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CX-3311

4. DIAGNOSIS

4.1 DIAGNOSIS FLOWCHART FOR DVD CORE UNIT

LS2.5 BACK END SECTION FLOW

Is the image

in error?

Go to FE related
repair process.

Is VD8,

VCC5 power

supply voltage OK?

Execute

check 7.

Standby

OK?

Execute

check 1.

Is VDD5

(VCC33, VCC12)

power supply

voltage OK?

Execute check 2.

Can the

playback

start?

Is SDRAM

IF OK?

Execute

check 6.

Is the video

circuit OK?

Execute

check 11.

Repair the
defective part.
*1) Note

Normal?

Is AVCC5

voltage OK?

Execute

check 8.

Reset OK?

Execute

check 3.

Is VSENS

OK?

Execute

check 4.

Go to FE
section check.

Replace the unit.

Normal?

Go to FE
section check.

Is 27 MHz

OK?

Execute

check 5.

Is FE section

normal?

Replace the unit.

FE section check.

Does the

operation

take time?

Is the

life of flash

memory OK?

Execute

check 12.

Is the sound

in error?

Is AVCC5

voltage OK?

Execute

check 8.

Is DACCLK OK?

Execute

check 9.

Is the audio

circuit OK?

Execute

check 10.

*1)

Do not handle by IC replacement even when Flash
ROM replacement is basically necessary by service,
but please handle by core unit replacement (as keys
and so forth are not written in single Flash units).

Is the mechanism

module number

CXK8102?

YES

START

END

YES

Summary of Contents for CX-3311

Page 1: ... manual for model under repair Model Service manual DVD Mechanism Module AVH X5700BHS XNUC AVH X4700BS XNUC CRT5614 CXK8100 AVH X4700DVD XNUW5 AVH X4750DVD XNRC AVH X4750DVD XNRD CRT5615 CXK8100 AVH X4750DVD XNRI AVH X4790DVD XNID AVH X5700DAB XNEW5 AVH X5700BT XNUW5 AVH X5750BT XNRC CRT5616 CXK8100 AVH X5750BT XNRD AVH X5750TV XNRD AVH X5750BT XNRI AVH X5790BT XNID AVH X1700S XNUC AVH X1700DVD XN...

Page 2: ...ow 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 Circuit 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 outpu...

Page 3: ...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 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 66 MD 26 OPIN3 25 OPOUT3 16 VO3 15 VO3 MOTOR IC1251 MN2DS0018MA LSI MN2DS0018MA LSI 1 1 3 FE...

Page 4: ...F VIN3RF LPF 11 3M 5 7M Hz LPF 11 3M 5 7M Hz LPF 11 3M 5 7M Hz 0 1uF 0 1uF 0 1uF 0 1uF HPF HPF 1MHz 2 5MHz through Phase comparator LPF 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 comparator HPF 1MHz 2 5MHz through HPF 1MHz 2 5MHz through HPF 1MHz...

Page 5: ...cking pulling in Process the tracking drive hold with an OFTR 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 FODRV VHALF 1 Measurement and optimization of a signal l...

Page 6: ...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 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...

Page 7: ...acks 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 ...

Page 8: ...s 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 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...

Page 9: ... 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 results can be checked on the display in a test mode List of Automatic Adjustment Coefficients Caution All co...

Page 10: ...3 3 V 0 033 V IC1004 NJM2855DL1 33 1 2 Reg VCC12 1 2 V 0 015 V IC1953 S 1135D12 A6 DVD1chip 3 3 V SDRAM IC1480 M12L64164A 5TG2Y K Flash ROM 1 Program IC1402 S99 50243D K Other DVD1chip 1 2 V VD8V HOST Power Supply Mecha inside Power Supply Pick Up Unit CGY5100 N 1chip Driver IC1251 BA5839FP DVD LSI IC1501 MN2DS0018MA Supply IC Flash ROM 2 Data IC1401 S99 50243D K CXK8100 and CXK8101 are not equipp...

Page 11: ...o DAC in addition to the clock to be used in the LSI with the clock generator in DVD LSI CXK8100 and CXK8101 are not equipped with R1508 or IC1801 as they do not support analog audio output R1503 C1510 12 pF 1 Mohm X1501 CSS1823 A 27 MHz R1501 C1512 12 pF 156pin 155pin OSCO OSCI IC1501 DVD LSI MN2DS0018MA IC1801 Audio DAC PCM1753DBQ DACCLK 33 8688 MHz or 36 864 MHz 220 ohm R1508 1200 ohm ...

