Sony KDL-32EX727 / KDL-40EX727 / KDL-46EX727 / KDL-55EX727 Service Manual ▷ View online
KDL-32EX727/40EX727/46EX727/55EX727
19
SECTION 3 - CHASSIS OVERVIEW
POWER SUPPLY
There are different Power Supply Boards used in the models in this
manual. The type of board depends on the size of LCD panel. They
are:
● G10A-Board (32”)
● G4B-Board (40”)
● G5B-Board (46”)
● G6A-Board (55”)
Note:the G8A in the 55” models is the Power Supply Board
for the Panel LED backlight system.
There are 2 distinct sections on the power supply:
Standby Supply: Continuously operational as long as AC power is
Standby Supply: Continuously operational as long as AC power is
applied, the standby supply generates 3.3V for the circuits requiring
power while the unit is turned off. An unregulated 19V line is present
to provide power to the main relay, PFC and main power supply at
turn-on.
Main Supply: Once the power supply receives a power-on command
Main Supply: Once the power supply receives a power-on command
from the CPU on the Main Board, the main switching supply is turned
on to provide a regulated 12V source and an regulated 24V source
for the LED power supply circuits.
POWER SUPPLY FOR BACKLIGHT
SYSTEM
The G8A-Board is the Power Supply Board for the Panel LED
backlighting system (including the LED Driver Board) for the 55”
model only. 390V, 19V, and 12V are applied to the board from the
G6A Board to develop the 24V. The 24V is applied to the LD Driver
board.
LD BOARD (LED DRIVER BOARD)
The LED Driver Board is controlled by the T-CON/HFR Board to
perform overall backlight power-on, backlight level, and local dimming
functions. This board takes the 24V from the Power Supply Board
(or G8A Board for the 55” models) and develops the negative and
positive voltages to directly drive the LEDs in the panel assembly.
3D IR EMITTER
Designated as the HEM2 Board, this board is the internal 3D IR
Emitter.
SWITCH UNIT
This board contains the power, channel, and volume up/down and
menu buttons.
MOTION SENSOR BOARD
Designated as the HMS3 Board, the Motion Sensor Board contains
the circuits for the Motion Sensor. The Motion Sensor detects when
there is movement in front of the TV. If there is no movement in
front of the TV after a predetermine amount of time the backlight is
turned off (audio present). After an extended period of time the TV is
completely turned off.
IR BOARD
Designated as the HLR2 Board, the IR Board contains the power,
standby, and timer LED’s are located on this board along with the IR
remote receiver and light level sensor.
KDL-32EX727/40EX727/46EX727/55EX727
20
SECTION 3 - CHASSIS OVERVIEW
LCD PANEL ASSEMBLY
The LCD Panel Assembly includes the LCD Panel, T-CON Board,
and LED Backlight system.
NOTE: The LD Board is not included with the LCD Panel.
The LCD Panel contains the actual liquid crystals, color filters, and
NOTE: The LD Board is not included with the LCD Panel.
The LCD Panel contains the actual liquid crystals, color filters, and
polarizers. The liquid crystals are manipulated by the applied voltage
to pass a specific amount of light - from the backlight- depending on
the level of voltage applied.
The T-CON performs all the control, timing, charge, and discharge
The T-CON performs all the control, timing, charge, and discharge
functions driving the operation of the LCD Panel.
A new LCD Panel assembly from parts will include the following
A new LCD Panel assembly from parts will include the following
items.
1. LCD Panel
2. LED Backlighting Components
3. T-CON Board
T-CON BOARD
The T-CON Board communicates between the LCD Panel and the
microprocessor on the Main Board. (NOTE: The T-CON Board is not
available as a replacement part for all models.)
