Pioneer-CX3311-dvdm-sm 维修电路原理图.pdf

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1、ORDER NO.PIONEER CORPORATION 1-1, Shin-ogura, Saiwai-ku, Kawasaki-shi, Kanagawa 212-0031, JapanPIONEER ELECTRONICS (USA) INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.PIONEER EUROPE NV Haven 1087, Keetberglaan 1, 9120 Melsele, BelgiumPIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road

2、, #04-01, Singapore 159936 PIONEER CORPORATION20142014 Printed in JapanCX-3311CRT5651DVD MECHANISM MODULE (LS2.5)CX-3311K-FZZ DEC.- This service manual describes the operation of the DVD mechanism module incorporated in models listed in the table below.- When performing repairs use this manual toget

3、her with the specific manual for model under repair.ModelService manualDVD Mechanism ModuleAVH-X5700BHS/XNUC, AVH-X4700BS/XNUCCRT5614CXK8100AVH-X4700DVD/XNUW5, AVH-X4750DVD/XNRC, AVH-X4750DVD/XNRD,CRT5615CXK8100AVH-X4750DVD/XNRI, AVH-X4790DVD/XNIDAVH-X5700DAB/XNEW5, AVH-X5700BT/XNUW5, AVH-X5750BT/XN

4、RC, CRT5616CXK8100AVH-X5750BT/XNRD, AVH-X5750TV/XNRD, AVH-X5750BT/XNRI, AVH-X5790BT/XNIDAVH-X1700S/XNUC, AVH-X1700DVD/XNUW5, AVH-X1750DVD/XNRC, CRT5617CXK8100AVH-X1750DVD/XNRD, AVH-X1750DVD/XNRI, AVH-X1790DVD/XNIDAVH-X2700BS/XNUC, AVH-X2700BT/XNEW5, AVH-X2700BT/XNUW5, CRT5618CXK8100AVH-X2750BT/XNRC,

5、 AVH-X2750BT/XNRD, AVH-X2750BT/XNRI, AVH-X2790BT/XNIDAVH-X3700BHS/XNUC, AVH-X3700DAB/XNEW5CRT5619CXK8100CONTENTS1. CIRCUIT DESCRIPTION.22. MECHANISM DESCRIPTION.153. DISASSEMBLY.214. DIAGNOSIS.325. EACH SETTING AND ADJUSTMENT.51RadioFans.CN 收音机爱 好者资料库2CX-33111234ABCDEF12341. CIRCUIT DESCRIPTION1.1 A

6、NALOG BLOCK (MN2DS0018MA : IC1501)MN2DS0018MA is a one-chip LSI for a DVD Player. By connecting the LSI with a driver IC, SDRAM, Flash-ROM, Audio-DAC and so on, a DVD Player system can be established.The LSI incorporates the Front End (SODC / FE) to process RF signals / servo / decode, AV decoder (B

7、ack End / BE) to process video decode such as MPEG1 / MPEG2 / JPEG and audio decode such as Dolby Digital2 / MP3, and a system controller to control the system.The Front End part processes the optical head signal computing and RF signals, the digital signals to play DVD-ROM compliant with the DVD fo

8、rmat (16 - 8 demodulation, error correction), and the digital signals (error correction) for CD-DA / CD-ROM, as well as conducts AV decoder forwarding, servo control, spindle motor control and seek control.Please note that in this MN2DS0018MA, the servo-related waveforms in the Front End, such as th

9、e waveforms in the FE, TE, and AS, cannot be observed, as in the case of a DVD mechanism module (LS1) CX-3250.FRONT END SECTION (MN2DS0018MA : IC1501)The functions of the analog block are:1. Reference supply circuit2. Signal processing circuit for the SERVO system / DPD systemGain switching amplifie

10、r and Low Pass Filter (LPF)3. RF signal processing circuitRF addition circuit, Inline circuit, Variable Gain Amplifier (VGA) circuit4. Laser Power Control (LPC) circuit5. A/D converter for SERVO (10 bit), DPD system comparator, PWM1.1.1 APC CircuitThe optical output of a Laser Diode (LD) has large n

11、egative temperature characteristics.Therefore, driving LD with constant current will not get you constant optical output.The APC circuit controls the current so that the output will be constant using a Monitor Diode (MD).The MN2DS0018MA incorporates two types of APC circuits; one is for DVD and the

