JVC-RCEX31A-cs-sch维修电路原理图.pdf

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1、SERVICE MANUAL CD PORTABLE SYSTEM RC-EZ31A No: 28225 JAN. 2006 COPYRIGHT 2006 JVC ASIA PTE LTD Area Suffix US - Asia UX - Middle East A - Australia SERVICE POLICY No service part is available for this model. Based on One to One exchange policy. Contents Safety precaution .2 Preventing static electri

2、city .3 Disassembly procedure.4 Flow of function operation until TOC read .5 Voltage charts .6 Block diagram .8 Wiring connection .9 Schematic diagrams. 11 Illustration of packing and parts list.18 RadioFans.CN 收音机爱好者资料库 XL-SV320SL/SV305GD XL-SV308BU 2 RC-EZ31 1.This design of this product contains

3、 special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made ti the original design unless authorised in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should b

4、e performed by qualified personel 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 additions will void the manufacturers warranty and will further relieve the manufacturer of respons

5、ibility for personal injury or property damage resulting 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 by them necessarily be obtain by u

6、sing replaement components rated for higher voltage, the Parts List 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 substitute repalcement which does not have the same saf

7、ety characteristics as the recommended replacement parts 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,

8、moving parts and/or sharp edges for the prevention of electric 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, after re-assembling. 5.Leakage current check (Electrical Shock ha

9、zard testing) After re-assembling the product, always perform 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

10、 use a line isloation transformer during this check. Plug the AC line cord directly into the AC outlet. Using a Leakage Current Tester, measure the leakage current from each ecposed metal parts of the cabinet, particularly and exposed metal part having a return path to the chassis, to a known good e

11、arth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.) Alternate check method Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitvity in the following manner. Connect a 1,500 ohm 10W resistor paralleled by a 0.15uF AC-type cap

12、acitor between an exposed metal part and a known good earth ground. Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly and exposed metal part having a return path to te chassis and measure the AC voltage across the

13、resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Voltage measured Any must not exceed 0.75 V AC (r.m.s.). This corresponds to 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

14、of the repairer to ensure that these safety standards are maintained. 3.repairs 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. C

15、AUTIONBurrs formed during moulding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of performing repair of this system. Safety Precautions Warning RadioFans.CN 收音机爱好者资料库 RC-EZ31 3 Preventing static electricity Electrostatic discharge (ESD), which oc

16、curs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pcikup). Take care to prevent this when performing repairs. 1.1. Grounding to prevent damage by static electricity Static electricity in the work area can destroy th

17、e optical pickup (laser diode) in devicessuch as DVD players. Be careful to use proper grounding in the area where repairs are being performed. 1.1.1. Gound the workbench 1. Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the tr

18、averse unit (optical pickup) on it. 1.1.2. Ground yourself 1.Use an anti-static wrist starp to release and static electricity built up in your body. 1.1.3. Handling the optical pcikup 1. In order to maintain quality during transport and before installation, both sides of the laser diode on the repla

19、cement optical pickup are storted. After replacement, return the shorted parts to their original condition. (Refer to the text.) 2. Do not use a tester to check the condition of the laserdiode in the optical pickup. The testers internal power source can easily destory the laser diode. 1.2. Handling

20、the traverse unit (optical pickup) 1.Do not subject the traverse unit (optical pcikup) to strong shocks, as it is a sensitive, complex unit. 2.Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the replacement procdeu

21、re in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching 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 adj

22、usts the laser power. Do not return it. XL-SV320SL/SV305GD XL-SV308BU 4 RC-EZ31 ? ? ? ? ?Disassembly Procedure Remove the back cabinet Screw A 1. Open battery cover and remove 3 screws on the bottom cabinet. (Screw A) 2. Remove 5 screws on back (Screw B) Screw B Remove the top panel 1. Remove 3 scre

23、ws to takeScrew C out the top panel with the board. (Screw C) Then the unit is disassembled RC-EZ31 5 Flow of functional operation until TOC read Check Point Check 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 F

24、ocus error Tracking error waveform at TOC readings-cuve signal at the pin16 of IC902 is approx.2V p-p Confirm that the signal from pin14 IC902 is 0V as a accelerated pulse during approx.400ms Confirm the waveform of the Tracking error signal at the pin14 of IC902 (See fig-1) Confirm the eys-pattern

