Pioneer CX-3150 Service manual

PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, 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 Road, #04-01, Singapore 159936

PIONEER CORPORATION 2005

ORDER NO.

CRT3495

DVD MECHANISM MODULE(MG4)

CX-3150

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 together with the speciﬁc manual for model under repair.

Model Service Manual DVD Mechanism Module

FX-MG9857DVZT/UC FX-MG9857DVZT-91/UC FX-MG9857DVZT/EW FX-MG9857DVZT-91/EW FX-MG9757DVZT/EW FX-MG9757DVZT-91/EW FX-MG9757DVZT/AU FX-MG9757DVZT-91/AU

CRT3494 CXK7402

CONTENTS

1. CIRCUIT DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . 2

2. MECHANISM OVER VIEW . . . . . . . . . . . . . . . . . . . . . . 19

3. DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4. HOW TO ASSEMBLE . . . . . . . . . . . . . . . . . . . . . . . . . . 37

K-ZZU. JULY 2005 Printed in Japan

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1. CIRCUIT DESCRIPTIONS

MN35103UB and MN35104UB are 1-chip LSI for DVD-Player. The connection of this LSI to the Driver IC, SDRAM, Flash-ROM, Audio-DAC, etc. can configure the DVD-Player System. This LSI contains Front End (SODC/FE) that performs RF signal /Servo /Decode processings, Back End (AV decoder/BE) that performs the video decode processing such as MPEG1/MPEG2/JPEG and audio decode processing such as DVD-Audio/AC-3/DTS/MP3, and the system controller (Siscon) for controlling the system. Front End part realizes the arithmetic processing of optical head signal and RF signal processing, the digital signal processing for DVD-ROM reproduction that conforms to DVD standards (16-8 Demodulation, Error correction), the digital signal processing for CD-DA/CD-ROM (Error correction), AV decoder transmission, servo control, spindle motor control and seek control. Please take note that, since (FEP) and (SODC) with DVD mecha-module (MS3) of CX-3016 are integrated into one chip at MN35103UB and MN35104UB, the waveforms of servo system on the front end which had previously appeared at MS3, i.e., the waveforms of FE, TE and AS, cannot be seen anymore.

1.1 Analog Block (MN35103UB, MN35104UB:IC1501)

1 Front End Part (MN35103UB, MN35104UB:IC1501)

The analog block for IC1501 generates the servo signals including focus and tracking, processes addition of RF signals, and controls the laser power of pickup. The servo system contains focus operation amp, focus offset adjustment circuit, 3-beam tracking operation amp, phase difference tracking detection circuit, tracking offset adjustment circuit, TE2 value-making circuit. Also, RF signal processing system contains the functions of AGC and equalizer.

1.1.1 APC Circuit

The optical output for the laser diode (LD) has large minus temperature characteristics. Therefore, the constant

optical output cannot be obtained when LD is driven by the constant current. APC circuit controls the electric current so as to provide constant output at the monitor diode (MD). MN35103UB and MN35104UB contain two types of APC circuits, one for DVD and another for CD. The LD electric current for DVD (CD) can be obtained by dividing the voltage measurements between DVDLD1 (CDLD1) and 5V by 15.6 (3.9 4=15.6 ). For DVD (CD), the results are approx. 26mA (44mA).

+5V

–

LDONCD

LDPOWER

Reg.

LDONDVD

0.17V

–

0.25V0.18V

–

LPCO2

LPC2

+5V

LPCO1

LPC1

0.59V 0.18V

0.5V

0.25V

0.22V

3.9Ω 3.9Ω 3.9Ω 3.9Ω

CDLD1

CDLD0

DVDLD1

DVDLD0

CN1101

78LD

78MD

65LD

65MD

CDLDDVD

PU unit

+5V

CX-31502

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1.1.2 FE Generation Circuit

Focus Error (FE) Generation Circuit

Each of input signals from B1 to B4 which had been quartered by PU within the analog block is input to IC 1501 passing through the resistance and becomes a signal of FE offset adjustment value. Then, the signal is AD-converted within the servo block and adds an offset cancel value to become FE, generating a signal of FE=(FE+)

CN1101

VIN5

VIN6

VIN7

VIN8

–

OFFSET ADJ

–

OFFSET ADJ

(FE-).

