Sony KDL-55W900A Service Manual ▷ View online
KDL-55W900A 4
DIAGNOSING THE ERROR
Before servicing the Television:
1. Verify the TV has the symptom the customer indicated.
2. Check to see if the latest Software is installed.
a. If not, install the latest version.
3. Determine the replacement part required.
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.
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. Press
POWER
to turn on the TV and then turn it off again.
2. Press the following buttons on the
Remote Commander within 1
second of each other:
DISPLAY
Channel
5
Volume
-
POWER
NOTE:
This differs from accessing Service Adjustments Mode (Volume +).
SECTION 2 - TROUBLESHOOTING
Self Diagnosis
Supported model
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-55W900A 5
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.
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
8X
No
WIFI
Dead set
No
Video
Whole
Screen
Distortion
Isolated
Area
Distortion
No Audio
MAIN BOARD
*
▲ ▲
▲
▲
POWER SUPPLY
LCD Panel
TCON
▲
▲
SERVICE BULLETIN
▲
SOFWARE UPDATE
WLAN
Video
Protection Modes
4. Follow the associated flowcharts in the Training Manual to isolate the board.
Board
* Immediate Shutdown After Power ON & 7X
*NOTE: REFER TO LCD PANEL SERVICE MANUAL IN
REFERENCE LIBRARY DATABASE FOR CORRECT
REPLACEMENT PARTS BASED ON SERIAL NUMBER.
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-55W900A 6
SECTION 2 - TROUBLESHOOTING
FLOWCHARTS AND DIAGRAMS
OVERALL BLOCK DIAGRAM
VIDEO 2 CVBS/COMP
VIDEO 1 CVBS
RF
HDMI 1
SWITCH
UNIT
LCD PANEL
HFR
TCON
BA2S
L
R
HEAD PHONES
OUT
OPTICAL
AUDIO OUT
HDMI 3
IC4601
AMP
IC5500
HDMI
SWITCH
EQ
TUNER
ETHERNET
USB 1
HDMI 2
HDMI 4
LVDS
AC IN
IC9000
A/V
DECODER
VIDEO
PROCESS
USB 2
LED BACKLIGHTS
POWER SUPPLY
G1B
SMART CORE
BLUETOOTH
BT
WIFI
IR RX
LED’s
HIR
HSC
USB 3
LOCAL DIMMING
LD
MAIN BOARD
KDL-55W900A 7
SECTION 2 - TROUBLESHOOTING
POWER AND CONTROL BLOCK DIAGRAM
REG12V
GND
GL_CTRL
LD_ERR
1
3
4
3
4
5~9
DC_DIMMER
PWM DMMER
BL_ERR
1
3
2
BL_ON
GND
5
7~12
REG12V
STBY3.3V
13~18
21~24
21~24
CN6611
CN6401
CN6001
BA2S
G1B
11~14
AC_OFF_DET
POWER_ON
27
28
28
23
GND
1
3
5
5
7~12
13~18
21~24
21~24
27
28
28
23
DC_DIMMER
BL_ERR
BL_ON
GND
REG12V
STBY3.3V
AC_OFF_DET
POWER_ON
GND
PWM DIMMER
2
LD
TO LED
BACKLIGHTS
VLED_VCC
POWER SUPPLY
MAIN BOARD
LOCAL DIMMING
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