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SERVICE/TRAINING MANUAL

1. Data Backup lt 10 Do one of the following gt gt Cool 443 443 443 512 512 512 Off WIB lt gt Set Menu Exit P gt gt gt gt gt gt gt gt make changes to one of the other Temperature types repeat steps 5 through 9 b To exit Factory mode press POWER KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 60 S ONY is a trademark of Sony Electronics Reproduction in whole or part without written permission is prohibited All rights reserved Sony Corporation Sony Technology Center Technical Services 9 883 851 02 Service Publication Department KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 English 2011AJ74WEB 1 Printed in USA 2011 1 61 APPENDIX A TRIAGE SHEETS rs The following Triage documents are for general reference purposes To access the most recent version of the Triage documents for the models listed in this manual login into the Sony Authorized Servicer Portal at www sony com asp Sony KDL32BX320 32BX321 Technical Triage Summary Sheet Before you make the service call 1 Confirm the symptom from the customer 2 Select that symptom from the chart CHASSIS AZ2UK 3 Bring all the boards listed for that symptom 4 Follow the troubleshooting charts in the technical guides to isolate the board 5 Chart Color Code RED DOT Most likely defective part BLUE TRIANGLE Secondary possible d
2. SOFTWARE UPDATE RESPONSIBILITV Software updates are designed to be performed the customer Warrantv repairs in which the issue can be resolved bv a software update are not reimbursable Most issues involving software updates are handled bv the customer service center and should not be directed to an authorized service center It is the responsibilitv of the servicer to prevent service calls for issues that involve software updates Exceptions to this are certain cases wherebv the customer is unable or unwilling to perform the task In this situation the servicer will be notified and receive the proper authorization for reimbursement It is the servicer s responsibilitv however to make certain that anv TV requiring a legitimate service is running the latest software version and to install it if necessarv CHECKING THE SOFTWARE VERSION The easiest wav to check the version of software that is currentiv on the TV is to access the Contact Sonv screen bv using the customer menu Please contact Sony directly if you have questions on the use of your television Website Support United States Phone Contact Canada Phone Contact Other Countries Contact www sony com tvsupport 1 800 222 SONY 7669 1 877 899 SONY 7669 Consult the Warranty Card Please have the following information available Model Name Serial Number Software Version KDL 40BX420 See rear or side of TV 0 12 3000 L RETURN ERIS FIGURE 2
3. KDL 40BX421 FOR USICND ONLY BRACKET VESA 6 GW 251 POWER SUPPLY CORD WITH CORE KDL 40BX420 40BX421 ONLY COVER UNDER GW37 KDL 40BX420 40BX421 ONLY REF NO PART NO 255 4 264 316 01 256 4 264 315 01 257 1 858 572 11 258 1 895 019 11 259 1 489 627 11 A 7 685 647 79 B 7 685 648 79 O 2 580 640 01 4 159 298 01 BRACKET SP GW40L KDL 40BX420 40BX421 ONLY BRACKET SP GW40R KDL 40BX420 40BX421 ONLY LOUDSPEAKER 4 0X10 0CM H BOARD MOUNTED SWITCH UNIT SCREW BVTP2 3X12 SCREW BVTP 3X12 2 IT 3 SCREW BVTP2 4X16 SCREW PSW 4 10 41 SECTION 6 DISASSEMBLY PART NUMBER INFORMATION NOTE The components identified by shading NOTE Les composants identifies per un trameet NOTE The components identified by a red outline and a mark contain KD L 4 6 B X 42 0 4 6 B X 421 O N LY and Z mark are critical for safety Replace only une marque sont critiques pour la securite confidential information Specific instructions must be adhered to whenever 7 with part number specified Ne les remplacer que par une piece portant le these components are repaired and or replaced numero specifie See Appendix A Encryption Key Components in the back of this manual Remove 8 screws from Rear Cover L S ats mal Remove 1 screw from Side Bracket position Check the Sony Authorized Servicer Portal at www sony com asp for any additional
4. Remove 4 screws and disconnect 5 connectors from A Board to detach from PSU and MB Brackets Release 2 clips and slide out Side Bracket to detach from A Board Remove 4 screws and disconnect 3 connectors from G13 Board to detach from PSU Brackets Remove 2 screws from MB Bracket to detach from LCD Panel Remove 1 screw from PSU Bracket Left to detach from LCD Panel Remove 1 screw from PSU Bracket Left to detach from Bottom Frame Remove 2 screws from PSU Bracket Right to detach from Bottom Frame and LCD Panel Remove 2 screws from Vesa Brackets to detach from PSU Brackets Remove 2 screws from Bottom Frame to detach from LCD Panel Slide out 2 Panel Brackets to detach from Bezel Carefully lift up LCD Panel to remove from Bezel 60000000060 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 NOTE The components identified by shading NOTE Les composants identifies per un trame et NOTE The components identified by red outline and a mark contain and N mark are critical for safety Replace only une marque sont critiques pour la securite confidential information Specific instructions must be adhered to whenever with part number specified Ne les remplacer que par une piece portant le these components are repaired and or replaced numero specifie See Appendix A Encryption Key Components in the back of this manual Check the Sony Authorized Servicer Portal at www sony com asp for any additional ser
5. une marque sont critiques pour la securite Ne les remplacer que par une piece portant le NOTE The components identified by a red outline and a mark contain confidential information Specific instructions must be adhered to whenever these components are repaired and or replaced numero specifie REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES REF NO PART NO See Appendix A Encryption Key Components in the back of this manual DESCRIPTION ASSEMBLY INCLUDES 101 4 270 691 11 REAR COVER GW32 105 KDL 32BX320 32BX321 32BX420 ONLY KDL 32BX421 FOR MX ONLY 106 101 4 270 691 01 REAR COVER GW32 KDL 32BX421 FOR USICND ONLY 102 4 266 658 01 BRACKET VESA M6 GW 101 107 108 103 1 838 980 11 POWER SUPPLY CORD WITH CORE 109 KDL 32BX320 32BX321 32BX420 32BX421 ONLY 104 4 264 311 01 UNDER GW26 A KDL 32BX320 32BX321 32BX420 32BX421 ONLY E LI e Q 4 264 313 01 4 264 312 01 1 858 572 11 1 857 898 21 1 489 627 11 7 685 647 79 7 685 648 79 2 580 640 01 2 580 595 01 2 580 600 01 BRACKET SP GW32L KDL 32BX320 32BX321 32BX420 32BX421 ONLY BRACKET SP GW32R KDL 32BX320 32BX321 32BX420 32BX421 ONLY LOUDSPEAKER 4 0X10 0CM H BOARD MOUNTED SWITCH UNIT SCREW BVTP2 3X12 SCREW BVTP 3 12 IT 3 SCREW BVTP2 4X16 SCREW PSW M3X12 SCREW PSW M4X8 38 FOR SERIAL RANGES LISTED BELOW KDL 32BX320 3000001 38000
6. 16 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 i TABLE OF CONTENTS _ Diagnostic Code Descriplions screens 28 Viewing the Self Check Diagnostic History 29 Clearing the Self Check Diagnostic List 30 Exiting the Self Check diagnostic 30 TESEP OMIS e a RP 30 Section 5 Flow Charts and Diagrams 31 Video Information 31 Power Supply Information 33 Protection g eb 34 Section 6 Disassembly Part Number Information 36 Table Top Stand Assembly 36 Rear Cover and Speakers 38 KDL 32BX320 32BX321 32BX420 32BX421 Only 38 KDL 40BX420 40BX421 Only 40 KDL 46BX420 46BX421 42 A Main Board G13 G14 G3 Power Supply Board and LCD Panel Removal e 43 KDL 32BX320 32BX321 Only 43 KDL 32BX420 32BX421 Onlv 45 KDL 40BX420 40BX421 47 KDL 46BX420 46BX421 49 Cleaning the LCD Panel Pere 49 SQ GUNG deiina d 50 Lco L eiie c
7. 2581 429 1 X 2580 731 1 X 2581 430 1 X 2580 732 1 4 166 866 01 4 273 641 01 4 166 870 01 4 266 672 01 DESCRIPTION ASSEMBLY INCLUDES BASE M3B ASSEMBLY FOR US CND KDL 32BX320 32BX420 32BX421 ONLY BASE M5B ASSEMBLY FOR MX KDL 32BX321 32BX421 ONLY BASE ML3B ASSEMBLY KDL 40BX420 40BX421 ONLY BASE ML5B ASSEMBLY KDL 40BX421 ONLY COVER STAND FOR US CND 51 KDL 32BX320 32BX420 32BX421 ONLY COVER STAND M5B FOR MX 51 KDL 32BX321 32BX421 ONLY COVER STAND ML3B 51 KDL 40BX420 40BX421 ONLY COVER STAND ML5B 51 KDL 40BX421 ONLY NOTE The components identified by a red outline and a mark contain confidential information Specific instructions must be adhered to whenever these components are repaired and or replaced See Appendix A Encryption Key Components the back of this manual REF NO PART NO 53 53 54 54 55 4 166 867 01 4 166 871 01 4 166 864 01 4 166 868 01 2 580 608 01 DESCRIPTION COVER NECK M3B KDL 32BX320 32BX321 32BX420 32BX421 ONLY COVER NECK ML3B KDL 40BX420 40BX421 ONLY ASSEMBLY INCLUDES NECK M38 KDL 32BX320 32BX321 32BX420 32BX421 ONLY NECK ML3B KDL 40BX42040BX421 ONLY SCREW PSW M5X16 SCREWS TO ATTACH TABLE TOP STAND TO LCD TV For product protection and safety reasons Sony strongly recommends that you use the screws provided with the TV
8. CAUTION These screws cannot be used to secure the TV to the Wall Mount Brackets 2 580 608 01 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 SCREW PSW 5 16 37 REAR COVER AND SPEAKERS REMOVAL KDL 32BX320 32BX321 32BX420 32BX421 ONLY FOR SERIAL RANGES LISTED BELOW KDL 32BX320 6000001 7400000 KDL 32BX321 7100001 7400000 KDL 32BX420 6000001 7200000 KDL 32BX421 6000001 7200000 9 Remove 9 screws from Rear Cover B Remove 1 screw from Side Bracket position Remove 1 screw from Terminal Area position D Remove 2 screws from Rear Cover Gently lift up Rear Cover from bottom side to detach from Bezel D Lift up AC Power Cord and disconnect 1 connector from G13 Board to detach from Under Cover G Remove 1 screw from Under Cover B Remove 1 screw from Left Speaker Bracket to detach from Bezel D Remove 2 screws from Speaker to detach from Left Speaker Bracket Q Release clips and disconnect 1 connector to detach H Board from LED Guide Remove 1 screw from Right Speaker Brackets to detach from Bezel D Remove 2 screws from Speaker to detach from Right Speaker Bracket Lift up Switch Unit and disconnect 1 connector to detach from Bezel KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 NOTE The components identified by shading and Z mark are critical for safety Replace only with part number specified NOTE Les composants identifies per un trame et
9. SCREW PSWM3xi RCIoPNLTOPCNIRQ O O 2 258060001 JscREW sPSWMAx8 2 580 592 01 sCREW PSW M3X8 A BOARD 4 G13 BOARD 4 MB BRKT to PANEL 2 2580 59901 SCREW PSWM4x VESABRKTSQ BIMFRM2 O O oC KDL 40BX420 40BX421 ALL SERIAL NUMBER RANGES PN DESCRIPTION 2 222 5 2 SPKR RO 2 580 640 01 SCREW BVTP2 4X16 KDL 46BX420 46BX421 ALL SERIAL NUMBER RANGES PN DESCRIPTION TABLE TOP STAND 4 701 1 910 103 38 SPKR L 2 SPKR R 2 2 580 640 01 SCREW BVTP2 4x16 13 701 1 910 103 41 2 580 595 01 SCREW PSW M3X12 NOT IN IS MODEL 2101 2 580 600 01 _ SCREW Pswmaxe THIS MODE 2 580 599 01 SCREW PSWM4X NOTINTHISMODEL RC 4 BTM FRM 2 CVR 1 SWITCH UNIT ES L ILU LO gt LO LO REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES LVDS CONNECTOR ASSEMBLY 32 51P KDL 32BX320 32BX321 ONLY LVDS CONNECTOR ASSEMBLY 32 51P KDL 32BX420 32BX421 ONLY FOR PANEL LVDS CONNECTOR ASSEMBLY 32 51P KDL 32BX420 32BX421 ONLY FOR S LCD PANEL 701 1 910 103 42 ES L ILU LO KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 50 SECTION 6 DI
10. See Appendix A Encryption Key Components in the back of this manual FOR SERIAL RANGES LISTED BELOW Check the Sony Authorized Servicer Portal at www sony com asp for any additional service related issues for this model KDL 32BX420 6000001 7200000 KDL 32BX421 6000001 7200000 Remove 4 screws and disconnect 5 connectors from A Board to detach from LCD Panel Release 2 clips and slide out Side Bracket to detach from A Board Remove 4 screws and disconnect 3 connectors from G13 Board Remove 2 screws from MB Bracket to detach from LCD Panel Remove 2 screws from Vesa Brackets to detach from Bottom Frame Remove 2 screws from Bottom Frame to detach from LCD Panel Slide out 2 Panel Brackets to detach from Bezel Carefully lift up LCD Panel to remove from Bezel 20690600060 PART NO DESCRIPTION ASSEMBLY INCLUDES REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES 451 4 210 690 11 BEZEL GW32 5 455 1 857 903 41 ABOARD COMPLETE KDL 32BX420 32BX421 ONLY KDL 32BX421 FOR US CND ONLY 452 4 165 056 01 PANEL SUPPORT B AFTER REPLACING THE MAIN BOARD OR THE LCD PANEL KDL 32BX420 32BX421 ONLY YOU MUST UPDATE THE SOFTWARE TO THE LATEST VERSION 453 NA LCD PANEL 456 1 474 297 12 G13 BOARD COMPLETE FOR ALL LCD PANEL AND TCON BOARD PART NUMBER KDL 32BX420 32BX421 ONLY INFORMATION REFER TO THE LCD PANELS SERVICE MANUAL 457 4 266 636 01 BRACKET VESA GW32 454 4 264 318 01 BRACKET
11. 01 SCREW BVTP2 4X16 4 159 298 01 SCREW PSW 4 10 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 42 SECTION 6 DISASSEMBLY PART NUMBER INFORMATION S A MAIN BOARD G13 G14 G3 POWER SUPPLY BOARD AND LCD NOTE The components identified by shading and Z mark are critical for safety Replace only with part number specified NOTE Les composants identifies per un trame et une marque sont critiques pour la securite Ne les remplacer que par une piece portant le PANEL REMOVAL KDL 32BX320 32BX321 ONLY FOR SERIAL RANGES LISTED BELOW KDL 32BX320 6000001 7400000 KDL 32BX321 7100001 7400000 Remove 4 screws and disconnect 5 connectors from A Board to detach from MB Brackets Release 2 clips and slide out Side Bracket to detach from A Board Remove 4 screws and disconnect 3 connectors from G13 Board to detach from PSU Brackets Remove 2 screws from MB Brackets to detach from Bezel Remove 2 screws from MB Brackets to detach from PSU Bracket Left Remove 2 screws from Vesa Brackets to detach from PSU Brackets Remove 4 screws from PSU Brackets to detach from LCD Panel and Top Frame Remove 2 screws from Bottom Frame to detach from LCD Panel Remove 2 screws from Top Frame to detach from LCD Panel Slide out 2 Panel Brackets to detach from Bezel 9 Carefully lift up LCD Panel to remove from Bezel O000 000 0006 REF NO PART NO num
