Toshiba MD20F51 Service Manual page 54

A B
FROM/TO MICON/TUNER
8
SCL
SDA
A_MUTE
7
FROM POWER
W850 W837
SOUND+B
SOUND_GND
FROM REGULATOR1
GND
6
P.CON+12V
P.CON+9V
AT+5.6V
5
FROM STEREO
R301
A_OUT_L
2.7K 1/4W
R303
A_OUT_R
2.7K
4
3
2
NOTE:THE DC VOLTAGE AT EACH PART WAS MEASURED
1
WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST
WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.
A B
G-15
C D
SOUND AMP SCHEMATIC DIAGRAM
(AV PCB)
SOUND AMP IC
IC351 AN5276
+
+
-
-
ATT.CONT.
+ ATT. +
RIPPLE
FILTER
CH1 CH2 CH2 STAND CH1
NC GND NC MUTE GND VCC
RF
IN IN OUT -BY OUT
1 2 3 4 5 6 7 8 9 10 11 12
0 0 13.9 0 0 0 6.7 0.7 0 14.9 12.1 6.7
NC
R357
22K 1/4W
R353
10K 1/4W
HS351
763WAA0225
51
50
C309
0.033
B
NC NC
4.0 1.6 4.0 0 0 3.9 4.0 4.0 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
0.6 7.9 4.0 4.0 0.1 NC 0.1 NC 4.0 4.0 4.0 3.0
L301
100uH 0405
CAUTION
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
C D
E F
35
36
S802Y
NC NC
4.0 0 0 4.0 4.1 4.0
10 11 12 13 14 15 16
NC NC
LT LB BD VD L ONT
+
Balance
/MUTE
+
BLD TD NC NC R OUT SDA SCL
23 22 21 20 19 18 17
2.0 0 NC 0 NC 4.2 4.0 4.3
SW
Q301
KTA1504S_Y_RTK
0
5.0
3.9
D301
1SS133
R307
100 1/4W
ATTENTION
:SINCE THESE PARTS MARKED BY ARE :LES PIECES REPAREES PAR UN
CRITICAL FOR SAFETY,USE ONES
DESCRIBED IN PARTS LIST ONLY
E F
G
R CH
CP302 CD302
SPEAKER
213213102W1 C3123806
SP OUT R+ 1 1
SP352
SOUND GND 2 2 YDP4010-2
8 OHM
CD301 L CH
CP301
SPEAKER
213213102W1 C3123806
SP OUT L+ 1 1
SP351
SOUND GND 2 2 YDP4010-2
8 OHM
FROM/TO IN/OUT
SP_OUT_L
SP_OUT_R
SOUND_GND
SP_OUT_L2
SP_OUT_R2
AUDIO SIGNAL
ETANT
DANGEREUSES AN POINT DE VUE SECURITE
AUDIO SIGNAL(PB)
N'UTILISER QUE CELLS DECRITES
DANS LA NOMENCLATURE DES PIECES TUNER AUDIO SIGNAL
G
MD20F51/MD20F51C
H
8
7
6
5
4
3
2
PCB250
CME012
1
H
G-16