Toshiba 20AF43 Service Manual - Page 26

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Toshiba 20AF43 Service Manual
A
B
8
FROM/TO TUNER/STEREO
SW_AUDIO_L
7
22
SW_AUDIO_R
6
FROM/TO CHROMA
5
P.CON+8V[B]
FROM/TO COMBI FILTER
GND
FROM/TO MICON
SDA
SCL
4
BBE_SW
TV_MUTE
FROM/TO POWER
SOUND+B
GND
3
P.CON+12V
SOUND_GND
W858
2
1
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.
A
B
G-9
C
SOUND SCHEMATIC DIAGRAM
23
R302
R301
2.7K 1/4W
2.7K 1/4W
C309
0.039
B
NC
NC
3.9
1.7
3.0
0
0
3.9
3.9
3.9
0
4.0
1
2
3
4
5
6
7
8
9
10
NC
NC
PF4
GND
PF1
AGC
L IN
PF2
PF3
LT
Tone
Volume 2.2K
AGC
SURR
+
Control
Control
MODE
control
VCC
R IN
Vref
NC
NC
BB
RB
RT
BLD
32
31
30
29
28
27
26
25
24
23
2.3
7.9
4.5
4.0
0
NC
0
NC
4.0
4.0
4.4
3.0
L301
100uH 0305
SOUND AMP IC
IC1001
AN5276
+
-
ATT.CONT.
+
ATT.
+
VOL
RIPPLE
FILTER
CH1
CH2
CH2
STAND
NC
GND
VOL
MUTE
GND
VCC
RF
IN
IN
OUT
1
2
3
4
5
6
7
8
9
10
0
0.2
16.0
0
0.2
9.6
0.7
3.7
0
16.5
NC
W803
R1013
10K
R1009
MUTE
10K 1/4W
Q1001
KRC111SRTK
3.6
0
0
CAUTION
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
C
D
E
(MAIN PCB)
NC
NC
4.0
0
0
2.0
2.9
4.0
11
12
13
14
15
16
NC
NC
LB
BD
VD
L ONT
R305
C323
20K
0.0033
+
B
Balance
/MUTE
+
4.8
4.8
4.8
4.8
1
2
3
NC
NC
TD
R OUT
SDA
SCL
22
21
20
19
18
17
2.0
0
0
4.0
3.5
3.5
NC
NC
20
19
18
4.8
4.8
4.8
4.8
R303
100 1/4W
R306
R304
20K
C324
0.0033 B
100 1/4W
+
-
25
24
CH1
-BY
OUT
11
12
12.7
15.2
C1001_1
R1003
15K
50V
1
KA
R1004
C1002_1
15K
50V
1
KA
26
27
HS1001
763WAA0215
ATTENTION
:SINCE THESE PARTS MARKED BY
ARE
: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
R307
C325
20K
0.033
B
R313
1K 1/4W
4.8
4.8
4.8
0
8.9
8.9
8.9
4
5
6
7
8
9
10
BBE
17
16
15
14
13
12
11
4.8
4.8
4.8
4.8
9.5
0
R308
20K
C326
0.033 B
SPEAKER
CP1001
A2502WV2-4P
SP1001
SG05K07BRA
4
4
8 OHM 5W
3
3
(L)
2.5W
SPEAKER
2
2
SP1002
1
1
SG05K07BRA
8 OHM 5W
CD1001
2.5W
CU14411A
(R)
HEADPHONE JACK
J1001
MSJ-2000
7
6
R1002
2
R1001
270 1/2W
3
270 1/2W
4
5
1
CAUTION: DIGITAL TRANSISTOR
ETANT
F
G
H
8
7
6
5
4
3
2
PCB010
TMC559
1
H
G-10