12. 1 SOFTWARE VERSION ON THE CONTACT SONY SCREEN KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 15 SECTION 2 SOFTWARE REQUIREMENTS x T1 EXAMPLES SOFTWARE CORRECTABLE SYMPTOMS Always check the Sony Authorized Servicer Portal at www sony com asp site for any known and or listed issues that are software related Most symptoms that are correctable by software updates involve communications issues with other devices or minor glitches in the operation of a specific function Below is a list of some of the symptoms that may be corrected with a software update Fluctuations in picture brightness e Intermittent picture freezing or noise e Problems with certain inputs especially HDMI e ntermittent or distorted audio Erratic remote control operation Unit turns on and off by itself Loss of color e Internet connectivity e Certain features not working correctly photo or video file viewing KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 16 SECTION 3 CHASSIS OVERVIEW OVERVIEW The primary circuits contained in this chassis consists of a main circuit board designated as the A board power supply board G13 for the 32 G14 for the 40 and G3 for the 46 Timing Control TCON and the LCD panel assembly The remaining boards contain switches and LED s NOTE For connector part number information refer to Connectors on page 50 For Wire Dressing informa
13. B KDL 32BX420 32BX421 40BX420 40BX421 ONLY 4 289 497 01 SHEET INSULATION 6740 G KDL 40BX420 40BX421 ONLY 4 087 858 41 SHEET VIBRATION PROOF KDL 32BX420 32BX421 40BX420 40BX421 ONLY X 2348 140 3 SUPPORT BELT KIT REMOTE COMMANDER 1 489 459 11 REMOTE COMMANDER RM YD065 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 53 SECTION 6 DISASSEMBLY PART NUMBER INFORMATION ee WIRE DRESSING mom FIGURE 6 1 KDL 32BX320 OVERALL WIRE DRESSING FIGURE 6 3 KDL 32BX320 OVERALL WIRE DRESSING SERIAL NO RANGE 6000001 7400000 SERIAL NO RANGE 3000001 3800000 AND 5000001 5500000 FIGURE 6 2 KDL 32BX420 OVERALL WIRE DRESSING KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 54 SECTION 6 DISASSEMBLY PART NUMBER INFORMATION FIGURE 6 5 KDL 46BX420 OVERALL WIRE DRESSING KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 55 SECTION 7 SERVICE ADJUSTMENTS OVERVIEW As mentioned in Section 2 Software Requirements on page 14 the models in this manual utilize a type main board therefore certain service adjustments settings must be changed or confirmed when either the main Board LCD Panel or TCON Board are replaced UPDATING THE SOFTWARE After replacing the main Board LCD Panel or TCON Board you MUST UPDATE the SOFTWARE to the latest version Instructions for updating the software are included with the software package on the Son
14. M6 length refer to diagram in Operating Instruction manual Mass with stand kg 20 1 15 7 10 7 Ib 443 346 23 6 without stand kg 17 7 13 6 9 1 Ib 39 0 30 0 20 1 Supplied accessories Remote control RM YD065 1 Size AA batteries 2 Operating Instructions 1 Quick Setup Guide common to all models 1 Warranty Card 1 Safety and Regulatory Booklet 1 Software License 1 Stand installation guide 1 Table Top Stand 1 set individual models Screw 7 Optional accessories Connecting cables Support Belt Kit Wall Mount Bracket SU WL500 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 15 SECTION 2 SOFTWARE REQUIREMENTS OVERVIEW SOFTWARE UPDATES FOR CUSTOMERS There are 2 reasons for updating the software on the TVs The subject of software updates is a very important The televisions of today have advanced to the point where they are not simply a e Software updates for customers television anymore They are evolving into devices that are designed These updates are for enhancements or improvements that to integrate with numerous other devices found in the home Some have been made to the software after the TV was released examples are Portable audio and video devices still cameras home These updates are accessed by the customer from the Sony computer networks and accessing the internet to name a few Support Site at http esupport sonv com MA Communications wi
15. SECTION 4 TROUBLESHOOTING p X CLEARING THE SELF CHECK DIAGNOSTIC LIST TEST POINTS Since the diagnostic results displayed on the screen are not automatically cleared always check the self diagnostic history after you have completed the repairs to be sure you have cleared the result display to 0 Figure 5 5 Power and Control Block Diagram on page 35 contains the board to board connector and pin information to identify voltages signal and control lines for troubleshooting purposes All critical voltages and control signals are easily accessed at the power supply 1 To clear the Error history and Error count Press the board Use this drawing in conjunction with the previously discussed Channel gt Channel 0 troubleshooting techniques and flowcharts availalbe in Section 5 To clear the Panel operation time Press the Channel Flow Charts and Diagrams on page 31 for testing operating voltages gt Channel o and control signals EXITING THE SELF CHECK DIAGNOSTIC SCREEN 1 To exit the Self Diagnostic Self Check screen turn off the power to the TV by pressing the POWER button on the remote or the POWER button on the TV KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 30 SECTION 5 FLOW CHARTS AND DIAGRAMS Backlights turned on VIDEO INFORMATION Any OSD graphics present Unplug LVDS connector at TCON while unit is running This may need to b
16. Video Input Switch All analog video sources are selected and A D converted and scaled if necessary to 1280 X 720p 60HZ resolution Digital Audio and Video Decoder The MPEG2 and Digital Dolby audio streams are received from the tuner for decompression All video sources which are not native 1280 X 720p 60HZ are scaled to this resolution Digital audio content is output to the class D amplifier for processing and amplification Audio Processing Analog audio sources are selected and A D converted directly by U3 The audio information is then processed KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 and processed Class D amplifier U8 provides the drive for the speakers HDMI Input and Switching The customer can select the or HDMI2 input Each HDMI input contains a dedicated EDI NVM not shown to provide display information data to any device connected via the HDMI inputs CPU The CPU internal to the MT5388 processor controls all aspects of the television functions Input from the user along with monitoring of critical circuits is also performed by this CPU LVDS Transmitter Integrated into U3 is a Low Voltage Differential Signaling LVDS transmitter This circuit converts the 8 bit parallel RGB video information into a set of high speed serial lines for noise free transmission to the TCON circuits located internally to the LCD panel POWER SUPPLY There are 3 different power supply boards used in
17. e e e e e A 1 857 903 31 id G13 BOARD e e A 1 474 297 12 156 H BOARD e 1 857 898 21 d SEE LCD PANEL LCD Panel dii A MANUAL A e e Problem POWER POWER PANEL TEMP FIGURE APPENDIX A 2 KDL 32BX420 MODELS ONLY KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 A 2 Sony KDL32BX421 Technical Triage Summary Sheet Before you make the service call Confirm the symptom from the customer Reference A BOARD G13 BOARD H BOARD 1 2 Select that symptom from the chart CHASSIS AZ2UK 3 Bring all the boards listed for that symptom 4 Follow the troubleshooting charts in the technical guides to isolate the board 5 Chart Color Code RED DOT Most likely defective part BLUE TRIANGLE Secondary possible defective part LAST UPDATED 1 18 11 BLACK TEXT Board and Part that may correct the symptom Power LED No blinking red diagnostics Power Video missing or distorted Remote No Green Stationary Video 2 No video No Power LED colored lines Tuner Only No Audio REF 2 3 5 6 7 Dead Set or dots Only all Inputs Remote Part 1 857 903 41 e e A e e e e FOR US CND MODELS 1 857 903 31 FOR MX LA MODELS 155 e e 1 474 297 12 156 1 857 898 21 57 A A SEE LCD PANEL MANUAL LCD Panel Problem A e e POWER POWER TEMP FIGURE APPENDIX
18. screw from Under Cover Remove 1 screw from Left Speaker Bracket to detach from Bezel D Remove 2 screws from Speaker to detach from Left Speaker Bracket D Release clips and disconnect 1 connector to detach H Board from LED Guide OQ Remove 1 screw from Right Speaker Brackets to detach from Bezel D Remove 2 screws from Speaker to detach from Right Speaker Bracket Lift up Switch Unit and disconnect 1 connector to detach from Bezel KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 NOTE The components identified by shading and Z mark are critical for safety Replace only with part number specified Check the Sony Authorized Servi REF NO Il numero specifie Ne les remplacer que par une piece portant le NOTE Les composants identifies per un trame et SECTION 6 DISASSEMBLY PART NUMBER INFORMATION NOTE The components identified by a red outline and mark contain 7 une marque sont critiques pour la securite confidential information Specific instructions must be adhered to whenever these components are repaired and or replaced ditional service related issues for this model PART NO DESCRIPTION ASSEMBLY INCLUDES DESCRIPTION ASSEMBLY INCLUDES 251 4 288 560 11 4 288 560 01 4 266 658 01 1 838 981 11 4 264 314 01 REAR COVER GF40 KDL 40BX420 ONLY KDL 40BX421 FOR MX ONLY REAR COVER GF40
19. service related issues for this model Remove 1 screw from Terminal Area position Remove 4 screws from Rear Cover Gently lift up Rear Cover from bottom side to detach from Bezel Lift up AC Power Cord and disconnect 1 connector from G3 Board to detach from Under Cover Remove 1 screw from Under Cover Remove 1 screw from Left Speaker Bracket to detach from Bezel Remove 2 screws from Speaker to detach from Left Speaker Bracket Release clips and disconnect 1 connector to detach H Board from LED Guide Remove 1 screw from Right Speaker Brackets to detach from Bezel Remove 2 screws from Speaker to detach from Right Speaker Bracket Lift up Switch Unit and disconnect 1 connector to detach from Bezel 90660000 0000900 REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES 301 4 270 697 11 REAR COVER GW46 305 4 266 611 01 BRACKET SP GW46L KDL 46BX420 ONLY KDL 46BX420 46BX421 ONLY 301 4 270 697 01 REAR COVER GW46 306 4 266 610 01 BRACKET SP GW46R KDL 46BX421 ONLY KDL 46BX420 46BX421 ONLY 302 4 266 658 01 BRACKET VESA M6 GW 301 307 1 858 572 11 LOUDSPEAKER 4 0X10 0CM A 303 1 838 981 11 SUPPLY CORD WITH CORE 308 1 857 898 21 H BOARD MOUNTED KDL 46BX420 46BX421 ONLY 309 1489 627 11 SWITCH UNIT 304 4 266 609 01 COVER UNDER GW46 KDL 46BX420 46BX421 ONLY A 7 685 647 79 SCREW BVTP2 3X12 7 685 648 79 SCREW BVTP 3X12 IT 3 x 2 580 640
20. the models in this manual The type of board depends on the size of LCD panel They are G13 for the 32 models G14 for the 40 models G3 for the 46 models There are 2 distinct sections on the power supply Standby Supply Continuously operational as long as AC power is applied the standby supply generates 3 3VDC for the circuits requiring power while the unit is turned off An unregulated 15 volt line is present to provide power to the main relay PFC and main power supply at turn on 19 SECTION 3 CHASSIS OVERVIEW Main Supply Once the power supply receives power on command from the CPU on the A board the main switching supply is turned on to provide a regulated 12V source a dedicated un regulated 15V for the audio circuits and an unregulated 24V source for the inverter circuit INVERTER The inverter receives the unregulated 24V from the power supply board and generates the required high voltage AC to power the backlight lamps A control line to turn on the inverter backlights on is used in conjunction with a dimmer control to vary the light level of the CCFL lamps As of the writing of this manual the inverter is not available as a replacement part The LCD panel assembly must be replaced SWITCH UNIT This board contains the power channel and volume up down and menu buttons H BOARD The power standby and timer LED s are located on this board along with the IR remote receiver a
