Sony KD-43X8300C Service Manual ▷ View online
TROUBLE SHOOTING
3-5. NO PICUTURE
No Picture
BL_ON：H
BL_ON (L or H): IC9017 #18pin (for 4K BMFW/BMFL board)
Got Any Normal
Display?
No
Yes
Check Smart Core
Behavior
(5x Blinking)
Yes
Replace
the V by One FFC
Harness
LCD Panel
(T-CON)
NG
Check
BL_ON
on the main board
BL_ON：L
Symptom
improvement
improvement
Replace
the main Board
NG
Symptom
improvement
improvement
No
5x Blinking
Check Other
Portion:
V by One FFC
Harness
improvement
Main board NG
improvement
Backlight
HDMI - No Picture
Ext. Video Input -
No Picture
Tuner - No Picture
101
TROUBLE SHOOTING
3-5-1. No Picture CH/MX/PA/COL/LA (BMFL/BMFW)
No Picture Video
Video 1
N Pi
Video 2
N Pi t
No Picture Video
No Picture
No Picture
Check if input OSD
is GREY OUT
OK if it is highlighted
NG
Check if input OSD
is GREY OUT
OK if it is highlighted
NG
*
Check J7505
Connection,
Connection,
VIDEO2_DET
At R7562
*
Check J7504
Connection,
VIDEO_DET
Connection,
VIDEO_DET
At R7539
NG (Vpp: 0 V)
NG (Vpp: 0 V)
OK
OK
**
Detailed check all
parts at VIDEO2_DET
Signal Path [R7561]
**
Detailed check all
parts at VIDEO_DET
Signal Path [R7535]
OK (Vpp: 3.3 V)
OK (Vpp: 3.3 V)
NG (Vpp: 0 V)
OK (Vpp: 3.3 V)
OK (Vpp: 3 3 V)
NG (Vpp: 0 V)
Check wave between
C7512 and IC1000
Check wave between
C7511 and IC1000
**
Detailed check all parts
at CVBS2P signal path
[D7514/R721/C7521/
R7519/C7534]
OK
NG
**
Detailed check all parts
at CVBS3P signal path
[D7530/R7524/R7525]
OK
NG
OK (Vpp: 1 V)
NG (Vpp: 0 V)
OK (Vpp: 1 V)
NG (Vpp: 0 V)
OK (Vpp: 3.3 V)
Muffin [IC1000]
Problem
Muffin [IC1000]
Problem
J7505 Connectivity
Problem
Parts Broken
J7505 Connector
Problem
J7504 Connectivity
Problem
Parts Broken
J7504 Connector
Problem
OK
OK (Vpp: 1 V)
Problem
Problem
Problem
Problem
Problem
Problem
**
OK Condition : No part short-circuited
NG Condition : Part short-circuited
*
OK Condition : No solder splash can be seen
NG Condition : Solder splash can be seen
102
NG Condition : Part short circuited
G Co d o
So de sp as ca be see
[All voltage measurement using Oscilloscope]
TROUBLE SHOOTING
3-5-2. No Picture : @ Tuner
Notes:
I2C line for all tuners except Japan SKP
I2C line for all tuners except Japan SKP
p
p
_
- Parts for I2C_A_SDA line: R6001, C6004.
- Parts for I2C_A_SCL line: R6002, C6005.
- Parts for I2C_A_SCL line: R6002, C6005.
I2C line for Japan_SKP
- Parts for I2C_D_SDA line: R6003,C6006
- Parts for I2C_D_SCL line: R6004,C6007
- Parts for I2C_D_SDA line: R6003,C6006
- Parts for I2C_D_SCL line: R6004,C6007
RF input no picture / noisy picture
Change RF cable and antenna
NG
Check RF source cable
and antenna, OK?
TU_1.1V line only in Japan_SKP Tuner
- Parts for TU_1.1V: FB6800
- Parts for TU_1.1V: FB6800
OK
NG
Check Tuner power line:
3.3V at JL6005 = 3.3V?
1.8V at JL6006 = 1.8V?
1.8V at JL6006 = 1.8V?
DEM_3.3V at JL6019 = 3.3V?
Please refer DDCON
troubleshooting
OK
_
A_RESET value at JL6012 = 3.3V?
For JP_SK only – TU1.1 V (Refer notes)
All broadcasting channel
YES
Check part mounting condition
for “I2C_A_SDA, I2C_A_SCL
or
Change NG parts
NG
g
cannot be received?
NO
or
I2C_D_SDA, I2C_D_SCL”
Refer Note I2C
connected to I2C bus
OK
Digital
Analog
Digital
Check Tuner power line
12V at JL6027 = 12V?
Satellite
NG
12V LNB Voltage
Checking
Terrestrial/Cable
OK
For TW & NA-ATSC
(MX/UC) only
(MX/UC) only
All tuners except
TW & NA-ATSC(MX/UC)
TW & NA-ATSC(MX/UC)
103
Refer Analog Tuning
Refer Digital Tuning 1
Refer Digital Tuning 2
TROUBLE SHOOTING
3-5-3. No Picture : HDMI1
No Picture
Check other
Other Input is OK
Check the below point at
Connector side
・Check +5V line
All lines
are NG
Replace
Change B Board
If you can do
component repair
component repair
HDMI input
All Inputs are NG
Check Picture by other TV set
・Check HPD line
・Check DDC lines
・Check TMDS lines
Only +5V line
is NG
Spec:4.7~5.3V
+5V line is OK
and HPD line
and HPD line
is NG
Only TMDS
lines
lines
are NG
p
CN5202
NG
Ch
B B
d
Change B-Board.
y
which is same model
Spec:4.7 5.3V
Replace
R5515
Spec:2.4~5.3
V
V
Only DDC
lines
lines
are NG
Target board & other TV set
both NG
Other TV set
OK
OK
Connect Source
Replace
JC5216, JC5217
RB5209, RB5210
NG
Change B-Board.
If you can do
component repair
component repair
Check Source equipment
b R f
TV
t
Is Distributor used ?
No
Yes
Connect Source
equipment directly
Ch
B B
d
Replace IC5212
Replace IC5212
(HDMI EQ).
Reference TV set
NG
NG
by Reference TV set
(For example, RB1)
Check the settings of
Reference TV Set OK
Replace
IC1000
JC5227 JC5228 JC5235 JC5236
Change B-Board.
p
(HDMI EQ).
g
Source equipment
JC5227, JC5228, JC5235, JC5236
JC5241, JC5242, JC5243, JC5244
104
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