Analog block

–

x1 or x4

–

(B1+B3) and FE

1+(Pfbal/0x10000)

Pfepofs

1-(Pfbal/0x10000)

Pfenofs

Servo block

-=-

(B2+B4) after adding a focus

–

Dfesv

1.1.3 TE Generation Circuit

Trackings Error (TE) Generation Circuit

For DVD, TE is generated, with the application of a phase contrast method, from the phase difference of (B2+B4) and (B1+B3). For CD, TE is generated, with the application of a 3-beam method, by sending the signal to the variable amp set for the tracking offset adjustment via outer-attached resistance and then by AD-converting it to

–

VHALF

–

Analog block

6dB 15dB(3dB STEP)

0dB/12dB

–

OFFSET DAC

6dB 15dB(3dB STEP)

0dB/12dB

–

OFFSET DAC

Analog block

OFFSET ADJ

30kHz

–

x1 or x4

–

1+(Pfbal/0x10000)

Servo block

Pfepofs

1-(Pfbal/0x10000)

Pfenofs

1+(Pfbal/0x10000)

Pfepofs

1-(Pfbal/0x10000)

Pfenofs

–

Dfesv

Servo block

–

Dfesv

make the formula of TE=A

DVD (TE from phase difference)

CN1101

VIN1

VIN2

VIN3

VIN4

CD (3-beam TE)

CN1101

VIN9

20kΩ

VREFH

VIN10

VREFH

20kΩ

CX-3150

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1.2 Servo Block (MN35103UB, MN35104UB:IC1501)

Servo block performs focus, tracking, servo control for traverse, spindle motor control and seek control.

1.2.1 Focus Close

FODRV

Far from disc

Lens

Close to disc

RFENV

VHALF

Focal point

After issuing the focus close command, the following processes are taken for both DVD and CD.

1. Measure and optimize signal levels First drive PU lens far from the disc and then drive closer to the disc. At the focal point met in the process of this move, measure signal levels of FE, AS and RFENV respectively, and optimize their levels for FE and AS (1 & 2 in the above figure).

2. Focus closing

Next, drive the lens far from the disc again to detect the closing levels of FE and AS. Then activate focus loop filter for closing focus (3 6).

3. Check closing Check the closing with signal levels of AS and RFENV (6 & 7).

Focus search in test mode can check the signal levels and focus drive voltages for FE, AS and RFEV.

1.2.2 Tracking Close

After issuing the tracking close command, the following processes are taken for both DVD and CD.

1. Tracking brake Measure one half cycle of the tracking cross and if the cycle is within the range of designation, output the brake

pals. Output direction of brake pals is determined by the phase relations of OFTR and TKC (TE's binarization) signals. After confirming that the swing of lens against disc is controlled, the brake stops and the closing begins. If the closing condition is not met within 10msec. after outputting brake, the brake stops and the closing begins.

2. Tracking closing Process the tracking drive hold with OFTR signal.

3. Check closing Check whether or not the track jump does not exceed the designated number within the designated term. Closing check will be time-out at 20msec. Retry using a command from the microcomputer.

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CX-31504

1.2.3 Track Jump

The system selects from three types of methods; i.e. interval jump, multi jump and traverse seek, according to the target number of moving tracks.

1. Interval Jump The detailed seek is capable due to the execution of repetitive one-track jumps. It is used when approaching to the target track or seek-operating to an adjacent track.

2. Multi Jump It counts both edges of the track cross signal TKC and moves for designated number of track counts.

3. Traverse Seek It controls the movement speed by measuring the time of the track cross signal TKC and manages the vibration of pickup generated upon movement to the minimum.

Types of target number of moving jumps illustrating the jump switch setting for both DVD and CD.

DVD 1-10 Interval Jump 11-100 Multi Jump 101-500 Combination of Multi Jump and Interval Jump Over 501 Traverse Seek The waveforms of track jumps are shown in the next page.

CD 1-10 Interval Jump 11-32 Multi Jump 33-500 Combination of Multi Jump and Interval Jump Over 501 Traverse Seek

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CX-3150

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Interval Jump (1 Track)

Outer Jump Inner Jump

Multi Jump (32 Track)

Outer Jump Inner Jump

Traverse Seek (501 Track)

Outer Jump Inner Jump

Traverse Seek (5000 Track)

Outer Jump Inner Jump

CX-31506

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(1 Layer)

(0 Layer)

object lens

L0 L1

L1 L0

A D

B C

1.2.4 Focus Jump

Focus jump is a function corresponding to the single-sided or both-sided two-layers. Seen from the object lens, a forward layer is called 0 Layer (L0) and a farther one is called 1 Layer (L1).

