Sony KDL-32EX720 / KDL-32EX721 / KDL-32EX723 / KDL-32EX724 / KDL-32EX725 / KDL-32EX726 / KDL-32EX727 / KDL-32EX728 / KDL-32EX729 / KDL-37EX720 / KDL-37EX723 / KDL-37EX725 / KDL-40EX720 / KDL-40EX721 / KDL-40EX723 / KDL-40EX724 / KDL-40EX725 / KDL-40EX726 / KDL Service Manual ▷ View online
KDL-32/37/40/46/55EX720,721,723,724,725,726,726,727,728,729(AEP/UK/RUSS)
117
Far end
Video/Audio quality?
Network speed
or
far end system issue
Auto-Focus work?
Sound quality?
No video?
Manual Focus work?
Check Auto-Focus area
Enough network speed?
Skype unit
Call Skype sound test
Far end setting/system
Move unit away
from speaker
Skype unit
Audio problem
Video problem
Previous page
OK
NG
Yes
No
Yes
No
No
Yes
Yes
NG
3-10. Skype MALFUNCTION 2/2
TROUBLE SHOOTING
KDL-32/37/40/46/55EX720,721,723,724,725,726,726,727,728,729(AEP/UK/RUSS)
118
3-11. HDD-Rec MALFUNCTION
TROUBLE SHOOTING
HDD Rec
Malfunction
B board
HDD is connected
to the appropriate
USB port?
Connect to the
appropriate port
No
Yes
USB Hub is inserted
in between the
USB port and HDD?
USB Hub is
not supported
Yes
No
Is the drive size larger
than 32GB and
Smaller than 2TB??
Only 32GB~2TB
is supported
No
Yes
All the setups and
restrictions listed in
iManual are cleared?
Check the iManual
No
Yes
KDL-32/37/40/46/55EX720,721,723,724,725,726,726,727,728,729(AEP/UK/RUSS)
119
SEC 4. DIAGRAMS
4-1. BLOCK DIAGRAM
Satellite
Cable
Cable
Satellite
HDMI1
(ARC)
HDMI2
Terrestrial
HDMI3
HDMI4
COMP
SCART
PC
SPDIF
Main
SPEAKER
PC
HP/Line
Out
Assist
SPEAKER
Analog Video
Digital Video/TS/TMDS
Analog Audio
UART
Digital Audio
I2C
Analog Signal
PWM
SPI
X_AUDIO_MUTE1
X_AUDIO_MUTE2
X_FAULT
Main Speaker_Out_LR
Assist Speaker_Out
X_SYSTEM1_RST
SPDIF
HP/Line Out LR
HP_/ Line Out Det
PC_R,PC_G,PC_B,PC_H,PC_V
PC_LR
PC_5V, PC_DDC
PC_CON_Det
COMP_LR
VideoB_Det
ASPECT1
TV_Out
Scart_CV,R,G,B,FB
Scart_LR
TV_Out_LR
ASPECT1
VideoA_Det
S_Det
CEC3
DDC4
HPD4
CEC4
DDC_5V_4
TMDS4
CEC2
DDC3
HPD3
DDC_5V_3
TMDS3
CEC1
TMDS2
DDC2
DDC2
HPD2
DDC_5V_2
ARC
TMDS1
DDC1
DDC1
HPD1
DDC_5V_1
X_SYSTEM1_RST
LNA
SW
X’tal
LNA
X’tal
Silicon
Tuner
Silicon
Tuner
IF1
IF2
Zero-IF
27MHz
Ext Demod
IFAGC
Ext Demod
IFAGC
X’tal
TS1
TS2
DiSEqC_Out
DiSEqC_In
DDC
I2CB
DMD_RST
DMD_CLK_ENABLE1
DMD_CLK_ENABLE2
I2CB
CI/CI+
MS
5V
Current
Limit
Power
_
KEY
KEY
BD
_DI
S
C
1
,2
BD_EJECT
UAR
T
E
H Con.
