Pioneer-CX3311-tape-cdm 电路图 维修手册.pdf

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

2、Road, #04-01, Singapore 159936 PIONEER CORPORATION2014 2014 Printed in Japan CX-3311 CRT5651 DVD MECHANISM MODULE (LS2.5) CX-3311 K-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

3、manual together with the specific manual for model under repair. ModelService manualDVD Mechanism Module AVH-X5700BHS/XNUC, AVH-X4700BS/XNUCCRT5614CXK8100 AVH-X4700DVD/XNUW5, AVH-X4750DVD/XNRC, AVH-X4750DVD/XNRD,CRT5615CXK8100 AVH-X4750DVD/XNRI, AVH-X4790DVD/XNID AVH-X5700DAB/XNEW5, AVH-X5700BT/XNUW

4、5, AVH-X5750BT/XNRC, CRT5616CXK8100 AVH-X5750BT/XNRD, AVH-X5750TV/XNRD, AVH-X5750BT/XNRI, AVH-X5790BT/XNID AVH-X1700S/XNUC, AVH-X1700DVD/XNUW5, AVH-X1750DVD/XNRC, CRT5617CXK8100 AVH-X1750DVD/XNRD, AVH-X1750DVD/XNRI, AVH-X1790DVD/XNID AVH-X2700BS/XNUC, AVH-X2700BT/XNEW5, AVH-X2700BT/XNUW5, CRT5618CXK

5、8100 AVH-X2750BT/XNRC, AVH-X2750BT/XNRD, AVH-X2750BT/XNRI, AVH-X2790BT/XNID AVH-X3700BHS/XNUC, AVH-X3700DAB/XNEW5CRT5619CXK8100 CONTENTS 1. CIRCUIT DESCRIPTION.2 2. MECHANISM DESCRIPTION.15 3. DISASSEMBLY.21 4. DIAGNOSIS.32 5. EACH SETTING AND ADJUSTMENT.51 RadioFans.CN 收音机爱 好者资料库 2CX-3311 1234 A B

6、C D E F 1234 1. CIRCUIT DESCRIPTION 1.1 ANALOG 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

7、 RF signals / servo / decode, AV decoder (Back 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 signa

8、ls to play DVD-ROM compliant with the DVD format (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-r

9、elated waveforms in the Front End, such as the 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 circuit 2. Signal processing circuit for the

10、 SERVO system / DPD system Gain switching amplifier and Low Pass Filter (LPF) 3. RF signal processing circuit RF addition circuit, Inline circuit, Variable Gain Amplifier (VGA) circuit 4. Laser Power Control (LPC) circuit 5. A/D converter for SERVO (10 bit), DPD system comparator, PWM 1.1.1 APC Circ

11、uit The optical output of a Laser Diode (LD) has large negative 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 inco

12、rporates two types of APC circuits; one is for DVD and the 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

13、by 12 ohm (3.3 ohm 2 + 2.7 ohm 2 = 12 ohm). The result will be 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

14、 module board. Therefore, it is required to adjust power when the CRG mechanism (equipped with the PU unit) or the mechanism module board is replaced. For details, refer to the Power Adjustment Specifications. IC1501 MN2DS0018MA CDL1 DVDL1 CDL0 DVDL0 CN1101 13:78LD 22:IMON 14:65LD 106:LPC02 105:CDMP

15、D 104:LPC01 103:DVDMPD PU Unit RadioFans.CN 收音机爱 好者资料库 3CX-3311 5678 5678 A B C D E F FE = (FE1) - (FE2) After 10 bit ADC 21 20 FE2 FE1 CN1101 115 116 VIN7 VIN8 LPF 50k Hz Input AMP LPF Buffer LPF 50k Hz G=0 dB Buffer AMPADC drive AMP Gain switching 6 dB, 7.5 dB, 9 dB, 10.5 dB ADC Selector Selector

16、ADC Gain switching Gain switching -6 dB, 0 dB, 9.5 dB FE1 FE2 FE signal generating circuit + - 1+Pfbal0,1/0 x0100 1-Pfbal0,1/0 x0100 Offset Cancel Fbal coarse adjustment valueFE AMP 3 dB, 9 dB 1.1.2 SPDL Circuit For the SPDL motor for the DVD mechanism module, a brush motor which is used for the CD

17、mechanism module is adopted instead of a brushless motor which is used for the conventional DVD mechanism module. The SPDL circuit to drive the brush motor is as shown below. IC1501 MN2DS0018MA 66MD26OPIN3- 25OPOUT3 16VO3- 15VO3+ MOTOR IC1251 MN2DS0018MA LSI MN2DS0018MA LSI 1.1.3 FE Generating Circu

18、it Focus Error (FE) Generating Circuit Signals FE1 and FE2 from PU will be AD converted and imported to IC1501. Then, taking the offset cancel into consideration and taking the differential, FE is generated. RadioFans.CN 收音机爱 好者资料库 4CX-3311 1234 A B C D E F 1234 CD(TE based on the three-beam method)

19、 After 10 bit ADC CN1101 F+H_G+H E+G_E+F 10 11 111 112 E+G_E+F F+H_G+H Gain switching -6 dB, 0 dB, 9.5 dB LPF 50k Hz Input AMPLPF G=0 dB Buffer LPF 50k Hz Buffer AMP Gain switching 3 dB, 9 dB Gain switching 6 dB, 7.5 dB, 9 dB, 10.5 dB ADC Selector SelectorADC AMP MN2DS0018MA LSI + - 1+Ptbal0,1/0 x01

