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Training Manual
KDL32EX308
AZ1L Direct-View LCD Television Chassis
Circuit Description and Troubleshooting Guide
MODELS: KDL22EX308
KDL32EX308
Course : CTV-68
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Table of Contents Chapter 1 – Introduction ..................................................... 1 Power Supply ....................................................................... 4 KDL22EX308 .......................................................................... 4 Overview .......................................................................... 1 KDL32EX308 .......................................................................... 4 Features ...........................................
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Table of Contents (Continued) Introduction .................................................................... 24 LCD Panel Basics .............................................................. 24 Gate Drivers ....................................................................... 27 Source Drivers ................................................................... 27 Diagnosing a Failed TCON ............................................ 27 TCON Failures .........................................
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Chapter 1 – Introduction Wireless Internet Ready Overview An optional wireless network adapter is available to connect the television The AZ1L chassis is one of several designs for the 2010 model line of Sony to a home network. These models have an Ethernet port on the rear for Bravia® LCD televisions. Several models will be released incorporating direct connection to the home network. Plugging the optional wireless this chassis. This training manual will cover the EX308 series consisting
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Chapter 1 - Introdcution USB2.0 Side Input Bravia® Sync This feature was available in selected 2008 models and allowed the By utilizing the CEC feature of HDMI 1.3, this feature allows the customer viewing of JPEG formatted pictures and playback of MP3 audio files. The to easily control the various Sony devices within their home entertainment media content has been expanded this year to allow playback of MPEG1 system provided that all of the other devices have this feature included. and MPEG2 f
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Chapter 2 – Overall Circuit Descriptions Digital Audio and Video Decoder: The MPEG2 and Digital Dolby audio Overview streams are received from the tuner for decompression. All video sources The primary circuits contained in the AZ1L chassis consists of a main which are not native 1280 X 720p 60HZ are scaled to this resolution. Digital circuit board (designated as the BAL board), power supply (GD1 Or audio content is output to IC4200 for processing and amplification. G2LE) which varies based
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Chapter 2 - Overall Circuit Description Power Supply Inverter The inverter receives the unreg24V from the G2LE board and generates KDL22EX308 the required high voltage AC to power the backlight lamps. As of the writing of this manual, the inverter is not available as a replacement part. The KDL22EX308 utilizes the GD1 power supply board. There are 3 The LCD panel assembly must be replaced. distinct sections on the power supply: Standby Supply: Continuously operational as long as AC power is
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Chapter 2 - Overall Circuit Description L RF TUNER IC4200 AUDIO SW R D/A AMP COMPOSITE OR ANALOG COMPONENT 1 AUDIO IN ANALOG AUDIO OUT COMPONENT 2 DIGITAL AUDIO COMPOSITE 3 DIGITAL OPTICAL AUDIO OUT TUNER IN ANALOG VIDEO IN IC5000 HDMI 1 SUB- IC9000 IC2200 MICRO A/V HDMI 2 HDMI DECODER SWITCH HDMI 3 VIDEO EQ PROCESS HDMI 4 LVDS PC HD15 EITHERNET LCD PANEL USB2.0 BAL LED SWITCH IR RX UNIT RGB SENSOR CCFL HV POWER SUPPLY INVERTER HLR AC IN GD1 FIGURE 2-1 22EX308 OVERALL BLOCK DIAGRAM CTV-68
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Chapter 2 - Overall Circuit Description L RF TUNER IC4200 AUDIO SW R D/A AMP COMPOSITE OR ANALOG COMPONENT 1 AUDIO IN ANALOG AUDIO OUT COMPONENT 2 DIGITAL AUDIO COMPOSITE 3 DIGITAL OPTICAL AUDIO OUT TUNER IN ANALOG VIDEO IN IC5000 HDMI 1 SUB- IC9000 MICRO IC2200 A/V HDMI 2 HDMI DECODER HDMI 3 SWITCH VIDEO EQ PROCESS HDMI 4 LVDS INVERTER PC HD15 EITHERNET LCD PANEL USB2.0 BAL LED SWITCH IR RX UNIT RGB SENSOR B+/CONTROL POWER SUPPLY HLR AC IN G2LE FIGURE 2-2 32EX308 OVERALL BLOCK DIAGRAM CTV
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Chapter 3 – Troubleshooting Keeping the software in the television up-to-date is a procedure that is Introduction normally handled by the owner of the television. Most customers who own Most troubleshooting of this chassis focuses on the 3 major components computers and other digital devices are familiar with and are accustomed used: to updating the firmware and software in their products. If a customer contacts the Sony Customer Support Center and it is deemed to be • The Main Board (BAL)