The flow of focus jump is shown below.

1. Open tracking at the layer during play.

2. Issue a command to execute jump to the target layer.

3. At the jumped layer, replay by closing the tracking.

Also, the processes when issuing a jump command are as follows.

1. Accelerate the lens to the target layer until FE signal detects the acceleration completion level for focus jump. However, if the time of acceleration time-out reaches before detecting the acceleration completion level, the acceleration will compulsively stop.

2. Move lens with inertia instead of outputting the drive voltage until FE signal detects the deceleration initiation level.

3. Decelerate lens for the duration from detection of the deceleration initiation level to the deceleration completion level. However, if the time of deceleration time-out reaches before detecting the deceleration completion level, the deceleration will compulsively stop.

The waveforms of focus jump are shown below.

The waveforms of focus jump

L0 L1

L1 L0

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1.3 Automatic Adjustment Function

This system totally automates the circuit adjustments.

The details of automatic adjustments are explained respectively as follows:

1.3.1 FE, TE, AS and Offset Cancel

Each of analog signals for FE, TE and AS generated at FEP is converted into a digital signal by A/D converter inside servo block. Offset cancel is a function to cancel the input offset of A/D converter when the power is on.

1.3.2 VCO Gain Adjustment (VARI Adjustment)

It has a function to absorb dispersion of VCO gains among LSI solid by learning and to automatically adjust VCO gains for the constant allocation. Lock VCO to 186- multiplied frequency against the input clock of crystal criteria, read Frequency Control Value (FCNT), and then adjust VARI register so that the value becomes equivalent to the target FCNT value.

1.3.3 FE Normalization Adjustment

After A/D-converting FE signal level at servo block which was measured at focus close, adjust it to 190LSB at the digital equalizer input stage.

1.3.4 Spindle Gain Learning

Measure the duration from the halting state of spindle motor to the point reaching the fixed rotation speed for Gain adjustment. Then adjust in the way of absorbing torque dispersion on spindle motor.

1.3.5 Tracking Balance (TBAL) Adjustment

By applying Newton-Raphson method, search for a balanced point at which DC offset becomes 0 by vibrating

lens toward track direction at the time of the focus close and the tracking open.

1.3.6 Tracking Error Amplitude Learning

After vibrating lens toward track direction at the time of the focus close and the tracking open to A/D-convert the amplitude level to ADSC, adjust it to 190LSB at the digital equalizer input stage.

1.3.7 Focus Balance (FBAL) Adjustment

Adjust the focus position so that RFENV becomes maximum at the tracking close.

1.3.8 Focus Gain Adjustment and Tracking Gain Adjustment

Insert disturbance to servo loop at the tracking close and adjust to a target gain intersection.

1.3.9 AS Normalization Adjustment

After measuring AS signal levels for the designated number of samplings at the tracking close to A/D-convert by ADSC, the precise adjustment is made to set 64LSB at the digital equalizer input stage.

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All automatic adjustments can be confirmed by indicating their results at test mode.

List of Automatic Adjustment Coefficients

States

Power On

F Close

F Close (after TBAL)

T Close

Coefficients FE Offset TE Offset AS Offset Spindle Gain FE MAX FE MIN AS MAX FE Normalization TE MAX TE MIN TE Normalization F Gain T Gain AS Normalization

FBF0 0410 E8BA 1746 F96D 0693 0121 02E3 1D8B 547E BADE E7D3 10CB 3753 0125 02FE 1A7C 5ABC A544 E584 010C 0396 0100 0400 0100 0400 0128 03D0

DVD

FB5C 04A4 F740 08C0 F6B7 0949 0113 0447 1D5A 5663 A99D E2A6 12E2 45E4 0119 033D 0DB5 33D6 CC2A F24B 01D5 06F0

00EA 0364

Note: Coefficients are indicated in hexadecimal numbers.

All figures describe specifications at the production line. Disc applies DVD

REF-A1 for DVD and TCD-782 for CD.

1.4 CIRC Block (MN35103UB, MN35104UB:IC1501)

CIRC block contains digital signal processing function for CD-DA and CD-ROM (EFM demodulation and error correction), digital servo processing for spindle motor and 1-bit DA converter with digital filter (Differential OP amp output with secondary lowpass filter).

