Sony KDL-55HX827 Service Manual ▷ View online
KDL-55HX827 35
SECTION 5 - FLOW CHARTS AND DIAGRAMS
No Power
Is standby LED
blinking?
No
Yes
No
See protection
flowchart
Yes
Is energy
Saving switch on
side of unit turned
off?
Does red standby
LED on front panel
light?
High (3.3V)
on pin 7 of CN6151
on power supply?
Yes
No
Main Board
Yes
Turn switch on
No
ENERGY SAVING
SWITCH
Press power
button while
monitoring pin 1
of CN6151 on
power supply
board
High (3.3V)
on pin 1 of CN6151
on power supply?
Yes
No
Power Supply
Board
Power Supply
Board
Power Supply
Board
FIGURE 5-2. NO POWER FLOWCHART
KDL-55HX827 36
SECTION 5 - FLOW CHARTS AND DIAGRAMS
STANDBY LED BLINKING
Protect
Shutdown.
Standby LED
Blinking
No
Yes
G6 Board
No
Yes
2X
Main Board
3X
4X
No
Yes
5X
Yes
6X
No
7X
Imediately
LCD Panel
TCON
LCD Panel
Yes
No
After a while
Main Board
Check ventilation
G7 Board
10X
HEM2 Board
FIGURE 5-3. PROTECTION SHUTDOWN FLOWCHART
KDL-55HX827 37
SECTION 5 - FLOW CHARTS AND DIAGRAMS
NO PICTURE
No Video
Backlights
turned on?
Unplug LVDS
connector with
unit off. Turn unit
back on
Test
patterns
display on
screen?
Yes
No
TCON
(LCD Panel)
Sony logo
appears
momentarily?
No
Main Board
No
TCON
(LCD Panel)
Yes
Yes
Main Board
FIGURE 5-4. NO VIDEO FLOWCHART
KDL-55HX827 38
SECTION 5 - FLOW CHARTS AND DIAGRAMS
Video Distortion
Is distortion
across entire
screen?
Any horizontal
lines?
No
No
Yes
Yes
Improper or
missing colors?
Yes
Main Board
No
Vertical lines
or bars?
No
Yes
Lines
move when
wide-mode
changed?
Yes
No
TCON
(LCD Panel)
Main Board
LCD Panel
Any single or
isolated vertical
lines?
Yes
LCD Panel
More than 1
vertical band?
No
Yes
TCON
(LCD Panel)
FIGURE 5-5. VIDEO DISTORTION
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