Sony KDL-40NX725 / KDL-46NX725 Service Manual ▷ View online
KDL-40NX725/46NX725
28
SECTION 3 - CHASSIS OVERVIEW
(Only Interface between board and board
NC
1
12V
NC
2
12V
NC
3
GND
D
N
G
4
C
N
SM04B-PASS-TBT(LF)(SN)
1
1
-
0
6
4
-
9
1
8
-
1
V
2
1
1
1
V
2
1
2
2
D
N
G
3
3
D
N
G
4
4
L
R
T
C
_
S
L
G
5
5
2
L
R
T
C
_
S
L
G
6
6
1
D
N
G
L
I
A
F
_
I
M
E
7
7
2
X
T
_
D
T
R
A
U
C
N
8
8
3
X
R
_
D
T
R
A
U
B
T
-
S
H
G
-
B
8
0
M
S
T
S
J
4
T
E
S
E
R
STBY_+3.3V
STBY_+3.3V
5
MODE_TVM
6
1
1 VLED_VCC
UARTA_RX
7
2
2 VLED_VCC
NC (MD2)
8
3
3 VLED_VCC
UARTC_RX
9
4
4 VLED_VCC
UARTC_TX
10
NC 5
5 NC
GND
11
6
6 VLED_GND
2
1
X
T
_
A
T
R
A
U
V
3
.
3
+
_
Y
B
T
S
0
1
0
1
7
7 VLED_GND
12
3
1
X
I
R
T
A
M
_
S
C
E
V
5
.
2
1
+
O
I
D
U
A
9
8
8 VLED_GND
4
1
V
3
.
3
+
_
Y
B
T
S
V
5
.
2
1
+
O
I
D
U
A
8
4
1
9
9 VLED_GND
11
5
1
M
E
P
_
E
D
O
M
D
N
G
_
V
5
.
2
1
+
O
I
D
U
A
7
Connect 10
10 VLED_GND
6
1
X
R
_
G
O
L
_
M
E
P
D
N
G
_
V
5
.
2
1
+
O
I
D
U
A
6
3
1
11
11 LD_ERR
15
7
1
X
T
_
G
O
L
_
M
E
P
D
N
G
_
V
5
.
2
1
+
G
E
R
5
NC 12
12 NC
8
1
D
N
G
D
N
G
_
V
5
.
2
1
+
G
E
R
4
7
1
Connect 13
13 GL_CTRL
4
0
0
9
N
C
V
5
.
2
1
+
G
E
R
3
6
1
14
14 LED_ON
1
5
-
7
6
6
-
4
7
7
-
1
V
5
.
2
1
+
G
E
R
2
8
1
P
8
1
C
P
F
/
C
F
F
,r
o
t
c
e
n
n
o
C
1
X
E
-
L
T
C
C
V
_
N
O
C
-
T
1
4
2
CN6001
1-821-620-11
HEADER ASSEMBLY FOR PWB 10P
1-821-620-11
HEADER ASSEMBLY FOR PWB 10P
7
9
AC_OFF_DET
1
8
POWERON
6
7
BL_ERR
NC
6
NC
NC
5
NC
NC
4
NC
N
O
_
N
O
C
T
3
8
1
1
V
2
1
2
2
V
2
1
r
e
tt
i
m
E
D
3
3
2
PFC_PWR
3
3
D
N
G
V
-
a
3
9
1
GND
4
4
D
N
G
CN6002
GLS_CTRL
5
5
1-842-559-11
GLS_CTRL2
6
6
EMI_FAIL
7
7
8
8
8
C
N
1-821-135-11
1-821-135-11
CN6151
SJM20-28WLB
)
6
0
1
0
0
1
(
d
r
a
o
b
B
o
T
W
A
5
G
T-CON_Vcc12V
28
NC
GND
27
NC
T-CON_VCC12V
26
NC
GND
25
NC
T-CON_VCC_12V To B
24
1
GND
23
NC
BDR_ASU_12V
22
NC
GND
21
NC
BDR_ASU_12V
20
NC
GND
19
NC
REG12V
18
2
GND
17
4
REG12V
16
3
GND
15
5
AU_12V
14
8
AU_GND
13
6
AU_12V
12
9
AU_GND
11
7
STBY3.3V
10
10
GND
9
1
T-CON_ON
8
3
AC_OFF_DET
7
9
BL_ERR
6
7
NC
5
NC
NC
4
NC
PFC_ON
3
2
NC
2
NC
POWER_ON
1
8
VLED_VCC
1
1
VLED_VCC
2
2
VLED_VCC
3
3
VLED_VCC
4
4
NC
5
5
VLED_GND
6
6
VLED_GND
7
7
VLED_GND
8
8
VLED_GND
9
9
VLED_GND
10
10
LD_ERR
11
11
NC
12
12
GL_CTRL
13
13
LED_ON
14
14
CN6801
1-822-339-11
JST XA 14P
JST XA 14P
AC_IN
AC-N
AC-N
1
1
AC-L
2
2
CN6001
SFP79-02WLB JAM
1-822-908-11
SFP79-02WLB JAM
1-822-908-11
Energy_Saving_SW
AC(N)-IN
AC(N)-IN
1
1
AC(L)-IN
2
2
CN6002
SFP79-02WLB JAM
1-822-908-11
1-822-908-11
Energy_Saving_SW
AC(L)-OUT
AC(L)-OUT
1
1
AC(N)-OUT
2
2
CN6003
SFP79-02WLB JAM
1-822-908-11
1-822-908-11
HEM2 Board
T-con Board (PEL3)
TC-EM Harness
PEL3-HEM2
LD Board
LD board
BAT-L board
TL-EX1JIG board
ES SW
B board
T-con
Option
T-con
B board
AC pigtail
FIGURE 3-8. KDL-46NX725 CONNECTOR DIAGRAM (2 OF 2)
KDL-40NX725/46NX725
29
OVERVIEW
This chapter provides information regarding the Self Diagnosis
feature in our TVs.
UPDATING THE SOFTWARE
As mentioned in
“Section 2 - Software Requirements” on page 15
there
are several issues that may be resolved by updating the software
to the latest version. For a list of possible correctable issues see
“Checking the Software Version” on page 16
.
SECTION 4 - TROUBLESHOOTING
Self Diagnosis
Supported model
KDL-40NX725/46NX725
30
SECTION 4 - TROUBLESHOOTING
TRIAGE CHART
Use this general Triage Chart to determine what may possibly be causing the error before going out to the customers location.
Before you make the service call…
1. Confirm the symptom from the customer.
2. Select that symptom from the chart.
▲
3. Bring the primary component listed for that symptom.
3D LAN Power
Audio
2X 3X 4X*
4X** 5X 6X 7X 10X
No
WIFI
Dead set
No Video
Whole
Screen
Distortion
Isolated
Area
Distortion
No 3D
No Audio
Main Board
*
▲
▲
▲
Power Supply
▲
HEM2
LD
LCD Panel
TCON
WLAN
4. Follow the associated flowcharts in the Training Manual to isolate the board.
Board Reference
Protection Modes
* Immediate Shutdown After Power ON & 7X
4X** No Backlight before Shut OFF
BLUE Triangle: (Secondary) Possible defective part
5. Chart Color Code
RED DOT: (Primary) Most likely defective part
*NOTE: REFER TO LCD PANEL SERVICE MANUAL IN
REFERENCE LIBRARY DATABASE FOR CORRECT
REPLACEMENT PARTS BASED ON SERIAL NUMBER.
▲*
Sharp Vertical or Horizontal Lines, Missing Pixels
4X* Momentary Backlight before Shut OFF
Video
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