Read Sony KDL-22EX355 / KDL-32EX355 / KDL-40EX455 Service Manual online
KDL-22EX355/32EX355/40EX455 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. 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
]>
Panel Selection
<[
LTY320AN03
]>
SERIAL NUMBER EDIT
8500001
MODEL NAME EDIT
KDL-40EX455
[</>]Set [Home] Exit
Service Mode
4. Then press to view the
Self Check screen.
Back
<<
002 MAIN_ POWER
000
003 DC_ALERT1
000
003 AUDIO_PROT
000
004 BALANCER_ERR
000
0
0
0
R
R
E
_
N
O
C
T
5
0
0
005 PANEL_ID_NVM_ERR
000
006 BACKLIGHT_ERR
000
0
0
0
R
R
E
_
P
M
E
T
7
0
0
00031
00046
00031
[Home] Exit
SELF CHECK
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
NOT USED IN THIS MODEL SERIES
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.
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