Page 12: ...01 C1804 as they do not support analog audio output 2 Digital Audio Signal IEC60958 IEC61937 It outputs the Digital Audio Signal IEC60958 IEC61937 coming from DVD LSI IC1501 through the HOST IF connector CN1901 Analog Audio Signal Digital Audio Signal Zo 820 ohm AVCC5 Radio audio circuit 5pin Lch Audio GND LS2 5 Mechanism module Audio DAC PCM1753 7pin Rch 4 6 8pin Audio GND fc 88 kHz MUTE Circuit ...

Page 13: ...it from HOST IF connector CN1901 DVD LSI DV5 VCC33 Zo 300 ohm LPF 75 ohm Video Driver 10pin CVBS 9 11pin Zo 300 ohm 12 14 16pin Cr Cb Y 11 13 15 17pin LS2 5 Mechanism module 138pin Composite CN1901 IC1501 200 ohm 100 ohm DVD LSI DV5 VCC33 LPF 75 ohm Video Driver LS2 5 Mechanism module 129pin Component Cr 130pin Component Cb 131pin Component Y CN1901 IC1501 ...

Page 14: ...ock input to SDRAM Clock input for data input from SDRAM Outline This is the memory for implementing the AV decoding function of DVD LSI IC1501 It can be used in various ways from buffering the stream data before decoding and serving as a work area during decoding to storing the AV and output data after decoding SDRAM Design Data bus range 16 bit Operating frequency 121 5 MHz CAS latency 3 8 word ...

Page 15: ...15 CX 3311 5 6 7 8 5 6 7 8 A B C D E F 2 MECHANISM DESCRIPTION 2 1 OUTLINE Mechanism Module Rear Bracket Upper Chassis Load Carriage Motor PU Unit Spindle Motor DVD Core Unit Damper Front Bracket ...

Page 16: ...16 CX 3311 1 2 3 4 A B C D E F 1 2 3 4 CRG Mechanism Clamp Arm ASSY Roller Arm ASSY SW Arm Disc Guide ASSY ...

Page 17: ...SW1 switches from OFF to ON When SW1 switched from OFF to ON the Load Carriage Motor starts and the Rubber Roller rotates 2 In the case of 12 cm disc as SW Arm R spreads widely SW1 switches from ON to OFF and the microcomputer judges that it is 12 cm disc Rubber Roller Load Carriage Motor PU Unit SW Arm R DISC SW1 ...

Page 18: ...D E F 1 2 3 4 2 3 DISC CENTERING MECHANISM 1 The 12 cm disc passes under the Guide Pin and the Centering Pin and is centered at the back position of mechanism Guide Pin Centering Pin 12 cm disc Centering Pin Guide Pin Guide Pin ...

Page 19: ...sc And when the Roller Arm turns the upper and bottom mechanism locks are released and clamp operation is completed 4 When the clamp operation is competed the control by the Cam on the Drive Lever is removed and the Switch Lock Arm turns 5 When the Switch Lock Arm turns the Switch Idle Gear moves away from the Rack Drive Gear engages with the Feed Screw Drive Gear and the carriage operation starts...

Page 20: ...EJECT OPERATION 1 When the Load Carriage Motor reverses and the PU moves SW2 to the inner circumference beyond ON the eject operation stars in the inverse process of the above description 2 Eject completion of 12 cm disc SW1 ON OFF ON OFF ON SW1 ...

Page 21: ...O HOLD MECHANISM 1 Hold the designated parts areas surrounded by blue dashed lines of Upper Chassis Front and Rear Bracket 2 Do not hold in the red areas or the CRG Mechanism Section or insert a foreign object Doing so may cause deformation Handling NG Handling OK ...

Page 22: ... white wire GND The mechanism is clamped and the PU moves to the outer circumference Note Do not apply the current when soldering of the CRG Motor Lead Wire is not removed IC and the PU may be damaged 3 Stop the motor when the PU reaches the intermediate circumference Note If the PU moves to the outermost circumference tooth jumping occurs There is no problem but prevent tooth jumping as much as p...

Page 23: ... Arm ASSY up to the status of Fig 2 b Open lock status 4 Put a finger on A part of Fig 2 c and slide it in the direction of arrow Direction of play state 5 Push the Clamp Arm down Note When the CRG Mechanism is returned to eject status install the Drive Gear after it is put to eject status by sliding the Drive Lever to prevent tooth break of the pinion of Drive Gear in the installation Joint Washe...