KDL-32EX727/40EX727/46EX727/55EX727
21
SECTION 3 - CHASSIS OVERVIEW
DIAGRAMS
BLOCK DIAGRAM
48M
32.76
8K
[PST3629]
GND
Push
P
A
N
E
L
[LM75B]
DDR3
–1333
2Gb
DDR3
–1333
2Gb
One–
NAND
Muxed
2Gb
[RTL8201E]
[TPS2553DBV]
[GL850G]
12M
[TPS2553DBV]
H/L
[D–510D]
[D–510D]
[NJU72040V]
41M
[LNBH23]
[MIC2005]
[SEKITO2]
[GAIA1a]
41M
[HORUS3]
27M
4M
[ASCOT2Sip]
[Sil9287B]
0
0
Atreyu
HDMI1
(ARC)
HDMI2
HDMI3
Aerial
Cable
Satellite
PC
PC
COMP
CVBS
SPDIF
Main
SPEAKER
HP/Line
Out
Assist
SPEAKER
Analog Video
Digital Video/TS/TMDS
Analog Audio
Analog Signal
PWM
I2C
SPI
X_SYSTEM1_RST
AUDIO_MON
X_FAULT
Main Speaker_Out_LR
X_SYSTEM1_RST
Assist Speaker_Out
SPDIF
HP/Line Out LR
HP_/ Line Out Det
PC_5V, PC_DDC
PC_LR
PC_R,PC_G,PC_B,PC_H,PC_V
PC_CON_Det
Cr_Det
ASPECT1
COMP_Y, Pb, Pr
VideoB_Det
COMP2_LR
COMP2_LR
VideoA_Det
VIDEO_CV
VIDEO1_LR
CEC3
DDC4
HPD4
CEC4
DDC_5V_4
TMDS4
CEC2
DDC3
HPD3
DDC_5V_3
TMDS3
CEC1
TMDS2
DDC2
HPD2
DDC_5V_2
ARC
TMDS1
DDC1
HPD1
DDC_5V_1
EQ SW
3.3->1
I2CA
X_SYSTEM1_RST
TCON
Reset
Ether
PHY
X’tal
Temp
Sensor
Audio
Power AMP
HDMI4
Ether
KEY
LED
TMDS
DDC
CEC
Line Out_LR
P
ow
er
_C
on
tro
l
MAIN_PWR
Power_KEY
KEY
Light_Sensor_Det
STBY_LED
POWER_LED
TL-JIG
UARTA(LOG)
Hote
l
UARTC(Hotel/ECS)
BACKLIGHT_ON
DIMMER
BACKLIGHT_MON
SYSTEM2_PWR
Human Sensor
Human_Sensor_Det
X_AUDIO_MUTE1
PFC_PWR
OPAMP
AC_MON
I2CA
X’tal
DIMMER_DC
USB2
Current
Limit
USB1
USB
HUB
X’tal
P
ow
er
Tuner_LR
Current
Limit
USB3
Wifi
USB4
BD
AC
_M
O
N
P
FC
_M
O
N
P
O
W
E
R
_K
E
Y
P
O
W
E
R
_L
ED
R
E
C
_L
ED
X
_S
Y
S
TE
M
1_
R
ST
DIMMER
D
C
_M
O
N
K
E
Y
Light_Sensor_Det
UARTA (LOG)
P
FC
_P
W
R
D
E
B
U
G
_L
E
D
1
H
um
an
_S
en
so
r_
D
et
LVDS
PEL3
UARTD
P
A
N
E
L_
S
EL
5V
Aerial
Ext Demod
X’tal
LNA
Ext Demod
IFAGC
DDC
I2CB
I2CB
Satellite
Silicon
Tuner
X’tal
Silicon
Tuner
Zero-IF
IF1
X’tal
DiSEqC_Out
IFAGC
IF2
DiSEqC_In
27MHz
SW
COMP_Y
COMP_Pb
COMP_Pr
PC_G
PC_B
PC_R
PC_H
PC_H
PC_V
PC_LR
VIDEO1_LR
COMP2_LR
Tuner_LR
VIDEO_CV
COMP_Y
S1.8V
LDO
3.3V
LDO
DDC
5V
STBY 3.3V
2.5V
LDO
TCON-ON
SYSTEM2_PWR
DDC
REG_12V
T-CON_VCC
REG12V
AUDIO_12V
REG_12V
B
A
C
K
LIG
H
T_
M
O
N
X_
AU
D
IO
_M
U
TE
1
X_
AU
D
IO
_M
U
TE
2
PANEL_PWR_Det
5V
UARTE
P
C
_C
O
N
_D
E
T
Crystal
VID
EO
A_
D
E
T
V
ID
E
O
B
_D
E
T
C
R
_D
E
T
TIMER_LED
PIC_MUTE_LED
REC_LED
Temp Sensor
X_Hotel_PWR_CTRL
Current
Limit
5V
