Toshiba 20A43 Manuel d'entretien - Page 24

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Toshiba 20A43 Manuel d'entretien
A
B
8
FROM/TO MICON/CHROMA/TUNER
SCL
SDA
AUDIO_MUTE
P.CON+8V[B]
7
6
FROM/TO DEFLECTION/CRT
GND
5
FROM AV
REAR_AUDIO_R
REAR_AUDIO_L
FRONT_AUDIO_R
FRONT_AUDIO_L
GND
4
FROM TV POWER
SOUND+B
GND
SOUND_GND
3
FROM/TO MICON/CHROMA/TUNER
TU_AUDIO
GND
STEREO+5V
AUDIO_OUT_R
2
AUDIO_OUT_L
1
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
A
B
G-7
C
D
SOUND SCHEMATIC DIAGRAM
(MAIN PCB)
25
26
27
R311
1K
NC
3.5
3.5
2.6
2.6
0
5.0
5.0
0
3.4
2.2
3.4
3.4
24
23
22
21
20
19
18
17
16
15
14
13
GND
DAC
ZAP
IIC Decoder
St.PLL
Det
VCA
Det
AGC
OUT SW
Pilot
Input
SAP
Switch
L-R Filter
L-R Demod
Cancel
Matrix
De-Emph
Pilot
(L-R)/SAP
Filter
Filter
Filter
75us
L+R Filter
L+R Demod
Stereo
Noise
SAP
Filter
Cancel
SAPout
Demod
Filter
Filter
Offset
fH.2fH Trap Filter
SAP
Wide Band
Spectral
Expand
Cancel
Wide Band
RMS Det
Expand
RMS Det
Det
Offset
dbx De-Emph
Wide Band
Spectral
Spectral
Noise
Vcc
1
2
3
4
5
6
7
8
9
10
11
12
1.4
2.3
3.4
2.3
2.2
0.3
4.9
2.4
2.5
0.4
2.3
3.2
C910
10V
100
YK
W829
2.9
R1002
0
47K 1/4W
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
R308
1K
31
SOUND AMP IC
IC1001
AN7522N
28
+
-
-
L
R
1
2
3
4
5
6
7
8
9
10
6.3
8.5
0
8.6
3.9
2.4
0
2.5
2.1
8.5
C1003
1 B
HS1001
763WAA0160
MUTE SW.
Q1001
KTC3198
0
CAUTION
:SINCE THESE PARTS MARKED BY
ARE
CRITICAL FOR SAFETY,USE ONES
DESCRIBED IN PARTS LIST ONLY
E
F
G
C309
0.039
B
NC
NC
4.1
1.7
4.5
0
0
4.3
4.1
4.1
0
4.7
4.1
1
2
3
4
5
6
7
8
9
10
11
NC
NC
PF4
GND
PF1
AGC
L IN
PF2
PF3
LT
LB
Tone
Volume 2.2K
AGC
SURR
+
Control
Control
MODE
control
VCC
R IN
Vref
NC
NC
BB
RB
RT
BLD
TD
32
31
30
29
28
27
26
25
24
23
22
2.6
8.1
4.5
4.0
0
0
4.0
4.1
4.5
3.0
2.2
NC
NC
C1011
R1012
C1012
16V
47
KA
150 1/2W
R1013
16V
47
KA
150 1/2W
+
11
12
0
8.5
W865
CD1001
CP1001
CH14411A
A2502WV2-4P
SP OUT L+
4
4
SP OUT L-
3
3
SP OUT R-
2
2
SP OUT R+
1
1
33
32
ATTENTION
:LES PIECES REPAREES PAR UN
ETANT
DANGEREUSES AN POINT DE VUE SECURITE
N'UTILISER QUE CELLS DECRITES
DANS LA NOMENCLATURE DES PIECES
F
G
H
8
7
NC
NC
0
0
2.1
2.7
6.4
12
13
14
15
16
NC
NC
BD
VD
L ONT
+
Balance
/MUTE
+
6
NC
NC
R OUT
SDA
SCL
21
20
19
18
17
0
0
5.6
5.0
5.0
NC
NC
5
HEADPHONE JACK
J1001
MSJ-2000
7
6
4
2
3
4
5
1
SPEAKER
8 OHM
SP1001
SG05K07BRA
3
SPEAKER
8 OHM
SP1002
SG05K07BRA
2
PCB010
TMC563
AUDIO SIGNAL
1
H
G-8