Document Text Contents
Page 1
AZ1FK Direct-View LCD Television Chassis
Circuit Description and Troubleshooting Guide
Training Manual
MODELS: KDL22BX300
KDL32BX300
Course : CTV-67
KDL32BX300
Page 2
CTV-63 i
Software Updates ............................................................ 7
Software Update Responsibility ........................................... 8
Examples of Software Correctable Symptoms .................... 8
Checking the Software Version ............................................ 8
No Video .............................................................................. 9
Audio Troubleshooting ................................................... 12
Power Supply Troubleshooting ...................................... 12
Completely Dead Set ............................................................ 12
Won’t Power On .................................................................... 12
Protection Shutdown ..................................................... 13
Backlight Issues ............................................................. 13
No Backlight, No Shutdown ............................................... 15
Diagnostics History ........................................................ 15
TCON Troubleshooting .................................................. 20
Introduction .................................................................... 20
LCD Panel Basics .............................................................. 20
Gate Drivers ....................................................................... 23
Source Drivers ................................................................... 23
Diagnosing a Failed TCON ............................................ 23
TCON Failures ................................................................... 25
Troubleshooting a “DEAD” TCON ......................................... 25
Examples of Actual TCON Failures ................................... 27
LCD Panel Failures ............................................................ 29
Overview .......................................................................... 1
Features .......................................................................... 1
720p Panel ........................................................................... 1
CCFL Backlighting ............................................................... 1
USB2.0 Input ....................................................................... 1
HDMI 1.3 .............................................................................. 1
Consumer Electronics Control (CEC) ..................................... 1
xvYCC ..................................................................................... 1
Deep Color .............................................................................. 1
Bravia® Sync ....................................................................... 2
Advanced Contrast Enhancer (ACE) ................................... 2
Overview .......................................................................... 3
Overall Circuit Description ............................................... 3
A Board ................................................................................ 3
Tuner ....................................................................................... 3
MT5388 Processor .................................................................. 3
Power Supply ....................................................................... 4
KDL22BX300 .......................................................................... 4
KDL32BX300 .......................................................................... 4
Inverter ................................................................................. 4
Switch Unit ........................................................................... 4
H Board ................................................................................ 4
Introduction ...................................................................... 7
Page 17
Chapter 3 - Troubleshooting
Page 18
Chapter 3 - Troubleshooting
CTV-67 16
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. The LCD panel must be replaced.
Diagnostics History
Figure 3-6 illustrates an example of the diagnostics history page. Entry to
this page is achieved while the television is powered down and pressing
the following buttons on the remote commander: “DISPLAY”, “5”, “VOL –“,
“POWER”.
This feature is useful for failures which are intermittent or when the customer
is not sure what is causing the television to shut down sometimes. Once a
corrective action is determined the error events should be cleared to zero.
This is accomplished by pressing the “8” key followed by the “0” key on
the remote commander.
Test Points
The drawing in Figure 3-7 contains the board-to-board connector and pin
information to identify voltages, signal and control lines for troubleshooting
purposes for the KDL22BX300. Figure 3-8 applies to the KDL32BX300.
All critical voltages and control signals are easily accessed at the power
supply board. Use this drawing in conjunction with the previously discussed
troubleshooting techniques and flowcharts for testing operating voltages
and control signals.
Circuit Board and Connector Locations
Figure 3-9 illustrates the rear of a KDL22BX300 with the rear cover
removed. The location of the major circuit boards and connectors for
voltage checks is provided. Use this illustration to properly dress wires
and harnesses when replacing components. Figure 3-10 provides a
similar view of the KDL32BX300.
