Sony KF-42WE620 / KF-50WE620 Service Manual ▷ View online
94
KF-42WE620/50WE620
KF-42WE620/50WE620
SECTION 3: DIAGRAMS
3-1. CIRCUIT BOARDS LOCATION
3-2. 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.
less are not indicated except for electrolytics and tantalums.
All electrolytics are in 50V unless otherwise specifi ed.
All resistors are in ohms. k
Ω=1000Ω, MΩ=1000kΩ
Indication of resistance, which does not have one for rating
electrical power, is as follows:
electrical 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
All variable and adjustable resistors have characteristic curve B,
unless otherwise noted.
unless otherwise noted.
Readings are taken with a color-bar signal input.
Readings are taken with a 10M
Ω digital multimeter.
Voltages are DC with respect to ground unless otherwise noted.
Voltage variations may be noted due to normal production
tolerances.
tolerances.
All voltages are in V.
S : Measurement impossibility.
: B+line.
: B-line. (Actual measured value may be different).
: signal path. (RF)
Circled numbers are waveform references.
Divided schematic diagram:
Schematic diagrams of A, BB, BC, M, and U boards are divided into
several pieces. Information to where the line is to be connected is
printed at the end of each line.
several pieces. Information to where the line is to be connected is
printed at the end of each line.
For example: [TO A1/3, A2/3_1] means the line is connected to Ref.
No. 1 of A (1 of 3) and A (2 of 3) schematic diagrams.
No. 1 of A (1 of 3) and A (2 of 3) schematic diagrams.
TO A1/3,A2/3_1
Ref. No.
Name of divided schematic diagram
A
F
G1
G3
U
C2
AU
RF antenna
switch
switch
Power supply
block
block
H3
UD
T
DIC2
H2
H4
H1
C1
95
KF-42WE620/50WE620
KF-42WE620/50WE620
REFERENCE INFORMATION
RESISTOR
: RN METAL FILM
: RC SOLID
: FPRD NONFLAMMABLE CARBON
: FUSE NONFLAMMABLE FUSIBLE
: RW NONFLAMMABLE WIREWOUND
: RS NONFLAMMABLE METAL OXIDE
: RB NONFLAMMABLE CEMENT
:
: RN METAL FILM
: RC SOLID
: FPRD NONFLAMMABLE CARBON
: 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 TANTALUM
: PS STYROL
: PP POLYPROPYLENE
: PT MYLAR
: MPS METALIZED POLYESTER
: MPP METALIZED POLYPROPYLENE
: ALB BIPOLAR
: ALT HIGH TEMPERATURE
: ALR HIGH RIPPLE
: TA TANTALUM
: PS STYROL
: PP POLYPROPYLENE
: PT MYLAR
: MPS METALIZED POLYESTER
: MPP METALIZED POLYPROPYLENE
: ALB BIPOLAR
: ALT HIGH TEMPERATURE
: ALR HIGH RIPPLE
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.
Les composants identifi es per un trame et une marque
!
sont critiques pour la
securite. Ne les remplacer que par une piece portant le numero specifi e.
Le symbole
indique une fusible a action rapide. Doit etre remplace par une
fusible de meme yaleur, comme maque.
