Sony KDL-32EX421 / KDL-32EX520 / KDL-32EX521 / KDL-32EX523 / KDL-40EX520 / KDL-40EX521 / KDL-40EX523 / KDL-46EX520 / KDL-46EX521 / KDL-46EX523 Service Manual ▷ View online
KDL-32EX421/32EX423/32EX520/32EX521/32EX523/40EX520/40EX521/40EX523/46EX520/46EX521/46EX523 39
SECTION 5 - FLOW CHARTS AND DIAGRAMS
Power Error
Is
“Standby” LED
illuminate steady
RED?
Does the
“Power” LED
Light Green?
No
Yes
No
Press Remote
Power Button
Initial Power-ON OK
Troubleshoot Video,
Backlight, Panel, or Audio
Problem
Check
STBY 3.3V
(In STBY Mode)
Confirm TV is
securely plugged into
an
Active AC Outlet
Is
110VAC Present
at
CN6001?
Repair AC Outlet or
Replace AC-Power Cord
OK
Yes
Check Main Fuse
F6101
Is
voltage
3.3V
Present?
Yes
Is Fuse
Open?
No
Yes
No
Replace
Main Board
Replace
Power Supply
Board
Replace
Power Supply
Board
Check
AC-OFF-Detect
(In STBY Mode)
Is
voltage
3.3V
Present?
Replace
Power Supply
Board
No
Yes
Press TV
Power Button
Does the
“Power” LED
Light?
Yes
No
Replace
Remote Batteries or
Remote
Replace
Main Board
No
Yes
FIGURE 5-2. NO POWER FLOWCHART
KDL-32EX421/32EX423/32EX520/32EX521/32EX523/40EX520/40EX521/40EX523/46EX520/46EX521/46EX523 40
SECTION 5 - FLOW CHARTS AND DIAGRAMS
STANDBY LED BLINKING
Protect
Shutdown.
Standby LED
Blinking
No
Yes
No
Yes
2X
BATV Board
3X
4X
No
No Backlight
5X
Yes
6X
No
7X
Imediately
Shuts Down
BATV Board
TCON Board
LCD Panel
Yes
No
After a while
Shuts Down
BATV Board
Check
ventilation
GE2 Board (32")
GE3 Board (40")
GE3 Board (46")
BATV Board
FIGURE 5-3. PROTECTION SHUTDOWN FLOWCHART
KDL-32EX421/32EX423/32EX520/32EX521/32EX523/40EX520/40EX521/40EX523/46EX520/46EX521/46EX523 41
SECTION 5 - FLOW CHARTS AND DIAGRAMS
NO PICTURE OR SOUND
BATV
IC9000
X-Reality
(HDCP)
LCD Panel Assembly
TCON
(60Hz)
LCD
Panel
LED Backlight
System
CN2001
NAND FLASH
User Data
White Balance
GAMMA
User Menu (XMB)
Service Mode
LCD Panel
LVDS Cable
RF Input
Video 2
(Component / Composite)
Video 1 (Composite)
PC Input
HDMI IN 1
(ARC)
HDMI IN 2
HDMI IN 3
IC5500
HDMI
Switch
&
EQ
(EDID)
RJ45 (Ethernent)
USB 2.0
HDMI IN 4
IC1404
NTSC/ATSC
Tuner IC
14
/
42
Digital Video
Interface
Interface
USB 2.0
Interface
R
L
F4200
IC4601
Output
Amplifier
LR
Audio
CN4602
AU12V
Headphone/Analog
Audio Output
Digital Audio
Output (Optical)
SPDIF
CN2700
J2702
IC4502
OPAMP
LR
Audio
Video
Audio
Video
Audio
Video
Video
Audio
Video
Video
Audio
Video
Audio
Video
Audio
Video
Video
Audio
Video
Video
Audio
To HDMI 1 for
ARC Output
From SPDIF Output
(Optical)
FIGURE 5-4. VIDEO/AUDIO PROCESSING DIAGRAM
KDL-32EX421/32EX423/32EX520/32EX521/32EX523/40EX520/40EX521/40EX523/46EX520/46EX521/46EX523 42
SECTION 5 - FLOW CHARTS AND DIAGRAMS
Missing or
Distorted Video
Is
Video Missing or
Distorted on
All
Inputs?
No
Yes
No
Can
User Menu be
Displayed?
No
Is
Video
Missing or
Distorted?
Missing
Distorted
Is
Single Pixels
or
Complete Line
of Pixels
missing?
Yes
No
Yes
Is
Distortion
Present in
User Menu
OSD?
No
Yes
Is
External Device
& connection
OK?
Repair External
Device
Check
External Device
and Connections
Swap Devices and
connections
Skew (or Rock) the LVDS
connector from its socket
at the TCON Brd.
Are Flashes
of color
displayed?
Yes
No
Check LVDS cable
for Physical Damage
Replace
LCD Panel
Replace
TCON Board
Replace
LVDS Cable
Yes
Sharp Horizontal
or Vertical Lines
Cable OK
Does
Distortion follow
picture size
when changing
WIDE mode?
Perform WIDE Mode Test
Replace
TCON Board
No
Yes
Replace
Main Board
Replace
Main Board
Replace
Main Board
Replace
Main Board
Replace
Main Board
NG
FIGURE 5-5. NO VIDEO FLOWCHART
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