12、other is for CD.The LD current for a CD is calculated by dividing the measured voltage between CDL1 and 5V by 15 ohm (3.9 ohm 3 + 3.3 ohm = 15 ohm).For a DVD, the current is calculated by dividing the measured voltage between DVDL1 and 5V by 12 ohm (3.3 ohm 2 +2.7 ohm 2 = 12 ohm). The result will be

13、 about 50 mA (45 mA) for DVD (CD).On this or later version of the DVD mechanism module, the Power adjustment circuit (which is the circuit from IMON to CDMP and DVDMP) that adjusts the optical output of the LD is mounted on the mechanism module board. Therefore, it is required to adjust power when t

14、he CRG mechanism (equipped with the PU unit) or the mechanism module board is replaced.For details, refer to the Power Adjustment Specifications.IC1501MN2DS0018MACDL1DVDL1CDL0DVDL0CN110113:78LD22:IMON14:65LD106:LPC02105:CDMPD104:LPC01103:DVDMPDPU UnitRadioFans.CN 收音机爱 好者资料库3CX-331156785678ABCDEFFE =

15、 (FE1) - (FE2)After 10 bit ADC2120FE2FE1CN1101115116VIN7VIN8LPF50k HzInput AMPLPFBufferLPF50k HzG=0 dBBuffer AMPADC drive AMPGain switching6 dB, 7.5 dB, 9 dB, 10.5 dBADCSelectorSelectorADCGain switchingGain switching-6 dB, 0 dB, 9.5 dBFE1FE2FE signal generating circuit+-1+Pfbal0,1/0 x01001-Pfbal0,1/

16、0 x0100Offset CancelFbal coarse adjustment valueFEAMP3 dB, 9 dB1.1.2 SPDL CircuitFor the SPDL motor for the DVD mechanism module, a brush motor which is used for the CD mechanism module is adopted instead of a brushless motor which is used for the conventional DVD mechanism module.The SPDL circuit t

17、o drive the brush motor is as shown below.IC1501MN2DS0018MA66MD26OPIN3-25OPOUT316VO3-15VO3+MOTORIC1251MN2DS0018MA LSIMN2DS0018MA LSI1.1.3 FE Generating CircuitFocus Error (FE) Generating CircuitSignals FE1 and FE2 from PU will be AD converted and imported to IC1501. Then, taking the offset cancel in

18、to consideration and taking the differential, FE is generated.4CX-33111234ABCDEF1234CD(TE based on the three-beam method)After 10 bit ADCCN1101F+H_G+HE+G_E+F1011111112E+G_E+FF+H_G+HGain switching-6 dB, 0 dB, 9.5 dBLPF50k HzInput AMPLPFG=0 dBBufferLPF50k HzBuffer AMPGain switching3 dB, 9 dBGain switc

19、hing6 dB, 7.5 dB, 9 dB, 10.5 dBADCSelectorSelectorADCAMPMN2DS0018MA LSI+-1+Ptbal0,1/0 x01001-Ptbal0,1/0 x0100Offset CancelTbal adjustment valueTEAMPMN2DS0018MA LSIABCDCN1101161718199899VIN2RFVIN4RF-6 dB, 0 dB, 3.5 dBLPF11.3M/5.7M HzInput AMP gain switchingLPFBuffer gain switchingG=0 dB, 3 dB, 6 dB,

20、9 dB, 12 dB, 15dBVIN1RFVIN3RFLPF11.3M/5.7M HzLPF11.3M/5.7M HzLPF11.3M/5.7M Hz0.1uF0.1uF0.1uF0.1uFHPFHPF1MHz/2.5MHz/throughPhase comparatorLPF (integrator)D+TE signal generating circuitTEAMPMN2DS0018MA LSIDACCMPBinary comparatorDACCMPCMPCMPDACDACDAC control filterDAC control filterDAC control filterD

21、AC control filterPhase comparatorHPF1MHz/2.5MHz/throughHPF1MHz/2.5MHz/throughHPF1MHz/2.5MHz/through10097F+H_G+HE+G_E+FTE signal generating circuit1.1.4 TE Generating CircuitTracking Error (TE) Generating CircuitFor DVD, using a phase difference method, TE is generated based on a phase difference bet

