JVC-MXJE31-cs-sm维修电路原理图.pdf

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1、SERVICE MANUAL COPYRIGHT 2005 Victor Company of Japan, Limited No.MB385 2005/4 COMPACT COMPONENT SYSTEM MB38520054 MX-JE3,MX-JE31 TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2、 . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、. . . 1-7 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . . . . . 1-41 Area suffix US - Singapore UW - Brazil,Mexico,Peru UX - Saudi Arabia UY - Argentina UG - Turkey,South Africa,Egypt UE -Turkey UN - Asean MX-JE3 Area suffix UX - Saudi Arabia UG - Turkey,South Africa,Egypt UN - Asean MX-JE31 (CA-MXJE3)(SP-MXJE3)(SP-MXJE3) (CA-MXJE31)(SP-MXJE31)(S

5、P-MXJE31) RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB385) SPECIFICATION *1: Measured at 1 kHz, with tape recording signal 300 mV Design and specifications are subject to change without notice. Amplifier sectionOutput Power80 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 10% total harmonic

6、 distortion. Digital outputOPTICAL DIGITAL OUTPUT -21 dBm to -15 dBm (660 nm 30 nm) Audio input sensitivity/ Impedance*1 AUX300 mV/47 k MIC 1/23.0 mV/50 k VIDEO OUTColor systemNTSC/PAL selectable VIDEO (composite) 1 V(p-p)/75 S-VIDEOY (luminance) : 1 V(p-p)/75 C (chrominance, burst) : 0.286 V(p-p)/7

7、5 Speaker Terminals6 - 16 (Main speakers) Tuner sectionFM tuning range87.50 MHz - 108.00 MHz AM (MW) tuning range531 kHz - 1 710 kHz (at 9 kHz) 530 kHz - 1 710 kHz (at 10 kHz) For Saudi Arabia only531 kHz - 1 602 kHz (at 9 kHz) 530 kHz - 1 600 kHz (at 10 kHz) Disc player sectionPlayable discDVD Vide

8、o/CD/VCD/SVCD CD-R/CD-RW (recorded in Audio CD/ Video CD/ Super Video CD/ MP3/ WMA/ JPEG format) DVD-R/DVD-RW (recorded in video format) Dynamic range90 dB Horizontal resolution500 lines Wow and flutterImmeasurable Cassette deck section Frequency response Normal (type I)50 Hz - 14 000 Hz Wow and flu

9、tter0.15% (WRMS) GeneralPower requirementAC 110 V / AC 127 V / AC 220 V / AC 230 V - AC 240 V , (ad- justable with the voltage selector), 50 Hz / 60 Hz Power consumption125 W (at operation) (MX-JE3/JE31) 17 W (on standby) Dimensions (approx.)265 mm 335 mm 352 mm (W/H/D) Mass (approx.)8.0 kg Speakers

10、Type3-Way 3-Speaker Bass Reflex Type (Magnetically Shielded type) SpeakersWoofer15 cm cone 1 Midrange5 cm cone 1 Tweeter2 cm dome 1 Power handling capacity80 W Impedance6 Frequency range42 Hz - 29 000 Hz Sound pressure level83 dB/Wm Dimensions (approx.)JE31: 205 mm 335 mm 250 mm (W/H/D) JE3: 205 mm

11、335 mm 232 mm (W/H/D) Mass (approx.)JE31: 3.6 kg each JE3: 3.5 kg each RadioFans.CN 收音机爱 好者资料库 (No.MB385)1-3 SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of this product contains special hardware and many circuits and components specially for safety purpos- es. For continued protection

12、, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be per- formed by qualified personnel only. (2) Alterations of the design or circuitry of the product shoul

13、d 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 manufacture of responsibility for personal injury or property damage resulting therefrom. (3) Many electrical and mechanical

14、parts in the products have special safety-related characteristics. These characteris- tics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by us- ing replacement components rated for higher voltage, watt- age, etc. Replacement parts which

15、have these special safety characteristics are identified in the Parts List of Ser- vice Manual. Electrical components 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

16、safety charac- teristics 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 temperature p

17、arts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after reassem- bling. (5) Leakage shock hazard testing Afte

18、r reassembling the product, always perform an isola- tion check on the exposed metal parts of the product (an- tenna 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 isol

19、ation 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 exposed metal parts of the cabinet, particular- ly any exposed metal part having a return path to the chassis, to a known good earth ground. A

20、ny leakage cur- rent 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 per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15F AC-type capacitor between an ex

21、- posed 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 any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, r

22、everse 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.). 1.2Warning (1) This equipment has been designed and manufactured to meet international safety standards. (2) It is the legal responsibility o

23、f 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) If mains voltage selector is provided, check setting for local volta

24、ge. 1.3Caution Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of pre- forming repair of this system. 1.4Critical parts for safety In regard with component parts appearing on the silk-screen printed side (parts side) of th

25、e PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the mark nearby are critical for safety. When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer. (This regulation dose not E

26、xcept the J and C version) Good earth ground Place this probe on each exposed metal part. AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0.15 F AC TYPE 1-4 (No.MB385) 1.5Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in t

27、he body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs. 1.5.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devic

28、es such as laser products. Be careful to use proper grounding in the area where repairs are being performed. (1) Ground the workbench Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it. (2)