20、00 1-Ptbal0,1/0 x0100 Offset Cancel Tbal adjustment value TE AMP MN2DS0018MA LSI A B C D CN1101 16 17 18 19 98 99 VIN2RF VIN4RF -6 dB, 0 dB, 3.5 dB LPF 11.3M /5.7M Hz Input AMP gain switching LPF Buffer gain switching G=0 dB, 3 dB, 6 dB, 9 dB, 12 dB, 15dB VIN1RF VIN3RF LPF 11.3M /5.7M Hz LPF 11.3M /

21、5.7M Hz LPF 11.3M /5.7M Hz 0.1uF 0.1uF 0.1uF 0.1uF HPF HPF 1MHz/2.5MHz/through Phase comparatorLPF (integrator) D + TE signal generating circuit TE AMP MN2DS0018MA LSI DAC CMP Binary comparator DAC CMP CMP CMP DAC DAC DAC control filter DAC control filter DAC control filter DAC control filter Phase

22、comparator HPF 1MHz/2.5MHz/through HPF 1MHz/2.5MHz/through HPF 1MHz/2.5MHz/through 100 97 F+H_G+H E+G_E+F TE signal generating circuit 1.1.4 TE Generating Circuit Tracking Error (TE) Generating Circuit For DVD, using a phase difference method, TE is generated based on a phase difference between (A+C

23、) 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-3311 5678 5678 A B C D E F 1.2 SERVO BLOCK (MN2DS0018MA : IC1501) The servo block performs

24、 servo control for focus, tracking, and traverse, spindle motor control and seek control. 1.2.1 Focus Close For both DVD and CD, the processing sequence after issuing a focus close command will be: 1.2.2 Tracking Close For both DVD and CD, the processing sequence after issuing a tracking close comma

25、nd will be: 1. Tracking brake Measuring 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 t

26、hat the swinging 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-in Process the tracking drive hold with an OF

27、TR signal. 3. Pulling-in check Check 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. AS RFENV Close to Disc Lens Away from Disc Focusing Point FE FODRVVHALF

28、1. Measurement and optimization of a signal level Drive 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 signa

29、l levels for FE and AS (See and in the figure). 2. Focus pulling-in Next, 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 check Check the focusing with t

30、he signal levels of AS and RFENV (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. 12 36 67 6CX-3311 1234 A B C D E F 1234 Tracking-on process 1.2.3 Track Jump The system selects a track jump method acco

31、rding to the target move number of tracks from the following three schemes: Interval Jump, Multi Jump, and Traverse Seek. 1. Interval Jump Detailed 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 condu

32、cts a seek operation to an adjacent track. 2. Multi Jump It 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 Seek By counting the track according to the Track Cross Signal TKC

33、 and measuring the time of TKC, it controls the movement 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

34、tracks CDDVD 1-10 Interval Jump1-10 Interval Jump 11-100 Multi Jump11-500 Multi Jump 101-500 Combination of Multi Jump and Interval Jump501-1000 Combination of Multi Jump and Interval Jump 501-Traverse Seek1001-Traverse Seek Here are the wavefoms of Track Jump. 7CX-3311 5678 5678 A B C D E F Multi J

35、ump (by 32 tracks) for DVD Traverse Seek (by 1001 track) for DVD Traverse Seek (by 10000 track) for DVD COP-COM TD TE COP-COM TD TE TE TD Interval Jump (by 1 track) for DVD Outward Jump TE TD Inward Jump Outward Jump Inward Jump Outward Jump Inward Jump Outward Jump Inward Jump 8CX-3311 1234 A B C D

36、 E F 1234 1.3 AUTOMATIC ADJUSTMENT FUNCTION FD FE A BC D 1.2.4 Focus Jump The function of Focus Jump is for 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

37、 the tracking in the layer currently played. 2. Issue a command to execute jump to the target layer. 3. Close 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

38、the Focus Jump Acceleration End Level. If the acceleration time-out time is reached before detecting the Acceleration 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.

39、3. Decelerate the lens once the Deceleration Start Level is detected until it detects the Deceleration End Level. If 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

40、of Focus Jump Objective Lens B A D C The system automates all kinds of circuit adjustment. The section describes how each automatic adjustment works. 1.3.1 Offset Cancel of VIN7, VIN8, VIN9, and VIN10 Each signal of VIN7 - 9, and 10 from PU will be converted to a digital signal by the AD converter i

41、n the servo block. The Offset Cancel function cancels the input offset of the AD converter when turning the power on. 1.3.2 VCO 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 thr

42、ough learning. To do that, VCO is locked against the reference frequency for learning. Then, it reads a Frequency Control Value (FCNT) and adjusts the VARI register so that the value will be equal to the target FCNT value. 1.3.3 FE Normalization Adjustment The function is to adjust the FE signal lev

43、el so that the level measured during Focus Close will be 190LSB at the digital equalizer input stage. 9CX-3311 5678 5678 A B C D E F 1.4 CIRC 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 directio

44、n 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 and 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

45、 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 track 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 Adju

46、stment The function is to adjust the binarization threshold level to binarize an OFTR signal. 1.3.4 Focus Balance (FBAL) Adjustment The function is 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

47、 Gain Adjustment The function is to adjust to the target gain intersection point by injecting disturbance into a Servo Loop during Tracking Close. 1.3.9 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 convert