22、ween (A+C) and (B+D). For CD, using a three-beam method, TE is generated based on the equation TE = (F+H_G+H) - (E+G_E+F) after going into the variable amplifier and AD converted.DVD (TE based on phase difference)5CX-331156785678ABCDEF1.2 SERVO BLOCK (MN2DS0018MA : IC1501)The servo block performs se

23、rvo control for focus, tracking, and traverse, spindle motor control and seek control.1.2.1 Focus CloseFor both DVD and CD, the processing sequence after issuing a focus close command will be:1.2.2 Tracking CloseFor both DVD and CD, the processing sequence after issuing a tracking close command will

24、 be:1. Tracking brakeMeasuring a 1/2 cycle of track cross, output a brake pulse if the cycle is within the specified range. In which direction the brake pulse should be output is determined from the phase relation between OFTR and TKC signals (binarized signal of TE). Once it is confirmed that the s

25、winging of the lens against the disc has been successfully controlled, stop braking and start pulling in. If the pulling-in conditions are not fulfilled within 10 msec after brake is output, stop braking and start pulling in.2. Tracking pulling-inProcess the tracking drive hold with an OFTR signal.3

26、. Pulling-in checkCheck that track jump is less than the specified number within the specified period. The pulling-in check will time out in 8.4 msec and be retried upon receiving a command from the microprocessor.ASRFENVClose to DiscLensAway from DiscFocusing PointFEFODRVVHALF1. Measurement and opt

27、imization of a signal levelDrive the PU lens in the direction to get away from the disc first, and then drive it in the direction to get closer to the disc.During the process, measure the signal levels of FE, AS, and RFENV when it passes the focusing point. Optimize the signal levels for FE and AS (

28、See and in the figure).2. Focus pulling-inNext, drive the lens in the direction to get away from the disc and detect pulling-in level of FE and AS. Then, activate the Focus Loop Filter to pull in the focus (See - in the figure).3. Pulling-in checkCheck the focusing with the signal levels of AS and R

29、FENV (See and in the figure).Using a focus search of test mode, you can check the signal levels of FE, AS, and RFENV as well as focus driving voltage.1236676CX-33111234ABCDEF1234Tracking-on process1.2.3 Track JumpThe system selects a track jump method according to the target move number of tracks fr

30、om the following three schemes: Interval Jump, Multi Jump, and Traverse Seek.1. Interval JumpDetailed seek is possible because this scheme repeatedly performs track jump by 1 track. This scheme is selected when it is close to the target track or it conducts a seek operation to an adjacent track.2. M

31、ulti JumpIt counts the both edges of a Track Cross Signal TKC and moves by the specified number of track count.It also drives the CRG motor according to the number of jump.3. Traverse SeekBy counting the track according to the Track Cross Signal TKC and measuring the time of TKC, it controls the mov

32、ement speed and performs the seek operation. At the same time, it minimizes the vibration in the pick-up that will occur during movement. Here is the common jump switching setting between DVD and CD.Types of jump according to target move number of tracksCDDVD1-10 Interval Jump1-10 Interval Jump11-10

33、0 Multi Jump11-500 Multi Jump101-500 Combination of Multi Jump and Interval Jump501-1000 Combination of Multi Jump and Interval Jump501-Traverse Seek1001-Traverse SeekHere are the wavefoms of Track Jump.7CX-331156785678ABCDEFMulti Jump (by 32 tracks) for DVDTraverse Seek (by 1001 track) for DVDTrave

34、rse Seek (by 10000 track) for DVDCOP-COMTDTECOP-COMTDTETETDInterval Jump (by 1 track) for DVDOutward JumpTETDInward JumpOutward JumpInward JumpOutward JumpInward JumpOutward JumpInward Jump8CX-33111234ABCDEF12341.3 AUTOMATIC ADJUSTMENT FUNCTIONFDFEABCD1.2.4 Focus JumpThe function of Focus Jump is fo

35、r single-sided or double-sided dual layers. The nearer layer from the Objective Lens is called Layer 0 (L0) and the farther layer called Layer 1 (L1).Focus Jump is conducted as follows:1. Open the tracking in the layer currently played.2. Issue a command to execute jump to the target layer.3. Close

36、the tracking in the layer after the jump and restart the play.When a jump command is issued, the processing will be:1. Accelerate the lens toward a target layer until an FE signal detects the Focus Jump Acceleration End Level.If the acceleration time-out time is reached before detecting the Accelera