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Chapter 3 - Troubleshooting Software Update Responsibility Checking the Software Version Software updates are designed to be performed by the customer. Warranty The easiest way to check the version of software is to use the customer repairs in which the issue can be resolved by a software update are not menu. Engage the XMB graphics by pressing “HOME” on the remote reimbursable. Most issues involving software updates are handled by commander. Scroll left on the graphics icons until the end is
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Chapter 3 - Troubleshooting Special Software Instructions for BAL Board or LCD Panel Replacement The 2010 models utilize a “generic” type BAL 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 BAL boards will now be stocked with basic software. Once the replacement board is install
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Chapter 3 - Troubleshooting Service Tip: If a service call is made for a “no video” complaint, a warranty Video Failures repair would require the technician to bring a BAL board to the location. Problems that develop in the video circuits can appear as subtle or The technician will install the board (hopefully the correct one) and if the major distortions, a loss of one or more colors, improper video level, or video problem is not remedied, it is safe to assume the problem might a complete
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Chapter 3 - Troubleshooting Video Distortion No Video This is, perhaps, the more difficult failure to diagnose. It 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. No Backlights TCON If the problem is specific to one or more inputs it should be easy to turned on? (LCD Panel) determin
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Chapter 3 - Troubleshooting TCON: Since the TCON allocates the RGB video information based on LCD Panel: Distortions originating from the LCD panel tend to be specific timing information, the distortions tend to be fixed and usually localized with the exception of horizontal line issues. A failure of a gate appear as symmetrical patterns that occupy most (or a significant portion) driver can cause a horizontal distortion with all video content below that of the display. Some examples of TCON err
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Chapter 3 - Troubleshooting Video Distortion Lines move Is distortion No Yes Yes Yes Improper of Vertical lines when wide- across entire BAL Board missing colors? or bars ? mode screen? changed ? No Yes No No TCON BAL Board (LCD Panel) TCON (LCD Panel) Yes Any horizontal LCD Panel lines? No Any single or Yes isolated vertical LCD Panel lines? No Yes More than 1 TCON vertical band? (LCD Panel) FIGURE 3-3 VIDEO DISTORTION TROUBLESHOOTING FLOWCHART CTV-68 13
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Chapter 3 - Troubleshooting Won’t Power On Audio Troubleshooting This situation assumes that the red standby LED is lit when AC power Since all audio signals are input, processed and amplified by the BAL is applied to the unit. A lit standby LED indicates that the standby power board, any issue involving the loss of audio or audio distortions which is supply is operational, and the CPU on the BAL board is at least partly present at all inputs would dictate that issue is remedied by replaceme
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Chapter 3 - Troubleshooting No Power Press power Does red standby button while GE3 board (32, 40") Yes Yes High (3.3V) LED on front panel monitoring pin 3 of GE2B board (46/52") on pin 3? light? CN6150 on power GE2A (60") supply board No No Yes Is standby LED See protection BAL Board blinking? flowchart No Is Eco switch Yes on side of unit turned Turn switch on off? (46/52/60") No GE3 board (32, 40") GE2B board (46/52") GE2A (60") FIGURE 3-4 NO POWER TROUBLESHOOTING FLOWCHART CTV-68 15
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Chapter 3 - Troubleshooting 6X: If the inverter circuits fail to generate high voltage or one or more of Protection Shutdown the backlight lamps fails to light, the television will shut down and display Critical voltages and circuit operations are monitored by the CPU on the this diagnostics error. BAL board. If a fault is detected the unit will be forced to shut down by the CPU. The monitored circuit in which the fault occurred will cause the CPU to flash the standby LED in groups of repeat
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Chapter 3 - Troubleshooting Protect Shutdown. Standby LED Yes Does standby LCD Panel Blinking LED light? No Yes 2X GD1 board (22") G2LE board (32") No Yes 3X BAL Board Check room After a While No temperature and 6X 7X ventilation around unit No Yes Immediately No 5X BAL Board Yes “SONY” logo No GD1 board (22") appears before LCD Panel G2LE board (32") shutdown? Yes LCD Panel FIGURE 3-5 PROTECT SHUTDOWN TROUBLESHOOTING FLOWCHART CTV-68 17
