Sony KV-25FS12 Service Manual ▷ View online
— 21 —
KV-25FS12 / 25FS12C
5-2. PRINTED WIRING BOARDS AND
SCHEMATIC DIAGRAMS
SCHEMATIC DIAGRAMS
• All capacitors are in µF unless otherwise noted. pF : µµF 50V or less
are not indicated except for electrolytics and tantalums.
• All electrolytics are in 50V unless otherwise specifi ed.
• Indication of resistance, which does not have one for rating electrical
power, is as follows:
Pitch : 5mm
Rating electrical power : 1/ 4 W (CHIP: 1/10W)
• All resistor are in ohms.
KW = 1000W
MW = 1000KW
•
: 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.
• The components identifi ed by X in this basic schematic diagram
have been carefully factory-selected for each set in order to
satisfy regulations regarding X-ray radiation. Should replacement be
necessary, replace only with the value originally used.
satisfy regulations regarding X-ray radiation. Should replacement be
necessary, replace only with the value originally used.
• When replacing components identifi ed by Y, make the necessary
adjustments as indicated. If the results do not meet the specifi ed
value, change the component identifi ed by X and repeat the
adjustment until the specifi ed value is achieved (Refer to Safety
Related Adjustment on Page 14).
value, change the component identifi ed by X and repeat the
adjustment until the specifi ed value is achieved (Refer to Safety
Related Adjustment on Page 14).
5-1. CIRCUIT BOARDS LOCATION
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.
• When replacing the parts listed in the table below, it is important to
perform the related adjustments.
Part Replaced ( )
Adjustment ( )
DY, T505, CRT, IC501 C507,
C520, C505, C509, C515, T504,
T503, C551, L510, C546, C537,
C547, D517, D518, D519, R560,
R561, R562, R563, R565, R566,
R567, R525....................A Board
C520, C505, C509, C515, T504,
T503, C551, L510, C546, C537,
C547, D517, D518, D519, R560,
R561, R562, R563, R565, R566,
R567, R525....................A Board
IC1301........................MB Board
HV HOLD-DOWN
R564
R564
• All voltages are in V.
• Voltages are DC with respect to ground unless otherwise noted.
• Readings are taken with a 10MW digital multimeter.
• Readings are taken with a color-bar signal input.
• Circled numbers are waveform references.
•
*:
cannot be measured
•
:
B+line
•
:
B-line
•
:
Signal path
REFERENCE INFORMATION
RESISTOR : RN METAL FILM
: RC SOLID
: FPRD NONFLAMMABLE CARBON
: FUSE NONFLAMMABLE FUSIBLE
: RW NONFLAMMABLE WIREWOUND
: RS NONFLAMMABLE METAL OXIDE
: RB NONFLAMMABLE CEMENT
:
: 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
CAPACITOR : TA TANTALUM
: PS STYROL
: PP POLYPROPYLENE
: PT MYLAR
: MPS METALIZED POLYESTER
: MPP METALIZED POLYPROPYLENE
: ALB BIPOLAR