Page 24: ... to the CRG Motor Lead Wire to make it eject status white wire 4 V green wire GND 2 Hold the DVD CORE UNIT as shown in Fig 5 Be careful not to touch the SW Knob 3 Insert the DVD CORE UNIT into A hook and B hook simultaneously Fig 5 4 Push the DVD CORE UNIT down lightly and set it to the positioning dowel 5 Fix the DVD CORE UNIT with a screw while supporting C part with a finger as shown in the Fig...

Page 25: ...the green and white wires one time Fig 2 3 Twist the red and black wires two and half turns Fig 3 4 Make sure that the wound red and black wires are located in the positions shown in Fig 4 and Fig 5 Fig 2 Fig 1 Fig 4 Upper limit Fig 6 Lower limit Fig 3 Tips of the red and black wires should be below the CORE UNIT surface Tips of the wires should be above the top surface of Chassis They must not to...

Page 26: ...nt Spring is located within inside the bend Fig 3 Check that the Damper Shaft is located within the Centering Spring Fig 4 When assembling the CRG Mechanism create an empty clamp state according to 3 2 HOW TO CREATE EMPTY CLAMP STATUS MECHANISM MODULE MOTOR DRIVEN and press down the upper part of Damper of the CRG Mechanism so that the Damper and the CRG Mechanism ASSY are firmly in engagement wit...

Page 27: ...SY How to remove the Roller Transmission Side Gear 1 According to 3 6 HOW TO REMOVE THE CRG MECHANISM ASSY remove the CRG Mechanism ASSY Mechanism Eject status 2 According to 3 9 HOW TO REMOVE AND INSTALL THE CLAMP ARM ASSY remove the Clamp Arm ASSY 3 According to 3 11 HOW TO REMOVE THE DRIVE LEVER ASSY remove the Drive Lever ASSY 4 Remove the Biasing Spring of Roller ASSY Fig 3 5 According to the...

Page 28: ...g 3 while lightly pushing A part 6 Remove the Left Biasing Spring of Clamp Arm 7 Furthermore hold the Clamp Arm ASSY up to 45 60 and slide to the left then remove it Fig 1 How to install 1 Slide the Clamp Arm ASSY from the left and install to the support with it tipped 45 60 2 Tip the Clamp Arm ASSY to the position of Fig 3 position where it stops by contacting with the Chassis 3 Install the Left ...

Page 29: ...f Fig 6 Make sure to install the Biasing Spring of Switch Idle Arm Do not reuse the Joint Washer of Drive Gear and Idle Arm due to snap fit structure When the CRG Motor is installed move to the center of mechanism to completely engage the gear a Align the support hole of Worm Wheel with the plate hole b Engage the Idle Gear with the Worm Wheel c Adjust the positioning while checking the external f...

Page 30: ...ection of arrow 1 first install B part Fig 2 install C part of the Drive Lever Fig 4 in the groove of Chassis side bend and finally install D part Fig 4 in the L shaped groove of Chassis And then slide the Drive Lever to the state of Fig 1 1 If A part Fig 3 is not moved sufficiently the Drive Lever cannot be engaged suitably In this case the Idle Gear may be on the position of red dashed line Fig ...

Page 31: ...ing it and remove it Return Spring of SW Arm Fig 1 Fig 2 Expand the Right SW Arm until it contacts this point Expand the Right SW Arm 1 According to 3 9 HOW TO REMOVE THE CRG MECHANISM ASSY remove the CRG Mechanism ASSY 2 Insert the flathead screwdriver under A part of plate which is joined with the Damper raise the plate and release the clinch 3 Similarly insert the flathead screwdriver under C p...

Page 32: ...heck Go to FE section check Replace the unit Normal Go to FE section check Is 27 MHz OK Execute check 5 Is FE section normal Replace the unit FE section check Does the operation take time Is the life of flash memory OK Execute check 12 Is the sound in error Is AVCC5 voltage OK Execute check 8 Is DACCLK OK Execute check 9 Is the audio circuit OK Execute check 10 1 Do not handle by IC replacement ev...

Page 33: ...y OK Check Check the voltage at the STANBY test point while the power is on Check the DGND1 test point at the reference No Check point Module No Specification value Unit 1 STANBY DGND1 ALL VCC33 0 6 or more V Side A Fig 1 1 STANBY check point DGND1 STANBY ...

Page 34: ...GND1 test point at the reference No Check point Module No Specification value Unit 1 VDD5_1 DGND1 ALL 5 0 0 4 V 2 VCC33_1 DGND1 ALL 3 3 0 033 V 3 VCC12_1 DGND1 ALL 1 2 0 015 V Side A Fig 2 2 VDD5 VCC33 VCC12 voltage check points IC1401 FLASH power supply Data IC1402 FLASH power supply Program IC1480 SDRAM power supply IC1501 DV5 power supply IC1501 DV5 power supply IC1004 3 3 V output regulator IC...

