Sony XBR-46HX929 / XBR-55HX920 / XBR-55HX929 Service Manual ▷ View online
XBR-46HX929/55HX920/55HX929 35
SECTION 4 - TROUBLESHOOTING
TRIAGE CHART
Use this general Triage Chart to determine what may possibly be causing the error before going out to the customers location.
Before you make the service call…
1. Confirm the symptom from the customer.
Chassis: AZ2-F
2. Select that symptom from the chart.
3. Bring
3. Bring
ONLY THE MOST LIKELY PART
for that symptom.
4. Follow the troubleshooting charts in the technical guides to isolate the board.
RED DOT: Most likely defective part
LAST UPDATED: 10/10/2011
No
Power
WIRELESS
LAN
Remote Audio
2
3
4*
4**
5
6
*7
8
10
No Green
Power LED
(Dead Set)
No video
Whole
Screen
Distortion
Isolated
area
distortion
No 3D
Double
images on
3D
Not working
No
Remote
No Audio
BATL BOARD
▲
POWER SUPPLY
BOARD
G7
(FOR 55" MODELS ONLY)
HLT2 BOARD
HEM2 BOARD
WIRELESS LAN CARD
Service Bulletin
See Appendix Section
Software Update
TCON Board
▲
▲
LCD Panel
▲
Problem
POWER
AUDIO/
POWER
BACK-
LIGHT
BACK-
LIGHT
TCON
CONV
TEMP
WDT
IR
SYNC
Reference
Symptoms - Shutdown. Power LED
blinking red diagnostics sequences
5. Chart Color Code
* ONLY IF 7X SHUTDOWN OCCURS IMMEDIATLEY
BLUE TRIANGLE: Secondary possible defective part
*4X WITH MOMENTARY BACKLIGHTING
**4X WITH N O BACKLIGHTING
Video
This Triage document is 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
http://www.sony.com/asp
.
XBR-46HX929/55HX920/55HX929 36
SECTION 4 - TROUBLESHOOTING
PROTECTION SHUTDOWN
Self Diagnosis
Supported model
Critical voltages 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
standby 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. For
Not all of the available protect codes are used in every model. 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 fluorescent
lamps. The information in this section contains the protect circuits
and diagnostics codes used in the models listed in this manual.
“Figure 4-3. Diagnostic Table” on page 38
provides guidance in
locating the possible component causing the shutdown.
STANDBY LED FLASH COUNT
Ambient Sensor/
(IR) Infrared Receiver
Picture Off /
Timer LED
Standby LED
Power LED
FIGURE 4-1. LED DISPLAY
2 times
5 times
LED ON 0.3 sec.
LED OFF 0.3 sec.
LED OFF 0.3 sec.
LED OFF
3 sec.
FIGURE 4-2. BLINK COUNT
XBR-46HX929/55HX920/55HX929 37
SECTION 4 - TROUBLESHOOTING
2X Blink - Main Power Error
A loss of REG12V from the power supply triggers this protect event.
A loss of REG12V from the power supply triggers this protect event.
The usual cause is a failure of the main switching supply. In some
instances, excessive loading on the secondary supply lines can
cause the switching regulator to stop, or fail again, if a replacement
board is installed.
3X Blink- DC Regulator/Audio Error
The Audio error can occur due on of the following error conditions.
3X Blink- DC Regulator/Audio Error
The Audio error can occur due on of the following error conditions.
● Defective DC Regulator on Main Board
● Defective Audio Amplifier (Main Board)
● Loss of AU12V (Open F4200 on Main Board)
● Loss of AU12V (Open Fuse on Power Supply Board)
In most cases, replacement of the main board will remedy a 3X error.
4X Blink – Balancer Error
The 4X error code is only used on models incorporating local
4X Blink – Balancer Error
The 4X error code is only used on models incorporating local
dimming LED backlighting. If a failure occurs on the LD board or one
of the LED’s fails in the panel the TV will shut down and display this
diagnostic code. Models using conventional non-local dimming LED
backlighting do not utilize this error code.
5X Blink - TCON Error
The 5X blink protection mode indicates a communications error
5X Blink - TCON Error
The 5X blink protection mode indicates a communications error
between the TCON Board and the X-Reality microprocessor on the
Main Board. 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.
6X Blink - Converter System Failure
If the converter circuit (located on the power supply or separate
If the converter circuit (located on the power supply or separate
converter board) fails to start or shuts down due to an over-voltage
or over-current condition, the TV will shut down and generate a 6X
error code. The diagnostic page labels this as a “Backlight Failure”
even though the backlights are not the source of the problem.
Replacement of the G5 Board (46”) or G7 Board (55”) should rectify
this problem.
7X Blink – Temperature Error
If the temperature inside the television becomes excessive, the
7X Blink – Temperature Error
If the temperature inside the television becomes excessive, the
temperature sensor (located on the Main Board) notifies the unit
to shut down and display a 7X error. Excessive temperature errors
will always occur when the unit has been running a while and can
be caused by excessive ambient heat or improper ventilation of the
television.
If the television shuts down immediately, this can be caused by a
If the television shuts down immediately, this can be caused by a
defective temperature sensing IC or failure of the communications
bus between the IC and the microprocessor. Replacement of the
main board is necessary.
8X Blink – Not listed in Self Check
8X blink code is mainly used during TV software development. Look
8X blink code is mainly used during TV software development. Look
in TV’s service SELF CHECK for error code history and notice at the
bottom of the list WDT (Watch Dog Timer) error codes, in particular
notice 103 HOST_WDT.
10X Blink – IR Sync Transmitter Failure
A failure of the infrared sync transmitter circuits on the HEM2 board
10X Blink – IR Sync Transmitter Failure
A failure of the infrared sync transmitter circuits on the HEM2 board
will cause a 10X error and replacement of this board will usually
rectify the problem. In rare cases, the main board could be the
source of the failure.
XBR-46HX929/55HX920/55HX929 38
SECTION 4 - TROUBLESHOOTING
DIAGNOSTIC CODE DESCRIPTIONS
The Diagnostic 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
http://www.sony.com/asp
.
Diagnostic Item
Diagnostic Item
Description
Number of times
Standby LED blinks
Probable Location
MAIN_POWER
Main Power Error
2
G5 Board (46" Models Only)
G6 Board (55" Models Only)
DC_ALERT
DC Regulator/Audio Error
AUD_PROT
Audio Error Detection
BALANCER
Balancer Error
4
LCD Panel
TCON ERR
TCON Error
P_ID_ERR
Panel ID NVM Error
BACKLITE
Backlight Error
6
G5 Board (46" Models Only)
G7 Board (55" Models Only)
TEMP_ERR
Temperature Error
7
Ventilation
BATL Board
103 HOST_WDT
Watch Dog Timer Notification
8
Service Bulletin (See Appendix Section)
Software Update
EMITTER
Emitter Error
10
HEM2 Board
3
BATL Board
5
TCON Control MT 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 website
at
http://esupport.sony.com
.
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