Sony KDL-55W950B Service Manual ▷ View online
KDL-55W950B 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.
No
Power
Remote
Audio
Smart
Core
2X 3X 4X 5X 6X 7X 8X 9X
No White
Power
LED
Steady
lines or
dots
No Video
One of
Inputs
No Video
All Inputs
No Remote
Wireless
can't
connect
Bluetooth
can't
connect
No Audio
No LED
MAIN BOARD
▲
▲ ▲
▲
▲
▲
▲
▲
▲
TUNER BOARD
▲
▲
▲
▲
POWER BOARD
▲
▲
▲
LCD PANEL
▲
▲
LVDS FFC
▲ ▲
▲
▲
H BOARD
SPEAKER
▲
LD BOARD
▲
BT BOARD
WIFI
Problem
POWER
AUDIO/
POWER
POWER
LD
TCON
BACK-
LIGHT
LIGHT
TEMP
SOFT-
WARE
4. Follow the associated flowcharts in the Training Manual to isolate the board.
Board
Reference
Symptoms - Shutdown. Power LED blinking
red diagnostics sequences
Video
Network
*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 Service Portal
at
http://www.sony.com/asp
.
KDL-55W950B 6
SECTION 2 - TROUBLESHOOTING
FLOWCHARTS AND DIAGRAMS
OVERALL BLOCK DIAGRAM
TUNER
VIDEO 2 CVBS/COMP
VIDEO 1 CVBS
CABLE/
HDMI 1 / MHL
SWITCH
UNIT
HFR
TCON
L
R
HEADPHONES
OUT
OPTICAL
AUDIO OUT
HDMI
USB
HUB
HUB
SWITCH
EQ
ETHERNET
USB
HDMI 4
LVDS
AC IN
A/V
DECODER
VIDEO
PROCESS
WIFI
IR RX
LED’s
HIR
HSC2
SMART CORE
LD
BT
HDMI 2 /ARC
HDMI 3
USB
CAMERA
MIC
TUNER
AUDIO
AMP
TUNER
DEMODULATOR
ADC / DACAMP
MAIN BOARD
TUNER BOARD
ANTENNA
LCD PANEL
LED BACKLIGHTS
LOCAL DIMMING
POWER SUPPLY
BOARD
SWITCH
UNIT
G1A
BAX
USB
HUB
HUB
KDL-55W950B 7
SECTION 2 - TROUBLESHOOTING
POWER AND CONTROL BLOCK DIAGRAM
CN6401
CN9101
POWER_ON
28
21
3
30
BL_ERR
10
29
GND
STBY3.3V
23
12
5
28
BL_ON
GND
21
14
12
27
GND
REG12V
18
8
7
26
GND
REG12V
17
16
14
25
REG12V
REG12V
16
23
9
24
GND
REG12V
15
18
16
23
REG12V
REG12V
14
25
11
22
GND
REG12V
13
20
28
21
POWER_ON
GND
12
27
13
20
+19.5V
GND
11
22
15
18
+19.5V
GND
10
29
17
16
+19.5V_SS
GND
9
24
21
14
GND
GND
7
26
23
12
STBY3.3V
BL_ON
5
28
27
10
AC_OFF_DET
BL_ERR
3
30
18
8
+19.5V_HOLD
T-CON_ON
26
NC
GND
10
19
10
19
GND
PS_STATUS
25
NC
GND
9
17
9
17
GND
GND
24
NC
LD_STDBY
8
15
8
15
LD_STBY
GND
22
NC
TS_OUT
6
11
6
11
TEMP_SENSOR
T-CON_VCC12V
20
NC
SPI_CLK
5
9
5
9
LD_PWM_3 (0_SPI_CLFK)
T-CON_Vcc12V
19
NC
SPI_DATA
4
7
4
7
LD_PWM_2 (0_SPI_DATAF)
GND
8
NC
SPI_LAT
3
5
3
5
LD_PWM_1 (0_SPI_LATF)
DIGITAL_STBY
6
NC
EMIT_IN
2
3
2
3
LD_PWM_0 (0_EMT__IN)
BLINKING
4
NC
SA_MODE
1
1
1
1
LD_MODE_SW
PWM_DIMMER
2
NC
BL_TYPE3
7
NC
NC
13
FB_REF
DC_DIMMER
1
NC
CN2001
NC
6
IP_REF
CN6601
NC
4
TCON_ON
VLED_VCC
1
14
1
14
VLED_VCC
NC
2
DIGITAL_STBY(NC)
VLED_VCC
2
13
2
13
VLED_VCC
VLED_VCC
3
12
3
12
VLED_VCC
VLED_VCC
4
11
4
11
VLED_VCC
VLED_GND
6
9
6
9
VLED_GND
VLED_GND
7
8
7
8
VLED_GND
VLED_GND
8
7
8
7
VLED_GND
VLED_GND
9
6
9
6
VLED_GND
SIGNAL_GND
10
5
10
5
VLED_GND
LD_ERR
11
4
11
4
LD_ERR
GL_CTRL
12
3
12
3
GL_CTRL
REG12V
14
1
14
1
SET_12V
NC
5
NC
NC
10
NC
NC
13
NC
NC
2
NC
CN2002
CN6101
1
AC-N
2
AC-L
POWER SUPPLY BOARD
AC_IN
LD BOARD
LD
G1A
MAIN BOARD
AC_OFF_DET
27
10
BAX
KDL-55W950B 8
SECTION 2 - TROUBLESHOOTING
NO POWER FLOWCHART
No Power
Is Standby LED
blinking?
No
Yes
No
See Stanby
LED Blinking
Flowchart
Yes
Does red
Standby LED on
front panel light?
High (>2.5V)
on Pin 27 of CN6401
on Power Supply
Board?
Yes
No
Main Board*
Press power button while
monitoring Pin 28
of CN6401 on
Power Supply
Board.
High (3.3V)
appears
momentarily?
Yes
No
Power Supply
Board*
Power Supply
Board*
Power Supply
Board*
Remove AC power and
wait at least 30
seconds before
reapplying.
*For Part Number information, refer to
“Section 4 - Exploded View/Part Number Information” on page 19
.
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