Sound - Toshiba 20AF44 Service Manual

A B
8
FROM TUNER/STEREO
23
SW_AUDIO_L
7
22
SW_AUDIO_R
2.7K 1/4W
6
FROM CHROMA
5
P.CON+8V[B]
FROM/TO COMBI FILTER
GND
FROM/TO MICON
SDA
SCL
4
BBE_SW
VOLUME
TV_MUTE
FROM POWER
SOUND+B
GND
3
P.CON+12V
SOUND_GND
W858
2
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
1
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
A B
G-9
C
SOUND SCHEMATIC DIAGRAM
R302
R301 2.7K 1/4W
C309
0.039
B
NC NC
0
3.9 1.7 3.0 0 3.9 3.9 3.9 0 4.0
1 2 3 4 5 6 7 8 9
NC NC PF4 GND
PF1 AGC L IN PF2 PF3
Tone
Volume 2.2K
AGC SURR
+
Control
Control
MODE
control VCC R IN Vref
NC NC BB RB RT
32 31 30 29 28 27 26 25 24
2.3 7.9 4.5 4.0 0 0 4.0 4.0 4.4 3.0
NC NC
L301
100uH 0305
SOUND AMP IC
IC1001 AN17808B
+
-
ATT.CONT.
+ ATT. +
VOL
RIPPLE
FILTER
CH1 CH2 CH2
NC GND VOL MUTE GND VCC
RF
IN IN OUT
1 2 3 4 5 6 7 8 9
0 0.2 16.0 0 0.2 0 0.7 3.7 0 16.5
NC
W803
R1013
10K
R1009
MUTE
68K 1/4W
Q1001
KRC111SRTK
3.6
0
0
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)
NC NC
4.0 0 0 2.0 2.9 4.0
10 11 12 13 14 15 16
NC NC
LT LB BD VD L ONT
R305 C323
20K 0.0033
+
Balance
/MUTE
+
4.8 4.8 4.8 4.8
1 2 3
BLD TD NC NC R OUT SDA SCL
23 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 C324
R304
20K 0.0033 B
100 1/4W
+
-
25
STAND CH1
-BY OUT
10 11 12
12.7 0.7
C1001_1
50V 1 KA
R1003
22K
R1004
22K
C1002_1
50V 1 KA
26
27
HS1001
763WAA0215
ATTENTION CAUTION
:LES PIECES REPAREES PAR UN ETANT :SINCE THESE PARTS MARKED BY
DANGEREUSES AN POINT DE VUE SECURITE CRITICAL FOR SAFETY,USE ONES
N'UTILISER QUE CELLS DECRITES DESCRIBED IN PARTS LIST ONLY
DANS LA NOMENCLATURE DES PIECES
D E
F G
R307 C325
20K 0.033
B 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 C326
20K 0.033 B
CD1001
24
CP1001 CU14411A SPEAKER
A2502WV2-4P
SP1001
SG05K07BRA
4
4
8 OHM 5W
3
3
(L) 2.5W
2
2 SPEAKER
1
1 SP1002
SG05K07BRA
8 OHM 5W
2.5W
(R)
HEADPHONE JACK
J1001
MSJ-2000_AG
7
6
R1002
2
R1001 270 1/2W
3
270 1/2W
4
5
1
CAUTION: DIGITAL TRANSISTOR
ARE
F G
H
8
7
6
5
4
3
2
PCB010
TMC559
1
H
G-10