Digital Amplifier Circuit - Panasonic SA-HT330EB Service Manual

23.6. DIGITAL AMPLIFIER CIRCUIT

SCHEMATIC DIAGRAM - 21
DIGITAL AMPLIFIER CIRCUIT
DC_DET
1
HOP_DA
2
SW5V
3
MODE_SUR
4
LSURR
5
AGND
6
TO
RSURR
7
MAIN
MODE_FR
CIRCUIT 8
FRONTL
(CN2000) ON
9
AGND
SCHEMATIC
10
FRONTR
DIAGRAM-17
11
MODE_SW_C
12
CENTER
13
AGND
14
SUBWOOFER
15
M+9V
16
CN2002
1
TO FAN
2
CN2003
E2000
3
+27V_VDD
1
+27V_VDD
TO
2
GND
SMPS MODULE
3
CIRCUIT (CN2)
GND
4
ON SCHEMATIC
-27V_VSS
5
DIAGRAM-19
-27V_VSS
6
H2001/W2001
1
SURR_L
12
GND
11
SURR_R
10
GND
9
FRONT_L
TO
8
GND
MAIN
7
FRONT_R
CIRCUIT
6
(H2001/W2001) GND
5
ON SCHEMATIC
CENTER
4
DIAGRAM-17
GND
3
SUBWOOFER
2
GND
1
CN2001
5 9
6 8
7
2
L2701
J0JKB0000020
C2700 C2703 C2704
0.1 35V470 35V470
C2705
C2701 C2702
35V470
0.1 35V470
L2700
J0JKB0000020
23 25 27
22 24 26
C2533 10
C2534 10
C2433 10
C2434 10
C2633 10
C2634 10
: +B SIGNAL LINE
: -B SIGNAL LINE
DC_DET
HOP_DA
SW_5V
MODE_SUR
LSURR
S_GND
RSURR
MODE_FR
FRONTL
F_GND
FRONTR
MODE_SW_C
CENTER
C_GND
SUBWOOFER
+27V_VDD
C2706
35V470
C2707
35V470
-27V_VSS
DC_DET
R2808
47K
+27V_VDD
R2803
47K
SL R2802
47K
R2801
SR
47K
FL
R2800
47K
R2805
FR
47K
C R2804 R2806
47K
SW
R2809
-27V_VSS
85
: MAIN SIGNAL LINE
Q2800 Q2801
B1ABCF000176 B1ADCE000012
DC DETECT SWITCH DC DETECT SWITCH
D2800
B0ACCK000005
D2801
R2807
B0ACCK000005
10K
D2802
B0ACCK000005
10K
R2810 C2801 C2800
15K 10 10
10K
SA-HT330EB
Q2800
Q2801