: ALT HIGH TEMPERATURE
: ALR HIGH RIPPLE
CAPACITOR : TA TANTALUM
: PS STYROL
: PP POLYPROPYLENE
: PT MYLAR
: MPS METALIZED POLYESTER
: MPP METALIZED POLYPROPYLENE
: ALB BIPOLAR
: ALT HIGH TEMPERATURE
: ALR HIGH RIPPLE
SECTION 5: DIAGRAMS
A Board
CB Board
K Board
MB Board
VB Board
KV-25FS12 / 25FS12C
— 22 —
BA5-902-BD
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2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
6
7
8
1
2
1
3
2
4
6
1
2
3
1
3
4
7
8
9
10
1
2
3
4
V
L
R
S
1
2
3
4
1
2
3
4
5
7
8
9
10
11
12
14
15
16
17
13
18
1
2
4
3
1
2
3
4
5
6
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
CN2002
CN2009
CN460
J201
CN406
CN450
D2001
CN601
CN501
T501
T504
J401
CN408
CN407
CN2001
CN506
CN402
T503
R645
D605
D626
C636
CN901
RY602
D622
T604
PH600
RY601
T602
F601
VDR601
T603
T505
S-VIDEO
4P
2P
:MINI
HEADPHONE
3P
10k
D4SB60L-F
AC RECT
RELAY
AC POWER
D4SB60L-F
AC RECT
SRT
:STAND BY
PHOTOCOUPLER
DGC RELAY
FBT
VIDEO
MAIN1
ST LED
I-STEREN
SAP LED
I-SAP
MODE
O-SAP
F MONO
O-MONO
GND
MAIN2
AFT OUT
AFT
RF AGC
AGC MUTE
9V
30V
5V
L OUT
R OUT
R OUT
MUTE
MUTE
C
Y
TV-L
TV-R
TV-R
FRONT A/V
VIDEO
AUDIO
L
R
V2-L
V2-R
CLOCK
DATA
V1-R
V1-L
YUV-R
YUV-L
AUDIO
L
R
J205
GND
9V
OUT-R
OUT-L
SEL0
SEL1
GND
GND
V1
O-VOL
TV-L
TV-R
TV-R
V2-L
V2-R
V1-R
V1-L
YUV-R
YUV-L
GND
9V
OUT-R
OUT-L
OUT-B
OUT-A
LINE B
IN5A
LINE A
IN2
IN2A
IN1
IN1A
IN3A
IN3A
IN3
J202
1
3
4
5
6
8
9
STANDBY CIRCUIT
Q606
PROTECT
Q605
CONVERTER
SWITCH
Q608
STBY DRIVE
Q607
RELAY DRIVE
Q604
RELAY
DGC
DGC
DGC
DGC
DGC
D
VIN
S
OCP/FB
+B
FV
G2
ABL
H
5
6
9
8
7
2
4
1
0
0
11
DF
HV
HD
EW
I-HLDWN
VD+
GND
I-PROT
STBY 7.5V
VD-
ABL
CONVERTER
IC601
5V REG
IC604
ERROR AMP
IC602
IC501
V HOLD
CNTRL
V OUT
IC502
IC502
AUDIO AMP
IC402
AC IN
SPR
SPL
+
+
TU101
MON-L
MON-R
MON-R
VAR/FIX-R
VAR/FIX-L
MON-L
MON-R
MON-R
VAR/FIX-R
VAR/FIX-L
H
E
A
T
E
R
6
SPSW
MONITOR
V3
9V
30V
5V
SET5V
SET9V
30V
9V
9V
9V
+B
9V
CN502
V3-L
V3-R
V3-R
V3-L
V3-R
V3-R
PIP-L
IR(SENSOR)
POWER-SW
LED-TIMER
GND
V DY+
V DY-
V DY-
H DY-
H DY-
H DY+
H DY+
H DY-
H DY+
H DY+
MUTE
N.C.
MUTE
N.C.
AUDIO
REAR
OUTPUT
INPUT
TUNER
DET-OUT
TP 506
H OUT
V OUT
+B
D
R
I
V
E
-
D
R
I
V
E
+
REF
OUT
IN+1
IN-1
OUT2
IN+2
O
U
T
1
SW
Q506,507
OCP
Q505
H OUT
Q502
H DRIVE
Q501
AUDIO
LOW B
VCC
+B
D623
MUTE
Q430
Q431
BUFFER
Q432
Q433
Q433
AMP
Q903
Q904
VM OUT
Q905
Q906
Q901
Q902
Q902
VM
9V
9V
E
NC
+B
+B
VM
9V
9V
E
NC
+B
+B
STBY 7.5V
VM
E
VM
VM
VM
HP
SPK R+
SPK R-
SPK L+
SPK L-
R BACK
R GO
L BACK
L BACK
L GO
HP GND
IR DETECT
IC2001
FUNCTION
SWITCH
R BACK
R GO
L BACK
L BACK
L GO
HP GND
PIN DRIVE
PIN OUT
Q504
Q503
RECT
+B
LOW B
RECT
RECT
AUDIO
IC404
AUDIO
PROCESSOR
(AUDIO PROCESSOR)
(POWER SUPPLY)
(TUNER/IF)
(AUDIO)
(DEFLECTION)
(MTS)
9V REG
IC603
AGC
Q101
TP 508
200V
DGC DRIVER
Q609
5V
9V
1
2
CN602
CN902
VM
DRIVE
(VELOCITY MODULATION)
LOW B
LOW B
Q603
