Sony KDL-32EX425 / KDL-46EX525 (serv.man2) Service Manual ▷ View online
5
KDL-32EX425/46EX525
KDL-32EX425/46EX525
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:
safety checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly soldered
connections. Check the entire board surface for solder splashes and
bridges.
bridges.
2. Check the interboard wiring to ensure that no wires are “pinched” or
touching high-wattage resistors.
3. Check that all control knobs, shields, covers, ground straps, and
mounting hardware have been replaced. Be absolutely certain that
you have replaced all the insulators.
you have replaced all the insulators.
4. Look for unauthorized replacement parts, particularly transistors,
that were installed during a previous repair. Point them out to the
customer and recommend their replacement.
customer and recommend their replacement.
5. Look for parts which, though functioning, show obvious signs of
deterioration. Point them out to the customer and recommend their
replacement.
replacement.
6. Check the line cords for cracks and abrasion. Recommend the
replacement of any such line cord to the customer.
7. Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for AC leakage. Check leakage as
described below.
described below.
Leakage Test
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instructions.
instructions.
2. A battery-operated AC milliampmeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery-operated AC voltmeter. The “limit” indication is 0.75
V, so analog meters must have an accurate low voltage scale.
The Simpson’s 250 and Sanwa SH-63TRD are examples of
passive VOMs that are suitable. Nearly all battery-operated digital
multimeters that have a 2 VAC range are suitable (see Figure A).
passive VOMs that are suitable. Nearly all battery-operated digital
multimeters that have a 2 VAC range are suitable (see Figure A).
How to Find a Good Earth Ground
A cold-water pipe is a guaranteed earth ground; the cover-plate
A cold-water pipe is a guaranteed earth ground; the cover-plate
retaining screw on most AC outlet boxes is also at earth ground. If the
retaining screw is to be used as your earth ground, verify that it is at
ground by measuring the resistance between it and a cold-water pipe
with an ohmmeter. The reading should be zero ohms.
If a cold-water pipe is not accessible, connect a 60- to 100-watt
trouble- light (not a neon lamp) between the hot side of the receptacle
and the retaining screw. Try both slots, if necessary, to locate the hot
side on the line; the lamp should light at normal brilliance if the screw
is at ground potential (see Figure B).
To Exposed Metal
Parts on Set
0.15 µF
Earth Ground
AC
Voltmeter
(0.75V)
Trouble Light
AC Outlet Box
Ohmmeter
Cold-water Pipe
Figure A. Using an AC voltmeter to check AC leakage.
Figure B. Checking for earth ground.
6
KDL-32EX425/46EX525
KDL-32EX425/46EX525
SECTION 1: DIAGRAMS
1-1. CIRCUIT BOARDS LOCATION
SWITCH
UNIT
HLR2
HMS3
GE2A
TCON
BATV
Figure 1-1. KDL-32EX425
SWITCH
UNIT
HLR2
HMS3
GE3A
TCON
BATV
Figure 1-2. KDL-46EX525
7
KDL-32EX425/46EX525
KDL-32EX425/46EX525
1-2. PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS INFORMATION
All capacitors are in μF unless otherwise noted. pF : μμF 50WV or less
are not indicated except for electrolytics and tantalums.
All electrolytics are in 50V unless otherwise specifi ed.
All resistors are in ohms. k
are not indicated except for electrolytics and tantalums.
All electrolytics are in 50V unless otherwise specifi ed.
All resistors are in ohms. k
=1000, M=1000k
Indication of resistance, which does not have one for rating electrical
power, is as follows:
power, is as follows:
Pitch : 5mm
Rating electrical power :
1
/
4
W
1
/
4
W in resistance,
1
/
10
W and
1
/
16
W in chip resistance.
: nonfl ammable resistor
: fusible resistor
: internal component
: panel designation and adjustment for repair
: earth ground
: earth-chassis
: earth-chassis
All variable and adjustable resistors have characteristic curve B,
unless otherwise noted.
Readings are taken with a color-bar signal input.
