DOWNLOAD Sony KDL-40HX750 / KDL-46HX750 / KDL-46HX751 / KDL-55HX750 / KDL-55HX751 Service Manual ↓ Size: 2.01 MB | Pages: 54 in PDF or view online for FREE

Model
KDL-40HX750 KDL-46HX750 KDL-46HX751 KDL-55HX750 KDL-55HX751
Pages
54
Size
2.01 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kdl-40hx750-kdl-46hx750-kdl-46hx751-kdl-55hx750-kd.pdf
Date
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Sony KDL-40HX750 / KDL-46HX750 / KDL-46HX751 / KDL-55HX750 / KDL-55HX751 Service Manual ▷ View online

KDL-40HX750/46HX750/46HX751/55HX750/55HX751 12
SECTION 3 - FLOW CHARTS AND DIAGRAMS
NO POWER
+OUT1
+OUT2
NC
NC
1
2
3
4
DC_DIMMER
BLINKING
PWM_DIMMER
BL_ERR
1
2
3
4
BL_ON
GND
DIGITAL_STBY
AU_GND
5
6
7, 8
9~12
REG12V
TCON_ON
AU_12V
STBY3.3V
13,14
17, 18
19
CN6601
TCON_VCC
AUDIO_GND
AU_12V
REG12V
1
2, 4
3, 5
12, 8
AUDIO_12V
STBY3.3V
7, 9
10
BLINKING
DIGITAL_STBY
POWER_ON
PWM_DIMMER
DC_DIMMER
CN6001
 LED 
BACKLIGHTS
BAPS
-OUT1
-OUT2
NC
NC
1
2
3
4
CN6602
AC_OFF_DET
POWER_ON
26
27
28
23
TCON_VCC
12
13
14
15
16
17
18
19
20
BL_ON
BL_ERR
AC_OFF_DET
TCON_ON
CN6401
MAIN BOARD
POWER SUPPLY/
CONVERTER
GL7 (55")
GL6 (40”/ 46")
POWER AND CONTROL BLOCK DIAGRAM
KDL-40HX750/46HX750/46HX751/55HX750/55HX751 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 CN6401 
on power supply?
Yes
No
Main Board*
Press power 
button while 
monitoring pin 28 
of CN6401 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-40HX750/46HX750/46HX751/55HX750/55HX751 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-40HX750/46HX750/46HX751/55HX750/55HX751 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 
CN6401 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
.
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