USB4
BD
USB3
Wifi
USB2
USB1
5V
Current
Limit
5V
X_SYS
T
EM1_
RS
T
Current
Limit
USB
HUB
Crystal
X
_
SYSTEM1_RST
Ether
Ether
PHY
BACKLIGHT
TCON
PEL3
SA_MODE/L
U
T
_
SEL0
PE
M
_
WDT/XBUSY/BI
NT
MO
DE_PEM/TCON_RDY
LUT_SEL1/X_TCO
N
_RST/LR_FL
A
G
T_P
A
NE
L_SEL
LVDS
LVDS_ODD
LVDS_EVEN
I2C_C
SYSTEM1_PWR
REG_12V
REG_12V
1.2V
DDC
T-CON_VCC
Power
STBY 3.3V
REG12V
AUDIO_12V
AUDIO_12V
REG12V
1.5V
SYSTEM2_PWR
DDC
SYSTEM2_PWR
SYSTEM2_PWR
3.3V
DDC
DDC
REG_12V
REG_12V
5V
SYSTEM2_PWR
X’tal
X’tal
AC_MON
Reset
Reset
2.5V
LDO
LDO
3.3V
LDO
LDO
3.4V
LDO
LDO
S1.8V
LDO
S1.2V
LDO
Power_Control
MAIN_PWR
BACKLIGHT_ON
DIMMER
BACKLIGHT_MON
PFC_PWR
AC_MON
DIMMER_DC
TCON-ON
UARTA(LOG)
UARTC(Hotel/ECS)
UARTD
PEM_LOG
I2CA(Hotel_Clock)
MODE_PEM
Reset
SIRCS
DIMMER2
TL-JIG
Hotel /ECS
Temp Sensor
Sircs
KEY
LED
Human Sensor
Light Sensor
STBY_LED
POWER_LED
TIMER_LED
PIC_MUTE_LED
REC_LED
Light_Sensor_Det
Human_Sensor_Det
Power_KEY
KEY
UARTE
Temp
Sensor
SIRCS
I2CA
X_Hotel_PWR_CTRL
I2CA (EQSW, Temp Sensor, Hotel Clock)
I2CB (Ext Demod)
I2CC (Panel, RGB Sensor)
UARTA (LOG)
UARTB (RF-Remote)
UARTC (IR Blaster/ECS)
DIMMER
LOGO
DIMMER_DC
DEBUG_LED2
DMD_CLK_ENABLE2
DMD_RST
DEBUG_LED3
DMD_CLK_ENABLE1
PANEL_PWR
HP_DET
X_WIFI_RST
X_AUDIO_MON
HDMIEQ_INT
SPDIF_SEL
DC_MON
KEY
Light_Sensor_Det
AS
PE
CT1
PE
CT1
Hum
a
n_Sensor_Det
PANEL_SEL
BACK
LIGHT_
MON
PANEL_PWR_Det
AC
_M
ON
PFC_MON
POWE
R_
KEY
KEY
DEB
UG_LE
D1
STBY_LED
TIMER_L
E
D
MA
IN_
P
WR
MA
IN_
SS_
MON
SYSTEM2_P
W
R
R
SYSTEM1_P
W
R
R
PIC
_
MUTE
_LE
D
X_
RF_
RF_
RST
X_
HOTEL_
HOTEL_
P
W
R
R
_
C
T
RL
POWER_LED
RE
C_
LED
LED
X_SYSTEM1_RST
PFC_PWR
X_AUDIO
_MUTE1
X_AUDIO
_MUTE2
PC
_C
ON_
ON_
D
ET
VI
DE
DE
OA
_DET
VI
DE
DE
OB
_DE
T
CR
_D
ET
ET
BACK
LIGHT_
ON
NMI
X_
TCON_R
TCON_R
ST
SA_MODE
BI
N
N
T
TC
O
O
N
_R
DY
DY
DATA
1
Panelless
BT
V
V
_
P
IN
T
NAND_WP
BTV_G
P
IO
x
x
6
X_
RF
_
RF
_
R
S
T
SYSTEM
1_PWR
I2S_D
0
UARTB
BTV_SE
L
BTV_SPD
IF
I2CA
ASURA
UART_E
ASURA
B
T
V
_
FID
Audio
Power AMP
TV_Out_LR
Tuner_LR
Main Speaker_Out_LR
Atreyu_SPDIF
Assist Speaker_Out_LR
Line Out_LR
PC_LR
COMP_LR
AV3_LR
Scart1_LR
Tuner_LR
PC_G
PC_B
PC_R
PC_R
PC_H
PC_V
COMP_Y
COMP_Pb
COMP_Pr
Scart_CV
Scart_G
Scart_B
Scart_R
Scart_FB
TV_Out
75
Ω
Drv
TMDS
DDC
CEC
X’tal
IF1
TS
EQ SW
I2CA
3.3->1
OPAMP
[NJU72040V]
Audio
Power AMP
OPAMP
X_SYSTEM1_RST
AUDIO_MON
Atreyu
27M
4M
[HORUS3]
[ASCOT2Sip]
[SEKITO2]
[ZHUI]
[Sil9287B]
[NJM2561]
41M
41M
[D–510D]
[NJU72011RB]
[D–510D]
0
0
H / L
[LM75B]
[LNBH23]
0
0
[TPS2553DBV]
[TPS2553DBV]
[RTL8201E]
[GL850G]
12M
One–
NAND
DDR3
Muxed
–1333
2Gb
2Gb
DDR3
–1333
2Gb
48M
GND
32.76
8K
[PST3629]
Push
P
A
A
N
E
L
Click on the first or last page to see other KDL-32EX720 / KDL-32EX721 / KDL-32EX723 / KDL-32EX724 / KDL-32EX725 / KDL-32EX726 / KDL-32EX727 / KDL-32EX728 / KDL-32EX729 / KDL-37EX720 / KDL-37EX723 / KDL-37EX725 / KDL-40EX720 / KDL-40EX721 / KDL-40EX723 / KDL-40EX724 / KDL-40EX725 / KDL-40EX726 / KDL service manuals if exist.