JVC-XLPM11-cd-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL PORTABLE CD PLAYER No.21018 Jul. 2001 COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD. COMPACT DIGITAL AUDIO COMPACT DIGITAL AUDIO REPEAT/ RANDOM HBS +10 GROUP ESP RESUME Volume DC IN 4.5V OPEN Line Out Contents Safety Precautions Important for laser products Preventing static electricity

2、 Disassembly method Troubleshooting Explanation of MP3 Description of major ICs Parts list 1-2 1-3 1-4 1-5 1-7 1-8 1-9 1-13 18 XL-PM11/XL-PM1 XL-PM11/XL-PM1 Area Suffix XL-PM1 J - U.S.A. C - Canada B - U.K. E - Continental Europe XL-PM11 C - Canada Area Suffix XL-PM11 Gift box XL-PM1 Blister packPAC

3、KING Model XL-PM11 is an exclusive use for Canada. As for the difference between XL-PM11 and XL-PM1, the packing specification is different. RadioFans.CN 收音机爱 好者资料库 XL-PM11/XM-PM1 1-2 1. This design of this product contains special hardware and many circuits and components specially for safety purpo

4、ses. 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 used in the original circuits. Services should be performed by qualified personnel only. 2. Alterations of the design or circ

5、uitry 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 manufacture of responsibility for personal injury or property damage resulting therefrom. 3. Many e

6、lectrical 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 obtained by using replacement components rated for higher voltage, wattage, etc. Repla

7、cement parts which have these special safety characteristics are identified in the Parts List of Service 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 n

8、ot have the same safety 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

9、 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 dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling. 5. Leakage currnet check

10、 (Electrical shock hazard testing) After re-assembling the product, always perform an isolation check on the exposed metal 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 ele

11、ctrical 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 from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the chass

12、is, to a known good earth 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 sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a

13、 0.15 F AC-type capacitor 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 any exposed metal part having a return path to the chassis, and meausre the A

14、C 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 AC (r.m.s.). 1. This equipment has been designed and manufactured to meet international safety standards. 2. It is th

15、e 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. It is essential that safety critical components are replaced by approved parts. 5. If mains voltage selector is provided, check se

16、tting for local voltage. 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 ! Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case o

17、f preforming repair of this system. 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 critical for safety. When rep

18、lacing them, be sure to use the parts of the same type and rating as specified by the manufacturer. (Except the J and C version) RadioFans.CN 收音机爱 好者资料库 XL-PM11/XM-PM1 1-3 Important for laser products 1.CLASS 1 LASER PRODUCT 2.DANGER : Invisible laser radiation when open and inter lock failed or def

19、eated. Avoid direct exposure to beam. 3.CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions. 4.CAUTION : The compact disc player uses invisible laserradiation and is equipped with safety switches which

20、prevent emission of radiation when the drawer is open and the safety interlocks have failed or are de feated. It is dangerous to defeat the safety switches. 5.CAUTION : If safety switches malfunction, the laser is able to function. 6.CAUTION : Use of controls, adjustments or performance of procedure

21、s other than those specified herein may result in hazardous radiation exposure. !CAUTION Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. WARNING LABEL DHHS LABEL CLASS 1 LASER PRODUCT (Cabinet -bottom) (Cabinet -door/ inside) Reproducti

22、on and position of labels B, E versionJ, C version RadioFans.CN 收音机爱 好者资料库 XL-PM11/XM-PM1 1-4 Preventing static electricity 1. Grounding to prevent damage by static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can des

23、troy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs. 2. About the earth processing for the destruction prevention by static electricity In the equipment which uses optical pick-up (laser diode), optical pick-up is destroyed by the static elec

24、tricity of the work environment. Be careful to use proper grounding in the area where repairs are being performed. 2-1 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

25、. 2-2 Ground yourself Use an anti-static wrist strap to release any static electricity built up in your body. 3. Handling the optical pickup 1. In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After re