1.5 DRC Block (MN35103UB, MN35104UB:IC1501)

Digital Read Channel (DRC) provides A/D converter, adaptive equalization, bit-a-bit detector, digital PLL circuit, CPU interface and peripheral circuits for reading signals of optical disks.

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2 Back End Part

2.1 States of Power Supply

VD8V

VD5PU

BVC33

SRVDD33

VD5

F.E. Driver System DISC Detection LED

IC1001 AVCC, for 5V REG IC

IC1002 VCC, for 5V REG IC

IC2001 Changer CPU Power Supply

IC1651 SRAM Power Supply

IC1901 VCC33, for 3.3V REG IC

AVCC5(= 5.0V)

VCC5(= 5.0V)

VCC33(= 3.3V)

IC1851 DAC Q1551 Peripherals

F.E. System IC 1201 P.U Peripherals

IC 1501 AV CHIP etc.

VD5

2.2 States of Clock

Using 27MHz primary crystal (X1801), 27MHz buffer-out (VCLK & BECLK) audio clock (EXTCK & DACCLK [with 24M/33M/36M switches]) and F.E. part clock (MCK33) are produced with IC1801.

27MHz Crystal

IC1003

1.5V output DCDC converter

IC1801

Clock Generator

VCC15(= 1.5V)

States of Power Supply

BECLK

SO1 [24M]

AO1 [33M/36M]

EXTCK

MCK33

IC 1501 AV CHIP

IC1501 AVLSI 170Pin

IC 1802 selector

IC1501 AVLSI 172Pin

IC1501 92Pin F.E. Part Clock

DACCLK

IC1851 AUDIO DAC

VCC33

States of Clock

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CX-315010

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2.3 Audio Circuit

The serial three lines of audio output from AVLSI is input to IC 1851 (Audio DAC) and the signal that had become analog audio is output from HOST I/F. For mute circuit, only AMUTE can be output at present, and Mute Tr is located at the product side.

Asfor6choutput,twokinds,2chrippingoutputtype,and6ch/2chrippingoutputcombinationtype,existbythe model.Itisdecidedbyproducttypeandspecification.

IEC958(Audiodigitaloutput)haswhatisequippedbythemodel,andthethingwhichisnotequipped.

CN1901 HOST I/F

SRCK IC1503 AVLSI

ADOUT0

LRCK

IC1851 Audio DAC

6ch-Multi channels are now unused.

IC1881 Buffer SW Ripping or 6ch digtal out

Audio Circuit

2.4 Video Circuit

Composite Video Signal is output from DAC circuit part in AVLSI. Output from HOST I/F via Buffer circuit.

IC1501

AVLSI

Video DAC circuit part

COMP

AVCC5

Q1551 peripheral Video buffer circuit

MCKENA

RO MCKENA

GNDAU

COMPO

CN1881

CN1551

CN1901 HOST I/F

Video circuit

CX-3150

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2.5 SDRAM I/F

Communication I/F between AVLSI and memory to allocate MPEG stream data as a buffer. Capacity of SDRAM is 128Mbit. Note that XCSM, XWE, XCAS, XRAS, XCSM for IC1570 are renamed respectively to NCSM, NWE, NCAS, NRAS, NCSM for IC1501.

MA0 11 MDQ0 31 MCK XWE (NWE) XCAS (NCAS)

IC1570 SDRAM

XRAS (NRAS) XCSM (NCSM)

IC1501 AVLSI

DQM0 DQM1 DQM2 DQM3

SDRAM I/F

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CX-315012

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3 MECHANISM CONTROL

- Overview

The combination of load/eject operation, camgear motor (operation mode) operation, elevation operation and clamp operation enables the operation as changer mechanism module.

3.1 Loading system

Disc position is detected with 3 switches attached to mechanism unit, photo, and LED, and load/eject is performed by driving an E/L motor. *E/L is abbreviation of Elevation/Loading. (MG4 mechanism shares a motor like G3 mechanism, unlike G2 or MG3 mechanism.)

3.1.1 Detect system

The 3 switches, photo and LED operate load start/load end, disc form detection and watching disc eject.

3.1.2 Drive system

Controlling an E/L motor by the control unit enables the following function:

Loading of disc Ejecting of disc

a) Drive system

It controls drive direction by output E/LFWD, E/LREV from the microcomputer (IC2001), and 3 values of drive voltage by Hi-Z/H/L of E/LVOL2.

