Main Circuit (2/4) - Panasonic SC-HC20GA Service Manual

17.3. MAIN CIRCUIT (2/4)

15 16 17
SCHEMATIC DIAGRAM - 3
MAIN CIRCUIT
: +B SIGNAL LINE
C120
R125
1000p 2.2K
C121
R126 C119
1000p 4.7K 22
L106
J0JYB0000013
1
C266 C267
0.33 0.33
2
R249
J0JYB0000013
R250 L105
560
3
R251
47K
R260
100K
R451
47K
4
R450
560
R460
100K
L107
5
R449
C466 C467
J0JYB0000013
0.33 0.33
6
7
8
R261
33
TO MAIN
SECTION (1/4)
Q101
B1GFGCAA0001
MUTING SWITCH
C265
0.01 6
R121
1K
5
4
C465
0.01
R462
R461
33
P1
P102
MPORT_L 1
TO AGND 2
HEADPHONE/ MPORT_R 3
MPORT_SW
AUX CIRCUIT 4
(P908) IN HP_L 5
SCHEMATIC
HP_GND 6
DIAGRAM - 7 7
HP_R
HP_SW 8
18 19 20
: CD AUDIO INPUT SIGNAL LINE : iPod/iPhone/AUX AUDIO INPUT SIGNAL LINE
PDET2
LCH
RCH
C269
Q103
470P
B1ABCF000176
AMPLIFIER
C25
C268 R264
1000p 0.12 27K
LCH
R252
L105 R265 VCC_GND
4.7K
J0JYB0000013 4.7K
C18
R1 0.1
1K
MUTE_AMP
C469
470P
R465
4.7K DAMP_STBY
R452
4.7K
R464
C468
0.12 27K
RCH
C23
0.01
C26
1000p
VCC_GND
Q104
B1ABCF000176 L7
J0JKB0000020
AMPLIFIER VCC
L108
L107,L108
J0JYB0000013
DAMP_BP
HP_L
HP_GND
R262
HP_R
33
Q102
B1GFGCAA0001
MUTING SWITCH
1 6 1
R124
1K
2 5 2
3 4 3
QR2
B1GBCFJJ0051
SWITCH
33
MPORT_L
VCC_GND
MPORT_R
MPORT_SW
HP_L
HP_GND
HP_R
HP_SW
21 22 23
: AUDIO OUTPUT SIGNAL LINE : AM/FM SIGNAL LINE
IC1
C1AB00003282 IC1
POWER AMPLIFIER
QR4~QR5
1 GND AVCC 42
B1GBCFJJ0051
INVERTER
C1 1
2 INB1 INB2 41
C2 1
3 INA1 INA2 40
R2
0
QR4
4 MUTEL VREF 39
5 STBYL PROT 38
QR5
6 VSA1 VSA2 37
R7 L1
R6
100K 33K G0A220GA0002
7 SUB OUTA2 36
L1
8 OUTA1 VDA2 35
C17 C22
16V2200 0.01
9 VDA1 HBA2 34
C19
VCC_DAMP
0.47
10 HBA1 SUB 33
11 SUB NC 32
12 NC HBB2 31
30
13 HBB1 VDB2
C10
0.47
14 VDB1 SUB 29
L2
G0A220GA0002
L2
15 OUTB1 OUTB2 28
C9 C11
0.47 0.47
16 VSB1 VSB2 27
17 TEST2 TEST1 26
18 ROSC GAIN2 25
R8 R5
19 RLMT GAIN1 24
R4 47K 1K
18K
20 VD CLK 23
C12
R3 21 DVDD RREF 22
8.2K
10
TO MAIN
SECTION (4/4)
87
24 25 26
C5 10
R10 C24
47K
0.1
C3 1
R11
C4 1
22K
R12
R9
C6 10
100K
J0JYB0000013
L6
G0B9R5K00007
3 4
C14
C20
0.47
0.47
L3
G0A220GA0002 1 2
C13
0.47
1 2
3 4
L5
G0B9R5K00007
C15
0.47
C21
0 4 . 7
L4
L4
G0A220GA0002
C16
0.47
K5...GN
0
K6...GA
0
1/4 2/4
3/4 4/4 SC-HC20GA/GN MAIN CIRCUIT
27 28
A
B
C
P2
TO
4 Lch LO+ BRIDGE 2
3 Lch LO- CIRCUIT
(P906) IN
2 Rch LO+
SCHEMATIC
1 Rch LO- D
DIAGRAM - 8
E
F
G
H