Toshiba 20AS21 Service Manual - Page 19

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Toshiba 20AS21 Service Manual
A
B
8
FROM TV POWER
UNREG+12V
7
6
FROM/TO SOUND/AV
5
R612
AUDIO_OUT
100 1/4W
C642
AUDIO_IN
50V
1
KA
W827
GND
5
R632
220
W817
FROM/TO MICON/TUNER
4
Y_VIDEO
AT+5V
SYNC
TUNER+5V
RESET
AFT
AGC
L601
IF
1.2uH
R604
2.2K
3
GND
HD
POWER
OSD_B
OSD_BLK
OSD_G
2
VD
OSD_R
I2C_OFF
SDA
SCL
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
1
A
B
C
CHROMA SCHEMATIC DIAGRAM
6
7
CF604
8.8
REG
5.5
TPSRA4M50C00-A0
Q603
KTC3203_Y
4.9
R615
CF603
EFCT4R5YS5A
470
NC
3.0
2.2
0
7.9
7.9
0
0
48
47
46
45
44
43
42
41
R634
R611
10K
10K
2.3
AUDIO OUT
2.4
C604
AUDIO BYPASS
2.2
50V
1
KA
C655
EXT AUDIO IN
3.0
C623
0.0033 M
0.0068 Y
FM DIRECT OUT
46 SW REG CONT
2.9
C632
50V
2.2
KA
47 LIMITER IN
VIF VCO F/B
R618
10M 1/4W
48 IF AGC
3.2
49 QIF OUT
VREG Vcc
8.7
VIF APC FILTER
CHROMA IC
3.2
VIF VIDEO OUT
2.2
VIF GND
0
C621_1
0.01 Y
0
AFT OUT
C626
1.9
64 VIF IN (1)
QIF IN
1 VIF IN (2)
R606
0.001 Y
2.8
RF AGC OUT
10K
4.6
C606
RF AGC FILTER
SAW FILTER
2.9
CF601
50V
0.22
KA
SAFGP45M7VHCZR
IN
IN
G
OUT
OUT
1.5
1
2
3
4
5
1
2
3
4
5
6
7
8
1.5
4.9
4.9
0
4.9
0
0
C609
0.01 F
8
CAUTION:
NOTE:
THE DC VOLTAGE AT EACH PART WAS MEASURED
WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST
WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.
C
D
E
(MAIN PCB)
REG
REG
Q605
Q604
KTC3203_Y
KTC3203_Y
4.9
7.2
7.2
4.9
REG
Q606
5.5
5.5
KTC3203_Y
7.9
11.3
8.5
R639
100
R638
12K
R646
27K
5.7
0
5.6
0
0
2.5
3.2
1.9
8.5
C638_1
40
39
38
37
36
35
34
33
16V
22
KA
3.3
R642
D605
ACL/ABCL
2.6
1K
11E1-EIC
R IN
0
V PULSE OUT
4.7
G IN
34 EXT C in
0
33 8.7V REG OUT
FAST BLK
32 X'TAL
C645
0
SPOT KILLER
NC
16V
47
7.0
YK
fsc OUT
NC
2.8
IC601
M61206FP
4.9
VIDEO CHROMA Vcc
4.9
C613_2
V RAMP CAP
R641
63V
1
MKT
4.7
V RAMP FEEDBACK
2.8
27K +-1%
17 V OUT
B IN
16 B OUT
0
STRAT UP Vcc
7.9
10
7.9
W818
V OUT
3.6
9
10
11
12
13
14
15
16
0
0
4.9
3.4
3.9
4.9
2.0
2.0
2.0
9
R627
100
R630
100
R631
100
SWITCHING
Q607
DTC114ES
0
4.9
0
SINCE THESE PARTS MARKED BY
ARE
ATTENTION:
LES PIECES REPAREES PAR UN
CRITICAL FOR SAFETY,USE ONES
DANGEREUSES AN POINT DE VUE SECURITE
DESCRIBED IN PARTS LIST ONLY
N'UTILISER QUE CELLS DECRITES
DANS LA NOMENCLATURE DES PIECES
D
E
F
G
FROM SOUND/AV
C647
VIDEO_IN
50V
1
KA
FROM/TO DEFLECTION/CRT
V_OUT
ABCL
V_FEEDBACK
GND
H_OUT
H_SYNC
B.OUT
G.OUT
R.OUT
CLAMP
TEST POINT
CP601
R613_1
B.OUT
560 1/2W
INT.MONI
IIC_OFF
SDA
SCL
GND
CAUTION: DIGITAL TRANSISTOR
ETANT
F
G
H
8
7
6
5
4
3
173979-6
6
5
DEFLECTION SIGNAL
4
AUDIO SIGNAL
3
LUMINANCE SIGNAL
2
2
TUNER VIDEO SIGNAL
1
R.SIGNAL
G.SIGNAL
B.SIGNAL
PCB010
TMA511
1
H