Sony KDL-40HX750 / KDL-46HX750 / KDL-46HX751 / KDL-55HX750 / KDL-55HX751 Service Manual ▷ View online
KDL-40HX750/46HX750/46HX751/55HX750/55HX751 8
SECTION 2 - TROUBLESHOOTING
VIEWING THE SELF CHECK DIAGNOSIS HISTORY
When an error is detected, the Self Check screen records the date(s) and
the number of times the error occurred. This is helpful in confirming past
occurrences of an error, and for determining if an error is intermittent when
the customer is not sure what is causing the television to shut down. If the
screen displays a “0”, no error has occurred.
1. Take the TV out of deep Standby mode by pressing
POWER
to
turn on the TV.
2. Press
POWER
to turn the TV back off.
3. 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 +).
SELF CHECK
000 RESERVED
--------------------- --------------------- --------------------- 00
000 RESERVED
--------------------- --------------------- --------------------- 00
002 MAIN_POWE --------------------- --------------------- --------------------- 00
003 DC_ALERT
--------------------- --------------------- --------------------- 00
003 AUD_PROT
--------------------- --------------------- --------------------- 00
003 HDMI_EQ
--------------------- --------------------- --------------------- 00
003 TU_DEMOD
--------------------- --------------------- --------------------- 00
004 VLED
--------------------- --------------------- --------------------- 00
004 LD_ERR
--------------------- --------------------- --------------------- 00
005 HFR_ERR
--------------------- --------------------- --------------------- 00
005 TCON_ERR
120123132522 120123113645 --------------------- 02
005 P_ID-ERR
--------------------- --------------------- --------------------- 00
006 BACKLITE
--------------------- --------------------- --------------------- 00
007 TEMP_ERR
--------------------- --------------------- --------------------- 00
007 FAN_ERR
--------------------- --------------------- --------------------- 00
010 EMITTER
--------------------- --------------------- --------------------- 00
101 VPC_WDT
--------------------- --------------------- --------------------- 00
102 MEPS_WDT
--------------------- --------------------- --------------------- 00
103 HOST_WDT
--------------------- --------------------- --------------------- 00
104 STBY_WDT
--------------------- --------------------- --------------------- 00
00345 000333 06789
Total operation time by hour (MAX:65535)
Boot count (MAX:65535)
Panel operation time by hour (MAX:65535)
Total operation time by hour (MAX:65535)
Boot count (MAX:65535)
Panel operation time by hour (MAX:65535)
StandBy LED
Blink Count
Diagnosis
Item
Date and Time Display*
Error Count
(00-99)
*Format of Error History = YYMMDDhhmmss example 120123132522= Jan 23, 2012 13:25:22 (1:25:22PM)
NOTE: date and time must be set for this to work
SAMPLE SELF CHECK DIAGNOSIS PAGE
KDL-40HX750/46HX750/46HX751/55HX750/55HX751 9
SECTION 2 - TROUBLESHOOTING
2X Blink - Main Power Error
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/HDMI/Tuner
Several items are monitored on the Main Board. Any error detected in the
following circuits will cause the television to shut down and generate a 3X
error:
●
Loss of regulated B+ circuits
●
Audio amplifier failure
●
HDMI equalizer IC
●
Tuner demodulator circuits
In most cases, replacement of the Main Board will remedy a 3X error.
4X Blink – Balancer Error
NOT USED IN THIS MODEL SERIES.
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
An open LED in the backlight strings will cause an over-voltage condition
in the converter circuits. The symptom will be a momentary appearance
of the backlights (Sony logo may appear) followed by a 6X shutdown.
Replacement of the LCD Panel is required to remedy this condition.
If the converter fails to generate voltage for the LED backlights, the low-
If the converter fails to generate voltage for the LED backlights, the low-
voltage protection circuits are activated and the television will shut down
with a 6X error. Replacement of the Power Supply Board should remedy
this condition.
7X Blink - Temperature Failure
If the temperature inside the television becomes excessive, the temperature
sensor (located on the Main Board) notifies the TV to shut down and display
a 7X error. Excessive temperature errors will always occur when the TV
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 defective
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
The 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. If this error code appears, check for any additional documentation on
the Sony ESI site.
10X Blink – IR Sync Transmitter Failure
A failure of the infrared sync transmitter circuits on the HEM3 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.
KDL-40HX750/46HX750/46HX751/55HX750/55HX751 10
SECTION 2 - TROUBLESHOOTING
TRIAGE CHART
Use this general Triage Chart to determine what may possibly be causing the error before going out to the customers location.
1. Confirm the symptom from the customer.
2. Select that symptom from the chart.
▲
3. Bring the primary component listed for that symptom.
3D
o
i
d
u
A
r
e
w
o
P
N
A
L
2X 3X 4X 5X 6X 7X 8X
10X
No
WIFI
Dead set
No Video
Whole
Screen
Distortion
Isolated
Area
Distortion
No 3D
No Audio
Main Board
*
▲
▲
▲
▲
Power Supply
HL
HEM3
LCD Panel
▲
TCON
▲
▲
SERVICE BULLETIN
SOFTWARE UPDATE
WLAN
BLUE Triangle: (Secondary) Possible defective part.
5. Chart Color Code.
RED DOT: (Primary) Most likely defective part.
Video
Protection Modes
4. Follow the associated flowcharts in the Training Manual to isolate the board.
Board Reference
* Immediate Shutdown After Power ON & 7X
*NOTE: REFER TO LCD PANELS SERVICE MANUAL IN REFERENCE
LIBRARY DATABASE FOR CORRECT REPLACEMENT PARTS BASED
ON SERIAL NUMBER.
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
.
KDL-40HX750/46HX750/46HX751/55HX750/55HX751 11
SECTION 3 - FLOW CHARTS AND DIAGRAMS
BLOCK DIAGRAM
VIDEO 2 CVBS/COMP
VIDEO 1 CVBS
RF
HDMI 1
PC HD15
SWITCH
UNIT
LED
IR RX
LIGHT SENSE
LCD PANEL
HFR
TCON
BAPS
HL
L
R
ANALOG AUDIO
OUT
OPTICAL
AUDIO OUT
HDMI 3
IC4601
AMP
IC5500
HDMI
SWITCH
EQ
TUNER
EITHERNET
USB2.0
HDMI 2
HDMI 4
LVDS
AC IN
IR
TRANSMITTER
HEM3
WIRELESS
LAN CARD
IC9000
A/V
DECODER
VIDEO
PROCESS
USB2.0
USB HUB
LED BACKLIGHTS
POWER SUPPLY/
CONVERTER
GL7 (55")
GL6 (40”/ 46")
L
R
IC4701
SUB-
WOOFER
AMP
MAIN BOARD
OVERALL BLOCK DIAGRAM
Click on the first or last page to see other KDL-40HX750 / KDL-46HX750 / KDL-46HX751 / KDL-55HX750 / KDL-55HX751 service manuals if exist.