Block Diagram - Sony FDL-250T Service Manual

4-1.

BLOCK DIAGRAM

ANT
J101
EXT ANT
RF IN
IF AMP FILTER
IF
TU101
Q201 SWF201
TUNER
AGC
IC001
ELECTRONIC TUNING
VH/VL SW
Q012
HB
U/V SW VH/VL SW BS
28
COMPOSITION
Q010 Q011
LB
BAND
27
SW
UB
S601(1/2)
OFF/VHF/UHF
MB +5V
TU
VOLTAGE
DC AMP BT
SELECT 26
Q002 GENERATOR
Q001
RV001
18
UP
INITIAL
RV002 19
SET
VP
20
RV004
23
VA
S601(2/2)
OFF/VHF/UHF
UN4.5V
D607
F601
J701
IC600
L401
SWITCHING CONTROL
DC IN 4.5V
3 VCC 5
OUT
1 -IN
D605 OSC 7
DRY
BETTERY
BR/CTL 4
A
(TUNER,ELECTRONIC TUNING,VIF,SIF,POWER)
– 8 –
7
IF AMP
6
3
AGC
RV201
16
RF AGC
3
PULSE WIDTH
SET
MUTE
14
DEFECT 14
Q203
OUT PUT
TUNING
CONTROL
FM
CF202
15
DET
SIGNAL
MUTE
DEFECT
Q003,004 16
INPUT
CONTROL
5 17
COMPARATOR
S001 AFT
T201
CH -
AUTO
RETURN 6
21
23
AFT SW +5V
Q006,007
S002
INITIAL
CHARGE/
CH +
SET
DISCHARGE
10
15
4
BAR
30
OUT PUT
31
T601
1 +30V
D602
3
9
4
-10V
D603
SW REG OUT 2 +7.5V
8
Q600 D601
6
+5V
D604
7
CONT
UN4.5V
Q602
Vcc OUT Vcc CONT
+30V +5V
Q601 Q604,605
RV600
UN4.5V
+5V ADJ
CN201
1
IC201 BRT
VIF/SIF DET
-10V 2 -10V
4 IND
5 VHF
6 UHF
T202
7
VIDEO
45.75MHz
19 +5V 9
VIDEO 5V
DET +7.5V 10 7.5V
20
+30V 12 30V
14
HP
17
UNREG
V BUFFER
18 UNREG
Q801
UN4.5V
AUDIO AMP
BUFFER 13
Q803
CF203
10
LIMITER
VIDEO 18
AMP
SYNC V BUFFER
22
SEP
Q202
CF201
IND SW
Q005,008
CN501
1 SP
2 SP.GND
CN550
CN202
+5V 1 5V 1
2 BRT 2
IC501
4 AUDIO 4
AUDIO AMP RV550
5 AUDIO 5
VOL
7 AUDIO 7
10 AUDIO 10
2 -IN 6
OUTPUT
3
-IN V+ 7 UN4.5V
H
(HEAD PHONE,BRT/VOL VR)
– 9 –
IC302
Y/C/J
CN301
3
1 VIDEO IN R OUT 19
36 SYNC SEP
2 -10V
G OUT 21
4 39 SW
42 R IN B OUT 24
5
6 41 G IN
BUFFER
CONTRAST 2
7
Q304
9 +5V
SW
SW
10 +7.5V Q306
Q305
29 BRIGHT
12 +30V 13
TINT
14
INVERTER
34 SYNC IN
17
Q302 COMMON AMP 37
18 UN4.5V
SYNC OUT
35
IC403
LCD CONTROL
3
COMMON OUT 38
34 HSY/O
COMMON FRP 32 44 PFRP
SYNC SEP 2
30 VSY/I
33
Q401,402
FRP
35 Csync
IC401
VCO OUT 16
OSC
VCO IN 14
-
3 15 NPD
+
1
L401
25 OSC/O
STHL 13
O 4 26 OSC/I
STHR 14
CKV 16
CK1A 17
18
CK2A
CK3A 19
STV1 10
J801
STV2 11
A/V IN
3
OEH
OEV 4
INV/O 1
INV/I 2
Q1HA 8
LRA 40
SPEAKER
UDC 37
RV901
BRT
OSC 1
OSC SW
UN4.5V
Q701
Q703,704
UN4.5V
OSC 2
Q702
+5V
J550
B
HEAD
(Y/C/J,LCD CONTROL)
PHONE
CN401
STHL
1 STHL
OEH
2 OEH
3
Q1H
CK1A
4 CPH1
CK2A
RV301 5 CPH2
CK3A
CONT 6 CPH3
8 VB
9 VG
RV308
10 VR
TINT
12 L/R
RV302 TO
STHR
13 STHR
COMP AMP
MONITER
+5V 14 AVDD
IC301 15 VCOM
(LCD)
AMP
16 VGH
17 VCC
STV2
7 18 STVL
OEV
19
OEV
CKV
20 CKV
21 U/D
STV1
22 STVR
X301 24 VGL
3.58MHz
RV306
VCOM DC
VGH REG
+30V
Q303
-10V
D302
T701
2
3
FR701
8
4
1
9
5
– 10 –