Toshiba 20A46C Manual de servicio - Página 25

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Toshiba 20A46C Manual de servicio
A
B
8
FROM/TO MICON/CHROMA/TUNER
SCL
L901 100uH 0305
SDA
AUDIO_MUTE
VOLUME
7
6
FROM/TO DEFLECTION/CRT
5
GND
FROM AV
REAR_AUDIO_R
REAR_AUDIO_L
FRONT_AUDIO_R
FRONT_AUDIO_L
GND
4
FROM POWER
SOUND+B
GND
SOUND_GND
FROM MICON/CHROMA/TUNER
3
FSC
AV1
AV2
P.CON+5V
P.CON+9V
GND
2
1
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
A
B
G-7
C
SOUND SCHEMATIC DIAGRAM
R914
2.2K
1/4W
C903
1
B
S808X
W846
R1018
W862
47K
1/4W
R1002
47K
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)
R906
22K
R913
1K
6.1
6.1
2.4
0
3.8
8.8
3.7
3.7
3.7
3.8
3.8
3.8
36
35
34
33
32
31
30
29
28
27
26
25
FILTER
MODE OUT
REGULATOR
ALC
Adj.
VREF
-6dB
LPF
MATRIX
L+R
PILOT
L-R
L-R/SAP
LPF
LEVEL DET
DEMOD
ST/SAP SW
STEREO
PILOT
CANCELLER
PLL
To EACH SYSTEMS
SAP
LPF
DEMOD
ST DET
PILOT DET
SAP DET
SYSTEM
SAP
LPF
CONTROL
DET
SAP
BPF
IIC
SIF DEMOD
DECODE
GND
1
2
3
4
5
6
7
8
9
10
11
12
3.8
3.7
3.8
3.8
3.7
0
5.6
0
2.7
0
4.9
4.8
2.3
NC
NC
C950
1
B
25
R904
100 1/4W
SOUND AMP IC
IC1001
AN17822A
+
-
L
31
28
1
2
3
4
5
6
6.3
8.5
0
8.6
3.9
2.4
0
C1015
1
B
C1022
1
B
HS1001
763WAA0160
R1021
2.9
MUTE SW.
Q1001
27K
0
2SC3052
0
2.9
0
MUTE SW
0
Q1003
2SC3052
ATTENTION
:LES PIECES REPAREES PAR UN
DANGEREUSES AN POINT DE VUE SECURITE
N'UTILISER QUE CELLS DECRITES
DANS LA NOMENCLATURE DES PIECES
D
E
F
G
C937
16V
10
KANP
LCH AUDIO SW IC
NJM2534V
IC902
4.6
5
BUFFER
0
3.8
3.8
3.8
3.8
4.2
4.6
24
23
22
21
20
19
BAIAS
5.1
dbx
RCH AUDIO SW IC
IC903
NJM2534V
Offset
Cancell
4.6
5
BUFFER
13
14
15
16
17
18
3.2
1.9
4.4
3.8
3.8
4.6
BAIAS
5.1
C1011
C1012
16V
47
KA
16V
47
KA
-
+
R
7
8
9
10
11
12
2.5
2.1
8.5
0
8.5
33
SP OUT R+
SP OUT R-
SP OUT L-
SP OUT L+
32
CAUTION
ETANT
F
G
H
8
27
R916
22K 1/4W
7
0
3.5
8.2
4.3
6
0
26
R915
3.5
22K 1/4W
8.2
4.3
5
HEADPHONE JACK
7
J1001
MSJ-2000_AG
6
R1012
4
2
100
1/2W
R1013
3
100
1/2W
4
5
1
CD1001
CP1001
SPEAKER
CH14411A
A2502WV2-4P
8 OHM
SP1001
R
1
1
YDP512-22
3
2
2
SPEAKER
3
3
8 OHM
4
4
L
SP1002
YDP512-22
2
PCB010
CME026
1
:SINCE THESE PARTS MARKED BY
ARE
CRITICAL FOR SAFETY,USE ONES
DESCRIBED IN PARTS LIST ONLY
H
G-8