Sony KDL-32BX311 Service Manual ▷ View online
KDL-32BX311
24
SECTION 4 - TROUBLESHOOTING
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. 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 -
POWER .
* NOTE: This differs from accessing Service Adjustments Mode (Volume +)
Back
<<
002 MAIN_POWE
001
001 indicates an error was detected
003 AUD_PORT
000
000 indicates no error was detected
003 DC_ALERT
000
004 BALANCER
000
005 TCON_ERR
000
005 HFR_ERR
000
005 P_ID_ERR
000
005 PANEL_POWE
000
006 BACKLITE
000
007 TEMP_ERR
000
00000 00010 00000
[Menu] Exit
Panel Operation Time by Hour (max 99999)
Boot Count (max 99999)
Total Operation Time by Hour (max 99999)
SELF CHECK
KDL-32BX311
25
SECTION 4 - TROUBLESHOOTING
CLEARING THE SELF CHECK DIAGNOSTIC LIST
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”.
1. To clear the Error history and Error count: Press the
Channel 8
Channel 0 .
To clear the Panel operation time: Press the Channel 7
Channel 0 .
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.
TEST POINTS
“Figure 5-5. Power and Control Block Diagram” on page 30
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 board. Use this drawing in conjunction with the previously
discussed troubleshooting techniques and flowcharts availalbe in
“Section 5 - Flow Charts and Diagrams” on page 26
for testing
operating voltages and control signals.
KDL-32BX311
26
SECTION 5 - FLOW CHARTS AND DIAGRAMS
VIDEO INFORMATION
No Video
Backlights
turned on?
Unplug LVDS
connector at
TCON while unit
is running. This
may need to be
done more than
once
Any flashes
seen on
screen?
Yes
No
TCON
(LCD Panel)
Any OSD
graphics
present?
No
Main Board
No
TCON
(LCD Panel)
Yes
Yes
Main Board
FIGURE 5-1. NO VIDEO FLOWCHART
KDL-32BX311
27
SECTION 5 - FLOW CHARTS AND DIAGRAMS
Video Distortion
Is distortion
across entire
screen?
Any horizontal
lines?
No
No
Yes
Yes
Improper of
missing colors?
Yes
No
Vertical lines
or bars?
No
Yes
Lines move
when wide-
mode
changed?
Yes
No
TCON
(LCD Panel)
LCD Panel
Any single or
isolated vertical
lines?
Yes
LCD Panel
More than 1
vertical band?
No
Yes
TCON
(LCD Panel)
Main Board
Main Board
FIGURE 5-2. VIDEO DISTORTION FLOWCHART
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