KDL-46W950A, KDL-46W954A, KDL-46W955A, KDL-46W957A, KDL-55W950A, KDL-55W954A, KDL-55W955A, KDL-55W957A - Sony TV Service Manual (repair manual). Page 16

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Self Diagnostic Function
2-4. Standby LED Error Display
2-2. LED Display Control
Status
White Center LED
Side RGB LED
Side Amber LED
Remarks
Power Off
( by power saving switch 
off and *1)
Off
Off
Off
*1  power switch off (by side 
key) 
Power On
White
Off
Off
Main-micro is in normal 
Note: Details refer to Troubleshooting Section.
Smart Core RED 
LED blinking 
count
Detection Items
Board Error Item
Power On
White
Off
Off
operation
Standby
( by remote control off only 
)
Off
Off
Off
Main-micro block is in sleep 
mode
Skype Call Receive
white
white blinking
Off
Picture Off
White looping 
breathing
one time blinking
Off
   Main 19.5V failure [MAIN_POWE]

Power Adaptor
   * This failure is not saved

B* Board Error 
Main 5.0/3.3/1.8/1.0/ 1.1V failure [DC_ALERT]
* 5.0/1.0V failures are not saved.

B* Board Error 

Speaker Error
2x

B* Board Error 
   Audio amp. protection [AUD_PROT]
breathing
Device Connection
White
cyan
Off
Set "On Timer"/ Reminder 
/ Set "Rec Timer"
( Power On )
White
Orange
Off
Set "On Timer"/  Reminder 
/ Set "Rec Timer"
Off
Off
Orange

Speaker Error 
HDMI equalizer/switch I2C NACK [HDMI_EQ]    
*There is Temp. sensor on the same I2C bus

B* Board Error 
Tuner or demodulator I2C NACK [TU_DEMOD]

B* Board Error 
AFE device I2C NACK [AFE I2C]

B* Board Error 
3x
( Standby )
Failure
Off
Red 
Blinking
Off
The number of LED blinking 
indicates cause of failure
( refer to the table of next 
page )
Aging mode
white 
Green Blinking
Off
Blinking:0.5sec On / 0.5sec 
Off
[
_
]
AFE device SPI NACK [AFE_SPI]                    
(only for AEP,CH,HK)

B* Board Error 
LED Driver Error
Panel Module 
T Con Error [TCON ERR] (MD/MW/HG/TE
LED Driver Error [LD_ERR]  (HG/TE Model)
4x
Off
End of Aging mode
White
Green Blinking
Off
Blinking:3sec On / 3sec Off
Software Updating
white blinking
white blinking
off
Software Updating finish
Off
Blue lit
off
Test Reset 
White
white blinking
Off
Error of panel ID
Off
Green Blinking
Orange
Blinking
Blinking:0.5sec On / 0.5sec 
Off
REC [AEP/J
l ]
Whit
R d(Pi k) Lit
Off
T Con Error [TCON_ERR] (MD/MW/HG/TE 
Model)
Tcon Board

Panel 
module 
  Tcon
board

G*
 Board Error 

B* Board Error 
Panel ID EEPROM I2C NACK (Also panel 
power failure is a suspect) [P_ID_ERR]
5x
REC [AEP/J only]
White
Red(Pink) Lit
Off
Picture Frame
White
Orange
Off
ePOP/
Shop Illumination
White
Cyan Lit/
Cyan loop
Off
One shot Center White when 
feature change
When safety shutdown occurs, Standby LED display reports the cause by using the lightning
2-3. LED Pattern
6x
LED driver [BACKLITE]
LED Driver (LD) Board Error 
Over temperature protection [TEMP_ERR]
*Temp. sensor I2C NACK [TEMP_ERR]  *There 
is HDMI Eq on the  same I2C bus.
8x
Software Error  (VPS/MEPS/HOST/STBY/AFE 
WDT)
B* B
d E
7x
B* Board Error 
patterns as indicated below
3.0sec
3.0sec
0.
5sec
WDT)
B* Board Error 
Size
B*
Board 
Type
G*
Board 
Type
46”
BM
G3A
16
0.5sec
Example: The figure above shows LED display when SHUTDOWN is caused by Audio 
Error. It repeats flashing for a specified number of times in 0.5sec/cycle and has a 3 seconds
interval of lighting off. Please note that a 3 seconds interval of lighting off is fixed regardless of abnormal state types.
46”
BM
G3A
55”
BM
G3B
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