Read Sony FDL-252T Service Manual online
– 18 –
– 17 –
A BOARD : IC001 AN5707NFAP
A BOARD : IC501 NJM2070M-TE2
A BOARD : IC201 M51348AFP
8
7
6
5
1
2
3
4
NC
NC
V+
OUTPUT
POWER
GND
+INPUT
-INPUT
GND
300
BIAS
100k
50k
+
-
5
13
14
15
17
27
26
32
25
24
23
10
11
3
2
4
30
31
31
AFC
H.P.
M.M.
H.syn
VHA
VLA
NC NC
BT
CHA
C.S.
U/V
L/H
DBRT
CHCAL
DEF
STOP
BS
V OUT
U OUT
INITIAL RESET
AUTO
RETURN
COMPARATOR
PULSE WIDTH
SET
SIGNAL
DET
BT GENERATOR
BS ADD
BAR OUTPUT
TUNINNG
CONTROL
28
1
FH
6
SUD
CHARGE/
DISCHARGE
BAR DISPLAY
POSITION
ADJUST
INPUT
CONTROL
DEFEAT
OUT
BAND
SW
19
18
21
22
VLP
VHP
UP
CON
UA
20
12
MANU
16
9
NC NC
29
GND
7
20
14
15
16
11
10
E-VDL
FM DET IN.
LIMITER OUT
AFT COIL
REF COIL
GND
DC F/B
SIF IN
12
13
AUDIO OUT
AFT OUT
VIDEO OUT
8
9
6
5
IF IN
GND(VIF)
Vcc(SIF)
IF IN
Vcc(VIF)
7
22
23
SYNC OUT
SYNC SEP IN
REF COIL
24
IF AGC ADJ
4
2
1
RF AGC OUT
RF AGC DELAY
AGC FILTER 1
3
AGC FILTER 1
FM DET
BUFFER
VIDEO
DET
IF AGC
DET
2ND
AMP
AFT
1ST
AMP
LIMITER
AGC
SYNC
SEP
21
19
18
17
VIDEO AMP
A BOARD : IC600 MB3800PFV
8
7
6
5
1
2
3
4
-IN
FB
OSC
GND
OUT
SCP
VCC
BR/CTL
ERROR AMP
DTC 0.6V
0.5V
0.1V
REFERENCE
VOLTAGE
OUT PUT
DRIVE
CONTROL
CIRCUIT
SOFT START
S.C.P.
SAW-WAVE
GENERATOR
500
1.25V
36K
PWM COMP
0.3V
30K
+
-
-
+
-
+
-
1.0 Vp-p ( H )
1
3.5 Vp-p ( H )
2
0.8 Vp-p ( H )
3
• A BOARD WAVEFORMS
B BOARD : IC302 IR3Y29B4
B BOARD : IC301 NJM3414AV
8
2
3
4
1
6
7
5
A
B
38
39 40 41 42 43
44
45
47
46
48
37
36
35
34
33
32
31
30
29
25
24 23 22
21
20
19
18 17
15
16
14
13
26
27
28
SYNC SEP
BGP GEN
WINDOW
PULSE GEN
REG1
REG3
REG2
IDENT
KILLER
TRAP
AGC
HPF
COLOR
CLAMP
AGC AMP
AGC DET
AGC DET
PICTURE
INV
5
7
8
9
10
11
12
6
3
1
2
4
F/F
PAL SW
TINT
VCO
APC
PHASE
SHIFT
P
N
COMP
COMP
MATRIX
INT/EXT SW
INV
INV
VREF
DEMOD
R-Y G-Y B-Y
SYNC
IN
Y/C
Y/C
BGP
F/F
Y
R-Y
G-Y
B-Y
PAL
ON
P
N
N
P
CHROMA OUT
ACC FILTER
B-Y
R-Y
KILLER FILTER
BURST OUT
COLOR
COLOR
C IN
IDENT FILTER
VIDEO IN
CONTRAST
TRAP
PICTURE
AGC OUT
AGC FILTER
CLAMP
F ADJ
VCC1
G IN
R IN
B IN
SW
COMMON OUT
COMMON
AMPLITUDE
ADJUST
SYNC SEP
SYNC OUT
SYNC IN
FRP
SUB BRIGHT R
SUB BRIGHT B
BRIGHT
GAMMA 0
GAMMA 2
B DC DET
RGB AMPLITUED
ADJUST
COMMON
FRP
B OUT
VCC2
G DC DET
G OUT
R DC DET
R OUT
GND2
GND1
VCO OUT
APC FILTER
VCO IN
TINT
P
N P
N
AMP
AMP
< Conductor Side >
< Component Side >
– B Board –
B
Y/C/J, LCD CONTROL
[ ]
DIODE
*
UPPER LOWER
D301
C-2
3
D302
A-2
3
D401
A-3
3
TRANSISTOR
*
UPPER LOWER
Q302
A-2
2
Q303
C-2
2
Q304
B-2
2
Q305
B-2
2
Q306
B-2
2
Q401
A-3
2
Q402
A-3
!¶
Q701
C-1
2
Q702
C-1
2
Q703
B-1
1
Q704
B-1
1
IC
UPPER LOWER
IC301
C-1
IC302
B-2
IC401
C-3
IC403
C-3
VARIABLE RESISTOR
UPPER LOWER
RV301
B-2
RV302
A-2
RV306
C-1
RV308
B-2
B BOARD
UPPER : Component side
LOWER : Conductor side
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