JVC-CAMXKC68-cs-sm维修电路原理图.pdf

《JVC-CAMXKC68-cs-sm维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《JVC-CAMXKC68-cs-sm维修电路原理图.pdf（61页珍藏版）》请在收音机爱好者资料库上搜索。

1、SERVICE MANUAL COPYRIGHT 2008 Victor Company of Japan, Limited No.MB664 2008/8 COMPACT COMPONENT SYSTEM MB66420088 SERVICE MANUAL MX-KC68J, MX-KC68C, MX-KC68B, MX-KC68E, MX-KC68EN, MX-KC68EV, MX-KC68A, MX-KC68UJ, MX-KC68UW, MX-KC38J, MX-KC38C COPYRIGHT 2008 Victor Company of Japan, Limited Lead free

2、 solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade) TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、 . . . . . . . . . . . . . . . . . . . . 1-5 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . 1-8 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5、. . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 SP-MXKC38 SP-MXKC68F SP-MXKC38 SP-MXKC68F SP-MXKC68W CA-MXKC38 CA-MXKC68 (MX-KC68B,E,EN,EV) RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB664) SPECIFICATION MX-KC68J/C/MX-KC38J/C Specifications and appearance are subject to change without prior notice. Am

6、plifier section OUTPUT POWER Main speakers110 W per channel min. RMS driven into 3 at 1 kHz with no more than 10% total harmonic distortion Speakers/Impedance 3 - 6 Subwoofer (for MX-KC68)180 W per channel min. RMS driven into 8 at 63 Hz with no more than 10% total harmonic distortion Speakers/Imped

7、ance 8 - 16 Tuner section FM tuning range 87.5 MHz - 108.0 MHz AM tuning range 530 kHz - 1 710 kHz CD player section Dynamic range 90 dB Signal-to-noise ratio 85 dB Wow and flutter Immeasurable Main speakers (MX-KC68/SP-MXKC38) Type 3-Way 3-Speaker Bass-Reflex Type Speaker unitsMain Woofer 16 cm (6-

8、5/16 inches) cone x 1 Mid Range 5 cm (2 inches) cone x 1 Tweeter 2 cm (13/16 inches) dome x 1 Power Handling Capacity 110 W Impedance 3 Frequency Range 41 Hz - 35 kHz Sound Pressure Level 83 dB/Wm Dimensions (approx.) 210 mm x 315 mm x 220 mm (W/H/D) (8-5/16 inches x 12-7/16 inches x 8-11/16 inches)

9、 Mass (approx.) 3.0 kg (6.7 lbs) each Subwoofer (MX-KC68) Type 1-Way Bass-Reflex Type Speaker 16 cm (6-5/16 inches) cone x 1 Power Handling Capacity 180 W Impedance 8 Frequency Range 38 Hz - 5 kHz Sound Pressure Level 83 dB/Wm Dimensions (approx.) 210 mm x 315 mm x 242 mm (W/H/D) (8-5/16 inches x 12

10、-7/16 inches x 9-9/16 inches) Mass (approx.) 3.4 kg (7.5 lbs) General Power requirements AC 120 V , 60 Hz Audio input AUDIO IN 400 mV/47 k Power supply to iPod DC 5 V 500 mA Power consumption 95 W (MX-KC68) - power on 60 W (MX-KC38) - power on 9 W - standby mode, without charging iPod 0.9 W or less

11、- save mode Dimensions (W x H x D) 215 mm x 307 mm x 309 mm (8-1/2 inches x 12-1/8 inches x 12-3/16 inches) Mass (approx.) 3.8 kg (8.4 lbs) (MX-KC68) 3.6 kg (8.0 lbs) (MX-KC38) RadioFans.CN 收音机爱 好者资料库 (No.MB664)1-3 MX-KC68B/E/EN/EV Specifications and appearance are subject to change without prior no

12、tice. Amplifier section OUTPUT POWERMain speakers110 W per channel min. RMS driven into 3 at 1 kHz with no more than 10% total harmonic distortion Speakers/Impedance: 3 - 6 Subwoofer180 W min. RMS driven into 8 at 63 Hz with no more than 10% total harmonic distortion Speakers/Impedance: 8 - 16 Tuner

13、 sectionFM tuning range87.50 MHz - 108.00 MHz AM tuning range522 kHz - 1 629 kHz CD player sectionDynamic range86 dB Signal-to-noise ratio85 dB Wow and flutterImmeasurable Speakers Main speakers (SP-MXKC68F) Type3-Way 3-Speaker Bass-Reflex Type Speaker unitsMain Woofer16 cm cone x 1 Mid Range5 cm co

14、ne x 1 Tweeter2 cm dome x 1 Power Handling Capacity 110 W Impedance3 Frequency Range41 Hz - 35 kHz Sound Pressure Level83 dB/Wm Dimensions (approx.)210 mm x 315 mm x 220 mm (W/H/D) Mass (approx.)3.0 kg each Subwoofer (SP-MXKC68W) Type1-Way Bass-Reflex Type Speaker16 cm cone x 1 Power Handling Capaci

15、ty 180 W Impedance8 Frequency Range38 Hz - 5 kHz Sound Pressure Level83 dB/Wm Dimensions (approx.)210 mm x 315 mm x 242 mm (W/H/D) Mass (approx.)3.4 kg General Power requirementsAC 230 V , 50 Hz Audio input AUDIO IN400 mV/47 k Power supply to iPodDC 5 V 500 mA Power consumption95 W - power on 9 W -

16、standby mode, without charging iPod 0.8 W or less - save mode Dimensions (W x H x D)215 mm x 307 mm x 309 mm Mass (approx.)3.8 kg 1-4 (No.MB664) MX-KC68A/UJ/UW Specifications and appearance are subject to change without prior notice. Amplifier section OUTPUT POWERMain speakers110 W per channel min.