25、at the lead of TP1 Power Key Slider turns REST SW ON. Automatic tuning of TE offset Laser ON Detection of disc Automatic tuning of Focus offset Automatic measurement of focus A-curve amplitude Disc is rotated Focus servo ON (Tracking servo ON) Automatic measurement of Tracking error amplitude Automa

26、tic tuning of Tracking error balance Automatic tuning of Focus error balance Automatic tuning of Focus error gain Automatic tuning of Tracking error gain TOC reading Play a disc pin 14 of IC902(TE) VREF Tracking servo off status Tracking servo on statues Disc to be braked to stop Disc status to rota

27、te TOC reading finishes 500mV/div 2mS/div Fig.1 Automatic measurement of TE amplitude and automatic tuning of TE balance Approx 1.8V Approx 3sec XL-SV320SL/SV305GD XL-SV308BU 6 RC-EZ31 ? ? ? ? ?Voltage Charts IC No. pin NO:1234567891011121314151617181920 Votage(v) 0.102.471.710.021.524.952.220.022.5

28、02.260.022.670.050.0511.310.024.942.512.510.02 pin NO:2122232425262728293031323334353637383940 Votage(v) 4.934.954.910.020.020.020.022.922.472.482.482.482.482.482.484.124.124.120.024.95 pin NO:4142434445464748495051525354555657585960 Votage(v) 4.934.934.934.930.100.074.914.944.950.024.944.324.931.98

29、3.960.001.980.020.022.12 pin NO: 61 62 63 64 Votage(v) 2.194.954.954.85 IC No. pin NO:1234567891011121314151617181920 Votage(v) 2.562.562.542.542.492.522.522.522.532.522.522.532.452.532.602.562.532.512.532.52 pin NO:2122232425262728293031323334353637383940 Votage(v) 2.520.022.482.482.482.532.772.522

30、.542.202.182.512.514.490.021.400.074.932.362.67 pin NO:4142434445464748495051525354555657585960 Votage(v) 2.332.452.272.500.022.522.530.000.082.474.914.940.024.850.024.942.522.532.392.41 pin NO:61626364 Votage(v) 2.233.790.224.94 IC No. Item1234567891011121314151617181920 DC12V3.553.132.152.156.605.

31、182.180.102.192.193.653.150.106.850.900.903.503.302.202.20 Item2122232425262728 DC12V7.347.342.202.202.203.403.400.10 IC No. pin NO:1234567891011121314151617181920 Votage(v) 0.850.000.315.440.515.635.105.630.000.000.674.861.081.085.634.680.701.620.555.63 pin NO:21222324 Votage(v) 5.635.635.635.63 IC

32、 No. pin NO:1234567891011121314151617181920 Votage(v) 0.000.001.045.610.125.644.985.640.000.610.645.071.081.085.645.640.701.131.035.64 pin NO:21222324 Votage(v) 5.675.645.645.64 IC No. pin NO:12345678910111213141516 Votage(v) 0.000.000.000.530.000.000.000.000.000.000.490.000.000.000.005.85 IC No. pi

33、n NO:12345678910111213141516 Votage(v) 0.000.000.000.000.000.000.000.003.980.000.000.000.000.000.005.82 IC No. pin NO:12345678910111213141516 Votage(v) 0.000.000.000.200.000.000.000.000.003.950.200.000.000.000.005.66 IC902 LC78601RE CD PLAY IC901 LA9242M CD PLAY IC902 MM1469 CD PLAY IC501 TC-4052 CD

34、 PLAY IC501 TC-4052 CASS PLAY IC101 SA2111 TUNER FM IC501 TC-4052 TUNER IC101 SA2111 TUNER AM RC-EZ31 7 IC No. pin NO:123456789101112 Votage(v)12.003.5611.900.000.570.000.000.573.9512.223.6413.30 IC No. pin NO:123456789101112 Votage(v)12.004.0011.800.000.570.000.000.574.3010.004.0013.30 IC No. pin N

35、O:123456789101112 Votage(v)11.103.5010.600.000.540.000.000.573.8210.68 3.37.7 11.60 IC No. pin NO:123456789 Votage(v) 1.770.001.780.000.008.091.780.001.78 EBCEBCEBCEBCEBCEBC 8.509.1111.960.000.700.000.000.000.700.000.000.000.000.000.000.000.000.00 EBCEBCEBCEBC 0.000.000.0011.93 11.200.024.900.000.00

36、0.000.700.00 EBCEBCEBCEBCEBCEBC 13.40 12.70 13.364.575.248.47 IC301 UTC8227 CD PLAY IC301 UTC8227 CASS PLAY IC301 UTC8227 TUNER Votage(v) Q401 D2061 CD PLAY IC201 BA3308 CASS PLAY Q329 9014 CDPLAY Q369 9014 CD PLAYTransistor No. Item Q301 1936 CD PLAYQ391 9015 CD PLAYQ392 9014 CD PLAY Transistor No.