37、tion End Level, however, it will forcibly end the acceleration.2. Move the lens through inertia until an FE signal detects the Deceleration Start Level without outputting drive voltage.3. Decelerate the lens once the Deceleration Start Level is detected until it detects the Deceleration End Level.If

38、 the deceleration time-out time is reached before detecting the Deceleration End Level, however, it will forcibly end the deceleration.Here are the waveforms of Focus Jump.Waveforms of Focus JumpObjective LensBADC The system automates all kinds of circuit adjustment. The section describes how each a

39、utomatic adjustment works.1.3.1 Offset Cancel of VIN7, VIN8, VIN9, and VIN10Each signal of VIN7 - 9, and 10 from PU will be converted to a digital signal by the AD converter in the servo block.The Offset Cancel function cancels the input offset of the AD converter when turning the power on.1.3.2 VCO

40、 Gain Adjustment (VARI Adjustment)The system has the function to automatically adjust VCO gain so that it will be constant by absorbing the variations from part to part through learning.To do that, VCO is locked against the reference frequency for learning.Then, it reads a Frequency Control Value (F

41、CNT) and adjusts the VARI register so that the value will be equal to the target FCNT value.1.3.3 FE Normalization AdjustmentThe function is to adjust the FE signal level so that the level measured during Focus Close will be 190LSB at the digital equalizer input stage.9CX-331156785678ABCDEF1.4 CIRC

42、BLOCK (MN2DS0018MA : IC1501)1.5 DRC BLOCK (MN2DS0018MA : IC1501)1.3.7 Tracking Balance (TBAL) Adjustment The function is to vibrate the lens in the direction of track, and using the Newton-Raphson method, search for the balancing point where DC offset will be zero and adjust it during Focus Close an

43、d Tracking Open.1.3.5 DPD Amplitude Adjustment The function is to adjust the gain at the analog stage so that the input signal of the DPD comparator of the TE generating circuit of DVD will be constant.1.3.6 Tracking Error Amplitude Learning The function is to vibrate the lens in the direction of tr

44、ack and adjust the TE amplitude level so that it will be 190LSB at the digital equalizer input stage during Focus Close and Tracking Open.1.3.8 OFTR Adjustment The function is to adjust the binarization threshold level to binarize an OFTR signal.1.3.4 Focus Balance (FBAL) Adjustment The function is

45、to adjust a focus position so that RFENV will be maximized during Focus Close, Tracking Open and Tracking Close.1.3.10 Focus Gain Adjustment / Tracking Gain Adjustment The function is to adjust to the target gain intersection point by injecting disturbance into a Servo Loop during Tracking Close.1.3

46、.9 AS Normalization Adjustment The function is to fine-tune the AS signal level so that it will be 64 LSB at the digital equalizer input stage after measuring the AS signal level by the specified number of sampling and A/D converting it at ADSC during Tracking Close. All the automatic adjustment res

47、ults can be checked on the display in a test mode. List of Automatic Adjustment CoefficientsCaution: All coefficients are expressed in hexadecimal. The specification values for all production lines (during TP production) are used.As for a disc used, it is TDV-582 for DVD and TCD-792 for CD.VIN9 Offs

48、etState06B1 _ 08D3VIN10 OffsetFocus closeFEPP(FEMAX-FEMIN)1D84 _ 6C08AS MAXFE Normalization AdjustmentFocus close(after TBAL)TEPP(TEMAX-TEMIN)36B0 _ 80E8Not specifiedTE Normalization AdjustmentTracking closeFocus GainTracking GainAS Normalization AdjustmentPower OnVIN8 OffsetVIN7 Offset-DVDCDCoeffic

49、ient05FB _ 0A1705FB _ 0A17-06B1 _ 08D32E18 _ A8CFNot specifiedNot specified1235 _ 5B070100 _ 04000100 _ 0400Not specified The CIRC block incorporates the digital signal processing function for CD-DA and CD-ROM (EFM demodulation and error correction) and the digital servo processing function for a Sp

50、indle Motor. The Digital Read Channel (DRC) is equipped with A/D converter, Digital Equalizer (DEQ), Adaptive equalizer, Viterbi detector, Digital PLL circuit, RISC interface, and peripheral circuits to read signals of an optical disc.10CX-33111234ABCDEF12341.6 POWER SUPPLY MAPVD8(Driver)8 V 0.4 VVD