Readings are taken with a 10M
unless otherwise noted.
Readings are taken with a color-bar signal input.
Readings are taken with a 10M
digital multimeter.
Voltages are DC with respect to ground unless otherwise noted.
Voltage variations may be noted due to normal production tolerances.
Voltage variations may be noted due to normal production tolerances.
All voltages are in V.
S : Measurement impossibility.
S : Measurement impossibility.
: B+line.
: B-line. (Actual measured value may be different).
: signal path. (RF)
Circled numbers are waveform references.
The components identifi ed by shading and
!
symbol are critical for safety. Replace
only with part number specifi ed.
The symbol
indicates a fast operating fuse and is displayed on the component
side of the board. Replace only with fuse of the same rating as marked.
NOTE: The components identifi ed by a red outline and a mark contain confi dential
information. Specifi c instructions must be adhered to whenever these components
are repaired and/or replaced.
See Appendix A: Encryption Key Components in the back of this manual.
information. Specifi c instructions must be adhered to whenever these components
are repaired and/or replaced.
See Appendix A: Encryption Key Components in the back of this manual.
REFERENCE INFORMATION
RESISTOR
: RN
: RN
METAL FILM
: RC
SOLID
: FPRD NONFLAMMABLE CARBON
: FUSE NONFLAMMABLE FUSIBLE
: RW
: FUSE NONFLAMMABLE FUSIBLE
: RW
NONFLAMMABLE WIREWOUND
: RS
NONFLAMMABLE METAL OXIDE
: RB
NONFLAMMABLE CEMENT
:
ADJUSTMENT RESISTOR
COIL
: LF-8L MICRO INDUCTOR
: LF-8L MICRO INDUCTOR
CAPACITOR
: TA
: TA
TANTALUM
: PS
STYROL
: PP
POLYPROPYLENE
: PT
MYLAR
: MPS METALIZED POLYESTER
: MPP METALIZED POLYPROPYLENE
: ALB BIPOLAR
: ALT
: MPP METALIZED POLYPROPYLENE
: ALB BIPOLAR
: ALT
HIGH TEMPERATURE
: ALR HIGH RIPPLE
G
D
S
B1 E1
C2
B2 C1
E2
2
3
4
5
6
7
8
9
–
1
G
D
S
B2 E2
C1
B1 C2
E1
B2 E2
C1
B1 C2
E1
B2 E2
C1
B1 C2
E1
B1 E1
E2
C1(B2)
C2
B1
E2
C1
C2
(B2)
E1
(B2)
E1
E2
B1
C2
C1
B1
E1
C2
B2
C1
E2
G
S
S
D
G
D
B1
E1
C2
B2
C1
E2
B1
E2
C2
C1(B2)
E2
B1
C1
C2
E1(B2)
C2
B1
C1
E2
E1(B2)
C2
B1
C1
E2
B2
E1
C2
Ver.1.6
Transistor
(FET)
(FET)
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Discrete semiconductor
(Chip semiconductors that are not actually used are included.)