21. to your favorite music KDL46BX420 Simply connect your digital camera USB enabled MP3 player or USB storage device directly to your HDTV s USB input KDL46BX421 The chassis design revolves around the video processing circuits LIGHTSENSOR TECHNOLOGY located on the A board The key difference between models is Enjoy customized picture brightness and save energy without lifting determined by the size ofthe LCD panel and its manufacturing source a finger The built in Light Sensor automatically adjusts the picture This manual will describe the new circuit features and individually brightness based on the amount of light in the room describe the models based on these differences 5 HD INPUTS Get versatile HD connection options with five HD inputs including two HDMI inputs two HD component inputs provide added HD capable connectivity in addition a PC input HD 15 pin lets you use your HDTV as a computer monitor KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 10 SECTION 1 SAFETY AND FEATURES ies BRAVIA SYNC COMPATIBLE Conveniently operate and control other BRAVIA Sync compatible devices including BRAVIA HDTVs Blu ray Disc Players surround sound systems Handycam camcorders and Cyber shot digital still cameras all with one remote control KDL 32BX320 32BX321 MODELS ONLY HD 720P RESOLUTION PANEL Enjoy crisp detailed and vibrant images in 720p picture quality while watchin
22. 00 NOTE The components identified by shading and Z mark are critical for safety Replace only with part number specified numero specifie une marque sont critiques pour la securite Ne les remplacer que par une piece portant le NOTE Les composants identifies per un trame et NOTE The components identified by a red outline and a mark contain confidential information Specific instructions must be adhered to whenever these components are repaired and or replaced KDL 32BX320 5000001 5500000 KDL 32BX321 5000001 5500000 KDL 32BX420 3000001 3800000 KDL 32BX420 5000001 5300000 KDL 32BX421 3000001 3800000 KDL 32BX421 5000001 5300000 Remove 9 screws from Rear Cover B Remove 1 screw from Side Bracket position O Remove 1 screw from Terminal Area position D Remove 2 screws from Rear Cover Gently lift up Rear Cover from bottom side to detach from Bezel D Lift up AC Power Cord and disconnect 1 connector from G13 Board to detach from Under Cover Remove 1 screw from Under Cover Remove 1 screw from Left Speaker Bracket to detach from Bezel D Remove 2 screws from Speaker to detach from Left Speaker Bracket Release clips and disconnect 1 connector to detach H Board from LED Guide 9 Remove 1 screw from Right Speaker Brackets to detach from Bezel D Remove 2 screws from Speaker to detach from Right Speaker Bracket Q Lift up Switch Unit and disconnect 1 connector to de
23. 2BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 14 SECTION 2 SOFTWARE REQUIREMENTS SSeS 20 SOFTWARE UPDATES FOR SERVICERS The models in this manual utilize a generic type main board In the past many different main boards needed to be stocked due to differences in software requirements The software loaded on the board was specific to the model and its features along with the type of LCD panel installed during production Replacement main boards are now stocked with basic software Once the replacement board is installed in the unit the most current software needs to be installed using a USB thumb drive containing the necessary software downloaded This new method of supplying main boards significantly reduces the complexity of replacing LCD panels and main boards Information about the LCD panel is stored on the TCON circuits This information is automatically loaded onto the main board when the TV is powered up With the correct software version the main board and or the TCON or LCD panel can be replaced more efficiently The software update and procedures for the software installation are located on the Sony Authorized Servicer Portal at http www sonv com asp In addition to software installation service adjustment information mav need to be modified or verified to complete the service of the TV Service adjustment information is covered in Section 7 Service Adjustments on page lt gt
24. 2BX321 7100001 7400000 with part number specified Ne les remplacer que par une piece portant le these components are repaired and or replaced KDL 32BX420 6000001 7200000 numero specifie See Appendix A Encryption Key Components in the back of this manual KDL 32BX421 6000001 7200000 KDL 40BX420 6000001 7400000 KDL 40BX421 6000001 7200000 KDL 46BX420 6000001 7400000 KDL 46BX421 6000001 7100000 Remove 4 screws from Table Top Stand Assembly Lift up TV set to detach from Table Top Stand Assembly Check the Sony Authorized Servicer Portal at www sony com asp for any additional service related issues for this model G O Gently place the TV set face down onto a soft cloth REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES 1 X 2581 429 1 BASE ASSEMBLY FOR US CND 3 4 166 864 01 NECK M3B KDL 32BX320 32BX420 32BX421 ONLY KDL 32BX320 32BX321 32BX420 32BX421 ONLY 1 X 2546 085 2 BASE M5B ASSEMBLY FOR MX 3 4 166 868 01 NECK ML3B KDL 32BX321 32BX421 ONLY KDL 40BX420 40BX421 46BX420 46BX421 ONLY 1 X 2581 430 1 BASE ML3B ASSEMBLY Soft Cloth KDL 40BX420 40BX421 ONLY 4 2 580 608 01 SCREW PSW M5X16 1 X 2581 431 1 STAND ASSEMBLY L3B SCREWS TO ATTACH TABLE TOP STAND TO LCD TV KDL 46BX420 46BX421 ONLY For product protection and safety reasons Sony strongly recommends that you use the screws provided with the TV 2 4 16
25. 2UK 3 Bring all the boards listed for that symptom 4 Follow the troubleshooting charts in the technical guides to isolate the board 5 Chart Color Code RED DOT Most likely defective part BLUE TRIANGLE Secondary possible defective part LAST UPDATED 1 18 11 BLACK TEXT Board and Part that may correct the symptom No Video missing or distorted M No Power LED blinking red diagnostics Reference No Green Stationary Vi 2 No vid Power LED colored lines ideo 2 Tuner Only O video No Audio REF 2 3 5 6 7 Dead Set or dois Only all Inputs Remote Part 1 857 903 61 FOR US CND MODELS A BOARD e e a 1 857 903 51 FOR MX LA MODELS 155 G14 BOARD e e A 1 474 310 11 156 BOARD 1 857 898 21 57 SEE LCD PANEL LCD Panel A MANUAL e Problem POWER POWER PANEL TEMP FIGURE APPENDIX A 5 KDL 40BX421 MODELS ONLY KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 D Sony KDL46BX420 Technical Triage Summary Sheet Before you make the service call 1 Confirm the symptom from the customer 2 Select that symptom from the chart CHASSIS AZ2UK 3 Bring all the boards listed for that symptom 4 Follow the troubleshooting charts in the technical guides to isolate the board 5 Chart Color Code RED DOT Most likely defective part BLUE TRIANGLE Sec
26. 6 867 01 COVER NECK M3B CAUTION These screws cannot be used to secure the TV to KDL 32BX320 32BX321 32BX420 32BX421 ONLY the Wall Mount Brackets 2 4 166 871 01 COVER NECK ML3B KDL 40BX420 40BX421 46BX420 46BX421 ONLY A 2 580 608 01 SCREW PSW M5X16 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 36 KDL 32BX320 KDL 32BX320 KDL 32BX321 KDL 32BX420 KDL 32BX420 KDL 32BX421 KDL 32BX421 KDL 40BX420 KDL 40BX420 KDL 40BX421 KDL 40BX421 Soft Cloth FOR SERIAL RANGES LISTED BELOW 3000001 3800000 5000001 5500000 5000001 5500000 3000001 3800000 5000001 5300000 3000001 3800000 5000001 5300000 3000001 3800000 5000001 5500000 3000001 3800000 5000001 5300000 Remove 4 screws from Table Top Stand Assembly Lift up TV set to detach from Table Top Stand Assembly Gently place the TV set face down onto a soft cloth SECTION 6 DISASSEMBLY PART NUMBER INFORMATION NOTE The components identified by shading and Z mark are critical for safety Replace only with part number specified numero specifie NOTE Les composants identifies per un trame et une marque sont critiques pour la securite Ne les remplacer que par une piece portant le Check the Sony Authorized Servicer Portal at www sony com asp for any additional service related issues for this model REF NO 51 51 51 51 52 52 52 52 PART NO
27. 60 Tuner Only 0 Video 2 No Audio REF 2 3 5 6 7 Dead Set or d ts Only all Inputs Remote Part 1 857 903 61 FOR US CND MODELS A BOARD e e e e e e 1 857 903 51 FOR MX LA MODELS 155 G3 BOARD e A A e 1 474 296 11 156 H BOARD e 1 857 898 21 57 SEE LCD PANEL LCD Panel A A MANUAL A e e Problem POWER POWER TEMP FIGURE APPENDIX A 7 KDL 46BX421 MODELS ONLY KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 A 7 APPENDIX B OPERATING INSTRUCTIONS The Operating Instructions are the documents that are included with the television Sony s BRAVIA TVs now come with an on screen i Manual To learn more about the TVs features access the i Manual using the customers remote control KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 1
28. 6X shutdown the inverter has failed If the inverter is available for replacement replace the inverter If the inverter is not available replace the LCD Panel 7X Blink Temperature Failure A digital thermometer IC located on the main board provides a temperature reading of the chassis and LCD panel If the temperature exceeds a pre determined point the TV will shut down If this problem occurs immediately at turn on the temperature sensing IC has failed and replacing the main board is required If this occurs after the TV has been running for a while check for ventilation issues that could cause the TV to run hotter than normal 27 SECTION 4 TROUBLESHOOTING DIAGNOSTIC CODE DESCRIPTIONS The Diagnotic Table provides an overview of the number of times the Standby LED blinks and the possible location To access the Triage documents for the models listed in this manual login into the Sony Authorized Servicer Portal at www sony com asp Diagnostic Item Number of times Diagnostic Item Description Standby LED blinks Possible Location G13 Power Board for 32 models only G14 Power Board for 40 models only MAIN POWER Main Power Over Voltage Protection G3 Poweri Board or 48 models onl A Board A Board DC ALERT AUD PORT DC Alert G13 Power Board for 32 models only Audio Error Detection G14 Power Board for 40 models only G3 Power Board for 46 models only TTCONERR TCONEXGT 5 LCD P
29. A 3 KDL 32BX421 MODELS ONLY KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 A 3 SS eee Sony KDL40BX420 Technical Summary Sheet Before you make the service call 1 Confirm the symptom from the customer 2 Select that symptom from the chart CHASSIS AZ2UK 3 Bring all the boards listed for that symptom 4 Follow the troubleshooting charts in the technical guides to isolate the board 5 Chart Color Code RED DOT Most likely defective part BLUE TRIANGLE Secondary possible defective part LAST UPDATED 1 18 11 BLACK TEXT Board and Part that may correct the symptom No No Power LED blinking red diagnostics Reference No Green Stationary Video No vid Power LED colored lines or 4604 Only O NIGSO No Audio REF 2 3 5 6 7 Dead Set dots Only all Inputs Remote Part A BOARD e e e e e e 1 857 903 51 155 G14 BOARD e e 1 474 310 11 156 BOARD 1 857 898 21 57 SEE LCD PANEL LCD Panel ang a MANUAL A e e Problem POWER POWER PANEL TEMP FIGURE APPENDIX A 4 KDL 40BX420 MODELS ONLY KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 A 4 Sony KDL40BX421 Technical Summary Sheet Before you make the service call 1 Confirm the symptom from the customer 2 Select that symptom from the chart CHASSIS AZ
30. CL sur un mur il doit tre maintenant en place l aide des 4 orifices de fixation pr sents au couvercle arri re 2 en N appuyez par sur le bord du panneau ou du cadre afin d viter le risque de choc lectrique Ne rayez pas ou n appuyez pas sur le panneau avec des objets pointus Ne laissez pas le module expos des temp ratures lev es ou dans des secteurs haut niveau d humidit pour une p riode prolong e N exposez pas le panneau ACL l ensoleillement direct vitez le contact avec l eau car elle peut causer un court circuit dans le module D connectez l alimentation c a au moment de remplacer le r tro clairage ou le circuit inverseur Un voltage lev se produit dans le circuit inverseur 650Vrms Nettoyez toujours le panneau ACL avec un chiffon doux Faites attention lors de la manipulation des fils ou connecteurs du circuit inverseur Le fait d endommager les films peut causer un court circuit Prot gez le panneau des d charges lectrostatiques afin d viter d endommager le circuit lectronique C MOS Pendant la r paration NE LAISSEZ PAS l alimentation en fonction pendant plus de 1 heure pendant que l cran du t l viseur repose sur un tissu KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 6 SECTION 1 SAFETY AND FEATURES 2 SAFETY CHECK OUT After correcting the original service problem perform the following safety checks before rele
31. HISTORV INFORMATION FOR THE FOLLOWING MANUAL SERVICE TRAINING MANUAL AZ2 UK Chassis ORIGINAL MANUAL ISSUE DATE 1 2011 Segment P 2F Version Date Subject 1 0 1 17 2011 No revisions or updates are applicable at this time 2 0 1 24 2011 Reissue entire manual LCD Digital Color TV SON Y 9 883 851 02 SERVICE TRAINING MANUAL AZ2 UK Chassis Segment P 2F LCD Digital Color TV SON Y MODEL LIST MODEL KDL 32BX320 KDL 32BX320 KDL 32BX321 KDL 32BX420 KDL 32BX420 KDL 32BX421 KDL 32BX421 KDL 40BX420 KDL 40BX420 KDL 40BX421 KDL 40BX421 COMMANDER RM VDO65 RM VDO65 RM VDO65 RM VDO65 RM VDO65 RM VDO65 RM VDO65 RM VDO65 RM VDO65 RM VDO65 RM VDO65 DESTINATION MX LA US CND MX LA MX US CND MX US CND MX LA US CND MX US CND MODEL KDL 46BX420 KDL 46BX420 KDL 46BX421 COMMANDER RM VDO65 RM VDO65 RM YD065 DESTINATION MX LA US CND US CND 9 883 851 02 TABLE CONTENTS Section 1 Safety and 1 Section Chassis 17 Warnings and Cautions English 1 22 nm 17 Safety Relalted Warnings lin ej 3 Overall Circuit DescripliOtt 19 Warnings Cautions French 4 RN 19 PEG G U 7 Power
