Jvc-XLPM-1-Service-Manual电路原理图.pdf

SERVICE MANUALPORTABLE CD PLAYERNo.21018Jul. 2001COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.COMPACTDIGITAL AUDIOCOMPACTDIGITAL AUDIOREPEAT/RANDOMHBS+10GROUPESPRESUMEVolumeDCIN4.5VOPENLine OutContentsSafety PrecautionsImportant for laser productsPreventing static electricityDisassembly method TroubleshootingExplanation of MP3Description of major ICsParts list1-21-31-41-51-71-81-91-13 18XL-PM11/XL-PM1XL-PM11/XL-PM1Area SuffixXL-PM1J - U.S.A.C - CanadaB - U.K.E - Continental EuropeXL-PM11C - CanadaArea SuffixXL-PM11Gift boxXL-PM1Blister packPACKINGModel XL-PM11 is an exclusive use for Canada. As for the difference between XL-PM11 and XL-PM1, the packing specification is different. XL-PM11/XM-PM11-21. This design of this product contains special hardware and many circuits and components specially for safety purposes. 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 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 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 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. Replacement 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 not 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 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 (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 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 from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).Alternate check methodPlug 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 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 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 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. 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 voltage.Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 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 of 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 replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer. (Except the J and C version)XL-PM11/XM-PM11-3Important for laser products1.CLASS 1 LASER PRODUCT2.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 theLaser 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 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 of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.!CAUTIONPlease use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.WARNING LABELDHHS LABELCLASS 1LASER PRODUCT(Cabinet -bottom)(Cabinet -door/ inside)Reproduction and position of labelsB, E version J, C versionXL-PM11/XM-PM11-4Preventing static electricity1. Grounding to prevent damage by 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 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 electricity of the work environment.Be careful to use proper grounding in the area where repairs are being performed. 2-1 Ground the workbenchGround 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.2-2 Ground yourselfUse an anti-static wrist strap to release any static electricity built up in your body. 3. Handling the optical pickup1. In order to 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.)2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily destroy the laser diode. 4. Handling 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 nippers, 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 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.Conductive material (conductive sheet) or iron plate(caption)Anti-static wrist strapFlexible boardCD mechanism assemblyshort-circuit landCON1on the main board1.2.3.Remove the door 3.3V?CHECK OSC.of XT701 -3.58MHz?CHECK VOLTAGE PIN NO. 11,12,13,18,56 of MICOM ;5V?CHECKVOLTAGE WAVEFORMPIN NO.25 of MICOMCHECK CONNECTOR-COMPLETE?Ye sYe sYe sYe sYe sYe sYe sYe sYe sYe sYe sYe sYe sYe sYe sYe sYe sYe sYe sNo NoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoNoTOC READ-PLAY?CHECK ALL KEYFUNCTIONCHECKASP(9226)CIRCUITCHECKVOLTAGE PIN No.24of IC9226;DC LEVELCHECKVOLTAGE PIN No.1,2of CON2;DC LEVELCHECKVOLTAGE PIN No.2,3of CON10.5V 3VCHECKVOLTAGE CONNECTORPIN of Q3012V?CHECKVOLTAGE PIN No.4,5of CON2;DC LEVELCHECK DRIVE IC(6508)CIRCUITCHECK DRIVE IC 6508AUDIO SIGNAL?CHECKSIGNAL WAVEFORMPIN No. 1,2 ofEARPHONE JACK;AUDIO SIGNAL?REPALCEEARPHONE