26、placement, return the shorted parts to their original condition. (Refer to the text.) 2. 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. 4. Handling the traverse unit (optical pickup) 1. Do not

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

28、 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 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 turn it. C

29、onductive material (conductive sheet) or iron plate (caption) Anti-static wrist strap Flexible board CD mechanism assembly short-circuit land CON1 on the main board 1. 2. 3. Remove the door 3.3V? CHECK OSC. of XT701 -3.58MHz? CHECK VOLTAGE PIN NO. 11,12,13,18,56 of MICOM ;5V? CHECK VOLTAGE WAVEFORM

30、PIN NO.25 of MICOM CHECK CONNECTOR -COMPLETE? Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes NoNo No No No No No No No No No No No No No No No No No TOC READ -PLAY? CHECK ALL KEY FUNCTION CHECK ASP(9226) CIRCUIT CHECK VOLTAGE PIN No.24 of IC9226 ;DC LEVEL CHECK VOLTAGE P

31、IN No.1,2 of CON2 ;DC LEVEL CHECK VOLTAGE PIN No.2,3 of CON1 0.5V 3V CHECK VOLTAGE CONNECTOR PIN of Q301 2V? CHECK VOLTAGE PIN No.4,5 of CON2 ;DC LEVEL CHECK DRIVE IC(6508) CIRCUIT CHECK DRIVE IC 6508 AUDIO SIGNAL? CHECK SIGNAL WAVEFORM PIN No. 1,2 of EARPHONE JACK ;AUDIO SIGNAL? REPALCE EARPHONE JA

32、CK REPALCE LINE OUT JACK CHECK VOLTAGE PIN No. 58 of MICOM ; 0V(LOW) CHECK VOLTAGE COLLECTOR PIN of Q803 ; 0V(LOW) CHECK SIGNAL WAVEFORM PIN No. 1,2 of LINEOUT JACK ; AUDIO SIGNAL REPLACE MICOM MAX Explanation of MP3 An audio compression format that is part of the MPEG-1 specification, which was sta

33、ndardized by the Moving Picture Experts Group, a working group of ISO (International Organization for Standardization), in 1992. MPEG-1, which is used by VideoCDs, etc., refers to the international standard for audio/video compression technology and its format. The audio part of the standard is know

34、n as MPEG-1Audio (ISO/IEC 11172-3). MPEG-1 Audio is an audio coding system that can efficiently compress sound by discarding frequencies below the range of human hearing(1), as well as sound which is masked(2). MPEG-1Audio is divided into three layers: Layer 1, Layer 2 and Layer 3. The higher the La

35、yer number, the higher the compression rate and the better the sound quality. 32 kHz, 44.1 kHz and 48 kHz sampling rates are supported. Monaural and 2-channel stereo can be compressed to 32-448 kbps with Layer 1, 32-384 kbps with Layer 2 and 32-320kbps with Layer 3. The following is a summary of eac

36、h Layer: MP3 (MPEG-1 Audio Layer 3) Layer 3 To create efficiently compressed audio data that is perceptually the same as the original, the following modes have been added to Layer 2. MDCT (Modified Diskrete Cosine Transform) for subdivision of bandwidth. Huffman coding that assigns the short bit to

37、the data that frequently appears, and the long bit to the data that does not appear much. MS (Middle/Side) stereo coding(3) that divides the stereo signal into the sum signal (L+R) and the difference signal (L-R). (1) The human ear cannot detect sound above or below 3 kHz in the silent situation. (2

38、) Auditory masking is the phenomenon where low-frequency sound that occurs immediately after a loud sound cannot be heard by the human ear. (3) Joint stereo coding that compresses 2 channels separately or recognizes only the scale factor of each channel that is compressed by monaural encoding is use

39、d in Layer 1 and 2. XL-PM11/XM-PM1 1-9 1K 20K 20K 1K20K 20K 3.75K 20K 20K 1. Block diagram BH6508FS (IC6508) : Motor driver Description of major ICs 1 2 3 4 5 6 7 8 910 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 - + - +- + - + 2. Pin function Pin No. 1 2 3 4 5 6 7 8 9 10 11 12

