Sound Amp Schematic Diagram - JVC AV-20FD22 Service Manual

[ AV PWB(SOUND AMP) CIRCUIT DIAGRAM ]
A B
8
7
FROM/TO POWER
6
SOUND_GND
B301
SOUND+B
W4BRH3.5X6X1
GND
P.CON+9V
P.CON+A5V
FROM/TO MICON/TUNER
R302
POWER_ON_H
5
A_MUTE
SCL
SDA
4
FROM/TO AV SW
MONITOR_A_R
R301
MONITOR_A_L
3
2
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
NOTE: THE DC VOLTAGE AT EACH PART WAS MEASURED
1
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST
WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.
A B
AV-20FD22
C D

SOUND AMP SCHEMATIC DIAGRAM

SOUND_AMP
IC302 AN7522
+ - -
L R
1 2 3 4 5 6 7 8 9 10
8.0 4.6 0 4.6 4.5 1.4 0 1.4 2.0 4.4
C307 C348
0.01 0.01
B B
HS301
763WAA0199
R322
0
R326 100
0 MUTE
Q301
100 R321
2SC2412K
2.0
100
68K
R319 C324
R318 100 1/4W 100P CH
100 1/4W
C321
100P CH
C311 R310
0.033 B 1.8K C319
R303 C309 C315 C317 50V 2.2
3.3K 50V 2.2 KA 0.022 B 0.47 B
3.3K
4.4 4.4 4.4 4.4 4.3 4.3 4.4 0 4.0 4.3
1 2 3 4 1 5 6 7 8 9 0
VR5
1.8K VR3 TONE
136K
+ AMP1 I2C BUS
REF
-
INTERFACE
VR1 +
-
SIMAMP1
+
-
REF VOLAMP1 6.5K
6.5K
6.5K
VOLAMP2
+
REF
- CONTROL
-
SIMAMP2 +
6.5K
LOGIC
VR2
-
+
TONE
136K
AMP2
1.8K VR4 VR6
20 19 18 17 16 15 14 13 12 11
9.0 4.4 4.4 4.4 4.3 4.3 4.4 0 5.2 5.2
C302
L302 50V 2.2 KA C316 C318 R320
100uH
0.022 B 0.47 B 100K
0305
1/4W
C327
50V 2.2
C314 R312
0.033 B 1.8K C320
0.1
MMTV
L303
100uH 0305
CAUTION: SINCE THESE PARTS MARKED BY
CRITICAL FOR SAFETY,USE ONES
DESCRIBED IN PARTS LIST ONLY
C D
No.51821
AV-20FD22
E
(AV PCB)
+
11 12
0 4.4
37 38
0 MUTE
0 Q304
2SC2412K
0
C337
0 MUTE
Q303
0
1 B
2SC2412K
0
C340
1 B
R317
8.2K
R313
KA 1K
R324
8.2K
R325
KA
1K
ARE ATTENTION: LES PIECES REPAREES PAR UN ETANT
DANGEREUSES AN POINT DE VUE SECURITE
N'UTILISER QUE CELLS DECRITES
DANS LA NOMENCLATURE DES PIECES
E
2-25 2-26
F G
L CH
CP301 CD301
SPEAKER
TID-X02P-M1 CU123801
SP OUT L+ 1 1 SP351
MSF-18D5SB05-02
SP OUT L- 2 2
R CH
SPEAKER
SP OUT R+ 1 1 SP352
MSF-18D5SB05-02
SP OUT R- 2 2
CP302 CD302
TID-X02P-M1
CU123801
7
6
C301 R342
2
C305
16V 100 YK R337 100 1/2W
3
16V 100 YK 100 1/2W
4
5
1
C354
HEADPHONE JACK
J301
0.0022 B C355
HSJ2000-01-010
0.0022 B
PCB350
TMA503
AUDIO SIGNAL
AUDIO SIGNAL(PB)
TUNER AUDIO SIGNAL
F G
No.51821
H
8
7
6
5
4
3
2
1
H