G
D
S
B1 E1
C2
B2 C1
E2
2
3
4
5
6
7
8
9
0
qa
qs
qf
qh
qj
qk
–
1
G
D
S
B2 E2
C1
B1 C2
E1
B2 E2
C1
B1 C2
E1
B2 E2
C1
B1 C2
E1
ql
B1 E1
E2
C1(B2)
C2
w;
B1
E2
C1
C2
ws
wd
(B2)
E1
(B2)
E1
E2
B1
C2
C1
wa
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.1.5
Transistor
(FET)
(FET)
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Transistor
Discrete semiconductot
(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
qd
Transistor
(FET)
(FET)
Transistor
(FET)
(FET)
qg
Emitter
Collector
Base
Transistor
Source
Gate
Drain
Cathode
Anode
Anode
Cathode
Anode
Anode
*
KF-42WE620/50WE620
96
KF-42WE620/50WE620
3-3. BLOCK DIAGRAMS
A31
A30
A30
SUB-YV
CN8008
SUB-C
A28
MS-L
A27
MS-R
A26
SUB TU LR
A25
A24
SUB TU V
MAIN TU R
A23
MAIN TU L
A22
MAIN TU V
C21
SDA
C20
A19
SCL
MAIN-R OUT
A18
MAIN-L OUT
A16
CR
CB
Y
C/V COMP SW
A15
COMP CR
A14
COMP CB
A13
COMP Y
A11
CONT-S IN
A10
CONT-S OUT
C8
DVI-MUTE
A8
DVI-VGA
A7
DVI-RESE
A6
VAR MUTE
C5
+5V
C4
+5V
C3
+9V
C2
+9V
A3
VAR R OUT
A2
VAR L OUT
MS-L
A (1/2) (TUNER/RELAY)
MS-R
S-LR
S-V
S-V
M-R
M-L
M-V
M-L
M-V
SDA
SCL
SCL
R-OUT
L-OUT
L-OUT
C/V COMP SW
CONT-S IN
CONT-S OUT
DVI-MUTE
VGA
RESET
SET
+9V
+9V
SET
+5V
+5V
VAR R
VAR L
VAR L
C31
B31
V-PULSE
A31
STBY 3.3V
DIC-RST
C30
CV-COMP-SW
B30
ATSC-OVP
A30
3.3V RST
B29
ATSC-RXD
C28
C27
ATSC-TXD
LINE-MUTE
B27
CNVSS
A27
CE
C26
B26
A26
VCHIP-SY
C25
VCHIP-MY
B25
B24
MS-RST
C24
DVI-MUTE
BUSY
B23
SUB-HIN
DVI-VGA
A24
DVI-RST
C23
EPM
C22
MAIN-HIN
B22
MAIN-AFT
B21
AGC-ATT
B20
I-SAP
O-SAP
C18
C21
SUB-FAT
C20
F-MONO
C19
ANT-M
C17
B16
C16
C9
B15
C13
C1-REG SW
WP-C
SDA-E
DAT1
B18
SCL-E
B17
CLK1
C15
STB-CLK
STB-DAT
C14
B-INT
B13
17V-DET
C12
POW-CTL
A12
MS-ACOFF
C10
FAN5
B10
FAN4
C8
FAN-CNT
C7
LAMP-CNT
LAMP-PRT
B7
HV-DET
C6
B6
A6
100/120W
C5
SP-MUTE
B5
SP-DC-PORT
C4
B4
KEY1
A4
LINK-LED
C3
TIMER-LED
B3
STBY-LED
A3
POWER-LED
C2
SIRCS
P-ON
LAMP-LED
LAMP COV
FAN-PORT
D-OVP
1
POWER-LED
4
P-ON
6
LA,P LED
7
TIMER LED
8
STBY LED
(T)
9
SW
10
SW
NC
SIRCS
NC
NC
NC
NC
B2
B48
SDA
SDA
S-LR
SCL
SDA
SCL
M-R
M-L
MS 3.3V
SW 3.3V
SW 1.8V
CB
Y
DIC-RESET
SYSTEM RESET
V-PULSE
Q8001
Q8002
CR
MS-R
MS-L
SCL
SDA