40、 13 14 15 16 Symbol MUTE 4 CT IN 1 CN 1 POWGND 1 OUT_IF POWVCC 1 OUT_1R POWGND12 OUT_2R POWVCC2 OUT_2F POWGND 2 CN 2 IN 2 VREF Function Mute terminal Triangular wave output terminal CH1 Control signal input terminal CH1 Feedback filter terminal Ground for power and analog block CH1 Non-inverted outp

41、ut terminal Vcc for power block CH1 Inverted output terminal Ground for power block CH2 Inverted output terminal Vcc for power block CH2 Non-inverted output terminal Ground for power and digital block CH2 Feedback filter terminal CH2 Control signal input terminal Reference voltage input terminal Pin

42、 No. 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Symbol VCC VG IN3 CN3 POWGND3 OUT_3F POWVCC3 OUT_3R POWGND34 OUT_4R POWVCC4 OUT_4F CN4 IN4 POWGND4 CLK Function Control circuit power supply Pre-drive circuit power supply CH3 Control signal input terminal CH3 Feedback filter terminal Ground for p

43、ower block CH3 Non-inverted output terminal Vcc for power block CH3 inverted output terminal Ground for power block CH4 inverted output terminal Vcc for power block CH4 Non-inverted output terminal CH4 Feedback filter terminal CH4 Control signal input terminal Ground for power block External clock i

44、nput terminal Note: Nin-inverted output and inverted output if driver are the polarity to an input terminal. NF Amp. NF Amp. NF Amp. NF Amp. SAW OSC LOGIC 4 LOGIC 1 LOGIC 3 LOGIC 2 H BRIDGE 4 H BRIDGE 1 H BRIDGE 3 H BRIDGE 2 PRE DRIVER 4 PRE DRIVER 1 PRE DRIVER 2 Thermal shut down PRE DRIVER 3 MUTE

45、4 F R F RR F VG VREFCT CLK VCC XL-PM11/XM-PM1 1-10 KS9288 (IC9288) : DSP/ ESP 2. Pin function (1/2) Symbol VDD_PLL VSSA_PLL VBBA_PLL VCO1LF VCO2LF VSSD_PLL VDDD_PLL PBCK VDDD1 XIN XOUT VSSD1 TEST0 EFMI LOCK SMEF SMON SMDP SMDS WDCK VDDD2 TESTV WFCK LKFS RESETB MLT MDAT MCK ISTAT S0S1 SQCK SQDT LCHOU

46、T VDDA_DAC VHALF VREF VSSA_DAC RCHOUT VDDD_DAC VSSD_DAC TEST1 TEST2 TEST3 MUTE SBCK SBDT C4M VSSD2 VDDD3 DATX JITB C2PO 120 2140 4160 8061 1.Pin layout Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

47、 51 52 I/O - - - O O - - - - I O - I I O O O O O O - I O O I I I I O I/O I O O - O O - O - - I I I I I I/O O - - O I/O I/O Function Analog Power for DPLL Analog Ground for DPLL Analog Bulk Bias Ground for DPLL Pump out for VCO1 Pump out for VCO2 Digital Ground Separated Bulk Bias for DPLL Digital Po

48、wer Separated Bulk Bias for DPLL VCO1/2 clock output (4.3218MHz) Digital Power Xtal oscillator input (16,9344MHz) Xtal oscillator output Digital Power Test input EFM signal input CLV Servo locking status output LPF time constant control of the spindle servo error signal ON/OFF control signal for spi

49、ndle servo Phase control output for Spindle Motor drive Speed control output for Spindle Motor drive Word clock output (X1: 88.2KHz, X2: 176.4KHz) Digital Power Various Test input Write base clock output The Lock status output of frame sync System Reset at L Latch signal input from Micom Serial data input from Micom Serial data receiving clock input from Mic