Sony KDL-32BX355 / KDL-40BX455 Service Manual ▷ View online
KDL-32BX355/40BX455 9
SECTION 3 - FLOW CHARTS AND DIAGRAMS
BLOCK DIAGRAM
To Panel
Tuner
DDR3 x 2
NAND Flash
MT5366
CVBS
KEYPAD
IR/ LED
HDMI1
Head PHONE
/ AUDIO OUT
/ AUDIO OUT
AMP
STA339BWTR
SPDIF OUT
VGA/HDMI AUDIO
USB
HDMI2
COMPONENT+COMPOSITE + AUDIO
Side I/O
Side I/O
VGA
.
IF 1
UART
SIL9185ACTU
RJ45
RTL8201CP
ETHERNET
ETHERNET PHY
CXD2828
DEMOD
MAX9728
IF 2
OVERALL BLOCK DIAGRAM
KDL-32BX355/40BX455 10
SECTION 3 - FLOW CHARTS AND DIAGRAMS
NO POWER
UNREG24V
BL-ON
GND
BL_ERR
1~5
6~10
11
12
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
CN6401
A
N/C
DIMMER
13
14
CN6402
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
G
INVERTER
CN6101
LCD PANEL &
CCFL BACKLIGHTS
POWER SUPPLY
MAIN BOARD
POWER AND CONTROL BLOCK DIAGRAM
KDL-32BX355/40BX455 11
SECTION 3 - FLOW CHARTS AND DIAGRAMS
*For Part Number information, refer to
“Section 4 - Disassembly/Part Number Information” on page 15
.
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-32BX355/40BX455 12
SECTION 3 - FLOW CHARTS AND DIAGRAMS
*For Part Number information, refer to
“Section 4 - Disassembly/Part Number Information” on page 15
.
STANDBY LED BLINKING
Protect
Shutdown.
Standby LED
Blinking
No
Yes
No
Yes
2X
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*
Main Board*
PROTECTION SHUTDOWN FLOWCHART
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