Sony XBR-85X955B Service Manual ▷ View online
XBR-85X955B 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
XBR-85X955B 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 2
AC IN
A/V
DECODER
VIDEO
PROCESS
LD
HDMI 2 / MHL
HDMI 3
USB
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
L
R
L
R
K BOARD
AUDIO
AMP
1
AUDIO
AMP
2
POWER SUPPLY
G6
POWER SUPPLY
POWER SUPPLY
G5
G3
CABLE
ANTENA
TUNER
XBR-85X955B 7
SECTION 2 - TROUBLESHOOTING
POWER AND CONTROL BLOCK DIAGRAM
CN6401
CN9700
N
C
1
N
C
28
1
POW
ER_
ON
POW
ER_
ON
DIGI
TA
L_
ST
BY
2
18
27
2
AC_
AC_
O
FF
_D
ET
BL
_ERR
3
20
26
3
TCON
_ON
TCON
_ON
N
C
4
N
C
25
4
ST
ST
BY+
3.3
V
BL
_ON
5
19
20
5
T_
T_
CON
_V
_V
CC
12
V
GN
D
D
6
4
17
6
REG+
REG+
12
V
GN
D
D
7
5
16
7
REG+
REG+
12
V
GN
D
D
8
6
15
8
REG+
REG+
12
V
GN
D
D
9
14
N
C
9
LD
LD
OS
LA
T
GN
D
D
10
13
N
C
10
LD
OGEM
IT
GN
D
D
11
12
N
C
11
LD
_S
TBY
REG
12
12
V
12
1
11
12
GN
D
D
REG
12
12
V
13
2
10
13
GN
D
D
REG
12
12
V
14
3
9
14
GN
D
D
REG
12
12
V
15
8
N
C
15
LD
OS
CL
K
REG
12
12
V
16
7
N
C
16
LD
OS
W
DA
TA
REG
12
12
V
17
6
N
C
17
GN
D_
D_
LD
T-CON
_V
_V
CC
12
V
18
18
4
2
18
DIGI
TA
L_
ST
BY
T-CON
_V
_V
CC
12
V
19
19
5
5
19
BL
_ON
T-CON
_V
_V
CC
12
V
20
20
5
3
20
BL
_ERR
T-CON
_V
_V
CC
12
V
21
21
3
T-CON
_GN
D
_GN
D
22
1
T-CON
_GN
D
_GN
D
23
2
TC
O
N
T-CON
_GN
D
_GN
D
24
N
C
22
1
GN
D
GN
D
ST
BY_
3.3
V
25
4
23
2
GN
D
GN
D
T-CON
_ON
_ON
26
3
21
3
PW
PW
R
Po
we
r V
12
IN
AC_
O
FF
_D
ET
27
2
18
4
PW
PW
R
Po
we
r V
12
IN
POW
ER_
ON
ER_
ON
28
1
19
5
PW
PW
R
Po
we
r V
12
IN
AC
_IN
C
N610
1
K0
- C
N480
1
AC-
N
1
12
1
PV
PV
DD
(A
U)
AC-
L
2
13
2
PV
PV
DD
(A
U)
14
3
PV
PV
DD
(A
U)
CN640
2
6
4
GN
D
GN
D
BL
_ERR
1
1
7
5
GN
D
GN
D
LD
_ERR
2
2
8
6
GN
D(A
GN
D(A
U)
DIGI
TA
L_
ST
BY
3
3
BL
_ON
4
4
GN
D
D
5
5
REG
12
12
V
6
6
CN610
2
AC-
N
1
1
AC-
L
3
3
G
5
CN610
1
AC-
N
1
1
AC-
L
3
3
CN650
3
PF
C_
OUT
1
1
PF
C_
GN
D
D
2
2
CN610
2
PRI
_V
CC
1
1
PRI
_GN
D
D
2
2
CN650
1
PRI
_V
CC
1
1
PRI
_GN
D
D
2
2
CN650
3
PF
C_
OUT
1
1
PF
C_
GN
D
D
2
2
CN660
3
BL
_ERR
1
1
LD
_ERR
2
2
DIGI
TA
L_
ST
BY
3
3
BL
_ON
4
4
GN
D
D
5
5
REG
12
12
V
6
6
CN640
1
LD
- C
N200
3
VL
ED
_V
CC
1
14
14
1
SE
SE
T_
12
V
VL
ED
_V
CC
2
13
N
C
2
SA
SA
_REF
_L
_L
VL
ED
_V
CC
3
12
12
3
GL
GL
_CT
RL
VL
ED
_V
CC
4
11
11
4
LD
LD
_ERR
N
C
5
N
C
10
5
VL
VL
ED
_GN
D
D
VL
ED
_GN
D
D
6
9
9
6
VL
VL
ED
_GN
D
D
VL
ED
_GN
D
D
7
8
8
7
VL
VL
ED
_GN
D
D
VL
ED
_GN
D
D
8
7
7
8
VL
VL
ED
_GN
D
D
VL
ED
_GN
D
D
9
6
6
9
VL
VL
ED
_GN
D
D
SEN
SE_
GN
D
D
10
5
N
C
10
SA
_REF
_H
_H
LD
_ERR
11
4
4
11
VL
ED
_V
CC
GL
_CT
RL
12
3
3
12
VL
ED
_V
CC
N
C
13
N
C
2
13
VL
ED
_V
CC
REG
12
12
V
14
1
1
14
VL
ED
_V
CC
CN640
2
LD
- C
N200
4
VL
ED
_V
CC
1
1
1
1
VL
VL
ED
_V
CC
VL
ED
_V
CC
2
2
2
2
VL
VL
ED
_V
CC
VL
ED
_V
CC
3
3
3
3
VL
VL
ED
_V
CC
VL
ED
_V
CC
4
4
4
4
VL
VL
ED
_V
CC
N
C
5
N
C
N
C
5
N
N
C
VL
ED
_GN
D
D
6
6
6
6
VL
VL
ED
_GN
D
D
VL
ED
_GN
D
D
7
7
7
7
VL
VL
ED
_GN
D
D
VL
ED
_GN
D
D
8
8
8
8
VL
VL
ED
_GN
D
D
VL
ED
_GN
D
D
9
9
9
9
VL
VL
ED
_GN
D
D
N
C
10
VL
VL
ED
_GN
D
D
MAIN BOARD
POWER SUPPLY BOARD
XBR-85X955B 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
(G3)?
Yes
No
Main Board*
Press power button while
monitoring pin 27
of CN6401 (G3) 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 22
.
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