SCL
RF-AGC
ATF OUT
SAP IND
MODE
F MONO
DET OUT
DET OUT2
DA-EM OUT
DET OUT
AFT OUT
SCL
SDA
R OUT
L OUT
B46
9V
9V
A49
I MAIN Y/CV
A47
I MAIN C/CB
A45
I MAIN CR
B44
B42
2.5V
2.5V
B40
2.5V
A43
A41
I-SUB Y/CV
B38
I-SUB C/CB
B28
B30
I-BOARD RESET
A25
B-I2C-SDA-5V
B-I2C-SCL-5V
O-MS-AU-R-OUT
O-MS-AU-L-OUT
A27
A23
B17
MS3.3V
MS3.3V
3.3V
3.3V
B20
A21
I-MS/CNM-RESET
I-MS/CNM-AC-DET
B18
B22
A17
B12
B8
A13
NC
NC
NC
NC
NC
NC
SET 9V
SET 5V
B-MS/CNM-USB-D-
B-MS/CNM-USB-D+
I-MICOM-VP
A19
A15
I-BINT
B10
1.8V
1.8V
1.8V
5V
5V
B6
A11
A9
A7
A5
A3
B4
B2
O-DIS-Y
O-DIS-CB
O-DIS-CR
O-DIS-HS
O-DIS-VS
O-DIS-YS
1
4
MS
TO
ANTENNA
SWITCH
Q8006
9V
Q8022
BUFFER
Q8017
BUFFER
Q8015
BUFFER
Q8018
BUFFER
Q8016
BUFFER
Q8014
BUFFER
Q8052
BUFFER
HV DET
D8034
D8033
6
5
4
GND
TH.FUSE
TH.FUSE
CN8014
CN8002
CN8009
3
LAMP-COV
2
GND
1
CTL-1
CTL-2
AUDIO
IIC
HV-DET
HV-DET
LAMP-COV
AC-RLY(+)
AC-RLY(-)
KEY1
CONT-S IN
CONT-S OUT
BINT
10V-DET
ANT-SW1
SIRCS
DC PORT
MUTE
LAMP-COV)
POW-CTL
17V-DET
OVP
BINT
STBY-DAT
STBY-CLK
SCL
SDA
SDA-E
SCL-E
WP
C1-REG-SW
ANT-SW1
EPM
BUSY
RESET
VGA
DVI-MUTE
SYSTEM-RESET
CE
CNVSS
ATSC-TXDM
ATSC-RXD
3.3V RESET
CV/COMP-SW
ST 3.3V
DIC-RESET
V-PULSE
O-SAP
I-SAP
FMONO
AGC
AFT2
AFT1
M-HSYNC
S-HSYNC
HV-DET
LAMP-PRT
LAMP-CNT
FAN-CTL
FAN-PORT
Q8023
BUFFER
Q8029
HS DETECT
SET 5V
M-HSYNC
S-HSYNC
ATF2
AGC
Q8019
Q8021
Q8020
AFT1
I-SAP
FMONO
O-SAP
Q8030
HS DETECT
Q8027
BUFFER
Q8008,8009
Q8035-8037
Q8039,8041
CONTROL-S
Q8035-8037
Q8039,8041
CONTROL-S
INTERFACE
SET 5V
CN8005
CN8004
A2
S-ATT
Q8051
BUFFER
TU8002
MAIN TUNER
TU8001
SUB TUNER
IO CONVERTER
TANTENNA
SWITCH
VHF/UHF
AUX
SET 9V
SW 2.5V
Q8003
SW 3.3V
Q8025
BUFFER
Q8513
100/120W
TO DIC2 BOARD
TO U BOARD
CN9401
A
TO C2 BOARD
TO H2 BOARD
CN4502
B
TO T BOARD
CN3999
C
A BLOCK DIAGRAM (1 OF 2)
KF-42WE620/50WE620
97
KF-42WE620/50WE620
A (2/2) (TUNER/RELAY)
18
15
AU-17V
AU+17V
SP-DC-DET
SCL
SDA
SET 9V
17V
-17V
CN8903
VAR R
VAR L
L_OUT
R_OUT
GND
GND
SCL
SET 9V
13
14
SP-MUTE
12
R CH_OUT
10
L CH_OUT
8
6
SUR-L
5
SUR-R
3
2
1
4
9
SDA
GND
D8506
1
CN8003
CN8001
CN8023
CN8022
CN8021
CN8018
CN8020
CN8902
CN8007
3
LAMP-PRT
LAMP-CNT
100/120W
