Sony KE-32TS2E / KE-32TS2U Service Manual ▷ View online
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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.)
on, the screen becomes
black immediately or after a
few seconds. (Main power
is turned off.)
X-SUS
Y-SUS
Panel chassis
LOGIC
ABUSL
ABUSR
Refer to
Chapter 4.6.1
2
Entire screen
does not light.
Screen lights dimly even on
the back screen.
LOGIC Replace
LOGIC board
3
Single vertical line (of
different color)
Panel chassis
LOGIC
Refer to
Chapter 4.6.2
4
Vertical line
Vertical line from the
middle of effective scan
area (Vertical line of
different color)
middle of effective scan
area (Vertical line of
different color)
Panel chassis Replace panel
chassis
5
Bar width of 1/7 of
horizontal size or in
multiples of 1/7, is
displayed. Abnormal
display.
horizontal size or in
multiples of 1/7, is
displayed. Abnormal
display.
Panel chassis
ABUSL
ABUSR
LOGIC
Above boards
are connected
.
Refer to
Chapter 4.6.2
6
Vertical bar
Bar width of 3/7 or 4/7 of
the screen width, is
displayed. Abnormal
display. (Vertical line of
different color)
the screen width, is
displayed. Abnormal
display. (Vertical line of
different color)
ABUSL
ABUSR
LOGIC
Above boards
are connected.
Refer to
Chapter 4.6.2
7
Single horizontal line (No
light) Or single horizontal
line does not light among
the effective scanning area.
Single horizontal line does
not light.
light) Or single horizontal
line does not light among
the effective scanning area.
Single horizontal line does
not light.
Panel chassis Replace panel
chassis
8
Horizontal
line
Occurrence by one line(No
light) ,full screen
light) ,full screen
X-SUS
Y-SUS
Replace
X-SUS
Y-SUS
Y-SUS
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NO
Fault contents
Fault status
Suspected
fault
location
Analysis
procedure
and measure
9 Horizontal
bar
Bar width of 1/8 or
multiples of 1/8 of the
screen height, is displayed.
multiples of 1/8 of the
screen height, is displayed.
Abnormal (Screen does not
light)
Panel chassis Replace panel
chassis
10
Bar width of 1/2 of the
screen height.
Abnormal display
(Screen does not light)
screen height.
Abnormal display
(Screen does not light)
Panel chassis
Y-SUS
X-SUS
X-SUS
Above boards
are connected.
Refer to
Chapter 4.6.3
11 Image burn-in Fixed display contents are
always displayed.
Panel
chassis
Perform all
white heat run.
After
judgment,
replace panel
chassis
12 Stains
Oval-shaped
points
having
abnormal luminance are
scattered in the upper or
lower part of screen.
scattered in the upper or
lower part of screen.
Panel
chassis
Perform all
white heat run.
After
judgment,
replace panel
chassis
13 Flicker
The entire screen flickers
continuously.
continuously.
Connector
Reconnecting
of connector
and cable, or
exchanges the
cable.
14 Chrominance
is abnormal
Colors cannot be displayed
correctly.
correctly.
LOGIC
Replace
LOGIC board
15 Sync
is
disturbed
LOGIC
Replace
LOGIC board
18 Picture
distorted
LOGIC
Replace
LOGIC board
19 Steps
of
gradation are
skipped
skipped
Luminance linearity is poor.
LOGIC
Replace
LOGIC board
ABCDEFG
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NO
Fault contents
Fault status
Suspected
fault
location
Analysis
procedure
and measure
20 Abnormal
sound
PSU
X-SUS
Y-SUS
Y-SUS
(Core is broken,
or transformer
is abnormal.)
Locate cause
of abnormality
from listening
and viewing.
Replace the
cause of
problem.
21 Control
on
external
communicatio
n is abnormal
communicatio
n is abnormal
Contrast, color temperature
adjustment and
adjustment and
ϒ cannot be
changed.
LOGIC
Replace
LOGIC board
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4.6 Problem Analysis Procedure
4.6.1 "The entire screen does not light (Main power is turned off)” problem analysis
procedure
The entire screen does not light.
(Main power is turned off.)
PC for analysis
C
onnected?
Analysis using PC
Chapter 4.7
Turn on AC power.
PSU board Vpr2
(3.3V) exists?
PSU board is
defective.
Y
Y
N
N
Turn off the AC power.
Remove the following power connectors
(4 locations):
(4 locations):
CN 23 (X-SUS）
CN 33 (Y-SUS)
CN 42 (ABUSR)
CN 52 (ABUSL)
CN 33 (Y-SUS)
CN 42 (ABUSR)
CN 52 (ABUSL)
Turn off AC power.
Connect CN 6 (LOGIC).
Turn on AC power
Remove CN6 (LOGIC)
PSU board
Vpr2 (3.3V) exists?
LOGIC board is
defective.
N
Y
Turn off the AC
power.
End of analysis
STANDBY power
supply has
abnormality.
supply has
abnormality.
STANDBY power supply (MPU
power supply) system has
short-circuit.
power supply) system has
short-circuit.
1
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