29、Ground yourself Use an anti-static wrist strap to release any static electricity built up in your body. (3) Handling the optical pickup In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacemen

30、t, return the shorted parts to their original condition. (Refer to the text.) Do not use a tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easily destroy the laser diode. 1.6Handling the traverse unit (optical pickup) (1) Do not subject t

31、he traverse unit (optical pickup) 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 procedure in the text. Remove the anti-static pin when rep

32、lacing the traverse unit. Be careful not to take too long a time when attaching it to the connector. (3) Handle the flexible cable carefully as it may break when subjected to strong force. (4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it. 1.7Atte

33、ntion when traverse unit is decomposed *Please refer to Disassembly method in the text for the pickup unit. Apply solder to the short land sections before the flexible wire is disconnected from the connecto on the servo board. (If the flexible wire is disconnected without applying solder, the pickup

34、 may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land sections after connecting the flexible wire. 1M Conductive material (conductive sheet) or iron palate (caption) Anti-static wrist strap Traverse mechanism assembly Pickup Short land section Card w

35、ire Connector (No.MB385)1-5 1.8Important for laser products 1.CLASS 1 LASER PRODUCT 2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. 3.CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Re

36、place the complete Laser Unit if it malfunctions. 4.CAUTION : The CD,MD and DVD player uses invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are defeated. It is dangerous to defeat the

37、safety switches. 5.CAUTION : If safety switches malfunction, the laser is able to function. 6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified here in may result in hazardous radiation exposure. REPRODUCTION AND POSITION OF LABELS CAUTION : Visible and I

38、nvisible laser radiation when open and interlock failed or defeated. AVOID DIRECT EXPOSURE TO BEAM. (e) VARNING : Synlig och osynling laserstrlning nr den ppnas och sprren r urkopplad. Betrakta ej strlen. (s) VARO : Avattaessa ja suojalukitus ohitettuna tai viallisena olet alttiina nkyvlle ja nkymtt

39、mlle lasersteilylle. Vlt steen kohdistumista suoraan itseesi. (f) ADVARSEL : Synlig og usynlig laserstrling nr maskinen er ben eller interlocken fejeler. Undg direkte eksponering til strling. (d) ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or operati

40、on check. CLASS 1 LASER PRODUCT CAUTION : Visible and Invisible laser radiation when open and interlock failed or defeated. AVOID DIRECT EXPOSURE TO BEAM. (e) VARNING : Synlig och osynling laserstrlning nr den ppnas och sprren r urkopplad. Betrakta ej strlen. (s) VARO : Avattaessa ja suojalukitus oh

41、itettuna tai viallisena olet alttiina nkyvlle ja nkymttmlle lasersteilylle. Vlt steen kohdistumista suoraan itseesi. (f) ADVARSEL : Synlig og usynlig laserstrling nr maskinen er ben eller interlocken fejeler. Undg direkte eksponering til strling. (d) WARNING LABEL 1-6 (No.MB385) SECTION 2 SPECIFIC S

42、ERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB385)1-7 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the metal cover (See Figs.1 to 3) (1) From the both sides of the main body, remove the two screws A attaching the metal cover. (See Figs.1 a

43、nd 2.) (2) From the back side of the main body, remove the six screws B attaching the metal cover. (See Fig.3.) (3) Remove the metal cover from the main body while lifting the rear section of the metal cover in the direction of the ar- row. (See Figs.1 and 2.) Fig.1 Fig.2 Fig.3 Metal cover A Metal c

44、over A Metal coverB BB 1-8 (No.MB385) 3.1.2Removing the front panel assembly (See Figs.4 to 7) Remove the metal cover. (1) From the right side of the main body, remove the screw C attaching the earth wires on the reverse side of the main board. (See Fig.4.) Reference: After attaching the earth wires

45、, fix them with a spacer as before. (See Fig.4.) (2) Remove the plastic rivet attaching the main board. (See Fig.4.) (3) From the inside of the main body, disconnect the card wires from the connectors (CN303, CN860, CN880) on the for- ward side of the main board. (See Fig.4.) (4) Remove the wire cla

46、mp fixing the wires and disconnect the wires from the connector (CN301, CN302) on the forward side of the main board. (See Fig.5.) Reference: After connecting the wires to the connectors, fix the wires with the wire clamp as before. (See Fig.5.) (5) From the left side of the main body, disconnect th

47、e parallel wire from the connector CN103 on the transformer board. (See Fig.5.) (6) Disconnect the wire from the connector CN119 on the transformer board. (See Fig.5.) Reference: After connecting the wire, pass the wire through the slot b of the holder board as before. (See Fig.5.) (7) Remove the ti

48、e band fixing the wire and disconnect the wire from the connector CN106 on the speaker terminal board. (See Fig.5.) Reference: After connecting the wire, fix the wire with a new tie band as before. (See Fig.5.) After connecting the wire, pass the wire through the slot b of the holder board as before. (See Fig.5.) (8) From the top side of the main body, remove the two screws D attaching the front panel assembly to the main body. (See Fig.6.) (9) From the bottom side of the main body, remove the three screws E and two screws F attaching the front panel as- sembly. (See Fig.7.) (10) Re