32. ID from KDL 32BX321 F_SS32 SLCD LTY320HNO2 001 Factory Mode Instructions for updating the software are included KDL 32BX420 with the software package on the Sony Authorized Service Portal KDL 32BX421 W LG32 LGD LC320WXN SCB1 3 Factory Mode use the button to scroll down to select KDL 32BX421 F_CM32 CMI V315H3L01 Panel ID KDL 40BX420 KDL 40BX421 F_SS40 SLCD LTU400HMO2 A01 Mode KDL 46BX420 Input Source KDL 46BX421 F SS46 SLCD LTY460HNO1 A01 Aging Mode ELENA 5 To exit Factory Mode without turning Off the TV press the EDID WP Protection RETURNI button Site Air Channels Site Cable Channels Off Color Temp gt gt ADC Calibration gt gt Factory Reset limited Off Auto Phase Off Factory Reset default Off Svstem 0 12 300D Model Name KDL 40BX420 Serial Number See rear or side of TV Picture Quality PQO 009 Audio Qualitv AQ4 1000 Panel F_SS40 10 Panel Info MT001 0028 000 LT lt gt Set Menu Exit 4 Using the table below press the or Onscreen cursor buttons to select the Panel_ID KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 58 SECTION 7 SERVICE ADJUSTMENTS SS S L ADJUSTING THE COLOR TEMPERATURE The default White Balance data values ae set for optimal viewing The following instructions are for technicians who have been requested to customize calibrations for their customers 1 TV must be ON 2 Press the follow
33. INCLUDES 551 4 210 694 11 BEZEL GW40 1 555 1 857 903 61 A BOARD COMPLETE KDL 4OBX420 40BX421 ONLY KDL 40BX421 FOR US CND ONLY 552 4 163 795 01 PANEL SUPPORT AFTER REPLACING THE MAIN BOARD OR THE LCD PANEL KDL 40BX420 40BX421 ONLY YOU MUST UPDATE THE SOFTWARE TO THE LATEST VERSION 553 NA LCD PANEL 556 1 474 310 11 G14 BOARD COMPLETE FOR ALL LCD PANEL AND TCON BOARD PART NUMBER KDL 40BX420 40BX421 ONLY INFORMATION REFER TO THE LCD PANELS SERVICE MANUAL 554 4 264 318 01 BRACKET SIDE US GW 2 580 640 01 SCREW BVTP2 4X16 2 580 600 01 SCREW PSW 4 8 ABOARD COMPLETE 2 580 592 01 SCREW PSW M3X8 KDL 40BX420 ONLY KDL 4OBX421 FOR MX ONLY AFTER REPLACING THE MAIN BOARD OR THE LCD PANEL YOU MUST UPDATE THE SOFTWARE TO THE LATEST VERSION 47 SECTION 6 DISASSEMBLY PART NUMBER INFORMATION FOR SERIAL RANGES LISTED BELOW KDL 40BX420 3000001 3800000 KDL 40BX420 5000001 5500000 KDL 40BX421 3000001 3800000 KDL 40BX421 5000001 5300000 Remove 4 screws and disconnect 5 connectors from A Board to detach from LCD Panel Release 2 clips and slide out Side Bracket to detach from A Board Remove 5 screws and disconnect 3 connectors from G14 Board Remove 2 screws from MB Bracket to detach from LCD Panel Remove 3 screws from Bottom Frame to detach from LCD Panel Remove 2 screws from LCD Panel to detach from Bezel Slide out 2 Panel Brackets to detach from Bezel Carefully lift up LCD Pane
34. L 40BX420 40BX421 ONLY KDL 46BX420 46BX421 ONLY KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 52 SECTION 6 DISASSEMBLY PART NUMBER INFORMATION m ACCESSORIES AND PACKAGING 3 299 071 05 FLYER SAFETY 4 275 988 11 GUIDE QUICK SET UP ALL MODELS EXCEPT KDL 32BX321 4 275 988 21 GUIDE QUICK SET UP ALL MODELS EXCEPT KDL 32BX321 4 275 988 31 GUIDE QUICK SET UP LL MODELS EXCEPT KDL 46BX421 NUAL INSTRUCTION ALL MODELS EXCEPT KDL 32BX321 4 270 476 21 MANUAL INSTRUCTION ALL MODELS EXCEPT KDL 32BX321 4 270 476 31 MANUAL INSTRUCTION ALL MODELS EXCEPT KDL 46BX421 A 4 270 476 11 gt j 4 215 368 11 SUPPLEMENT STAND INSTALLATION REFER TO SN RANGE LISTED ON PAGE 36 i 4 291 757 11 SUPPLEMENT STAND INSTALLATION 2 580 608 01 SCREW PSW M5X16 SCREWS TO ATTACH TABLE TOP STAND TO LCD TV For product protection and safety reasons Sony strongly recommends that you use the screws provided with the TV CAUTION These screws cannot be used to secure the TV to the Wall Mount Brackets MISCELLANEOUS 4 283 209 01 INSULATION SHEET GW32 G A L KDL 32BX320 32BX321 ONLY REFER TO SN RANGE LISTED ON PAGE 36 4 281 008 01 SHEET INSULATION GW32 B ALL MODELS EXCEPT KDL 32BX320 32BX321 REFER TO SN RANGE LISTED ON PAGE 36 4 290 627 01 SHEET INSULATION GF32 G KDL 32BX320 32BX321 32BX420 32BX421 ONLY 4 290 626 01 SHEET INSULATION GF32
35. MI Video 480i 480p 720p 1080i 1080p 1080 24p Audio Two channel linear PCM 32 44 1 and 48 kHz 16 20 and 24bits Dolby Digital PC Input AUDIO OUT 500 mVrms typical DIGITAL AUDIO OUT PCM Dolby Digital optical signal OPTICAL PC IN D sub 15 pin analog RGB 0 7 V p p 75 ohms positive See the PC Input Signal Reference Chart for PC and HDMI IN in the OI manual PC HDMI IN 1 AUDIO INPUT Stereo mini jack 500 mVrms Typical Impedance 47 kilohms Licensing Information Macintosh is a trademark of Apple Inc registered in the U S and other countries HDMI the HDMI logo and High Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC in the United States and other countries Fergason Patent Properties LLC U S Patent No 5 717 422 U S Patent No 6 816 141 Manufactured under license from Dolby Laboratories Dolby and the double D symbol are trademarks of Dolby Laboratories Blu ray Disc is a trademark BRAVIA andBRAVIA BRAVIA Sync and 4 are trademarks or registered marks of Sony Corporation PlayStation is a registered trademark and PS3 is a trademark of Sony Computer Entertainment Inc IDTV I DOLBY Homi DIGITAL Your BRAVIA TV is ENERGY STAR qualified in the Home mode It meets strict energy efficiency guidelines set by the U S Environmental Protection Agency and 7 Department of Energy EESAN STAR ENERGY STAR is a joi
36. PART NO DESCRIPTION ASSEMBLY INCLUDES REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES 801 1 910 103 39 LVDS CONNECTOR ASSEMBLY 40 51P KDL 4OBX420 40BX421 ONLY 51 SECTION 6 DISASSEMBLY PART NUMBER INFORMATION NOTE The components identified by shading NOTE Les composants identifies per un trame et NOTE The components identified by red outline and a mark contain and Z mark are critical for safety Replace only une marque sont critiques pour la securite confidential information Specific instructions must be adhered to whenever with part number specified Ne les remplacer que par une piece portant le these components are repaired and or replaced numero specifie See Appendix A Encryption Key Components in the back of this manual FOR SERIAL RANGES LISTED BELOW KDL 40BX420 3000001 3800000 KDL 40BX420 5000001 5500000 KDL 40BX421 3000001 3800000 KDL 46BX420 46BX421 ONLY Check the Sony Authorized Servicer Portal at www sony com asp for any additional service related issues for this model KDL 40BX421 5000001 5300000 SWITCH UNIT SWITCH UNIT REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES PART NO DESCRIPTION ASSEMBLY INCLUDES PART NO DESCRIPTION ASSEMBLY INCLUDES 851 1 910 104 59 LVDS CONNECTOR ASSEMBLY 40 901 1 910 103 40 LVDS CONNECTOR ASSEMBLY 46 51P KD
37. R AC IN N 1 13 i AC IN H 2 14 CN6401 CN202 STBY3 3V REG 12V 1 3 AC OFF DET GND 2 4 6 POWER ON AUDIO 12V 5 Ca w 7 DIMMER 8 6 7 BL ERR 9 10 BL ERR TCON 12V 11 BL ON AC FF DET 12 DIMMER TCON ON 13 N C STBY 3 3V 14 TCON 12V N C 15 TCON ON POWER ON 16 G13 32 G14 40 G3 46 FIGURE 5 5 POWER AND CONTROL BLOCK DIAGRAM KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 35 SECTION 6 DISASSEMBLY PART NUMBER INFORMATION TA 5 D A S S E BLY R VAL Components not identified by a part number or The component parts of an assembly are indicated by the tems marked with an asterisk are not stocked since description are not stocked because they are seldom reference numbers in the far right column of the parts list they are seldom required for routine service Expect required for routine service and within the dotted lines of the diagram some delay when ordering these components FOR SERIAL RANGES LISTED BELOW E NOTE The components identified by shading NOTE Les composants identifies per un trame et NOTE The components identified by a red outline and a mark contain KDL 32BX320 6000001 7400000 and Z mark are critical for safety Replace only une marque sont critiques pour la securite confidential information Specific instructions must be adhered to whenever KDL 3
38. S to PSU BRKT L 2 x 16628601 screw PSWMaxio 0 72 FOR SERIAL RANGES LISTED BELOW KDL 32BX320 SERIAL NO RANGE 3000001 3800000 and 5000001 5500000 32BX321 SERIAL NO RANGE 5000001 5500000 KDL 32 BX320 6000001 7400000 EN NIT KDL 32BX321 7100001 7400000 a 2 580 608 01 scREW PSwMexi KDL 32BX420 6000001 7200000 SPKR L 2 SPKR RO TA ENT KDL 32BX421 6000001 7200000 Cr 2 580 640 01 SCREW BVTP24XI RCO SPKR BRKT 1 SPKR BRKT R I 256050501 SCREW PSwMaxig RciePNLTOPONIRO OoOO 2 2 580 600 01__ scREW PSW M4X8 UNDR CVR 1 VESA BRKTS 2 BTM FRM 2 PSU BRKT R 2 PSU BRKT Lto 1 8 2 580 592 01 SCREW PSW M3X8 JABOARD 4 G13 BOARD 4 PSU BRKT L to PNL 1 MB BRKT to PNL 2 o 25050901 SCREW sPSWMaxo NorTHSMODL 0 Ca 4 159 298 01 screw sPSwMaxio JNorivTHSMODEL KDL 32BX420 32BX421 ALL SERIAL NUMBER RANGES PN DESCRIPTION REMARKS TOTAL A 258060801 sCREW PSWM5Xt 7 TABLETOPSTAND4 4 7 685 84779 SCREW BVTP23XI2 SPKRIQ SPKRRQ OO 4 W 7685564879 5 5x12 TYPEZIT 3 RC to TRMNL AREA 1 ROTO SIDE BAR 2580 6401 SCREW BVTP24X 6 RC SPKRBRKTA ISPKRBRKT R Jr 258059501
39. SASSEMBLY PART NUMBER INFORMATION FOR SERIAL RANGES LISTED BELOW KDL 32BX320 KDL 32BX320 KDL 32BX321 KDL 32BX420 KDL 32BX420 KDL 32BX421 SWITCH UNIT 3000001 3800000 5000001 5500000 5000001 5500000 3000001 3800000 5000001 5300000 3000001 3800000 REF NO PART NO DESCRIPTION 751 1 910 104 57 751 1 910 104 58 ASSEMBLY INCLUDES LVDS CONNECTOR ASSEMBLY 32W 51P KDL 32BX320 32BX321 ONLY LVDS CONNECTOR ASSEMBLY 32F 51P KDL 32BX420 32BX421 ONLY REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 NOTE The components identified by shading NOTE Les composants identifies per un trame et NOTE The components identified by red outline and a mark contain and Z mark are critical for safety Replace only une marque Z sont critiques pour la securite confidential information Specific instructions must be adhered to whenever with part number specified Ne les remplacer que par une piece portant le these components are repaired and or replaced numero specifie See Appendix A Encryption Key Components in the back of this manual Check the Sony Authorized Servicer Portal at www sony com asp for any additional service related issues for this model KDL 40BX420 40BX421 ONLY FOR SERIAL RANGES LISTED BELOW KDL 40BX420 6000001 7400000 KDL 40BX421 6000001 7200000 SWITCH UNIT REF NO
40. SIDE US GW KDL 32BX420 32BX421 ONLY 1 857 903 3141 ABOARD COMPLETE 2 580 592 01 SCREW PSW 3 8 KDL 32BX420 ONLY 2 580 599 01 SCREW PSW M4X6 KDL 32BX421 FOR MX ONLY AFTER REPLACING THE MAIN BOARD OR THE LCD PANEL YOU MUST UPDATE THE SOFTWARE TO THE LATEST VERSION KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 45 SECTION 6 DISASSEMBLY PART NUMBER INFORMATION FOR SERIAL RANGES LISTED BELOW KDL 32BX420 3000001 3800000 KDL 32BX420 5000001 5300000 KDL 32BX421 3000001 3800000 KDL 32BX421 5000001 5300000 Remove 4 screws and disconnect 5 connectors from A Board to detach from LCD Panel Release 2 clips and slide out Side Bracket to detach from A Board Remove 4 screws and disconnect 3 connectors from G13 Board Remove 2 screws from MB Bracket to detach from LCD Panel Remove 2 screws from Vesa Brackets to detach from Bottom Frame Remove 2 screws from Bottom Frame to detach from LCD Panel Slide out 2 Panel Brackets to detach from Bezel Carefully lift up LCD Panel to remove from Bezel 00000000 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 NOTE The components identified by shading NOTE Les composants identifies per un trame et NOTE The components identified by red outline and a mark contain and N mark are critical for safety Replace only une marque sont critiques pour la securite confidential information Specific instructions must be a
41. STED BELOW KDL 40BX420 6000001 7400000 KDL 40BX421 6000001 7200000 Remove 4 screws and disconnect 5 connectors from A Board to detach from LCD Panel Release 2 clips and slide out Side Bracket to detach from A Board Remove 5 screws and disconnect 3 connectors from G14 Board Remove 2 screws from MB Bracket to detach from LCD Panel Remove 3 screws from Bottom Frame to detach from LCD Panel Remove 2 screws from LCD Panel to detach from Bezel Slide out 2 Panel Brackets to detach from Bezel Carefully lift up LCD Panel to remove from Bezel 00000000 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 NOTE The components identified by shading NOTE Les composants identifies per un trame et NOTE The components identified by a red outline and a mark contain and N mark are critical for safety Replace only une marque sont critiques pour la securite confidential information Specific instructions must be adhered to whenever with part number specified Ne les remplacer que par une piece portant le these components are repaired and or replaced numero specifie See Appendix A Encryption Key Components in the back of this manual Check the Sony Authorized Servicer Portal at www sony com asp for any additional service related issues for this model Bracket NBottom Frame REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES REF NO PART NO DESCRIPTION ASSEMBLY
42. Supply i e S 19 Self Diagnosis adit ce 9 i 20 ES 10 switeh Unit 20 a dat 10 IA A A 20 T ne 10 Section 4 Troubleshooting cernens 22 E 22 e SA 19 Updating the software 22 5 HD Inputs ses 10 Video T T E e LE 22 NG Ha EE E 22 PER SRE CRM se lu 23 P H Audio Troubleshooting ke e dues 24 Specifications u 12 Power Supply Troubleshooting 25 Section 2 Software Requirements 14 Completely Dead ner anon x 25 OVEPVIEW e 14 TV WON t POWER OE din panni up ARAS DATUM UD UM 25 Software Updates for 14 Backlight ISSUE S ane Un nid sae 25 Software Updates for Servicers 15 No Backlight Mo nub das Eaton 25 Software Update 15 Protection 26 Checking the Software 15 Standby LED Flash Count 26 Examples of Software Correctable Symptoms
