Toshiba MD20FP3 Service Manual page 46

A B
8
FROM/TO MICON/TUNER
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
763WAA0215
51
50
C309
0.033
B
NC NC
4.0 1.6 4.0 0 0 3.9 4.0 4.0 0
1 2 3 4 5 6 7 8 9
NC NC PF4 GND
PF1 AGC L IN PF2 PF3
Tone
AGC SURR
+
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 0.1 4.0 4.0 4.0
NC NC
L301
100uH 9A06B
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
CAUTION
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
C D
E F
35
36
NC NC
4.0 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
+
Volume 2.2K
Balance
Control
/MUTE
+
BLD TD NC NC R OUT SDA SCL
23 22 21 20 19 18 17
3.0 2.0 0 0 4.2 4.0 4.3
NC NC
SW
Q301
KTA1504S_Y_RTK
0
5.0
3.9
D301
1SS133
R307
100 1/4W
ATTENTION
:SINCE THESE PARTS MARKED BY ARE
CRITICAL FOR SAFETY,USE ONES
DESCRIBED IN PARTS LIST ONLY
E F
G
FROM/TO SPEAKER
CP302
R CH
CD302
TID-X02P-M1
SPEAKER
CU123801
SP OUT R+ 1 1
SP352
SOUND GND 2 2 SG04H02BRA
8 OHM
L CH
CD301
CP301
SPEAKER
TID-X02P-M1 CU123801
SP OUT L+ 1 1 SP351
SG04H02BRA
SOUND GND 2 2
8 OHM
FROM/TO IN/OUT
SP_OUT_L
SP_OUT_R
SOUND_GND
SP_OUT_L2
SP_OUT_R2
AUDIO SIGNAL
:LES PIECES REPAREES PAR UN ETANT
DANGEREUSES AN POINT DE VUE SECURITE AUDIO SIGNAL(PB)
N'UTILISER QUE CELLS DECRITES
TUNER AUDIO SIGNAL
DANS LA NOMENCLATURE DES PIECES
G
H
8
7
6
5
4
3
2
PCB250
TMB561
1
H
G-16