Sony KDE-55XBR950 (serv.man2) Service Manual ▷ View online
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Photo 4.3
＜
State of initialization＞
PDPgo switch
ON
OFF
CN2
CN1
CN7
CN5
Select switch of Display size,
Synchronous, and Clock signal
Synchronous, and Clock signal
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4.5 FAULT SYMPTOM
NO Fault
contents
Fault status
Suspected
fault location
Analysis
procedure
and
measure
1
After momentarily going on, the
screen becomes black
immediately or after a few
seconds. (Main power is turned
off.)
screen becomes black
immediately or after a few
seconds. (Main power is turned
off.)
X-SUS,Y-SUS
PSU, Panel
chassis, Logic
ABUSL or R
PSU, Panel
chassis, Logic
ABUSL or R
Refer to
Chapter
4.6.1
Chapter
4.6.1
2
Entire screen
does not light.
does not light.
Screen lights dimly even on the
back screen.
back screen.
Logic Replace
Logic
board
board
3
Single vertical line (of different
color
color
)
start point at center of
screen
Panel chassis
Logic, ABUS,
ADM
Logic, ABUS,
ADM
Refer to
Chapter
4.6.2
Chapter
4.6.2
4
Single vertical line (of different
color
color
)
start point exclude at
center of screen
Panel chassis
Replace
Panel
chassis
5
Vertical line
Single full vertical line (of different
color
color
)
Logic Replace
Logic
board
6
Vertical bar
Bar width of 1/33 of horizontal
size or abnormal display in
multiples of 1/33.
size or abnormal display in
multiples of 1/33.
Panel chassis
(ADM)
Refer to
Chapter
Chapter
4.6.2
7
Abnormal display at bar width of
1/11 of horizontal size or
1/11 of horizontal size or
multiples of 1/11
.
.
Panel chassis
ABUS
Connection of
above boards.
8
Abnormal display at bar width of
1/11 of horizontal size (Vertical
bar of different color)
1/11 of horizontal size (Vertical
bar of different color)
Connection of
ADM,
ABUS
Refer to
Chapter
Chapter
4.6.2
9
Abnormal display at bar width of
2/11 of horizontal size (Vertical
bar of different color)
2/11 of horizontal size (Vertical
bar of different color)
Connection of
ABUS
10
Abnormal display at bar width of
2/11 of horizontal size (Vertical
bar of different color)
2/11 of horizontal size (Vertical
bar of different color)
Connection of
ABUS
11
Abnormal display at upper side
or lower side of horizontal size
(Vertical bar of different color)
or lower side of horizontal size
(Vertical bar of different color)
Connection of
ABUS and
Logic or
X-SUS and
ABUS
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NO
Fault contents
Fault status
Suspected
fault location
Analysis
procedure and
measure
12
One hall horizontal line
does’nt light or one horizontal
line does not light from the
effective scan area.
does’nt light or one horizontal
line does not light from the
effective scan area.
Panel
chassis
(SDM)
Replace Panel
chassis
13
Horizontal line
Every other line does’nt light
on entire screen.
on entire screen.
X-SUS
Y-SUS
ABUS-D2
ABUS-D3
ABUS-D3
Replace
X-SUS/Y-SUS
ABUS-D2
ABUS-D3
ABUS-D3
14
Abnormal display (or no
display) at bar width of 1/12 of
vertical size or multiples of
1/12
display) at bar width of 1/12 of
vertical size or multiples of
1/12
Panel chassis
(SDM)
Replace Panel
chassis
15
Horizontal bar
Abnormal display (or no
display) at bar width of 1/2 of
vertical size or multiples of
1/2
display) at bar width of 1/2 of
vertical size or multiples of
1/2
Panel chassis
Y-SUS
X-SUS
Connection of
board
Refer to
Chapter 4.6.3
16
Image sticking Fixed display contents are
always displayed.
Panel chassis
Judge after
operating test
on full white
display,
Replace Panel
chassis
17
Stains
Oval-shaped points having
abnormal luminance are
scattered in the upper or
lower part of screen
abnormal luminance are
scattered in the upper or
lower part of screen
Panel chassis
Judge after
operating test
on full white
display,
Replace Panel
chassis
18 Twinkle
The entire screen
momentarily becomes
brighter or darker
momentarily becomes
brighter or darker
19
Flicker
The entire screen flickers
continuously
continuously
Poor
connector
contact
(CN1,2)
Connector /
cable
re-connection
or cable
exchange
20 Luminance
is
abnomal
Screen is too dark or too
bright (out of specifications)
bright (out of specifications)
21 Chrominance
is
abnomal
Colors cannot be displayed
correctly
correctly
Logic
Replace logic
board
22 Synchronization
is disturbed
Logic
Replace logic
board
ABCDEFG
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NO
Fault contents
Fault status
Suspected
fault
location
Analysis
procedure and
measure
23
Picture
distorted
distorted
Logic
Replace logic
board
24
Steps of
gradarion are
skipped
gradarion are
skipped
Luminance linearity is
poor
poor
Logic
Replace logic
board
25
Abnormal
sound
sound
PSU
X-SUS
Y-SUS
Panel
Abnormal
locations are
exchanged
26
External
communication
is abnormal
communication
is abnormal
Adjustment and γ
cannrot be changed
cannrot be changed
Logic
Replace logic
board
27
No light after
abnormal
display
abnormal
display
Brightly and random
display, and it becomes
no light afterwards.
display, and it becomes
no light afterwards.
Y-SUS
Replace Y-SUS
board
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