43. TT TO 50 KDL 32BX320 32BX321 32BX420 32BX421 Only 50 KDL 40BX420 40BX421 Only 51 KDL 46BX420 46BX421 52 Accessories and 24 2 0202 53 Mis Coll ED 53 Remote Commander 53 Wire Dressing 54 Section 7 Service Adjustments 56 S addo Rata ordonne rene is 56 Updating the software iiie tana adea 56 Accessing Service Adjustment Mode 56 Accessing Factory Adjustment 57 Selecting the Panel ID Code 58 Adjusting the Color Temperature 59 Appendix A Triage A 1 Appendix B Operating Instructions B 1 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 ii SECTION 1 SAFETY AND FEATURES WARNINGS AND CAUTIONS ENGLISH CAUTION These servicing instructions are for use by qualified service personnel only To reduce the risk of electric shock do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so CARRYING THE TV e Disconnect all cables when carrying the TV e Carry the TV with the adequate number of people lar
44. anel G13 Power Board for 32 models only G14 Power Board for 40 models only G3 Power Board for 46 models only A Board FIGURE 4 3 DIAGNOSTIC TABLE NOTE To provide information to customers regarding how to use their TV features or FAQs refer the customer to the Sony esupport webstie at http esupport sony com BACKLITE Backlight Error KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 28 SECTION 4 TROUBLESHOOTING Uff g Af VIEWING THE SELF CHECK DIAGNOSTIC HISTORY It is possible to bring up past occurrences of a failure for confirmation on the Self Check diagnostic history screen This feature is useful for failures which are intermittent or when the customer is not sure what is causing the television to shut down 1 1 TV must be in standby mode Power off 2 Press the following buttons on the Remote Commander within a second of each other DISPLAY Channel 5 Volume NOTE This differs from accessing Service Adjustments Mode Volume SELF CHECK MAIN POWE 001 indicates an error was detected AUD PORT 000 indicates no error was detected DC ALERT 000 BALANCER 000 TCON ERR 000 HFR ERR 000 P ID ERR 000 PANEL POWE 000 000 TEMP ERR 000 00010 00000 Menu Exit Panel Operation Time by Hour max 99999 Boot Count max 99999 Total Operation Time by Hour max 99999 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 29
45. asing the set to the customer 1 Check the area of your repair for unsoldered or poorly soldered connections Check the entire board surface for solder splashes and bridges Check the interboard wiring to ensure that no wires are pinched or touching high wattage resistors Check that all control knobs shields covers ground straps and mounting hardware have been replaced Be absolutely certain that you have replaced all the insulators Look for unauthorized replacement parts particularly transistors that were installed during a previous repair Point them out to the customer and recommend their replacement Look for parts which though functioning show obvious signs of deterioration Point them out to the customer and recommend their replacement Check the line cords for cracks and abrasion Recommend the replacement of any such line cord to the customer Check the antenna terminals metal trim metallized knobs screws and all other exposed metal parts for AC leakage Check leakage as described below KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 7 SECTION 1 SAFETY AND FEATURES To Exposed Metal LEAKAGE TEST Parts on Set The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis must not exceed 0 5 mA 500 microamperes Leakage current can be measured by any one of three methods AC Voltmeter 1 A co
46. ation openings is recommended to ensure to proper ventilation provided on the package KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 49 SECTION 6 DISASSEMBLY PART NUMBER INFORMATION NOTE The components identified by shading NOTE Les composants identifies per untrame et NOTE The components identified by a red outline and a f mark contain and N mark are critical for safety Replace only une marque sont critiques pour la securite confidential information Specific instructions must be adhered to whenever S CR E LE GE N D with part number specified Ne les remplacer que par une piece portant le these components are repaired and or replaced KDL 32BX320 SERIAL NO RANGE 6000001 7400000 32BX321 SERIAL NO RANGE 7100000 7400000 numero specifie See Appendix A Encryption Key Components in the back of this manual PN DESCRIPTION JREMARKS Check the Sony Authorized Servicer Portal at www sony com asp for any additional service related issues for this model TABLE TOP STAND 4 SPKR L 2 SPKR R 2 RC to TRMNL AREA 1 RC to SIDE BRKT 1 TORS RC 9 SPKR BRKT L 1 SPKR BRKT R 1 MB BRKTS to BEZ 2 RC to PNL TOP CNTR 2 o 12580 60001 SCREW PSWMaxs UNDRCVRI KDL 32BX320 32BX321 32BX420 32BX421 ONLY Ce 258059201 SCREW PSWM3xS ABOARD 4 GISBOARD 8 2 580 599 01 sCREW PSW M4X6 VESA BRKTS 2 BTM FRM 2 TOP FRM 2 PSU BRKTS 4 MB BRKT
47. avoid damage If there is any tape securing the cable to the panel near the input temporarily remove the tape to allow free movement of the cable Carefully insert and remove the connector while slightly rocking it Observe the screen as you do this If any activity appears on the screen flashes lines or patterns The TCON is OK The TV may shut down within a 10 to 20 second period because the protect circuits have detected a TCON failure If this happens simply re insert the LVDS connector turn the TV back on and try the procedure again Normally you should be able to detect something on the screen within a matter of seconds Figure 5 2 Video Distortion Flowchart on page 32 should provide assistance in isolating the cause of the video loss KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 This is perhaps the more difficult failure to diagnose lt is difficult when talking to the customer on the phone because an accurate description of the problem must be obtained in order to determine which part or parts to bring to the location It may also be difficult for the technician when the problem is witnessed If the problem is specific to one or more inputs it should be easy to determine if the fault lies on the main board or a device that is plugged into it If the distortion occurs at all inputs it must be analyzed based on what appears on the display and isolated to the main board TCON or LCD panel These compone
48. be assumed to be OK The backlights are also functioning properly Although it is unusual for a backlight failure to cause a complete loss of video the TV will shut down if a backlight power or open LED is detected there have been cases where the backlights have failed to turn on without the unit shutting down 22 SECTION 4 TROUBLESHOOTING 2 22 If the loss of video occurs on all inputs the problem will require VIDEO DISTORTION additional diagnostic work The presence of audio is an important sign to check for Missing audio accompanying a loss of video helps to eliminate the TCON as the cause and would point to the main board as the culprit If audio is present the next step is to determine if the video loss is occurring in the video process circuits on the main board or the LVDS cable link from the main board to the LCD panel Service Tip If a service call is made for a no video complaint a warranty repair would require the technician to bring the main board to the location Install the main board and if the video problem is not resloved it is safe to assume the problem might reside in the TCON If the TCON is not available as a replacement part this issue would require replacing the LCD panel HINT One method to test a TCON which works rather well in most cases is to remove the LVDS connector at the panel connection while the TV is running Be certain to release the lock tabs and handle the connector carefully to
49. curit ainsi que pour viter de causer des dommages g OD ALERTE Afin d eviter tout risque d electrocution provenant d un chassis sous tension un transformateur d isolement doit etre utilis lors de tout d pannage Le ch ssis de ce r cepteur est directement raccord l alimentation du secteur AATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE Les composants identifies par une trame et par une marque Asur les schemas de principe les vues explosees et les listes de pieces sont d une importance critique pour la securite du fonctionnement Ne les remplacer que E des composants Sony dont le numero de piece est indique dans le present manuel ou dans des supplements publies par Sony Les reglages de circuit dont l importance est critique pour la securite du fonctionnement sont identifies dans le present manuel Suivre ces procedures lors de chaque remplacement de composants critiques ou lorsqu un mauvais fonctionnement suspecte KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 4 SECTION 1 SAFETY AND FEATURES NM AVERTISSEMENT N utilisez pas de serviettes en papier tout type de tampons ou chiffons abrasifs ou mat riaux en caoutchouc ou en vinyle pour nettoyer l cran Ces types de mat riaux peuvent facilement rayer l cran entrainant ainsi un dommage permanent N utilisez pas de produit de nettoyage contenant alcalin acide poudre abrasive ou solvant volatil com
50. dhered to whenever with part number specified Ne les remplacer que par une piece portant le these components are repaired and or replaced numero specifie See Appendix A Encryption Key Components in the back of this manual Check the Sony Authorized Servicer Portal at www sony com as for any additional service related issues for this model A Board Bracket Ac N Bottom Frame REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES 501 4 288 557 01 BEZEL GF32 505 1 895 018 31 ABOARD COMPLETE KDL 32BX420 32BX421 ONLY KDL 32BX421 FOR US CND ONLY 502 4 165 056 01 PANEL SUPPORT B AFTER REPLACING THE MAIN BOARD OR THE LCD PANEL KDL 32BX420 32BX421 ONLY YOU MUST UPDATE THE SOFTWARE TO THE LATEST VERSION 503 NA LCD PANEL 506 1 474 297 12 G13 BOARD COMPLETE FOR ALL LCD PANEL AND TCON BOARD PART NUMBER KDL 32BX420 32BX421 ONLY INFORMATION REFER TO THE LCD PANELS SERVICE MANUAL 507 4 266 636 01 BRACKET VESA GW32 504 4 264 318 01 BRACKET SIDE US GW KDL 32BX420 32BX421 ONLY 1 895 018 21 A BOARD COMPLETE 2 580 592 01 SCREW PSW 3 8 KDL 32BX420 ONLY 2 580 599 01 SCREW PSW M4X6 KDL 32BX421 FOR MX ONLY AFTER REPLACING THE MAIN BOARD OR THE LCD PANEL YOU MUST UPDATE THE SOFTWARE TO THE LATEST VERSION 46 SECTION 6 DISASSEMBLY PART NUMBER INFORMATION KDL 40BX420 40BX421 ONLY FOR SERIAL RANGES LI
51. duct containing alkaline acid cleaner scouring powder or volatile solvent such as alcohol ammonia benzene thinner or insecticide Using any of these harsh cleaners may result in permanent damage to the screen G Do Not spray water or detergent directly onto the TV screen If liquid drips into the bottom of the screen it may cause a failure CLEANING THE LCD PANEL CAUTION When cleaning the TV be sure to unplug the power cord to avoid any chance of electric shock Clean the cabinet of the TV with a dry soft cloth Wipe the LCD screen gently with a soft cloth M Stubborn stains may be removed with a cloth slightly moistened with a solution of mild soap and warm water If using a chemically pretreated cloth please follow the instruction provided on the package M Never use strong solvents such as a thinner alcohol or benzine for cleaning M Periodic vacuuming of the ventilation openings is recommended to ensure to proper ventilation KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 2 SECTION 1 SAFETY AND FEATURES SAFETY RELATED WARNINGS USE CAUTION WHEN HANDLING THE LCD PANEL When repairing the LCD panel be sure you are grounded by using a wrist band When installing the LCD panel on a wall the LCD panel must be secured using the 4 mounting holes on the rear cover il D OUR O IS c M MP o 0 Do not press on the panel or frame edge to avoid the risk of electric s
52. e done more than once Any flashes seen on screen FIGURE 5 1 NO VIDEO FLOWCHART KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 31 SECTION 5 FLOW CHARTS AND DIAGRAMS Video Distortion nes move when wide mode S distortion across entire screen Improper of issing colors Vertical lines or bars Any single o isolated vertical lines More than 1 vertical band FIGURE 5 2 VIDEO DISTORTION FLOWCHART KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 32 SECTION 5 FLOW CHARTS AND DIAGRAMS POWER SUPPLY INFORMATION No Power Press power button while l monitoring pin 3 of je ey CN6401 on power pin 3 supply board Does red standby LED on front panel light High 3 3V on pin 2 Is standby LED blinking FIGURE 5 3 POWER SUPPLY FLOWCHART 33 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 SECTION 5 FLOW CHARTS AND DIAGRAMS PROTECTION INFORMATION Protect Shutdown Standby LED Blinking Immediatelv SONY logo appears before shutdown FIGURE 5 4 PROTECTION SHUTDOWN FLOWCHART KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 34 SECTION 5 FLOW CHARTS AND DIAGRAMS CN6402 UNREG24V TO INVERTER DIMME