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Diode
Source
Source
Anode
Anode
(NC)
(NC)
Cathode
Anode
Cathode
Common
Cathode
Cathode
Common
Cathode
Cathode
Common
Common
Common
Common
Cathode
Anode
Base
Emitter
Collector
Base
Emitter
Collector
Drain
Gate
Gate
Drain
Device
Printed symbol
Terminal name
Circuit
Terminal name of semiconductors in silk screen
printed circuit ( )
Anode
Anode
Anode
Cathode
Anode
Anode
Cathode
Transistor
(FET)
(FET)
Transistor
(FET)
(FET)
Emitter
Collector
Base
Transistor
Source
Gate
Drain
Cathode
Anode
Anode
Cathode
Anode
Anode
*
18
11
17
16
15
14
13
12
10
21
20
19
23
22
8
KDL-32EX425/46EX525
KDL-32EX425/46EX525
1-3. ENGINEERING BLOCK DIAGRAM
48M
32.76
8K
[PST3629]
GND
Push
P
A
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
XReality
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
VideoB_Det
COMP2_LR
VideoA_Det
VIDEO_CV
VIDEO1_LR
VIDEO1_LR
CEC3
DDC4
HPD4
CEC4
DDC_5V_4
TMDS4
CEC2
DDC3
HPD3
DDC_5V_3
TMDS3
CEC1
TMDS2
DDC2
TMDS2
DDC2
HPD2
DDC_5V_2
ARC
TMDS1
DDC1
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
Power_Control
MAIN_PWR
Power_KEY
KEY
Light_Sensor_Det
STBY_LED
POWER_LED
TL-JIG
UARTA(LOG)
Hotel
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
HUB
X’tal
Power
Tuner_LR
Current
Limit
USB3
Wifi
USB4
BD
AC
_M
ON
PFC_MON
P
O
W
E
E
R
_
K
E
Y
POWE
R_
LED
LED
RE
C_
LED
C_
LED
X_
SYSTEM1_R
SYSTEM1_R
S
T
DIMMER
D
C
_
M
O
N
KEY
Light_Sensor_Det
UARTA (LOG)
PFC_PWR
DEB
U
G_LE
D1
Hum
a
n_Sensor_Det
LVDS
PEL3
UARTD
PANEL_
SEL
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_V
PC_R
PC_H
PC_V
PC_LR
VIDEO1_LR
COMP2_LR
Tuner_LR
VIDEO_CV
COMP_Y
S1.8V
LDO
3.3V
LDO
LDO
DDC
5V
STBY 3.3V
2.5V
LDO
LDO
TCON-ON
SYSTEM2_PWR
DDC
REG_12V
T-CON_VCC
REG12V
AUDIO_12V
REG_12V
BACK
LIGHT_
MON
X_
AUDIO
AUDIO
_
MUTE1
X_
AUDIO
AUDIO
_
MUTE2
PANEL_
PWR_
Det
5V
UARTE
P
C
_
C
O
N
_
D
E
T
Crystal
VI
DE
DE
OA
_DET
VI
DE
DE
OB
_DE
T
CR
_D
ET
ET
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)
I2CB (Ext Demod)
LOGO
DMD_RST
X_AUDIO_MON
STBY_LED
TIMER_L
E
D
MA
IN_
P
WR
M
A
IN
_
S
S
_
M
O
N
DIMMER_DC
TS2
TS1
LNA
/ECS
Light Sensor
X_
TCON_R
TCON_R
ST
SA
_MODE
_MODE
B
IN
T
T
TC
O
O
N
_RDY
IF1
Main Speaker_Out_LR
S1.2V
LDO
PEM_LOG
I2CA(Hotel_Clock)
DEBUG_LED2
DEBUG_LED3
DMD_CLK_ENABLE1
PANEL_PWR
Atreyu_SPDIF
BACK
LIGHT_
ON
S
Y
S
T
E
M
2
_
P
W
R
R
S
Y
S
T
E
M
1
_
P
W
R
R
P
IC
_
M
U
T
E
_
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_SYS
T
EM1_
RS
T
X
_
SYSTEM1_
RST
Reset
SIRCS
UARTB (RF-Remote)
UARTC (IR Blaster/ECS)
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
LDO
SYSTEM2_PWR
X_
RF_
RF_
R
ST
NMI
X_
HOTEL_
HOTEL_
P
W
R
_
C
T
RL
DATA
1
HP_DET
X_WIFI_RST
SPDIF_SEL
BACKLIGHT
DIMMER2
LVDS_ODD
LVDS_EVEN
LVDS_EVEN
SA
_MODE/L
U
T
_
SEL0
PE
M
_
WDT/XBUSY/BI
NT
I2C_C
MO
DE_PEM/TCON_RDY
L
U
T
_
S
E
L
1
/X
_
T
C
O
N
_
R
S
T
/L
R
_
F
L
A
G
T_P
A
NE
L_SEL
Digital Audio
UART
REG_12V
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