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DOWNLOAD Sony KDL-32EX720 / KDL-32EX723 / KDL-40EX720 / KDL-40EX723 / KDL-46EX720 / KDL-46EX723 / KDL-55EX720 / KDL-55EX723 Service Manual ↓ Size: 7.99 MB | Pages: 112 in PDF or view online for FREE

Model
KDL-32EX720 KDL-32EX723 KDL-40EX720 KDL-40EX723 KDL-46EX720 KDL-46EX723 KDL-55EX720 KDL-55EX723
Pages
112
Size
7.99 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / SERVICE TRAINING MANUAL
File
kdl-32ex720-kdl-32ex723-kdl-40ex720-kdl-40ex723-kd.pdf
Date
PREV: Sony KDL-40NX720 / KDL-46NX720 / KDL-55NX720 / KDL-60NX720 (serv.man2) Service Manual

Sony KDL-32EX720 / KDL-32EX723 / KDL-40EX720 / KDL-40EX723 / KDL-46EX720 / KDL-46EX723 / KDL-55EX720 / KDL-55EX723 Service Manual ▷ View online

KDL-32EX720/32EX723/40EX720/40EX723/46EX720/46EX723/55EX720/55EX723 47
SECTION 5 - FLOW CHARTS AND DIAGRAMS
3X Blink Pattern
Audio Error
Yes
Check 
Speakers & 
Connections
Do 
Speakers 
Measure 
8 ohms ?
No
Replace 
Speaker(s)
Check AU12V
*Before Shutdown
Is voltage 
12V
Present ?
No
Yes
Replace 
Power Supply 
Board
Replace 
Main Board
Unit Shuts OFF
RED LED 
Blinking
FIGURE 5-4.  3 BLINK ERROR
KDL-32EX720/32EX723/40EX720/40EX723/46EX720/46EX723/55EX720/55EX723 48
SECTION 5 - FLOW CHARTS AND DIAGRAMS
4X Blink Pattern
(Balancer Error)
Unit Shuts OFF
RED LED 
Blinking
Is 4X still 
occuring?
Replace 
LCD Panel 
Assembly
Replace 
Main Board
No
Yes
Problem 
Solved
FIGURE 5-5.  4 BLINK ERROR
KDL-32EX720/32EX723/40EX720/40EX723/46EX720/46EX723/55EX720/55EX723 49
SECTION 5 - FLOW CHARTS AND DIAGRAMS
5X Blink Pattern
TCON/HFR Error
Is 
connection 
OK?
Repair 
Connection
No
Yes
Check LVDS connection 
between 
LCD Panel (TCON) & BATV Brds 
Check 
TCON 12V supply 
Is 
12V Present?
No
Yes
Check TCON ON 
Signal
Is 
3V Present?
Yes
No
Replace 
Main Board
Replace 
TCON Board
Replace 
Power Supply 
Board
Unit Shuts OFF
RED LED 
Blinking
FIGURE 5-6.  5 BLINK ERROR
KDL-32EX720/32EX723/40EX720/40EX723/46EX720/46EX723/55EX720/55EX723 50
SECTION 5 - FLOW CHARTS AND DIAGRAMS
Are 
all voltage 
Present ?
Yes
No
Is 
Backlight ON 
Before Shut 
Down?
Yes
No
Yes
No
Replace 
LCD Panel 
Assembly
Check LED-ON to LD-Board
*Before Shutdown
Is 
voltage 
3V Before 
Shutdown ?
Yes
No
Is “SONY” logo 
Displayed and 
Tones Heard?
Check Dimmer signal 
*Before Shutdown
Is 
voltage 
1V to 3V Before 
Shutdown?
Check for 
Short
6X Blink Pattern
(Backlight Error)
Is 
Issue 
Resolved?
Issue 
Resolved
Replace 
LCD Panel 
Assembly
Check +109V & -70V 
LED Supplies
*Before Shutdown
Replace 
Main Board
Replace 
Power Supply 
Board
Replace 
Main Board
Unit Shuts OFF
RED LED 
Blinking
Check 24V to LD-Board
*Before Shutdown
Is 
voltage 
24V Before 
Shutdown?
No
Yes
Replace 
LD-Board
Yes
No
Replace 
TCON-Board
FIGURE 5-7.  6 BLINK ERROR
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