Toshiba 20AF42 Service Manual page 25

A B
8
FROM AV
SW_AUDIO_R
SW_AUDIO_L
7
6
5
FROM/TO MICON/TUNER
SCL
SDA
BBE_SW
TV_MUTE
4
FROM POWER
P.CON+5V
P.CON+9V
SOUND+B
GND
SOUND_GND
3
2
NOTE: NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
THE DC VOLTAGE AT EACH PART WAS MEASURED
1
WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.
A B
C D
SOUND SCHEMATIC DIAGRAM
(MAIN PCB)
22 R314
23 6.8K R324 C334
1.8K 0.033 B
C332
C331 0.47 B
0.022
B
5.0 5.0 5.0 5.0 4.8
1 2 3 4
1.8K VR3
136K
+
REF
-
VR1
SIMAMP1
+
-
REF VOLAMP1
6.5K
VOLAMP2
+
REF
-
SIMAMP2
6.5K
VR2
-
+
136K
1.8K VR4
20 19 18 17
10.0 5.0 5.0 5.0 4.8
C330 C333
0.022 B 0.47 B
R320
6.8K
R325
1.8K 0.033 B
L301
47uH
SOUND AMP IC
IC1001 AN5276
+
+
-
-
ATT.CONT.
+ ATT. +
RIPPLE
FILTER
CH1 CH2 CH2 STAND
NC GND NC MUTE GND VCC
RF
IN IN OUT -BY
1 2 3 4 5 6 7 8 9 10 11
0 0 13.9 0 0 0 6.7 0.7 0 14.9
NC
R1013
10K
R1009
MUTE
10K Q1001
3.6 KRC111SRTK
0
0
HS1001
763WAA0215
CAUTION: SINCE THESE PARTS MARKED BY ARE
CRITICAL FOR SAFETY,USE ONES
DESCRIBED IN PARTS LIST ONLY
C D
E
R326
100 1/4W
R328
100
4.7 4.8 0 4.8 4.7
5 6 7 8 9 10
VR5
TONE
R301 C306 R303
AMP1
I2C BUS
INTERFACE
+
20K 0.0033 20K
-
B
6.5K
6.5K
- CONTROL
+
LOGIC
4.8 4.8 4.8 4.8 4.8
TONE 1 2 3 4
AMP2
VR6
16 15 14 13 12 11
4.7 4.8 0 5.0 4.9
C339
0.01 B
C303 20 19 18 17
C335
4.8 4.8 4.8 4.8 4.8
16V 47 YK
R302 R304
R327
20K C307 20K
0.0033 B
100K
24
25
CH1
OUT
12
12.1 6.7
C1001
R1003
5.6K 50V 10 YK
C1002
R1004
5.6K 50V 10 YK
26
27
ATTENTION: LES PIECES REPAREES PAR UN ETANT NOTE:
DANGEREUSES AN POINT DE VUE SECURITE
N'UTILISER QUE CELLS DECRITES
DANS LA NOMENCLATURE DES PIECES
E
F G
C308
0.033
B
R335
1K 1/4W
4.8 4.8 0 8.9 8.9
5 6 7 8 9 10
BBE
16 15 14 13 12 11
4.8 4.8 4.8 9.5 0
C309
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
AUDIO SIGNAL
CAUTION: DIGITAL TRANSISTOR
THE RESISTOR MARKED F IS FUSE RESISTOR.
THE ALUMI ELECTROLYTIC CAPACITOR MARKED NP
IS NON POLAR ONE.
F G
H
8
7
6
5
4
3
2
PCB010
TMA532
1
H