53. e video is processed throughout the chain of circuits all the way to the panel is important A past article written for the Sony Newsletter described in detail how this process works Figure 5 2 Video Distortion Flowchart on page 32 will assist in isolating which component is causing the distortion AUDIO TROUBLESHOOTING Since all audio signals are input processed and amplified by the main board any issue involving the loss of audio or audio distortions which are present at all inputs would dictate that the issue can be resolved by replacing the main board It is possible that a software update might also resolve the issue but it is very unusual for a software update to affect all sources Once again always check the Sony Authorized Servicer Portal at www sony com asp for any known and or listed issues that are software related Audio problems that are input specific especially the HDMI and digital sources such as the USB input and tuner are more likely to point to the need for a software update and this is especially true if the problem is intermittent 24 SECTION 4 TROUBLESHOOTING POWER SUPPLY TROUBLESHOOTING BACKLIGHT ISSUES Failures in the power supply circuits that prevent the TV from turning on are caused by one of the following scenarios e Complete failure of the standby and main power supplies e Failure of the main supply including the main switching regulator PFC circuit main relay and other componen
54. efective part LAST UPDATED 1 18 11 BLACK TEXT Board and Part that may correct the symptom No Video missing or distorted remote No Power LED blinking red diagnostics Reference No Green Stationary vj 2 No vid Power LED colored lines ideo 2 Tuner Only 9 0 No Audio REF 2 3 5 6 7 Dead Set or dois Only all Inputs Remote Part A BOARD e e e e e e G13 BOARD e e H BOARD e SEE LCD PANEL LCD Panel e e FIGURE APPENDIX A 1 KDL 32BX320 32BX321 MODELS ONLV KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 A 1 Sony KDL32BX420 Technical Triage Summary Sheet Before you make the service call 1 Confirm the symptom from the customer 2 Select that symptom from the chart CHASSIS AZ2UK 3 Bring all the boards listed for that symptom 4 Follow the troubleshooting charts in the technical guides to isolate the board 5 Chart Color Code RED DOT Most likely defective part BLUE TRIANGLE Secondary possible defective part LASTUPDATED 1 18 11 BLACK TEXT Board and Part f that may correct the symptom No No Power LED blinking red diagnostics Reference No Green Stationary Video 2 No vid Power LED coloredlines or 499 Tuner Only SVED No Audio REF 2 3 5 6 7 Dead Set dots Only all Inputs Remote Part A BOARD e
55. ero specifie DESCRIPTION ASSEMBLY INCLUDES REF NO NOTE The components identified by a red outline and a mark contain confidential information Specific instructions must be adhered to whenever these components are repaired and or replaced See Appendix A Encryption Key Components in the back of this manual Check the Sony Authorized Servicer Portal at www sony com asp for any additional service related issues for this model PART NO DESCRIPTION A BOARD COMPLETE KDL 32BX320 32BX321 ONLY AFTER REPLACING THE MAIN BOARD OR THE LCD PANEL YOU MUST UPDATE THE SOFTWARE TO THE LATEST VERSION ASSEMBLY INCLUDES 1 857 903 21 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 351 4270 690 11 BEZEL GW32 355 KDL 32BX320 32BX321 ONLY 352 4 264 319 01 SUPPORT PANEL C GW KDL 32BX320 32BX321 ONLY 353 NA LCD PANEL 356 FOR ALL LCD PANEL AND TCON BOARD PART NUMBER INFORMATION REFER TO THE LCD PANELS SERVICE MANUAL 357 354 4 264 318 01 BRACKET SIDE US GW L e 1 474 297 12 G13 BOARD COMPLETE KDL 32BX320 32BX321 ONLY 4 266 636 01 BRACKET VESA GW32 KDL 32BX320 32BX321 ONLY 2 580 640 01 SCREW BVTP2 4X16 2 580 592 01 SCREW PSW M3X8 2 580 599 01 SCREW PSW M4X6 43 SECTION 6 DISASSEMBLY PART NUMBER INFORMATION FOR SERIAL RANGES LISTED BELOW KDL 32BX320 3000001 3800000 KDL 32BX320 5000001 5500000 KDL 32BX321 5000001 5500000
56. g movies sports and primetime HD television broadcasts via the 16 9 wide screen panel 1366 x 768 ALL EXCEPT KDL 32BX320 32BX321 MODELS FULL HD 1080P RESOLUTION Experience amazing Full HD 1080p picture quality the highest at home resolution Take full advantage of HD sources like a Blu ray Disc Player or PlayStation 3 gaming console via the 16 9 wide screen panel 1920 x 1080 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 11 SECTION 1 SAFETY AND FEATURES SPECIFICATIONS System Television system NTSC American TV standard ATSC 8VSB terrestrial ATSC compliant 8VSB QAM on cable ANSI SCTE 07 2000 Does not include CableCARD functionality Channel coverage Analog terrestrial 2 69 Digital terrestrial 2 69 Analog Cable 1 135 Digital Cable 1 135 Panel system LCD Liquid Crystal Display Panel Speaker output except KDL 22BX321 BX320 Speaker output KDL 22BX321 BX320 only W Input Output jacks CABLE ANTENNA 75 ohm external terminal for RF inputs VIDEO IN 1 2 VIDEO 1 Vp p 75 ohms unbalanced sync negative AUDIO 500 mVrms Typical Impedance 47 kilohms COMPONENT IN YPBPR Component Video Y 1 0 Vp p 75 ohms unbalanced sync negative PB 0 7 Vp p 75 ohmsPR 0 7 Vp p 75 ohms Signal format 480i 480p 720p 1080i 1080p AUDIO 500 mVrms Typical Impedance 47 kilohms HDMI IN HD
57. g the power supply to shut down This is usually caused by a failure of the inverter circuits Unplug the inverter and turn the TV back on If a 6X error is displayed the inverter or LCD panel must be replaced 3X Blink DC Regulator Audio Error The REG 5V and D3 3V source originating on the main board is monitored for low voltage conditions by the CPU A failure causing a 3X shutdown would require replacing the main board 5X Blink TCON Error A communications error with the timing control circuits TCON has occurred If the TCON is available for replacement replace the TCON If the TCON is not available the LCD panel must be replaced since the TCON circuit is part of the LCD panel assembly In rare cases a loose or defective LVDS cable could also be the cause KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 pa i sss 6X Blink Backlight System Failure If the inverter circuits fails to generate high voltage or one or more of the backlight lamps fails to light the television will shut down and display this diagnostics error Observing for the presence of backlighting is crucial in determining which component is likely at fault If the backlights turn on before the 6X shutdown occurs it is safe to assume that the inverter circuits are functioning and one of the lamps failed to ignite Replacing the LCD panel is necessary If the backlights never turn on before the
58. ger size TVs require two or more people e Correct hand placement while carrying the TV is very important for safety and to avoid damage 2 UNE WARNING An isolation transformer should be used during any service to avoid possible shock hazard because of live chassis The chassis of this receiver is directly connected to the AC power line ASAFETV RELATED COMPONENT WARNING Components identified by shading and A mark on the exploded views are critical for safe operation Replace all components with Sony parts whose part numbers appear as shown in this manual or in supplements published by Sony It is essential that all critical parts be replaced only with the part number specified in this manual to prevent electric shock fire or other hazard Circuit adjustments that are critical for safe operation are identified in this manual Follow these procedures whenever critical components are replaced or improper operation is suspected NOTE Do not modify the original design without obtaining written permission from the manufacturer or you will void the original parts and labor guarantee KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 1 SECTION 1 SAFETY AND FEATURES u 2 CAUTION G Do Not use paper towels any type of abrasive pad rags rubber or vinyl materials to clean the screen Using these materials could easily scratch the screen which may result in permanent damage G Do Not use any cleaning pro
59. ges and circuit operations are monitored by the CPU on the main board If a fault is detected the Self Diagnostic function in the TV will force the TV to shut down by the CPU The monitored circuit in which the fault occurred will cause the CPU to flash the Stand By LED in groups of repeating sequences The number of blinks in these groups identifies which voltage or circuit caused the protection event Not all of the available protect codes are used in every model FIGURE LED DISPLAT For example models that are LED backlit do not use the 4 blink balancer error as this circuit is found in models that are backlit with times fluorescent lamps The following list contains the protect circuits m diagnostics codes used in the models listed in this manual Figure 5 times H UUU 5 4 Protection Shutdown Flowchart on page 34 provides guidance in locating the possible component causing the shutdown LED ON0 3sec _p iq 1 LED OFF 0 3 sec_ gt LED OFF 3 sec FIGURE 4 2 BLINK COUNT KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 26 SECTION 4 TROUBLESHOOTING 2X Blink Main Power Error A loss of REG12V from the power supply triggers this protect event This symptom is usually remedied by replacing the power supply board If the error continues after the power supply board is replaced suspect excessive loading which is causin
60. hock Do not scratch or press on the panel with any sharp objects Do not leave the module in high temperatures or in areas of high humidity for an extended period of time Do not expose the LCD panel to direct sunlight Avoid contact with water It may cause a short circuit within the module Disconnect the AC power when replacing the backlight or inverter circuit High voltage occurs at the inverter circuit at 650Vrms Always clean the LCD panel with a soft cloth material Use care when handling the wires or connectors of the inverter circuit Damaging the wires may cause a short Protect the panel from ESD to avoid damaging the electronic circuit C MOS During the repair DO NOT leave the Power On for more than 1 hour while the TV is face down on a cloth KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 3 SECTION 1 SAFETY AND FEATURES WARNINGS AND CAUTIONS FRENCH ATTENTION Ces instructions de service sont l usage du personnel de service qualifi seulement Pour pr venir le risque de choc lectrique ne pas faire l entretien autre que celui contenu dans le Mode d emploi moins que vous soyez qualifi faire ainsi POUR TRANSPORTER LE TELEVISEUR Transportez le t l viseur avec le nombre de personnes appropri un t l viseur de grande taille doit tre transport par au moins deux personnes e Lors du transport du t l viseur l emplacement des mains est tr s important pour votre s
61. ing buttons on the Remote Commander within a second of each other 0 gt HONE 4 Press Q to access Color Temp adjustments 3 Using the button scroll down to select Color Temp KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 59 SECTION 7 SERVICE ADJUSTMENTS 000000 9 To save the changes press the to select Data Backup Mode Color Temperature Back gt gt Cool R Gain 443 G Gain 443 B Gain 443 R Offset 512 G Offset 512 B Offset 512 Recall Data Off Data Backup Off lt gt Set Menu Exit 5 Press the or buttons to select the Color Temp type Cool Neutral Warm1 or Warm2 6 After the correct Color Temperature is selected press the to select the Temperature type that needs to be modified 7 After the correct Temperature type is selected press the to increase the data value or press to decrease the data value 8 Complete the data value adjustments to the remaining temperature items within the selected temperature type NOTE Changes to the data value must be saved within the Temperature type selected before making changes to one of the other Temperature types gt gt gt gt gt gt gt gt gt then press 1 Color Temperature Back Color Temp lt R Gain lt G Gain lt B Gain lt R Offset lt G Offset lt B Offset lt
62. l to remove from Bezel 00000000 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 NOTE The components identified by shading NOTE Les composants identifies per un trame et NOTE The components identified by a red outline and mark contain and Z mark are critical for safety Replace only une marque sont critiques pour la securite confidential information Specific instructions must be adhered to whenever with part number specified Ne les remplacer que par une piece portant le these components are repaired and or replaced numero specifie See Appendix A Encryption Key Components in the back of this manual Check the Sony Authorized Servicer Portal at www sony com as for any additional service related issues for this model A Board Bracket REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES 601 4 288 559 01 BEZEL GF40 1 605 1 895 018 31 A BOARD COMPLETE KDL 40BX420 40BX421 ONLY KDL 40BX421 FOR US CND ONLY 602 4 163 795 01 PANEL SUPPORT A AFTER REPLACING THE MAIN BOARD OR THE LCD PANEL KDL 4OBX420 40BX421 ONLY YOU MUST UPDATE THE SOFTWARE TO THE LATEST VERSION 603 NA LCD PANEL 606 1 474 310 11 614 BOARD COMPLETE FORALL LCD PANEL AND TCON BOARD PART NUMBER KDL 40BX420 40BX421 ONLY INFORMATION REFER TO THE LCD PANELS SERVICE MANUAL 604 4 264 318 01 BRACKET SIDE US GW LI 2 580 640 01 SCREW BVTP2 4 16