Page 35: ...set OK Check Check the voltage at the NRES test point while the power is on Check the DGND1 test point at the reference No Check point Module No Specification value Unit 1 NRES DGND1 ALL VCC33 0 7 or more V Side A Fig 3 1 Reset check point NRES DGND1 ...

Page 36: ...k Check the voltage at the VSENS test point while the power is on Check the DGND1 test point at the reference No Check point Module No Specification value Unit 1 VSENS DGND1 ALL 0 95 1 07 V When VD8 8 0 0 4 V the range for VSENS value Side A Fig 4 2 VSENS check point IC1501 DV5 IC1004 regulator R1004 R1007 Voltage divider IC1953 1 2 V output regulator DGND1 VSENS ...

Page 37: ...thod Check the DGND1 test point at the reference while the power is on In case of NG check the applicable line periphery of IC1501 soldering of the peripheral components and defective components No Check point Module No Specification value Unit 2 IC1501 156pin DGND1 ALL 27 MHz 50 ppm GND Fig 5 2 Clock specification value Side A Fig 5 3 27 MHz check point IC1501 DVD LSI X1501 27 MHz crystal VCC33 V...

Page 38: ...10 MA9 IC1480 34pin IC1501 194pin 56 ohm 5 11 MA10 IC1480 22pin IC1501 199pin 56 ohm 5 12 MA11 IC1480 35pin IC1501 192pin 56 ohm 5 13 MDQ0 IC1480 2pin IC1501 160pin 56 ohm 5 14 MDQ1 IC1480 4pin IC1501 162pin 56 ohm 5 15 MDQ2 IC1480 5pin IC1501 164pin 56 ohm 5 16 MDQ3 IC1480 7pin IC1501 168pin 56 ohm 5 17 MDQ4 IC1480 8pin IC1501 170pin 56 ohm 5 18 MDQ5 IC1480 10pin IC1501 172pin 56 ohm 5 19 MDQ6 IC...

Page 39: ...39 CX 3311 5 6 7 8 5 6 7 8 A B C D E F Side A Fig 6 2 SDRAM I F check point Check point 2 IC1501 Check point 1 IC1480 ...

Page 40: ... the voltage at the VD8_P VD8_A and VCC5_1 test point while the power is on Check the PGND1 and AGND1 test point at the reference No Check point Module No Specification value Unit 1 VD8_P PGND1 ALL 8 0 0 4 V 2 VD8_A AGND1 ALL 8 0 0 4 V 3 VCC5_1 AGND1 ALL 5 0 0 05 V Side A Fig 7 2 VD8 VCC5 voltage check points F E driver system Power supply for PU Regulator IC for VCC 5 V AGND1 ...

Page 41: ...uration Check Playback DVD REF A1 TITLE 1 and check the voltage at the stylus Check the PGND_3 and GNDAU1 test point at the reference No Check point Module No Specification value Unit 1 VD8_A PGND_3 ALL 8 0 0 4 V 2 VCC5_AU GNDAU1 ALL 5 0 0 05 V Side A Fig 8 2 VD8 AVCC5 voltage check points IC1801 Audio DAC IC1003 Regulator IC for AVCC 5 V ...

Page 42: ...t at the reference In case of NG check the applicable line periphery of IC1501 soldering of the peripheral components and defective components No Check point 1 stylus Media Specification value 1 Specification value 2 Specification value 3 1 DACCLK DVD 2 0 V VCC33V DGND 0 8 V 36 8640 MHz 300 ppm 2 DACCLK CD 2 0 V VCC33V DGND 0 8 V 33 8688 MHz 300 ppm GND Fig 9 2 Clock specification value Side A Fig...

Page 43: ...t necessary as IEC is not supported CN1901 HOST I F IECOUT LRCK LO ADOUT SRCK RO GNDAU Fig 10 1 Audio circuit Check method Playback DVD REF A1 TITLE 2 CHAPTER 1 48 k 16 bit 1 kHz 0 dB and check the DGND1 test point at the reference In case of NG check the applicable line periphery of major components in the above drawing soldering of the peripheral components and defective components No Check poin...