LOADPHT

LOADSWR

LOADSWL

IN/SW

IC2001 98

E/LVOL1

(no use)

MECHANISM

CONTROLLER

730

At the time of loading E/L+<E/L- ; (E/LFWD; L, E/LREV; H) At the time of ejecting E/L+>E/L- ; (E/LFWD; H, E/LREV; L)

Drive voltage (E/LVOL2=Hi-Z) ; 7.9V Drive voltage (E/LVOL2=H) ; 7V Drive voltage (E/LVOL2=L) ; 4.8V

E/LFWD

E/LREV

E/LVOL2

VD5PU

IC1240

3+3ch

DRIVER

E/L+

E/L

MOTOR

E/L-

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b) Drive sequence

At the time of loading:

1 One of LOADPHT, LOADSWR, LOADSWL starts driving with H. 2 All of LOADPHT, LOADSWR, LOADSWL detect H at the same time. 3 Detecting H of INISW. 4 Detecting L of LOADSWR. 5 Detecting L of LOADSWL and stopping E/L motor.

LOADPHT

LOADSWR

LOADSWL

At the time of ejecting:

1 Starting driving H of LOADSWR. 2 Detecting L of INISW. 3 Detecting L of LOADSWL and after reverse brake (16ms), stopping E/L monitor.

INISW

LOADPHT

LOADSWR

LOADSWL

INISW

3.2 Elevation system

3.2.1 Detect system

It uses a linear position sensor (VR1), converts stage chassis level to voltage value and captures it by a microcomputer A/D to detect absolute position.

Detect circuit

Linear position sensor

VR1

ELVSNS

SWDVDD

VR11

ELVREF

GND

3.2.2 Drive system

Controlling an E/L motor by the control unit enables the following function. Elevation function

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CX-315014

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a) Drive circuit

t controls drive direction by output E/LFWD, E/LREV from the microcomputer (IC2001), and 3 values of drive voltage by Hi-Z/H/L of E/LVOL2.

Driving upper direction E/L+>E/L- , (E/LFWD; H, E/LREV; L) Driving lower direction E/L+<E/L- , (E/LFWD; L, E/LREV; H)

Drive voltage ( E/LVOL2=Hi-Z) ; 7.9V

( E/LVOL2=H) ; 7V ( E/LVOL2=L) ; 4.8V

LOADPHT

LOADSWR

LOADSWL

IN/SW

IC2001 98

MECHANISM

CONTROLLER

730

E/LVOL1 E/LVOL2

(no use)

E/LFWD

E/LREV

VD5PU

IC1240

3+3ch

DRIVER

E/L+

E/L

MOTOR

E/L-

b) Drive sequence

1 Driving continuously to the position of brake start. 2 Detecting of passing the position of brake start and starting short brake. 3 Starting of driving pulse to reach OK range. After confirmation of entering OK range, it is completed.

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3.3 Camgear motor system

3.3.1 Detect system

It uses a rotary position sensor (VR2), converts a camgear rotation angle to voltage value and captures it by a microcomputer A/D to detect absolute position.

Detect circuit

SWDVDD

VR21

CAMREF

Rotary position sensor

VR2

GND

CAMSNS

3.3.2 Drive system

Controlling a cam gear motor by the control unit enables the following function:

Open/close of shutter Open /close of tray tab Division of tray Rotation operation of CRG chassis (moving to the play position) Release of mechanism lock Drive of eject arm

CX-315016

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a) Drive circuit

It controls drive direction by output CAMFWD and CAMREV from the microcomputer (IC2001), and two values of drive voltage by Hi-Z/H of CAMVOL.

Driving CRG chassis to the outer direction (direction of EJECT position)

AM+>CAM-; (CAMFWD; H, CAMREV; L) Driving CRG chassis to the inner direction (direction of PLAY position)

CAM+<CAM-; (CAMFWD; L, CAMREV; H) Drive voltage CAMVOL=Hi-Z; 8V

CAMVOL=H; 7V

VR2

VR21

CAMSNS

CAMREF

IC2001 94

MECHANISM

CONTROLLER

CAMFWD

CAMREV

IC1240

3+3ch

DRIVER

CAM+

CAM-

CAMVOL

VD5PU

b) Drive sequence

1 Driving continuously to the position of brake start. 2 Detecting of passing the position of brake start and starting short brake or reverse brake. 3 Starting of driving pulse to reach OK range. After confirmation of entering OK range, it is completed.

CAMGEAR

MOTOR

CX-3150

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