63. ls to light the over voltage protection circuit of the inverter is activated The inverter shuts down and the same 6 blink protect event occurs The recommended approach for a 6 blink shutdown is to determine if the backlights are turning on before the shutdown The easiest way to determine this is to watch for the Sony logo to appear on the screen The television will make 2 or 3 attempts to achieve proper lighting of the lamps If the Sony logo appears the backlights are turning on and the problem is likely due to one of the lamps not lighting If the lamps never turn on and no Sony logo appears on the screen the inverter is the likely suspect NO BACKLIGHT NO SHUTDOWN It is possible for a symptom of no backlighting to occur that does not cause the television to go into protective shutdown Dynamic dimming control of the backlights is performed by monitoring information from the TCON circuits This is in the form of data and determines the brightness level of the backlights based on video content If the TCON fails to process the RGB video data or if the dimmer data line fails the backlights will not turn on Audio will be present if the selected input has it available The television will remain on indefinitely with the green Power LED lit In this scenario the LCD panel must be replaced 25 SECTION 4 TROUBLESHOOTING PROTECTION SHUTDOWN STANDBY LED FLASH COUNT Self Diagnosis Supported model Critical volta
64. me de l alcool ou de du benz ne diluant ou un insecticide L usage de ces types de nettoyants peut causer des dommages permanents cran G Ne vaporisez pas d eau ou de d tergent directement sur l cran du t l viseur Si du liquide s ins re dans le bas de l cran cela peut causer une panne NETTOYER L CRAN ACL AVERTISSEMENT Au moment de nettoyer le t l viseur assurez vous de d brancher le cordon d alimentation afin d viter tout risque de choc lectrique Nettoyez le caisson du t l viseur avec un chiffon doux et sec Essuyez l cran ACL doucement avec un chiffon doux Les taches tenaces peuvent tre enlev es avec un chiffon l g rement humect d une solution de savon doux et d eau ti de M Si vous utilisez un chiffon chimique pr trait suivez les directives figurant l emballage M N utilisez jamais de solvants puissants comme un diluant de l alcool ou du benzene pour nettoyer M Nous recommandons de passer l aspirateur de facon p riodique sur les ouvertures de ventilation afin d assurer une ventilation appropri e KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 SECTION 1 SAFETY AND FEATURES 2 TT T TR AVERTISSEMENTS DE S CURIT FAITES ATTENTION LORS DE LA MANIPULATION DE L CRAN ACL Au moment de r parer l cran ACL assurez vous d tre mis la terre l aide d un bracelet cet effet Au moment d installer le panneau A
65. mmercial leakage tester such as the Simpson 229 RCA ME WT 540A Follow the manufacturers instructions to use these instructions 2 Abattery operated AC milliampmeter The Data Precision 245 digital multimeter is suitable for this job 3 Measuring the voltage drop across a resistor by means of a VOM or battery operated AC voltmeter The limit indication is 0 75 V so analog meters must have an accurate low voltage scale The Simpson s 250 and Sanwa SH 63TRD are examples of passive VOMs that are suitable Nearly all batterv operated digital multimeters that have a 2 VAC range are suitable see Figure A Earth Ground Figure A Using an AC voltmeter to check AC leakage HOW TO FIND A GOOD EARTH GROUND A cold water pipe is a guaranteed earth ground the cover plate retaining screw on ol most AC outlet boxes is also at earth ground poer Ohmmeter AC Outlet Box If the retaining screw is to be used as your earth ground verify that it is at ground by measuring the resistance between It and a cold water pipe with an ohmmeter je The reading should be zero ohms E If a cold water pipe is not accessible connect a 60 to 100 watt trouble light not a Cold water Pipe neon lamp between the hot side of the receptacle and the a screw Try both slots if necessary to locate the hot side on the line the lamp should light at normal brilliance if the screw is at ground potential see Figure B Figure B Checking fo
66. nd light sensor KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 20 SECTION 3 CHASSIS OVERVIEW Ku COMPOSITE OR COMPONENT 1 COMPONENT 2 ANALOG AUDIO OUT U3 MT5388 HDMI 1 ANN DECODER OPTICAL AUDIO OUT AN PROCESS u GPU 1C4305 HDMI 3 1 TEMP BX421 MODELS SENSE ONLY LVDS INVERTER PC HD15 USB2 0 LCD PANEL LED SWITCH IR RX UNIT LIGHT SENSOR 24V AC IN POWER SUPPLY ANE G13 32 G14 40 G3 46 FIGURE 3 3 BLOCK DIAGRAM KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 21 SECTION 4 TROUBLESHOOTING ET 2222 OVERVIEW VIDEO FAILURES Most troubleshooting for this chassis focuses on the 3 major components used e The Main Board A e Power Supply e LCD Panel This chapter provides practical troubleshooting procedures based on the various symptoms that will appear when a particular circuit fails to operate properly Typical failure symptoms will be discussed in this chapater with troubleshooting flowcharts for each symptom in the Section 5 Flow Charts and Diagrams on page 31 NOTE Always remember to check the Sony Authorized Servicer Portal at www sony com asp to access the latest technical bulletins along with triage charts to quickly identify the most like part to complete the repair based on the symptom UPDATING THE SOFTWARE As mentioned in Section 2 Software Requirements there are several issues that may be resl
67. nt program of these government agencies designed to promote energy efficient products and practices Changes to certain features settings and functionalities of this TV i e Picture Sound Power Savings can increase or change the power consumption Depending upon such changed settings the power consumption may exceed the limits required for the ENERGY STAR qualification in the Home mode KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 12 SECTION 1 SAFETY AND FEATURES 2 Model name KDL 46BX421 40BX421 32BX421 32BX321 46BX420 40BX420 32BX420 32BX320 Power and others Power requirement 110 240 V AC 50 60 Hz U S A Canada Mexico 120 V AC 60 Hz Power consumption 210W 180 W 115 in use in standby Less than 0 25 W with 120 V AC and with 240 V AC less than 0 35 W a and diagonally 46 40 FE Display resolution 1 920 dots horizontal x 1 080 lines vertical 1 388 dots horizontal x 768 lines vertical Speaker Full range 2 mm 40 x 100 inches 15 5x 4 Dimensions with stand mm 1 120 x 707 x 294 988 x 632 x 250 800 x 528 x 220 inches 44 1 27 7 8 11 5 8 39x 25 x 9 7 8 312 x 20 7 8 x 8 3 4 without stand mm 1 120 x 674 x 97 988 x 600 x 94 800 x 496 x 91 inches 44 1 8 x 26 5 8 x 3 7 8 39x 23 5 8 x 3 3 4 31 2x 19 5 8 x 3 5 8 wall mount hole pattern mm 300 x 300 200 x 200 wall mount screw size mm
68. nts usually cause distortions that are unique to the specific circuit Below is an example of the typical distortions Main Board A Board Since the video signal is processed on a frame by frame basis it is very unlikely that a distortion that is occurring on a specific part of the display panel is originating here Distortion problems originating in the video process circuits tend to affect the entire picture The following are some examples e Improper color reproduction or no color e Improper luminance levels e Lack of detail in the picture Distortions that change with movement in the video Diagonal lines video 23 SECTION 4 TROUBLESHOOTING TCON Since the TCON allocates the RGB video information based on specific timing information the distortions tend to be fixed and usually appears as symmetrical patterns that occupy most or a significant portion of the display The TCON circuits in this chassis are integrated within the LCD panel which requires replacement of the entire panel to remedy a TCON failure Some examples of TCON errors e Novideo e Thin vertical lines spanning most or all of the display e More that one column of wide vertical columns which may appear black or any color or may contain distorted video e Multi colored vertical line patterns with a repetitive pattern Service Tip Whenever vertical lines of distortion appear select an inactive input or disconnect the antenna in the tuner m
69. o 2 580 600 01 SCREW PSW 4 8 1 895 018 21 ABOARD COMPLETE 2 580 592 01 SCREW PSW 3 8 KDL 40BX420 ONLY KDL 40BX421 FOR MX ONLY AFTER REPLACING THE MAIN BOARD OR THE LCD PANEL YOU MUST UPDATE THE SOFTWARE TO THE LATEST VERSION 48 SECTION 6 DISASSEMBLY PART NUMBER INFORMATION NOTE The components identified by shading NOTE Les composants identifies per untrame et NOTE The components identified by a red outline and a f mark contain KD L 46 B X 42 0 4 6 B X 421 LY and N mark are critical for safety Replace only une marque sont critiques pour la securite confidential information Specific instructions must be adhered to whenever with part number specified Ne les remplacer que par une piece portant le these components are repaired and or replaced Remove 4 screws and disconnect 5 connectors from A Board to detach from LCD Panel numero specifie See Appendix A Encryption Key Components in the back of this manual Release 2 clips and slide out Side Bracket to detach from A Board Check the Sony Authorized Servicer Portal at www sony com as for any additional service related issues for this model Remove 5 screws and disconnect 3 connectors from G3 Board Remove 2 screws from MB Bracket to detach from LCD Panel Remove 2 screws from Bottom Frame to detach from LCD Panel Remove 3 screws from LCD Panel to detach from Bezel Slide out 2 Panel Brackets to detach from Bezel Carefully lif
70. ode The idea is to not have a high definition signal as the source This allows the picture zoom functions to operate Change the zoom mode from the remote commander If the lines follow the normal and zoom modes the problem resides on the main board If the lines remain fixed throughout the various zoom modes the TCON is at fault LCD Panel Distortions originating from the LCD panel tend to be localized with the exception of horizontal line issues A failure of a gate driver can cause a horizontal distortion with all video content below that point appearing distorted Depending on which gate driver has failed the distortion may only cover a small area of the bottom of the screen if the driver failed near the bottom of the panel or a large area of the screen if the driver failed near the top of the panel With the exception of visible physical damage the following are some examples of LCD panel related distortions KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 95 0 e Any single thin vertical line regardless of color e Any thin vertical lines isolated to a specific area of the screen e A singe vertical column of lines of any color or containing distorted video e Any fixed horizontal lines e Blotches of black or improperly colored areas e Ghosting of images in which the entire image is repeated or more times A thorough understanding of how th
71. ondary possible defective part LASTUPDATED 1 18 11 BLACK TEXT Board and Part that may correct the symptom No No Power LED blinking red diagnostics Reference No Green Stationary Video 2 No vid Power LED coloredlines or 4604 Only 90 No Audio REF 2 3 5 6 7 Dead Set dots Only all Inputs Remote Part A BOARD e e e e e e a 1 857 903 51 155 G3 BOARD e mi 1 474 296 11 156 BOARD e 1 857 898 21 57 SEE LCD PANEL LCD Panel ang MANUAL A e Problem POWER POWER PANEL TEMP FIGURE APPENDIX A 6 KDL 46BX420 MODELS ONLY KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 A 6 Sony KDL46BX421 Technical Summary Sheet Before you make the service call Confirm the symptom from the customer 1 2 Select that symptom from the chart CHASSIS AZ2UK 3 Bring all the boards listed for that symptom 4 Follow the troubleshooting charts in the technical guides to isolate the board 5 Chart Color Code RED DOT Most likely defective part BLUE TRIANGLE Secondary possible defective part LAST UPDATED 1 18 11 BLACK TEXT Board and Part that may correct the symptom Power LED No blinking red diagnostics Power Video missing or distorted Remote Reference No Green Stationary Video 2 No vid N Power LED colored lines 10
72. oved by updating the software to the latest version For a list of possible correctable issues see Checking the Software Version on page 16 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 Problems that develop in the video circuits can appear as subtle or major distortions a loss of one or more colors improper video level or a complete loss of video When troubleshooting LCD display devices the problem must be isolated to 2 major components The main board where the video processing is performed or the LCD panel In some cases the TCON may not be available as a separate component and replacement of the LCD panel is required to rectify a TCON problem Distortion in the video signal that affects all inputs can be challenging at times since any of the above mentioned components can be the cause Fortunately each of these components tends to generate unique symptoms when a problem occurs Some distortions may occur that could be caused by either of these components but a good understanding of the circuits and further investigation will isolate the suspected circuit The following sections will cover the various scenarios of problems that may occur in the video processing circuits NO VIDEO A video complaint can be caused by a number of reasons The first step is to determine if the condition is present from all input sources If any video source is working properly the TCON located within the LCD panel can