ERROR BLINK COUNT EVENT COUNT
OPERATING
HOURS
FIGURE 3-6
DIAGNOSTICS HISTORY PAGE
Page 33
Chapter 4 - Appendix
CTV-67 31
SOURCE TAB BOND FAILURE
MULTIPLE PIXEL FAILURE
GATE TAB BOND FAILURE
GATE TAB BOND FAILURE
Page 34
and i.Link are trademarks of Sony Electronics
2007 Sony Electornics, Inc.
SEL Service Company
16530 Vill Esprillo
National Training Dept. MZ3215
San Diego, CA 92127
Reproduction in whole or part without written permission is prohibited. All rights reserved
CTV67030110
AZ1FK Direct-View LCD Television Chassis
Circuit Description and Troubleshooting Guide
Training Manual
MODELS: KDL22BX300
KDL32BX300
Course : CTV-67
KDL32BX300
Page 2
CTV-63 i
Software Updates ............................................................ 7
Software Update Responsibility ........................................... 8
Examples of Software Correctable Symptoms .................... 8
Checking the Software Version ............................................ 8
No Video .............................................................................. 9
Audio Troubleshooting ................................................... 12
Power Supply Troubleshooting ...................................... 12
Completely Dead Set ............................................................ 12
Won’t Power On .................................................................... 12
Protection Shutdown ..................................................... 13
Backlight Issues ............................................................. 13
No Backlight, No Shutdown ............................................... 15
Diagnostics History ........................................................ 15
TCON Troubleshooting .................................................. 20
Introduction .................................................................... 20
LCD Panel Basics .............................................................. 20
Gate Drivers ....................................................................... 23
Source Drivers ................................................................... 23
Diagnosing a Failed TCON ............................................ 23
TCON Failures ................................................................... 25
Troubleshooting a “DEAD” TCON ......................................... 25
Examples of Actual TCON Failures ................................... 27
LCD Panel Failures ............................................................ 29
Overview .......................................................................... 1
Features .......................................................................... 1
720p Panel ........................................................................... 1
CCFL Backlighting ............................................................... 1
USB2.0 Input ....................................................................... 1
HDMI 1.3 .............................................................................. 1
Consumer Electronics Control (CEC) ..................................... 1
xvYCC ..................................................................................... 1
Deep Color .............................................................................. 1
Bravia® Sync ....................................................................... 2
Advanced Contrast Enhancer (ACE) ................................... 2
Overview .......................................................................... 3
Overall Circuit Description ............................................... 3
A Board ................................................................................ 3
Tuner ....................................................................................... 3
MT5388 Processor .................................................................. 3
Power Supply ....................................................................... 4
KDL22BX300 .......................................................................... 4
KDL32BX300 .......................................................................... 4
Inverter ................................................................................. 4
Switch Unit ........................................................................... 4
H Board ................................................................................ 4
Introduction ...................................................................... 7
Page 17
Chapter 3 - Troubleshooting
Page 18
Chapter 3 - Troubleshooting
CTV-67 16
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. The LCD panel must be replaced.
Diagnostics History
Figure 3-6 illustrates an example of the diagnostics history page. Entry to
this page is achieved while the television is powered down and pressing
the following buttons on the remote commander: “DISPLAY”, “5”, “VOL –“,
“POWER”.
This feature is useful for failures which are intermittent or when the customer
is not sure what is causing the television to shut down sometimes. Once a
corrective action is determined the error events should be cleared to zero.
This is accomplished by pressing the “8” key followed by the “0” key on
the remote commander.
Test Points
The drawing in Figure 3-7 contains the board-to-board connector and pin
information to identify voltages, signal and control lines for troubleshooting
purposes for the KDL22BX300. Figure 3-8 applies to the KDL32BX300.
All critical voltages and control signals are easily accessed at the power
supply board. Use this drawing in conjunction with the previously discussed
troubleshooting techniques and flowcharts for testing operating voltages
and control signals.
Circuit Board and Connector Locations
Figure 3-9 illustrates the rear of a KDL22BX300 with the rear cover
removed. The location of the major circuit boards and connectors for
voltage checks is provided. Use this illustration to properly dress wires
and harnesses when replacing components. Figure 3-10 provides a
similar view of the KDL32BX300.
ERROR BLINK COUNT EVENT COUNT
OPERATING
HOURS
FIGURE 3-6
DIAGNOSTICS HISTORY PAGE
Page 33
Chapter 4 - Appendix
CTV-67 31
SOURCE TAB BOND FAILURE
MULTIPLE PIXEL FAILURE
GATE TAB BOND FAILURE
GATE TAB BOND FAILURE
Page 34
and i.Link are trademarks of Sony Electronics
2007 Sony Electornics, Inc.
SEL Service Company
16530 Vill Esprillo
National Training Dept. MZ3215
San Diego, CA 92127
Reproduction in whole or part without written permission is prohibited. All rights reserved
CTV67030110
