Sony XBR-55X850B / XBR-65X850B Service Manual ▷ View online
XBR-55X850B/65X850B 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 Skype
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
(IR RC)
MAIN BOARD
▲
▲ ▲
▲
▲
▲
▲
▲
▲
▲
▲
TUNER BOARD
▲
▲
▲
▲
▲
K BOARD
▲
POWER SUPPLY
▲
▲
H BOARD
SPEAKER
▲
CAMERA MODULE
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
MIC MODULE
WIFI
Problem
POWER
POWER
AUDIO
LOCAL I2C
4K
UNIQUE
(ROGUE/
SCORPIO
4K FRC)
LD
TCON
BACK-
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.
Can’t
work
BT MODULE
LD BOARD
LVDS FFC
TCON
LCD PANEL
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
.
XBR-55X850B/65X850B 6
SECTION 2 - TROUBLESHOOTING
FLOWCHARTS AND DIAGRAMS
OVERALL BLOCK DIAGRAM
VIDEO 2 CVBS/COMP
VIDEO 1 CVBS
HDMI 1 / ARC
SWITCH
UNIT
HFR
TCON
HEADPHONES
OUT
OPTICAL
AUDIO OUT
HDMI
SWITCH
EQ
ETHERNET
USB
HDMI 4 / MHL
AC IN
A/V
DECODER
VIDEO
PROCESS
LD
HDMI 2 / MHL
HDMI 3
USB
TUNER
TUNER
DEMODULATOR
ADC / DACAMP
MAIN BOARD
TUNER BOARD
LCD PANEL
LED BACKLIGHTS
LOCAL DIMMING
BAXF
USB
HUB
ETHER
PHY
AUDIO
AMP
HUB
CAMERA
USB
WIFI
MIC
IR RX
LED’s
HIR
HSC2
SMART CORE
BT
SWITCH
UNIT
RF
L
R
L
R
K2 BOARD
AUDIO
AMP
1
AUDIO
AMP
2
POWER SUPPLY
G7A/G7C
XBR-55X850B/65X850B 7
SECTION 2 - TROUBLESHOOTING
POWER AND CONTROL BLOCK DIAGRAM
CN6401
CN9700
NC
1
NC
28
1 POWER_ON
DIGITAL_STBY
2
18
27
2 AC_OFF_DET
BL_ERR
3
20
26
3 TCON_ON
NC
4
NC
25
4 STBY+3.3V
BL_ON
5
19
20
5 T_CON_VCC12V
GND
6
4
17
6 REG+12V
GND
7
5
16
7 REG+12V
GND
8
6
15
8 REG+12V
GND
9
14
NC
9 LD0SLAT
GND
10
13
NC
10 LD0SEMIT
GND
11
12
NC
11 LD_STBY
REG12V
12
1
11
12 GND
REG12V
13
2
10
13 GND
REG12V
14
3
9
14 GND
REG12V
15
8
NC
15 LD0SCLK
REG12V
16
7
NC
16 LD0SWDATA
REG12V
17
6
NC
17 GND_LD
T-CON_VCC12V
18
4
2
18 DIGITAL_STBY
T-CON_VCC12V
19
5
5
19 BL_ON
T-CON_VCC12V
20
5
3
20 BL_ERR
T-CON_VCC12V
21
NC
T-CON_GND
22
1
T-CON_GND
23
2
TCON
T-CON_GND
24
NC
22
1 GND
STBY_3.3V
25
4
23
2 GND
T-CON_ON
26
3
NC 3 NC
AC_OFF_DET
27
2
18
4 PWR Power V 12 IN
POWER_ON
28
1
19
5 PWR Power V 12 IN
AC_IN CN6101
K2 - CN4802
AC-N
1
12
1 PVDD(AU)
AC-L
2
13
2 PVDD(AU)
14
3 PVDD(AU)
6
4 GND
CN6601
7
5 GND
VLED_VCC
1
14
8
6 GND(AU)
VLED_VCC
2
13
VLED_VCC
3
12
VLED_VCC
4
11
LD - CN2002
NC
5 NC
14
1 SET_12V
VLED_GND
6
9
NC
2 SA_REF_L
VLED_GND
7
8
12
3 GL_CTRL
VLED_GND
8
7
11
4 LD_ERR
VLED_GND
9
6
10
5 VLED_GND
SENSE_GND
10
5
9
6 VLED_GND
LD_ERR
11
4
8
7 VLED_GND
GL_CTRL
12
3
7
8 VLED_GND
NC
13 NC
6
9 VLED_GND
REG12V
14
1
NC
10 SA_REF_H
4
11 VLED_VCC
3
12 VLED_VCC
2
13 VLED_VCC
1
14 VLED_VCC
MAIN BOARD
POWER SUPPLY
XBR-55X850B/65X850B 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 28 of CN6401
on Power Supply?
Yes
No
Main Board*
Press power button while
monitoring pin 27
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 21
.
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