JACKREPALCELINE OUT JACKCHECKVOLTAGE PIN No. 58 of MICOM; 0V(LOW)CHECKVOLTAGE COLLECTORPIN of Q803; 0V(LOW)CHECKSIGNAL WAVEFORM PIN No. 1,2 of LINEOUT JACK; AUDIO SIGNALREPLACE MICOMMAXExplanation of MP3An audio compression format that is part of the MPEG-1 specification, which was standardized 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 known 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 Layer 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 each Layer:MP3 (MPEG-1 Audio Layer 3)Layer 3To 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 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) 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 used in Layer 1 and 2.XL-PM11/XM-PM11-91K20K20K1K 20K20K3.75K20K20K1. Block diagramBH6508FS (IC6508) : Motor driverDescription of major ICs1 2 3 4 5 6 7 8 910 11 12 13 14 15 1632 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17- +- +- +- +2. Pin functionPin No.12345678910111213141516SymbolMUTE 4CTIN 1CN 1POWGND 1OUT_IFPOWVCC 1OUT_1RPOWGND12OUT_2RPOWVCC2OUT_2FPOWGND 2CN 2IN 2VREFFunctionMute terminalTriangular wave output terminalCH1 Control signal input terminalCH1 Feedback filter terminalGround for power and analog blockCH1 Non-inverted output terminalVcc for power blockCH1 Inverted output terminalGround for power blockCH2 Inverted output terminalVcc for power blockCH2 Non-inverted output terminalGround for power and digital blockCH2 Feedback filter terminalCH2 Control signal input terminalReference voltage input terminalPin No.17181920212223242526272829303132SymbolVCCVGIN3CN3POWGND3OUT_3FPOWVCC3OUT_3RPOWGND34OUT_4RPOWVCC4OUT_4FCN4IN4POWGND4CLKFunctionControl circuit power supplyPre-drive circuit power supplyCH3 Control signal input terminalCH3 Feedback filter terminalGround for power blockCH3 Non-inverted output terminalVcc for power blockCH3 inverted output terminalGround for power blockCH4 inverted output terminalVcc for power blockCH4 Non-inverted output terminalCH4 Feedback filter terminalCH4 Control signal input terminalGround for power blockExternal clock input terminalNote: Nin-inverted output and inverted output if driver are the polarity to an input terminal.NFAmp.NFAmp.NFAmp.NFAmp.SAWOSCLOGIC 4LOGIC 1LOGIC 3LOGIC 2H BRIDGE 4H BRIDGE 1H BRIDGE 3H BRIDGE 2PREDRIVER 4PREDRIVER 1PREDRIVER 2Thermalshut downPREDRIVER 3MUTE 4F RF R R FVGVREFCTCLKVCCXL-PM11/XM-PM11-10KS9288 (IC9288) : DSP/ ESP2. Pin function (1/2)SymbolVDD_PLLVSSA_PLLVBBA_PLLVCO1LFVCO2LFVSSD_PLLVDDD_PLLPBCKVDDD1XINXOUTVSSD1TEST0EFMILOCKSMEFSMONSMDPSMDSWDCKVDDD2TESTVWFCKLKFSRESETBMLTMDATMCKISTATS0S1SQCKSQDTLCHOUTVDDA_DACVHALFVREFVSSA_DACRCHOUTVDDD_DACVSSD_DACTEST1TEST2TEST3MUTESBCKSBDTC4MVSSD2VDDD3DATXJITBC2PO1202140416080611.Pin layoutPin No.12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152I/O-OO-IO-IIOOOOOO-IOOIIIIOI/OIOO-OO-O-IIIIII/OO-OI/OI/OFunctionAnalog Power for DPLLAnalog Ground for DPLLAnalog Bulk Bias Ground for DPLLPump out for VCO1Pump out for VCO2Digital Ground Separated Bulk Bias for DPLLDigital Power Separated Bulk Bias for DPLLVCO1/2 clock output (4.3218MHz)Digital PowerX'tal oscillator input (16,9344MHz)X'tal oscillator outputDigital PowerTest inputEFM signal inputCLV Servo locking status outputLPF time constant control of the spindle servo error signalON/OFF control signal for spindle servoPhase control output for Spindle Motor driveSpeed control output for Spindle Motor driveWord clock output (X1: 88.2KHz, X2: 176.4KHz)Digital PowerVarious Test inputWrite base clock output The Lock status output of frame syncSystem Reset at 'L'Latch signal input from MicomSerial data input from MicomSerial data receiving clock input from MicomThe internal stats output to MicomSubcode sync signal (S0+S1) outputSubcode-Q data transferring bit clock inputSubcode-Q data serial outputLeft-Channel audio output through DACAnalog Power for DACReference Voltage output for bypassReference Voltage output for bypassAnalog Power for DACRight-Channel audio output through DACDigital Power for DACDigital Ground for DACTest InputTest InputTest InputSystem mute at 'H'Subcode data transferring bit clockSubcode data serial output4.2336MHz clock outputDigital GroundDigital PowerDigital audio