Sony KDL-32HX755 / KDL-40HX755 / KDL-46HX755 / KDL-55HX755 Service Manual ▷ View online
KDL-32HX755/40HX755/46HX755/55HX755 12
SECTION 3 - FLOW CHARTS AND DIAGRAMS
NO POWER
+OUT1
+OUT2
NC
NC
1
2
3
4
2
3
4
DC_DIMMER
BLINKING
PWM_DIMMER
BL_ERR
1
2
3
4
2
3
4
BL_ON
GND
DIGITAL_STBY
AU_GND
5
6
6
7, 8
9~12
REG12V
TCON_ON
AU_12V
STBY3.3V
13,14
17, 18
19
CN6601
CN6205
TCON_VCC
AUDIO_GND
AU_12V
REG12V
1
2, 4
3, 5
3, 5
12, 8
AUDIO_12V
STBY3.3V
7, 9
10
BLINKING
DIGITAL_STBY
POWER_ON
PWM_DIMMER
DC_DIMMER
CN6001
TO LED
BACKLIGHTS
BAPS
GL7
-OUT1
-OUT2
NC
NC
1
2
3
4
2
3
4
CN6602
AC_OFF_DET
POWER_ON
26
27
28
27
28
23
TCON_VCC
12
13
14
15
16
17
18
19
20
13
14
15
16
17
18
19
20
BL_ON
BL_ERR
AC_OFF_DET
TCON_ON
GL6
GL2
POWER AND CONTROL BLOCK DIAGRAM
KDL-32HX755/40HX755/46HX755/55HX755 13
SECTION 3 - FLOW CHARTS AND DIAGRAMS
No Power
Is standby LED
blinking?
No
Yes
No
See
Protection Shutdown
flowchart
Yes
Does red standby
LED on front panel
light?
High (>2.5V)
on pin 27 of CN6205
on power supply?
Yes
No
Main Board*
Press power
button while
monitoring pin 28
of CN6205 on
power supply
board
High (3.3V)
appears
momentarily?
Yes
No
Power Supply
Board*
Power Supply
Board*
Power Supply
Board*
Remove AC power and
wait at least 30
seconds before
reapplying
NO POWER FLOWCHART
*For Part Number information, Refer to
“Section 4 - Disassembly/Part Number Information” on page 18
.
KDL-32HX755/40HX755/46HX755/55HX755 14
SECTION 3 - FLOW CHARTS AND DIAGRAMS
STANDBY LED BLINKING
Protect
Shutdown.
Standby LED
Blinking
No
Yes
Power Supply
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
10X
HEM3 Board
Power Supply
Board*
8X
See Resolving an
8x Error
10X
3D IR Emitter
Board*
PROTECTION SHUTDOWN FLOWCHART
*For Part Number information, Refer to
“Section 4 - Disassembly/Part Number Information” on page 18
.
KDL-32HX755/40HX755/46HX755/55HX755 15
SECTION 3 - 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
Yes
Yes
Main Board*
Locate
CN6205 on
Power
Supply Board
Zero volts at
Pin 2?
TCON
(LCD Panel)*
Yes
No
Zero volts at
Pin 4?
Yes
Main Board*
No
LCD Panel*
NO VIDEO FLOWCHART
*For Part Number information, Refer to
“Section 4 - Disassembly/Part Number Information” on page 18
.
Click on the first or last page to see other KDL-32HX755 / KDL-40HX755 / KDL-46HX755 / KDL-55HX755 service manuals if exist.