Sony XBR-55X900A Service Manual ▷ View online
XBR-55X900A 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 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
.
XBR-55X900A 6
SECTION 2 - TROUBLESHOOTING
FLOWCHARTS AND DIAGRAMS
OVERALL BLOCK DIAGRAM / BAFS
IR RX
OPTICAL
SENSE
POWER SUPPLY
POWER SUPPLY
VIDEO 2 CVBS/COMP
VIDEO 1 CVBS
RF
HDMI 1
LCD PANEL
HFR
TCON
L
R
OPTICAL
AUDIO OUT
HDMI 3
TUNER
ETHERNET
USB2.0
HDMI 2
LVDS
AC IN
USB HUB
LED DRIVE
LD
L
R
USB2.0
MAIN BOARD
IC9001
HP/LINE OUT
HDMI
SWITCH
EQ
USB3.0
BAFS
G7
G6
BLUETOOTH
HSF
HIF
WIFI
SMART CORE
SWITCH
UNIT
TS
A/V
DECODER
VIDEO
PROCESS
SUB-
WOOFER
AMP
HDMI4
CX/CX2
AMP
HW
HUS
IC9000
LVDS
XBR-55X900A 7
SECTION 2 - TROUBLESHOOTING
OVERALL BLOCK DIAGRAM / BAF2S
IR RX
OPTICAL
SENSE
POWER SUPPLY
POWER SUPPLY
VIDEO 2 CVBS/COMP
VIDEO 1 CVBS
RF
HDMI 1
LCD PANEL
HFR
TCON
L
R
OPTICAL
AUDIO OUT
HDMI 3
TUNER
ETHERNET
USB2.0
HDMI 2
LVDS
AC IN
USB HUB
LED DRIVE
LD
L
R
USB2.0
MAIN BOARD
IC9001
HP/LINE OUT
HDMI
SWITCH
EQ
USB3.0
BAF2S
G7
G6
BLUETOOTH
HSF
HIF
WIFI
SMART CORE
SWITCH
UNIT
TS
A/V
DECODER
VIDEO
PROCESS
SUB-
WOOFER
AMP
AMP
HW
HUS
IC9000
LVDS
HDMI
EQ
HDMI 4
XBR-55X900A 8
SECTION 2 - TROUBLESHOOTING
POWER AND CONTROL BLOCK DIAGRAM
BL_ERR
LD_ERR
BL_ON
1
2
3
4
AC IN (N)
AC IN (L)
1
3
CN6402
CN6401
CN6001
AC-L
3
AC-N
1
1
2
3
4
CN6102
CN6602
3
1
CN6101
VLED_VCC
GL_CTRL
VLED_GND
LD_ERR
1~4
7~9
11
12
REG_12V
14
E-LD
BOARD
DIGITAL_STBY
CN6601
2
5
AU_GND
24
25
TCON_12V
28
STBY3.3V
TCON_GND
AC_OFF_DET
BL_ERR
3
DIGITAL_STBY
REG_12V
26
27
GND
REG 12V
5
6
5
6
CN9101
BAFS/BAF2S
G7
MAIN POWER AND
CONVERTER
MAIN BOARD
PFC, PRI_VCC AND
STANDBY POWER SUPPLY
6
SENSE GND
BL_ON
6~11
GND
12~17
18~20
21~23
TCON_ON
STBY GND
POWER_ON
CN4803
20
5
4
TCON_12V
1
STBY3.3V
AC_OFF_DET
BL_ERR
DIGITAL_STBY
REG_12V
3
2
BL_ON
6~8
GND
18
12~14
TCON_ON
POWER_ON
19
REG_12V (AU)
1~3
GND (AU)
4~6
5
4
20
G6
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