Sony KDL-32EX725 / KDL-46EX725 Service Manual ▷ View online
KDL-32EX725/46EX725/55EX725 39
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-32EX725/46EX725/55EX725 40
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-32EX725/46EX725/55EX725 41
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
Yes
No
Replace
Main Board
Replace
TCON Board
Replace
Power Supply
Board
Unit Shuts OFF
RED LED
Blinking
Is 3V
Present ?
FIGURE 5-6. 5 BLINK ERROR
KDL-32EX725/46EX725/55EX725 42
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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