Q601,Q602
SW
LOW B
19
18
13
28
5
12
29
39
2
2
40
1
3
38
1
3
38
1
2
I
O
2
1
2
4
3
1
1
7
3
5
5
1
2
7
3
13
7
8
8
10
11
11
1
4
17
14
17
14
2
1
AC
AC
AC
MUTE
IN3+
IN4+
IN4+
IN2+
IN1+
OUT1+
OUT2-
OUT4+
OUT2-
OUT4+
OUT3-
VOL-CTRL
Q411
VOL-CTRL
Q410
Y1
C1
SDAT
SET9V
30V
SET5V
SCL
SCL
GND
SDA
SCL
SDA
STBY +5V
V2(VIDEO2)
STBY +5V
KEY-SW
MENU-SW
5-3. BLOCK DIAGRAM (1 OF 2)
D
C
B
A
KV-25FS12 / 25FS12C
— 23 —
BLOCK DIAGRAM (2 OF 2)
BA5-902-BD
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9
1
2
3
4
5
6
7
8
9
CN1002
CN1004
CN1003
CN1001
CN1000
CN1303
CN705
3P
N/S COIL -
N/S COIL +
CN701
HV
RESET
GND
STBY 7.5V
I-PROT
GND
MAIN 1
MAIN 2
MAIN 2
AFT
AGC MUTE
O-MON0
O-SAP
I-SAP
I-STEREN
SEL-0
SEL-1
MUTE
HP
RELAY
DGC
Y/C JUNGLE
IC1301
CONTROL
TUNING SYSTEM
IC1001
VM
VD-
VD+
EW
ABL
HD
FOR JIG
IC1701
H
CN706
SPSW
MONITOR
V3
SET5V
SET9V
30V
SET5V
SET9V
30V
STBY 7.5V
IR(SENSOR)
POWER-SW
IK
IK
(Y/C/J)
(TUNING CONTROL)
X1304
BUFFER
Q1332,1327
Q1328,1329
Q1328,1329
BUFFER
BUFFER
Q1302
BUFFER
Q1313
BUFFER
Q1310,1311
Q1312
BUFFER
Q1001
X1001
BUFFER
Q1010
H
S
Y
N
C
H
M
A
I
N
Q1009
SEP
HSYNCH
VM OUT
Q1330
HP
Q1003
BUFFER
A
I
N
S
D
A
S
C
L
Y
O
U
T
C
O
U
T
C
K
I
N
VM
EW
ABLIN
HD
VD+
VD-
IK
R IN
B IN
G IN
B IN
G IN
R OUT
G OUT
B OUT
CRT DRIVE
IC702
Q701
N/S MUTE
Q700
N/S MUTE
2
4
1
3
FOCUS
KR 12
KB 10
KG 11
KB 10
KG 11
Q1336
BUFFER
IK BUFFER
Q1331,1350
R,G,B OUT
Q1317,1316
Q1315
Q1301
H TRAP
Q1011,1002
V DY(+)
V DY(-)
H DY(-)
H DY(+)
(CRT DRIVE)
PICTURE TUBE
IC1302
DIG COMB
FILTER
IC1002
HSYNCH SW
STBY +5V
REG
IC1305
MEMORY
IC1003
IC1304
VIDEO SW
Q1325,1326
G2
HEATER
6
1
CN704
(RGB DRIVE)
1
5
3
1
2
7
8
9
8
9
5
6
6
1
2 4
3
7
5
2
2
7
3
1
4 10
9 13
20
17
47
36
38
11
10
10
15
16
16
24
25
1
30
37
39
41
49
41
49
52
51
50
51
50
2
44
22
4
6
32
34
12
14
18
35
48
33
45
43
42
46
5
8
13
17
41
15
18
35
34
32
31
30
31
30
5
36
19
42
11
13
11
13
43
4
2
2
6
7
Q1354,1306
Q1307,1308
Q1307,1308
9
46
47
14
24
23
22
20
21
CONVERGENCE
IKIN
AFCFI
G2
FV
N/S DRIVE
O-VOL
I-HLDWN
SDAT
V1
GND
Y1
C1
C1
SCL
GND
PIP-L
LED
KEY-SW
MENU-SW
V2(VIDEO2)
STBY +5V
GND
B
-
D
A
T
B
-
C
L
K
B
-
I
N
T
G
N
D
N/S
H TRAP
NS MUTE
R
B
G
B
G
GND
GND
N/S
H TRAP
NS MUTE
R
B
G
B
G
GND
GND
SCL
GND
SDA
STBY +5V
I-RMCN
I-POWER
O-LED
I-KEY
I-MENU
O-N/S
O-H TRAP
I-CVIN
I-HLDWN
O-YUYSW
I-VPN
I-HP
O-HSYSW
I-HSYNC
I-HSYNC
O-OSC
I-RESET
O-SCLN
I-SDAT
O-YM
O-OSDBLCK
O-R
O-G
O-G
O-B
O-SEL1
O-SEL0
O-SEL0
V
1
V
0
VIDEO1
V
O
U
T
S
1
Y
1
CVBS2
HP PROTECT
SDA
SCL
YS2/YM
YS2/YM
R2IN
G2IN
B2IN
G2IN
B2IN
VTIM
YUYSW
XTAL2
XTAL3
COMB Y
COMB C
MONOUT
Y1
V/FSC
C1
NS IN
M
A
I
N
T
V
O-MUTE
O-RELAY
O-DGC
I-PROT
I-AFT
O-AGCMUTE
O-AGCMUTE
O-MONO
I-STEREN
O-SAP
I-SAP
V
I
D
E
O
2
O
-
B
C
L
K
N
1
-
B
I
N
T
O
I
-
B
D
A
T
I-DSC
ROUT
GOUT
BOUT
GOUT
BOUT
A
B
C
D
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