Sony TRINITRON KV-25FS12 Service Manual page 20

5-3. BLOCK DIAGRAM (1 OF 2)
J205 L
REAR
AUDIO
AUDIO
OUTPUT
R
S
C Y
3 4
1 2
J201
S-VIDEO
V
L
R
VIDEO
J202
FRONT A/V L
INPUT
AUDIO
R
TU101
TUNER
9V 9V
30V 30V
5V 5V
DATA
CLOCK
F MONO
MODE
SAP LED
ST LED
DET-OUT
VIDEO
AFT OUT
RF AGC
L OUT
R OUT
MUTE
CN601
2P
RY601
:MINI DGC RELAY
DGC
DGC 2
DGC DGC DRIVER
1
Q609
LOW B
T602
CN602 F601
AC IN
AC 1
AC 2
VDR601
D622
D4SB60L-F T604
SRT
AC RECT
STANDBY CIRCUIT
:STAND BY
1
D623
3
CONVERTER
4
Q605
D626
PROTECT 5 9
Q606
C636
6 8
RY602
RELAY SWITCH
AC POWER
Q608
STBY DRIVE
Q607
T603
1 18
5 16
4 15
+B +B
3 17
RECT
3
CONVERTER D
2 13
IC601
VIN 4
LOW B LOW B
14
S 2 RECT
OCP/FB
8 12
1 AUDIO AUDIO
7 11 RECT VCC
9 10
PH600
PHOTOCOUPLER R645
10k
4 1
ERROR AMP
3 2 2 1
+B
D605
IC602
D4SB60L-F
AC RECT
Q601,Q602
Q603
SW
1 5V REG
LOW B
IC604
(POWER SUPPLY)
(DEFLECTION)
(TUNER/IF)
(AUDIO)
(MTS)
AGC
Q101
10
VOL-CTRL VOL-CTRL 13 IN3+
MUTE
11
Q410 Q411 IN4+
7
AUDIO AMP IN1+
8
IC402 IN2+
1
OUT1+
4
OUT2-
17
OUT4+
14
OUT3-
T501
1 4
2
H DRIVE H OUT HV
3 6 1
Q501 Q502
200V 4
T505
FBT
2
7
FV
V HOLD 3
IN+1
CNTRL 7 SW 8
OUT2
G2
IC501 Q506,507
2
IN-1
9
5
IN+2
1
0
V OUT
OCP
IC502 11
ABL
Q505
3 5
REF OUT
6
+B
DF
H
0 5
1 7
T503
PIN DRIVE
Q503
PIN OUT
Q504
5 1
T504 3
4 2
2 I 9V REG O
5V LOW B 9V
IC603
CN502
— 22 —
CN460 CN450
MON-L MON-L
1 1 MUTE
MON-R MON-R Q430 Q431
2 2
3 VAR/FIX-R VAR/FIX-R 3
(AUDIO PROCESSOR)
4 VAR/FIX-L VAR/FIX-L 4
5 OUT-L OUT-L 5
OUT-R OUT-R
6 6
9V 9V 9V 9V
7 7
GND GND
8 8
29
9 YUV-L YUV-L 9 LINE B BUFFER
12
10 YUV-R YUV-R 10 LINE A Q432
5
11 V3-L V3-L 11 IN5A Q433
V3-R V3-R
12 12
39 28
V1-L V1-L IN2 OUT-B
13 13
2
14 V1-R V1-R 14 IN2A
13
AUDIO OUT-A
15 MUTE MUTE 15
PROCESSOR
16 N.C. N.C. 16
40
TV-L TV-L IN1 IC404
17 17
1
TV-R TV-R IN1A
18 18 18
3 SCL
V2-R V2-R IN3A
19 19
38
20 V2-L V2-L 20 IN3
19
SDA
(VELOCITY MODULATION)
CN902
CN901
CN506 VM
AMP VM OUT DRIVE
VM
5 VM VM 5
Q903 Q905 Q901
Q904 Q906 Q902
9V 4 9V 9V 4 9V
E
E E
3 3
VM
NC NC
2 2
+B 1 +B +B 1
VM
1 SPSW
2 VM
STBY 7.5V 3 STBY 7.5V
4 GND
I-PROT
5
DGC
6
7 RELAY
8 HP
9 MUTE
10 SEL1 CN2002
SEL0
11
12 GND
13 O-MONO
14 O-SAP
15 I-SAP
I-STEREN
16
MAIN1
17
18 MAIN2
19 AFT
20 AGC MUTE
1 I-HLDWN
HD
2
3 GND
4 ABL
5 EW
6 VD+
VD-
7
8 MONITOR
9 V3
10 O-VOL
CN2009
11 PIP-L
SDAT
12
SCL
13
SET5V 14 SET5V
30V 15 30V
SET9V 16 SET9V
17 V1
GND
18
19 Y1
20 C1
RELAY DRIVE
Q604
+
1
SPK R+
2 CN406
SPK R-
4P
3
SPK L-
4
SPK L+
+
1 R BACK
2 R GO
3
L BACK CN407
4
L GO
5 HP GND
LED-TIMER
1
D2001 2 POWER-SW
IR DETECT
2 1
3 IR(SENSOR)
IC2001
4 MENU-SW
CN2001
5 KEY-SW
STBY +5V
STBY +5V
6
V2(VIDEO2)
7
8 GND
J401
HEADPHONE
FUNCTION
SWITCH
1
R BACK
2 R GO
3 L BACK CN408
TP 508
4 L GO
V OUT
5 HP GND
6 V DY+
5 V DY-
4 H DY-
H DY-
3
2 H DY+
TP 506 H OUT
1 H DY+
CN501
BA5-902-BD
KV-25FS12 / 25FS12C
CN402
3P
SCL
1
A
2 GND
3 SDA
B
C
SPR
SPL
D