DOWNLOAD Sony KDL-40EX645 / KDL-46EX641 / KDL-46EX645 / KDL-50EX645 / KDL-55EX645 Service Manual ↓ Size: 4.2 MB | Pages: 50 in PDF or view online for FREE

Model
KDL-40EX645 KDL-46EX641 KDL-46EX645 KDL-50EX645 KDL-55EX645
Pages
50
Size
4.2 MB
Type
PDF
Document
Service Manual
Brand
Device
TV
File
kdl-40ex645-kdl-46ex641-kdl-46ex645-kdl-50ex645-kd.pdf
Date
PREV: Sony KDL-32NX655 Service Manual

Sony KDL-40EX645 / KDL-46EX641 / KDL-46EX645 / KDL-50EX645 / KDL-55EX645 Service Manual ▷ View online

KDL-40EX645/46EX641/46EX645/50EX645/55EX645 12
SECTION 3 - FLOW CHARTS AND DIAGRAMS
NO POWER
ALL MODELS EXCEPT KDL-50EX645
STBY3.3V
AUDIO_12V
AC_OFF_DET
POWER_ON 
1
2
3
4
AUDIO_GND
BL_ERR
REG12V_GND
REG12V
5
6, 7
8, 9
10
BL_ON
TCON_12V
DIMMER
N/C
11
12
13
14
TCON_ON 
15
AC IN (N)
AC IN (H)
1
2
CN2
A
CN3
REG 12V
GND
AUDIO_12V
8
5, 7, 9
10
DIMMER
BL_ERR
1
12
CN201
TCON_12V
14
AC_FF_DET
TCON_ON
3
15
BL_ON
13
STBY 3.3V
4
POWER_ON
2
GL5A (40")
GL5B (46")
GE55 (55")
CN1
LCD PANEL, TCON
&
LED BACKLIGHTS
V+
1
N/C
V+
2
3
V+
1
N/C
V+
2
3
CN4
 
 
POWER AND CONTROL BLOCK DIAGRAM
KDL-40EX645/46EX641/46EX645/50EX645/55EX645 13
SECTION 3 - FLOW CHARTS AND DIAGRAMS
KDL-50EX645 ONLY
STBY3.3V
AUDIO_12V
AC_OFF_DET
POWER_ON 
1
2
3
4
AUDIO_GND
BL_ERR
REG12V_GND
REG12V
5
6, 7
8, 9
10
BL_ON
TCON_12V
DIMMER
N/C
11
12
13
14
TCON_ON 
15
AC IN (N)
AC IN (H)
1
2
CN2
A
REG 12V
GND
AUDIO_12V
6, 8
5, 7, 9
10
DIMMER
BL_ERR
1
12
CN201
TCON_12V
14
AC_FF_DET
TCON_ON
3
15
BL_ON
13
STBY 3.3V
4
POWER_ON
2
GE50
CN1
LCD PANEL, TCON
&
LED BACKLIGHTS
BL_ON
12
N/C
DIMMER
13
14
UNREG 24V
1~5
GND
BL_ERR
6~10
11
CN3
3V
3V
3V
3V
0V
LD
POWER SUPPLY
MAIN BOARD
 
 
POWER AND CONTROL BLOCK DIAGRAM FOR KDL-50EX645
KDL-40EX645/46EX641/46EX645/50EX645/55EX645 14
SECTION 3 - FLOW CHARTS AND DIAGRAMS
*For Part Number information, Refer to 
“Section 4 - Disassembly/Part Number Information” on page 18
.
No Power
Is standby LED 
blinking?
No
Yes
No
See 
Protection Shutdown 
flowchart
Yes
Does red standby 
LED on front panel 
light?
Press power 
button while 
monitoring pin 3 of 
CN6401 on power 
supply board
High (3.3V)
on pin 3?
Yes
No
Main Board*
Power Supply 
Board*
High (3.3V)
on pin 2?
Yes
No
Power Supply 
Board*
Power Supply 
Board*
NO POWER FLOWCHART
KDL-40EX645/46EX641/46EX645/50EX645/55EX645 15
SECTION 3 - FLOW CHARTS AND DIAGRAMS
*For Part Number information, Refer to 
“Section 4 - Disassembly/Part Number Information” on page 18
.
STANDBY LED BLINKING
Protect 
Shutdown. 
Standby LED 
Blinking
No
Yes
No
Yes
2X
Main Board*
3X
5X
No
Yes
LCD Panel*
6X
Yes
7X
No
Immediately
After a While
Check room 
temperature and 
ventilation around 
unit
Power Supply 
Board*
Main Board*
“SONY” logo 
appears before 
shutdown?
Yes
No
LCD Panel*
Power Supply 
Board*
PROTECTION SHUTDOWN FLOWCHART
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