Page 44: ...uits with GNDAU1 at the reference No Check point 1 stylus Specification value rms Reference waveform 4 LO 1400 150 mV Waveform 4 5 RO 1400 150 mV Waveform 4 Fig 10 4 Analog audio out LO RO specification value Side A Fig 10 5 Analog audio out check points Specification value is the effective value rms 47 kohm 47 kohm LO RO GNDAU1 ...

Page 45: ...oint 1 stylus Specification value 1 Specification value 2 Reference waveform 6 IEC VCC33V 0 6 V or more 0 4 V or less Waveform 5 Fig 10 6 Digital audio signal IECOUT specification value Side A Fig 10 7 Digital audio signal IECOUT check point IEC DGND1 Specification value 1 Specification value 2 ...

Page 46: ...dering of the peripheral components and defective components PEAK COMPOSITE signal Reference value Color burst Pedestal level BOTTOM Horizontal sync signal Fig 11 2 Waveform for the case of composite white 100 output Component checking method Playback DVD REF A1 TITLE2 CHAPTER19 100 COLORBAR and monitor COMPONENT Y Cb Cr signal with an oscilloscope with GNDV2 test point stylus at the reference Set...

Page 47: ...for the case of component 100 color bar output Side A Fig 11 4 VIDEO signal check points PEAK Specification value BOTTOM PEAK Specification value 100 Color Bars signal BOTTOM PEAK Specification value Cb signal Cr signal Y signal BOTTOM Cr Cb COMPOSITE GNDV2 Y ...

Page 48: ...lity that the flash memory has reached its life Make judgment regarding the flash memory life by looking at the display of the LD energizing time 1 Displaying the LD energizing time Refer to the FE test mode for the method of displaying the LD energizing time 2 If the second digit from the left of the energizing time display is showing E it means that the flash memory has reached its life Example ...

Page 49: ... V div 5 μsec div Reference voltage GNDAU1 2 V div 500 μsec div Waveform 1 Waveform 4 CH1 SRCK CH1 IECOUT Reference voltage DGND1 1 V div 1 μsec div Reference voltage DGND1 1 V div 500 nsec div Waveform 2 Waveform 5 CH1 LRCK Reference voltage DGND1 1 V div 5 μsec div Waveform 3 Gt Gt Gt Gt Gt Gt ...

Page 50: ...GNDV2 200 mV div 10 μsec div Waveform 6 Gt 100 Color Bar CH1 Cb Reference voltage GNDV2 200 mV div 5 μsec div Waveform 8 Gt 100 Color Bar CH1 Y Reference voltage GNDV2 200 mV div 5 μsec div Waveform 7 Gt 100 Color Bar CH1 Cr Reference voltage GNDV2 200 mV div 5 μsec div Waveform 9 Gt ...

Page 51: ... connected to GND Further since the body frame of most measurement devices have the same electrical potential as the minus side of the probe the body frame of the measurement device should be set to floating ground If the reference voltage is connected to GND by mistake turn the regulator OFF immediately or turn the power OFF Remove the wires used for measurements only after the regulator has been...

Page 52: ...ptical output level of PU laser diode should be installed on DVD Core Unit in the DVD mecha module Therefore in the replacement of DVD Core Unit Power adjustment should be implemented The Power adjustment method of mecha module is shown below Items to be Prepared Measuring instrument Oscilloscope digital or analog Frequency band of oscilloscope in DVD whose frequency is higher than CD Adjustable 1...

Page 53: ...pe Power adjustment standard RF level adjustment value Focus Close STEP 10 24 DVD CD RF waveform after the completion of all adjustment waveform measured by analog oscilloscope DVD 848 mV to 892 mV CD 658 mV to 702 mV 200 mV to 1200 mV 200 mV to 1200 mV Adjust VR in order that this width is within the range of target RF level adjustment value Adjust VR in order that this width is within the range ...

Page 54: ...102 If Focus Close is not reached after the 3rd VR adjustment replace the Mechanism Unit Service 11 Conduct Power adjustment Conduct the adjustment in the state of Focus Close 12 Execute until Tracking Close is reached 13 Conduct Power adjustment Conduct the adjustment in the state of Tracking Close 14 Check the ERR rate after Power adjustment 15 Power off 16 Return to the original position 17 Set...

Page 55: ...the adjustment in the state of Focus Close 28 Check ERR rate 29 Power off 30 Return to the original position 31 Set up again setting of CD layer and conduct the final check of RF level and ERR rate Check in the state of Tracking Close 32 Eject 33 Take out CD TCD 782 34 Power off Adjust the angle at the D cut position to the initial position initial position shown in Fig 2 1st 2nd 3rd CD VR1101 30 ...

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