10 0.07 4.91 4.94 4.95 0.02 4.94 4.32 4.93 1.98 3.96 0.00 1.98 0.02 0.02 2.12pin NO: 61 62 63 64Votage(v) 2.19 4.95 4.95 4.85IC No.pin NO: 123456789101121314151617181920Votage(v) 2.56 2

29、.56 2.54 2.54 2.49 2.52 2.52 2.52 2.53 2.52 2.52 2.53 2.45 2.53 2.60 2.56 2.53 2.51 2.53 2.52pin NO: 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40Votage(v) 2.52 0.02 2.48 2.48 2.48 2.53 2.77 2.52 2.54 2.20 2.18 2.51 2.51 4.49 0.02 1.40 0.07 4.93 2.36 2.67pin NO: 41 42 43 44 45 46 47 48

30、 49 50 51 52 53 54 55 56 57 58 59 60Votage(v) 2.33 2.45 2.27 2.50 0.02 2.52 2.53 0.00 0.08 2.47 4.91 4.94 0.02 4.85 0.02 4.94 2.52 2.53 2.39 2.41pin NO: 61 62 63 64Votage(v) 2.23 3.79 0.22 4.94IC No.Item 123456789101121314151617181920DC12V 3.55 3.13 2.15 2.15 6.60 5.18 2.18 0.10 2.19 2.19 3.65 3.15

31、0.10 6.85 0.90 0.90 3.50 3.30 2.20 2.20Item 21 22 23 24 25 26 27 28DC12V 7.34 7.34 2.20 2.20 2.20 3.40 3.40 0.10IC No.pin NO: 123456789101121314151617181920Votage(v) 0.85 0.00 0.31 5.44 0.51 5.63 5.10 5.63 0.00 0.00 0.67 4.86 1.08 1.08 5.63 4.68 0.70 1.62 0.55 5.63pin NO: 21 22 23 24Votage(v) 5.63 5

32、.63 5.63 5.63IC No.pin NO: 123456789101121314151617181920Votage(v) 0.00 0.00 1.04 5.61 0.12 5.64 4.98 5.64 0.00 0.61 0.64 5.07 1.08 1.08 5.64 5.64 0.70 1.13 1.03 5.64pin NO: 21 22 23 24Votage(v) 5.67 5.64 5.64 5.64IC No.pin NO: 1234567891011213141516Votage(v) 0.00 0.00 0.00 0.53 0.00 0.00 0.00 0.00

33、0.00 0.00 0.49 0.00 0.00 0.00 0.00 5.85IC No.pin NO: 1234567891011213141516Votage(v) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 3.98 0.00 0.00 0.00 0.00 0.00 0.00 5.82IC No.pin NO: 1234567891011213141516Votage(v) 0.00 0.00 0.00 0.20 0.00 0.00 0.00 0.00 0.00 3.95 0.20 0.00 0.00 0.00 0.00 5.66IC902 LC786

34、01RE CD PLAYIC901 LA9242M CD PLAYIC902 MM1469 CD PLAYIC501 TC-4052 CD PLAY IC501 TC-4052 CASS PLAY IC101 SA2111 TUNER FM IC501 TC-4052 TUNER IC101 SA2111 TUNER AM RC-EZ317IC No.pin NO: 12345678910112Votage(v) 12.00 3.56 11.90 0.00 0.57 0.00 0.00 0.57 3.95 12.22 3.64 13.30IC No.pin NO: 12345678910112

35、Votage(v) 12.00 4.00 11.80 0.00 0.57 0.00 0.00 0.57 4.30 10.00 4.00 13.30IC No.pin NO: 12345678910112Votage(v) 11.10 3.50 10.60 0.00 0.54 0.00 0.00 0.57 3.82 10.68 3.37.7 11.60IC No.pin NO: 123456789Votage(v) 1.77 0.00 1.78 0.00 0.00 8.09 1.78 0.00 1.78EBCEBCEBCEBCEBCEBC8.50 9.11 11.96 0.00 0.70 0.0

36、0 0.00 0.00 0.70 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00EBCEBC EBCEBC0.00 0.00 0.00 11.93 11.20 0.02 4.90 0.00 0.00 0.00 0.70 0.00EBCEBCEBCEBCEBCEBC13.40 12.70 13.36 4.57 5.24 8.47IC301 UTC8227 CD PLAYIC301 UTC8227 CASS PLAY IC301 UTC8227 TUNER Votage(v)Q401 D2061 CD PLAYIC201 BA3308 CASS PLAYQ

37、329 9014 CDPLAY Q369 9014 CD PLAYTransistor No.ItemQ301 1936 CD PLAYQ391 9015 CD PLAY Q392 9014 CD PLAYTransistor No. Q302 1936 CD PLAY Q303 9015CD PLAY Q702 9014 CD PLAY Q305 9014CASSPLAYVotage(v)Q371 8050CD PLAYTransistor No. Q306 8550CASSPLAYItemItemVotage(v)XL-SV320SL/SV305GDXL-SV308BU8RC-EZ31null Block DiagramRC-EZ319null Wiring Connections (US/UX version)XL-SV320SL/SV305GDXL-SV308BU10RC-EZ31null Wiring Connections (A version)