73. r earth ground KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 8 SECTION 1 SAFETY AND FEATURES SELF DIAGNOSIS FUNCTION The TVs in this manual contain a self diagnostic function If an error occurs the STANDBY LED will automatically begin to flash The number of times the LED flashes translates to a probable source of the problem A definition of the STANDBY LED flash indicator is listed in the Operating Instruction manual for the user s reference If an error symptom cannot be reproduced the remote commander can be used to review the failure occurrence data stored in memory to reveal past problems and how often these problems occur For complete information refer to Section 4 Troubleshooting on page 22 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 9 SECTION 1 SAFETY AND FEATURES sss OVERVIEW FEATURES The AZ2 UK chassis is one of several designs for the 2011 model line Several new features are introduced in this chassis model lineup of Sony Bravia LCD televisions This manual covers the following along with some carryovers from the previous year models KDL32BX321 Easilv manage vour settings for the best HDTV experience with Scene Select Choose from five different packages each with preconfigured KDL32BX420 picture and audio settings including Sports Photo Game Cinema KDL32BX421 neues KDL40BX420 USB INPUT KDL40BX421 Share your photos on the big screen or listen
74. t LCD Panel to remove from Bezel 00000000 E A Board Bracket REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES 651 4 210 696 11 BEZEL GW46 KDL 46BX420 46BX421 ONLY 652 4 163 795 01 PANEL SUPPORT A AFTER REPLACING THE MAIN BOARD OR THE LCD PANEL KDL 46BX420 46BX421 ONLY YOU MUST UPDATE THE SOFTWARE TO THE LATEST VERSION CLEANING THE LCD PANEL CAUTION When cleaning the TV be sure to unplug the power cord to avoid any chance of electric shock 653 NA LCD PANEL 656 1 474 296 11 G3 BOARD COMPLETE l FOR ALL LCD PANEL AND TCON BOARD PART NUMBER KDL 46BX420 46BX421 ONLY Clean the cabinet of the TV with a drv soft cloth INFORMATION REFER TO THE LCD PANELS SERVICE MANUAL Wipe the LCD screen gently with a soft cloth 654 4 264 318 01 BRACKET SIDE US GW L 2 580 640 01 SCREW BVTP2 4X16 Stubborn stains be removed with a cloth slightly moistened with a solution of mild soap and e 2 580 592 01 SCREW PSW M3X8 655 1 857 90351 A BOARD COMPLETE 4459 29 01 SCREW PSW M4X10 Wenn water l KDL 46BX421 FOR MX ONLY using a chemically pretreated cloth please follow the instruction provided on the package AFTER REPLACING THE MAIN BOARD OR THE LCD PANEL Never use strong solvents such as a thinner alcohol or benzine for cleaning YOU MUST UPDATE THE SOFTWARE TO THE LATEST VERSION l Periodic vacuuming of the ventil
75. t NOTE The components identified by a red outline and mark contain and Z mark are critical for safety Replace only une marque sont critiques pour la securite confidential information Specific instructions must be adhered to whenever with part number specified KDL 40BX420 40BX421 ONLY Ne les remplacer que par une piece portant le these components are repaired and or replaced numero specifie See Appendix A Encryption Key Components in the back of this manual FOR SERIAL RANGES LISTED BELOW _ Check the Sony Authorized Servicer Portal at www sony com asp for any additional service related issues for this model KDL 40BX420 6000001 7400000 KDL 40BX421 6000001 7200000 Remove 7 screws from Rear Cover Remove 1 screw from Side Bracket position Remove 1 screw from Terminal Area position Remove 4 screws from Rear Cover Gently lift up Rear Cover from bottom side to detach from Bezel Lift up AC Power Cord and disconnect 1 connector from G14 Board to detach from Under Cover Remove 1 screw from Under Cover Remove 1 screw from Left Speaker Bracket to detach from Bezel Remove 2 screws from Speaker to detach from Left Speaker Bracket Release clips and disconnect 1 connector to detach H Board from LED Guide 9 Remove 1 screw from Right Speaker Brackets to detach from Bezel D Remove 2 screws from Speaker to detach from Right Speaker Bracket Lift up Switch Unit and disconnect 1 connec
76. tach from Bezel REF NO 151 151 152 153 154 KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 See Appendix A Encryption Key Components the back of this manual Check the Sony Authorized Servicer Portal at www sony com asp for any additional service related issues for this model PART NO 4 288 558 11 4 288 558 01 4 266 658 01 1 838 980 11 4 264 311 01 DESCRIPTION REAR COVER GF32 KDL 32BX320 32BX321 32BX420 ONLY KDL 32BX421 FOR MX ONLY REAR COVER GF32 KDL 32BX421 FOR USICND ONLY BRACKET VESA M6 GW 151 ASSEMBLY INCLUDES POWER SUPPLY CORD WITH CORE KDL 32BX320 32BX321 32BX420 32BX421 ONLY COVER UNDER GW26 KDL 32BX320 32BX321 32BX420 32BX421 ONLY REF NO 155 156 PART NO 4 264 313 01 4 264 312 01 1 858 572 11 1 895 019 11 1 489 627 11 7 685 647 79 7 685 648 79 2 580 640 01 2 580 595 01 2 580 600 01 DESCRIPTION BRACKET SP GW32L KDL 32BX320 32BX321 32BX420 32BX421 ONLY BRACKET SP GW32R KDL 32BX320 32BX321 32BX420 32BX421 ONLY ASSEMBLY INCLUDES LOUDSPEAKER 4 0X10 0CM H BOARD MOUNTED SWITCH UNIT SCREW BVTP2 3X12 SCREW BVTP 3 12 IT 3 SCREW BVTP2 4X16 SCREW PSW M3X12 SCREW PSW 4 8 39 SECTION 6 DISASSEMBLY PART NUMBER INFORMATION j D NOTE The components identified by shading NOTE Les composants identifies per un tramee
77. th these varying devices requires that the e Software update for servicers television be compatible with varying communications protocols These updates are specifically for servicers to use during a Although standards are detailed for each of these protocols the real service call and are only available on the Sony Authorized world dictates that occasional errors may occur that could prevent Servicer Portal at http www sonv com asp devices from operating or communicating properly Keeping the software in the television up to date is a procedure that is normally handled by the owner of the television Most customers who own computers and other digital devices are familiar with and are accustomed to updating the software in their products If a customer contacts the Sony Customer Support Center and it is deemed to be correctable with a software update the issue is handled at the customer level Software updates can be performed by e Customer Manual Downloads Software updates can be accessed by the customer from the Sony Support Site at http esupport sonv com where they be downloaded and placed on a USB thumb drive to be loaded onto the TV The instructions for downloading the software file vary from chassis to chassis and sometimes from model to model The customer is provided with the instructions to properly format the USB thumb drive unzip the file and the procedures for loading the software into the television KDL 32BX320 3
78. tion refer to Wire Dressing on page 54 SWITCH UNIT FIGURE 3 1 CIRCUIT BOARD LOCATION FOR KDL 32BX320 32BX321 32BX420 32BX421 ONLY KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 17 SECTION 3 CHASSIS OVERVIEW S we E G14 40 MODELS ONLY E PNG um G3 46 MODELS ONLY ON SS SWITCH UNIT an FIGURE 3 2 CIRCUIT BOARD LOCATION FOR KDL 40BX420 40BX421 46BX420 46BX421 ONLY KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 18 SECTION 3 CHASSIS OVERVIEW OVERALL CIRCUIT DESCRIPTION digitally Digital audio from the tuner and HDMI sources is also input Figure 3 3 Block Diagram on page 21 provides an overview of the AZ2 UK chassis Below is a description of the components and their functions A BOARD Common to all models utilizing the AZ2 UK chassis the A board contains most of the video processing circuitry along with all audio processing Control of the television is accomplished via a CPU embedded within the MT5388 processor Below is a list of the key components located on the A board TUNER The tuner is a combination ATSC NTSC unit It can receive traditional analog NTSC signals via cable or terrestrial along with ATSC digital signals via terrestrial 8VSB or cable 64 or 256 QAM MT5388 PROCESSOR U3 performs the majority of the necessary audio and video processing on the A board Analog
79. tor to detach from Bezel 6000 000000 REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES 201 4 210 695 11 REAR COVER GW40 205 4 264 316 01 BRACKET SP GW40L KDL 40BX420 ONLY KDL 40BX420 40BX421 ONLY KDL 40BX421 FOR MX ONLY 206 4 264 315 01 BRACKET SP GW40R 201 4 210 695 01 REAR COVER GW40 KDL 40BX420 40BX421 ONLY KDL 40BX421 FOR US CND ONLY 202 4 266 658 01 BRACKET VESA M6 GW 201 207 1 858 572 11 LOUDSPEAKER 4 0X10 0CM 208 1 857 898 21 H BOARD MOUNTED 203 1 838 981 11 POWER SUPPLY CORD WITH CORE 209 1 489 627 11 SWITCH UNIT KDL 40BX420 40BX421 ONLY 204 4 264 314 01 COVER UNDER GW37 KDL 4OBX420 40BX421 ONLY 7 685 647 79 SCREW BVTP2 3X12 7 685 648 79 SCREW BVTP 3 12 TYPE2 IT 3 2 580 640 01 SCREW BVTP2 4X16 4 159 298 01 SCREW PSW 4 10 oO D KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 40 FOR SERIAL RANGES LISTED BELOW KDL 40BX420 KDL 40BX420 3000001 3800000 5000001 5500000 KDL 40BX421 3000001 3800000 KDL 40BX421 5000001 5300000 Remove 7 screws from Rear Cover B Remove 1 screw from Side Bracket position Remove 1 screw from Terminal Area position D Remove 4 screws from Rear Cover Gently lift up Rear Cover from bottom side to detach from Bezel D Lift up AC Power Cord and disconnect 1 connector from G14 Board to detach from Under Cover Remove 1
80. ts required to turn the circuits on e The power supply is not receiving a turn on command from the CPU COMPLETELY DEAD SET A complete power supply failure is generally the result of severe transients in the AC line such as those incurred during an electrical storm This model line utilizes a red standby LED located on the lower left front bezel that is lit whenever the TV is receiving AC power and is turned off If it is not lit and AC power to the television is confirmed replacement of the power supply board should rectify the problem TV WON T POWER This situation assumes that the red standby LED is lit when AC power is applied to the TV A lit standby LED indicates that the standby power supply is operational and the CPU on the main board is at least partly operational In this case it is likely that the main power supply is either not being turned on or it has failed Use the power on button on the right side of the TV to attempt a turn on and eliminate a defective remote control system Figure 5 3 Power Supply Flowchart on page 33 will assist in isolating the power problem KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 Under normal circumstances any failures in the backlighting system will cause the unit to shut down If any section of the inverter circuits fails to operate properly the unit will shut down and blink the standby LED in groups of 6 If one or more of the fluorescent backlights fai
81. vice related issues for this model PSU Bracket MB Bracket PSU Bracket Bottom Frame REF NO PART NO DESCRIPTION 401 4 288 557 01 BEZEL GF32 Q 405 1 895 018 11 A BOARD COMPLETE KDL 32BX320 32BX321 ONLY KDL 32BX320 32BX321 ONLY 402 4 264 319 01 SUPPORT PANEL C GW AFTER REPLACING THE MAIN BOARD OR THE LCD PANEL KDL 32BX320 32BX321 ONLY YOU MUST UPDATE THE SOFTWARE TO THE LATEST VERSION ASSEMBLY INCLUDES REF NO PART NO DESCRIPTION ASSEMBLY INCLUDES 403 NA LCD PANEL 406 1 474 297 12 613 BOARD COMPLETE FORALL LCD PANEL AND TCON BOARD PART NUMBER KDL 32BX320 32BX321 ONLY INFORMATION REFER TO THE LCD PANELS SERVICE MANUAL 407 4 266 636 01 BRACKET VESA GW32 404 4 264 318 01 BRACKET SIDE US GW KDL 32BX320 32BX321 ONLY 2 580 600 01 SCREW PSW 4 8 2 580 592 01 SCREW PSW M3X8 44 SECTION 6 DISASSEMBLY PART NUMBER INFORMATION NOTE The components identified by shading NOTE Les composants identifies per untrame et NOTE The components identified by a red outline and a f mark contain KD L 3 2 B X 42 0 I3 2 B X 4 2 1 O N LY and N mark are critical for safety Replace only une marque sont critiques pour la securite confidential information Specific instructions must be adhered to whenever with part number specified Ne les remplacer que par une piece portant le these components are repaired and or replaced numero specifie
82. y Authorized Service Portal website KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 ACCESSING SERVICE ADJUSTMENT MODE This set does not use Service Mode for adjustments To make adjustments refer to Accessing Factory Adjustment Mode on page 57 However you can access the Self diagnosis history page from Service Mode 1 TV must be in Standby mode Power On 2 Press the following buttons on the Remote Commander within a second of each other DISPLAY m Channel map Volume gt POWER POWER DISPLAY Onscreen cursor and select button 5 VOLUME RM YD065 56 SECTION 7 SERVICE ADJUSTMENTS ACCESSING FACTORY ADJUSTMENT MODE For these models adjusment data is changed in Factory Mode 1 TV must be ON 2 Press the following buttons on the Remote Commander within a second of each other gt gt gt gt VOTING gt HONE 3 access the Self Diagnosis history page press until Self diagnosis history is highlighted and then press 4 To exit service mode turn the power off KDL 32BX320 32BX321 32BX420 32BX421 40BX420 40BX421 46BX420 46BX421 57 SECTION 7 SERVICE ADJUSTMENTS SELECTING THE PANEL ID CODE After replacing the main Board or the LCD Panel you must update KDL 32BX320 TAN the software to the latest version and then select the Panel

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