Sony KDL-40EX645 / KDL-46EX641 / KDL-46EX645 / KDL-50EX645 / KDL-55EX645 Service Manual ▷ View online
KDL-40EX645/46EX641/46EX645/50EX645/55EX645 8
SECTION 2 - TROUBLESHOOTING
VIEWING THE SELF CHECK DIAGNOSIS HISTORY
When an error is detected, the Self Check screen records 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. TV must be in Standby mode.
2. Press the following buttons on the
2. Press the following buttons on the
Remote Commander within a
second of each other:
DISPLAY
Channel
5
Volume
+
POWER
3. To access the Self diagnosis history page, press until
Self
diagnosis history is highlighted.
Sound Adjustment
>>
Wide Band Tuning
>>
Range Scan…
>>
Self diagnosis history
>>
Status Information…
>>
LVDS Spectrum(%0)
<[
25
]>
DPMS
<[
Off
]>
Low of HPD
<[
5
]>
TVD_MCDONE_CNT
<[
20
]>
Demo Special
>>
Bypass AVI Info Detect
<[
On
]>
Panel Selection
<[
V500HK1-LS5
]>
UART Selection
No Log
SERIAL NUMBER EDIT
5000004
MODEL NAME EDIT
KDL-50EX65
[</>]Set [Home] Exit
Service Mode
4. Then press to view
Self Check screen.
Back
<<
002
MAIN_ POWER
001
003
AUDIO_PROT
000
003
DC_ALERT1
000
004
BALANCER
000
005
TCON_ERR
000
005
PANEL_POWE
000
006
BACKLITE
000
007
TEMP_ERR
000
00150
00075
00007
[Menu] Exit
SELF CHECK
Indicates
no error
has
occurred
no error
has
occurred
Indicates
an error
has
occurred
an error
has
occurred
SAMPLE SELF CHECK DIAGNOSIS PAGE
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
The REG 5V and D3.3V source originating on the Main Board is monitored
for low-voltage conditions by the CPU. A failure causing a 3X shutdown
requires replacing the Main Board.
4X Blink – Balancer Error
The 4X error code is only used on models incorporating local dimming LED
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.
5X Blink - TCON Error/Panel Error
The 5X blink protection mode indicates a communications error with the
timing control circuits (TCON Board) has occurred. If the TCON Board is
available for replacement, replace it, if not, replace the LCD Panel Assembly.
In rare cases a loose or defective LVDS cable could also be the cause.
KDL-40EX645/46EX641/46EX645/50EX645/55EX645 9
SECTION 2 - TROUBLESHOOTING
6X Blink - Backlight Converter System Failure
If the converter circuits fails to generate high voltage or one or more of
the backlight fails to light, the television will shut down and display this
diagnostics error.
7X Blink - Temperature Failure
A digital thermometer IC located on the Main Board provides a temperature
A digital thermometer IC located on the Main Board provides a temperature
reading of the chassis and LCD panel. If the temperature exceeds a pre-
determined point the TV will shut down. If this problem occurs immediately
at turn-on, the temperature sensing IC has failed and replacing the main
board is required. If this occurs after the TV has been running for a while,
check for ventilation issues that could cause the TV to run hotter than
normal.
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.
RED DOT: (Primary) Most likely defective part.
2. Select that symptom from the chart.
BLUE Triangle: (Secondary) Possible defective part.
3. Bring the primary component listed for that symptom.
5. Chart Color Code.
LAN
Power
Audio
2X 3X 4X
5X 6X 7X
NO WIFI
Dead set
No Video
Whole
Screen
Distortion
Isolated
Area
Distortion
No Audio
Main Board
*
▲
▲
▲
Power Supply
***
LD Board
LCD Panel
**
TCON
▲
▲
WLAN Card
▲
▲
▲* Secondary Component
**Backlight Turns ON before TV Shuts Off
4. Follow the associated flowcharts in the Training Manual to isolate the board.
***Backlight Does NOT Turn ON before TV Shuts Off
Video
Protection Modes
Board
* TV Immediate Shuts Off After Power ON & 7X
*NOTE: REFER TO LCD PANEL 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-40EX645/46EX641/46EX645/50EX645/55EX645 10
SECTION 3 - FLOW CHARTS AND DIAGRAMS
BLOCK DIAGRAM
ALL MODELS EXCEPT KDL-50EX645
Component/Composite
RF
Composite
HDMI 1
PC HD15
POWER SUPPLY
SWITCH
UNIT
LED
IR RX
LCD PANEL, TCON, &
LED BACKLIGHTS
A
GL5A (40")
H
L
R
ANALOG AUDIO OUT
OPTICAL AUDIO OUT
MT5389
A/V DECODER
A/V PROCESS
TUNER
USB 1
HDMI 2
LVDS
AC IN
CLASS D
AUDIO
AMP
GL5B (46")
GE55 (55")
HDMI 3
HDMI 4
Ethernet
USB 2
LVDS
Power
Power
Power/Control
Power/Control
Power/Control
WIRELESS LAN CARD
MAIN BOARD
IR BOARD
OVERALL BLOCK DIAGRAM
KDL-40EX645/46EX641/46EX645/50EX645/55EX645 11
SECTION 3 - FLOW CHARTS AND DIAGRAMS
KDL-50EX645 ONLY
Component/Composite
RF
Composite
HDMI 1
PC HD15
POWER SUPPLY
SWITCH
UNIT
LED
IR RX
LCD PANEL, TCON, &
LED BACKLIGHTS
A
H
L
R
ANALOG AUDIO OUT
OPTICAL AUDIO OUT
MT5389
A/V DECODER
A/V PROCESS
TUNER
USB 1
HDMI 2
LVDS
AC IN
CLASS D
AUDIO
AMP
GE50
HDMI 3
HDMI 4
Ethernet
USB 2
LVDS
LD
WIRELESS LAN CARD
MAIN BOARD
IR BOARD
OVERALL BLOCK DIAGRAM FOR KDL-50EX645
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