17、RMS driven into 3 at 1 kHz with no more than 10% total harmonic distortion Speakers/Impedance: 3 - 6 Subwoofer180 W per channel min. RMS driven into 8 at 63 Hz with no more than 10% total harmonic distortion Speakers/Impedance: 8 - 16 Tuner section FM tuning range87.50 MHz - 108.00 MHz AM tuning ran

18、ge531 kHz - 1 710 kHz (at 9 kHz intervals) 530 kHz - 1 710 kHz (at 10 kHz intervals) CD player section Dynamic range86 dB Signal-to-noise ratio85 dB Wow and flutterImmeasurable Speakers Main speakers (SP- MXKC68F) Type3-Way 3-Speaker Bass-Reflex Type Speaker unitsMain Woofer16 cm cone x 1 Mid Range5

19、 cm cone x 1 Tweeter2 cm dome x 1 Power Handling Capacity 110 W Impedance3 Frequency Range41 Hz - 35 kHz Sound Pressure Level83 dB/Wm Dimensions (approx.)210 mm x 315 mm x 220 mm (W/H/D) Mass (approx.)3.0 kg each Subwoofer (SP-MXKC68W) Type1-Way Bass-Reflex Type Speaker16 cm cone x 1 Power Handling

20、Capacity 180 W Impedance8 Frequency Range38 Hz - 5 kHz Sound Pressure Level83 dB/Wm Dimensions (approx.)210 mm x 315 mm x 242 mm (W/H/D) Mass (approx.)3.4 kg General Power requirements For AustraliaAC 240 V , 50 Hz For other countriesAC 110 V-127 V/AC 220 V-240 V adjustable with the voltage selector

21、 50 Hz/60 Hz Audio input AUDIO IN400 mV/47 k Power supply to iPodDC 5 V 500 mA Power consumption95 W - power on 9 W - standby mode, without charging iPod 0.8 W or less - save mode Dimensions (W x H x D)215 mm x 307 mm x 309 mm Mass (approx.)3.8 kg (No.MB664)1-5 SECTION 1 PRECAUTION 1.1Safety Precaut

22、ions (1) This design of this product contains special hardware and many circuits and components specially for safety purpos- es. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those u

23、sed in the original circuits. Services should be per- formed 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 additions will void the manufacturers warranty a

24、nd 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 characteris- tics are often not evident from visual inspection nor can the

25、 protection afforded by them necessarily be obtained by us- ing replacement components rated for higher voltage, watt- age, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Ser- vice Manual. Electrical components having such features are iden

26、tified 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 charac- teristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards. (

27、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 required, the original lead routing and

28、 dress should be observed, and it should be confirmed that they have been returned to normal, after reassem- bling. (5) Leakage shock hazard testing After reassembling the product, always perform an isola- tion check on the exposed metal parts of the product (an- tenna terminals, knobs, metal cabine

29、t, 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 a Leakage Current Tester, measure the leakage current

30、 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. Any 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 voltmet

31、er 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- 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

32、 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 exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA A

33、C (r.m.s.). 1.2Warning (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) Repairs must be made in accordance with the relevant safety standards. (4)

34、 It is essential that safety critical components are replaced by approved parts. (5) If mains voltage selector is provided, check setting for local voltage. 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

35、- 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 the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the mark nearby are cri

36、tical 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 Except 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

37、) 1500 10W 0.15 F AC TYPE 1-6 (No.MB664) 1.5Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing r

38、epairs. 1.5.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products. Be careful to use proper grounding in the area where repairs are being performed. (1) Ground the workbench Ground the wo

39、rkbench 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) 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

40、 maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, 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

41、optical pickup. The testers internal power source can easily destroy the laser diode. 1.6Handling the traverse unit (optical pickup) (1) Do not subject the 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 ni

42、ppers, etc. after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing 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

43、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. 1.7Attention when traverse unit is decomposed *Please refer to Disassembly method in the text for the pickup unit. Apply solder to the short land sections

44、 before the card wire is disconnected from the connecto on the servo board. (If the card wire is disconnected without applying solder, the pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land sections after connecting the card wire. 1M Conduct

45、ive material (conductive sheet) or iron palate (caption) Anti-static wrist strap Solder short land section (No.MB664)1-7 1.8Important for laser products 1.CLASS 1 LASER PRODUCT 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiation when open. Do not stare into beam. (Others) Visi

46、ble and/or invisible class 1M laser radiation when open. Do not view directly with optical instruments. 3.CAUTION : Visible and/or invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. 4.CAUTION : This laser product uses visible and/or invisible laser

47、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 safety switches. 5.CAUTION : If safety switches malfunction, the laser is able to function. 6.CAUTION : Use

48、of controls, adjustments or performance of procedures other than those specified here in may result in hazardous radiation exposure. REPRODUCTION AND POSITION OF LABELS and PRINT ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. WARNING

49、 LABEL and PRINT 1-8 (No.MB664) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS New CD mechanism was added. In a model using new CD mechanism for, it stick a blue label for identification on the back side. When it repair the CD mechanism of an article sticking this label on, please use a parts list of FMU-VK1-2M. SECTION 3 DISASSEMBLY 3.1Main body (Used figure are MX-KC68J) 3.1.1Removing the Metal cover (See Fig.1, 2) (1) Remove the six screws A attaching the Metal cover. (See Fig.1) (2) Remove the four screws B attaching the bot