37、Q302 1936 CD PLAY Q303 9015CD PLAYQ702 9014 CD PLAY Q305 9014CASSPLAY Votage(v) Q371 8050CD PLAYTransistor No.Q306 8550CASSPLAY Item Item Votage(v) XL-SV320SL/SV305GD XL-SV308BU 8 RC-EZ31 ? ? ? ? ?Block Diagram RC-EZ31 9 ? ? ? ? ? Wiring Connections (US/UX version) XL-SV320SL/SV305GD XL-SV308BU 10 R

38、C-EZ31 ? ? ? ? ? Wiring Connections (A version) RC-EZ31 11 ? ? ? ? ?Schematic Diagrams ? ? ? ? ? Main Circuit (US/UX Version) XL-SV320SL/SV305GD XL-SV308BU 12 RC-EZ31 ? ? ? ? ? Main Circuit (A Version) RC-EZ31 13 ? ? ? ? ? Tuner Circuit (US/UX Version) XL-SV320SL/SV305GD XL-SV308BU 14 RC-EZ31 ? ? ?

39、? ? Tuner Circuit (A Version) RC-EZ31 15 ? ? ? ? ? Cass Circuit XL-SV320SL/SV305GD XL-SV308BU 16 RC-EZ31 ? ? ? ? ? CD Circuit RC-EZ31 17 ? Control Circuit XL-SV320SL/SV305GD XL-SV308BU 18 RC-EZ31 ? Illustraction of packing and parts list (US/UX Version) Item Parts Name U Part No.UX Parts No.Item Par

40、ts Name U Part No.UX Parts No. P.1Poly Form(Left) P.2Poly Form(Right) P.3Power Cord Set151-230230-002151-230230-002 P.4Conversion Plug 159-110220-009/ 159-110220-019(#Alt) P.5Poly Bag P.6Main Unit P.7Poly Bag P.8 Instruction Manual P.9Poly Bag P.10Remote Control Unit P.11Poly Bag P.12Gift Box(G/B) P

41、.13G/B Bar Code Label612-080350-000612-080348-000 P.14Battery AAA x 2pcs P.15POP Label Remarks: #Alt items will be used alternatively depends on the lead time. 163-200415-900 676-070100-040 629-080284-000 JVC:LVT1524-001A&LVT1524-002A RM-SRCEZ31A JVC:LVT1524-001A&LVT1524-002A RM-SRCEZ31A 891-EZ3111-

42、010 874-310000-000 874-310000-000 676-040130-044 678-255175-040 P12 P1 P8 P9 P2 P6 P7 P14 P11 P10 P13 PROGRAM REPEAT REMOTE SENSOR CD PORTABLE SYSTEM RC-EZ31 REMOTE CONTROL UNIT RM-SRCEZ31 A SKIP/SEARCH REPEATPROGRAM P15 P4 P5 P3 RC-EZ31 19 Item Parts Name Part No. P.1Poly Form(Left)874-310000-000 P

43、.2Poly Form(Right)874-310000-000 P.3Power Cord Set151-240230-202 P.4Poly Bag 676-040130-044 P.5Main Unit P.6Poly Bag 678-255175-040 P.7Instruction ManualJVC: LVT1524-003A P.8Poly Bag 676-070100-040 P.9Remote Control Unit P.10Poly Bag RM-SRCEZ31A P.11G/B Bar Code Label612-080352-000 P.12Gift Box(G/B)

44、891-EZ3111-020 P.13Battery AAA x 2pcs163-200415-900 ? Illustraction of packing and parts list (A Version) P11 P1 P7 P8 P2 P5 P6 P13 P10 P9 P4 P3 P12 PROGRAM REPEAT REMOTE SENSOR CD PORTABLE SYSTEM RC-EZ31 REMOTE CONTROL UNIT RM-SRCEZ31 A SKIP/SEARCH REPEATPROGRAM JVC Asia Pte Ltd 101 Thomson Road, #28-04 United Squares, Singapore 307591 (No: 28225) Printed in Singapore 200601(L)