5
1
2
SDA-E
SCL-E
SET 5V
4
1
2
KEY1
SIRCS
1
2
SDA-E
SDA1
SCL O
SCL-E
4
3
SCL1
9
B-INT
10
SDA O
11
1
3
3.3V
SDA-E
SCL-E
6
4
C1REG-SW
7
WP
2
4
STBY-5V
5V
4V
7
6
4V
9
3.3V
A1
C1
10V-DET
HS3.3V OVP
17V-DET
4V
D6.5V
D6.5V
5V
A3
A2
POW-CTL
A4
SUB7V
A5
AC-RLY(+)
AC-RLY(-)
A7
A8,9
9V
33V
A26
10V
C26
A29
C29
A32
C32
AU-17V
AU-17V
AU+17V
AU+17V
9V
C8,9
4V
C12
A15,16
C15
5V
A18,19
C18-20
10V
A23-25
C23-25
A12,13
A6
11V
11V
1
2
2.5V
2.5V
3.3V
OVP
6.5V
7
5
1.8V
8
1.8V
9
MAIN-ON/OFF
11
13 I 15
DD-REG-SW
11V
19
18
10
6.5V
10
RESET
EPM
TXD
7
8
BUSY
6
SCLK
5
RXD
3
2
CE
CNVSS
1
3.3V
LAMP-PRT
LAMP-CNT
100/120W
SDA-E
SCL-E
SET 5V
KEY1
SIRCS
SDA-E
SDA
STBY-CLK
SCL-E
SCL
BINT
STBY-DAT
LVDS 3.3V
C1REG-SW
WP
STBY-5V
SET 5V
SET 4V
LVDS 3.3V
10V-DET
17V-DET
SET 4V
SET D6.5V
SET 5V
POW-CTL
AC-RLY(+)
AC-RLY(-)
SET 9V
TU 33V
17V
17V
SET 11V
SW 2.5V
SW 3.3V
SET 6.5V
SW 1.8V
SET 11V
3.3V RESET
EPM
ATSC TXD
BUSY
CV/COMP-SW
ATSCRXD
CE
CNVSS
ST 3.3V
4
1
3
3
WF-OUT(+)
WF-OUT(-)
1
2
2
FAN1-POW
FAN1-PROT
FAN2-POW
FAN2-PROT
FAN3-POW
FAN3-PROT
FAN4-POW
FAN4-PROT
FAN5-POW
FAN5-PROT
5
4
7
8
8
11
13
14
14
10
3
9
10
14
Q8510
INITICAL MUTE
Q8507-8509
DC DETECT
17V
11V DET
MUTE
Q8500
MUTE
Q8503
BUFFER
Q8504
BUFFER
LPF
IN+
OUT
FAN-CTL
SDA-E
SCL-E
OVP
FAN1-CTL
FAN2-CTL
FAN2-CTL
FAN-PROT
DC PROT
17V
IC8507
Q8005
MUTE
IC8504
WOOFER AMP
-17V
14
15
3
5
IC8010
DATA DECODER
IC8003
FAN CONTROL
IC8005
FAN CONTROL
D8031
Q8004
POWER OFFMUTE
STBY 7V
D8509
D8508
Q8512
MUTE
MUTE
SET 11V
Q8046,8049
BUFFER
4
4
1
3
4
1
3
Q8034,D8029
D OVP
SWITCH
Q8045,8045
BUFFER
Q8044,8047
BUFFER
4
1
3
IC8007
+3.3V REG.
1
3
IC8009
+3.3V REG.
1
2
4
IC8008
+5V REG.
4
5
CTL-1
AUDIO
IIC
CTL-2
L8011
D8035
(MS 3.3V OVP)
MS 3.3V
STBY 7V
LVDS 3.3V
STBY 5V
SRT 6.5V
SET 11V
SET 11V
SET 11V
Q8024
Q8017
D8004
NC
NC
NC
NC
NC
NC
NC
CN8022
CN8051
FAN1
FAN2
FAN3
WOOFER
SPEAKER
D8005
D8006
Q8026
Q8027
TO
G3 BOARD
TO AU BOARD
CN4702
D
TO G1 BOARD
CN1603
G
TO
C2 BOARD
TO
C2 BOARD
FOR CHECK
TO
C1 BOARD
TO H3 BOARD
CN44
F
TO H1BOARD
CN171
E
TO
LAMP
BLOCK
A BLOCK DIAGRAM (2 OF 2)
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