I2CA (EQSW, Temp Sensor, Hotel Clock)
I2CB (Ext Demod)
LOGO
DMD_RST
X_AUDIO_MON
STBY_LE
D
TIM
ER
_L
E
D
M
A
IN
_P
W
R
M
AIN
_S
S_
M
O
N
DIMMER_DC
TS2
TS1
LNA
/E
C
S
Light Sensor
X_
TC
O
N
_R
ST
S
A
_M
O
D
E
B
IN
T
TC
O
N
_R
D
Y
IF1
Main Speaker_Out_LR
S1.2V
LDO
PEM_LOG
I2CA(Hotel_Clock)
DEBUG_LED2
DEBUG_LED3
DMD_CLK_ENABLE1
PANEL_PWR
Atreyu_SPDIF
B
A
C
K
LIG
H
T_
O
N
S
Y
S
TE
M
2_
P
W
R
S
Y
S
TE
M
1_
P
W
R
P
IC
_M
U
TE
_L
E
D
1.5V
3.3V
MODE_PEM
I2CC (Panel, RGB Sensor)
DMD_CLK_ENABLE2
HDMIEQ_INT
DMD_RST
DMD_CLK_ENABLE1
DMD_CLK_ENABLE2
X_
SY
ST
EM
1_
RS
T
X
_SYSTEM1_RS
T
Reset
SIRCS
UARTB (RF-Remote)
UARTC (IR Blaster/ECS)
MS
TS
Panelless
AC_MON
Reset
H Con.
Audio
Power AMP
Assist Speaker_Out_LR
Sircs
SIRCS
AUDIO_12V
REG12V
SYSTEM2_PWR
DDC
1.2V
SYSTEM1_PWR
DDC
REG_12V
3.4V
LDO
SYSTEM2_PWR
X
_R
F_
R
S
T
N
M
I
X_
H
O
TE
L_
PW
R
_C
TR
L
D
A
TA
1
HP_DET
X_WIFI_RST
SPDIF_SEL
BACKLIGHT
DIMMER2
LVDS_ODD
LVDS_EVEN
LVDS_EVEN
SA
_M
O
D
E/
LU
T_
SE
L0
P
E
M
_W
D
T/
X
B
U
S
Y
/B
IN
T
I2
C
_C
MODE_PEM/TCON_RDY
LU
T_
S
E
L1
/X
_T
C
O
N
_R
S
T/
LR
_F
LA
G
T_
P
A
N
E
L_
S
E
L
Digital Audio
UART
REG_12V
FIGURE 3-5. OVERALL BLOCK DIAGRAM
KDL-32EX727/40EX727/46EX727/55EX727
22
SECTION 3 - CHASSIS OVERVIEW
BATV
X-Reality Processor
TV Microprocessor
Video Processing
HDMI Processing
HDCP Processing
IP (Image Processor)
Scan Converter (Scalar)
Audio Processing
Video Switcher
HDMI Switcher
ATSC/NTSC Tuner
Temperature Sensor
Audio Output Amplifier
Control
LVDS
Keys
Power/
SIRCS
LCD Panel Assembly
LCD PANEL
Switch Unit
LEDs
IR Sensor
Light Level
HLR2
Power
G10A-Board (32")
G4B-Board (40")
G5-Baord (46")
G6A-Board (55")
LCD Panel
R
L
RF Input
Component/Composite
Composite
PC Input
4 HDMI Inputs
Optical Digital Audio Output
LED
Backlight System
TCON/HFR
(120Hz)
AC
Input
2 USB 2.0
Motion Sensor
RJ45 Ethernet
HMS3
Headphone/Analog Audio Output
Power +
Power -
Power -
3D Emitter
HEM2
Main Power Supply
Standby Power Supply
AC Relay
LED Backlight Power Supply
(32", 40", 46")
(32", 40", 46")
LED Power
LED 24V
LED Power
Power &
Control
Power &
Control
Power
55" Models
32", 40", 46" Models
Control
NOTE: The LD-Board is NOT included
in the LCD Panel Assembly
Power Key
Function Keys
Function Keys
G8A
LD
LD
FIGURE 3-6. OVERALL BLOCK DIAGRAM
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