Philips NTX800 Service Manual page 39

CIRCUIT DIAGRAM - AMP BOARTD
RIGHT_IN
[1,2]
RIGHT
R77 NC
[1]
R10 22K
RIGHT
R88 8K2
C83
104
RIGHT_IN
[1,2]
-12V 0R
R89 RIGHT_IN
100u/16V
C113
signal reverse D4556
[1,2]
+12V
R85 8K2
C16 104
C1 104
100u/16V
C116
NC
LEFT_IN
[1,2]
R110
LEFT
[1] R87 NC
R108 0R
LEFT_IN
[1,2]
7-9
R83
470R
C306
68P
U26
OSC2
1 1A 1Y 6
[1]
R538
2 GND VCC 5
47R
3 2A 2Y 4
C310
68P
R539
47R 74HC2G04
R84
470R
R768
100k
R107
68K
R7153
C7102
1K
182
2 -
C309
1
3
C93 +
C7100 4 10U
R767 C7104
U707-A
8K2 1U
10U D4556 10U
R770
10K
C7105
R771
-12V
[1,2]
NC
47K
+
C7103
104
2.5KHz
[1,2]
R473
100K
R477 68K
2.5KHz
R506 C292
1K 182
6 -
7
5
+
R472 U707-B
8K2
D4556
R509
10K
C290
NC
+12V
[1,2]
+
R508 C305
NC
47K
C96
220P
10K
AMP_CLK4
R537 [2]
100R
+5V
[1]
R536
AMP_CLK3
[2]
R49
*120K1%
150P250V
adjustment input signal
COG CAP
AMP_CLK3
[2]
R541
reduce noise cap
10K
+VAA3
[1]
C97
220P
330R 3K/1%
R534
R535
U2
R148/R104 OCP(Q5법 직 괏 빱 ）
16
1 VAA CSH
15
2 GND VP
14
3 IN- HO
C24
C27
102
OSC
222 13
4 COMP VS
222
BAS316
100R C25
IC Pin5 = 5V
SD3 12
5 CSD VCC
[1]
10U/25v
R51
D11 C28
[1] 11
-VSS3 6 VSS LO
8K2 NX550 10K
10
7 VREF COM
R38
9
8 OCSET TD
R98/R99 OCP(Q2법 직 괏 빱 = 5 0 A ）
AMP_CLK4
[2]
R74
*120K1% C36
150P250V
adjustment input signal
COG CAP
reduce noise cap
+VAA4
[1]
330R 3K1%
R563
R564
U3
R148/R104 OIP(Q5법 직 괏 빱 ）
16
1 VAA CSH
15
2 GND VP
14
3 IN- HO
C41
C47
102
222
OSC
13
4 COMP VS
BAS316 222
100R
C42 IC Pin5 = 5V
SD4 12
5 CSD VCC
[1]
10U25V
R76
D16 C48
11
6 VSS LO
[1] -VSS4
8K2 NX550 10K
10
7 VREF COM
R63
9
8 OCSET TD
R98/R99 OCP(Q2법 직 괏 빱 ）
R80
10R
C91
104/100V
7-9
R48
1K1%0.25W
C19
R46
68K
R45
75K
NX550 47K
R44
SOD123
10K
IRFB4227PBF
D8
G
Q6
R43
2K
D21 R40
4R7
SOD123
R42
8K2
R41
C29
10R
22U/25V
L703
big noise
R142/R147 increase for EMI,
R35
but efficiency low， h eat to o in cr e ase
4R7
D22
R33
SOD123 4R7
R32
10R
G
R93 R34 Q4
NC
10R0.5W
IRFB4227PBF
To heatsink
-VE3
[1]
R73
1K1%0.25W
R71
68K
R70
75K
NX550 47K
R69
SOD123
10K
IRFB4227PBF
D13
G
Q8
R68
2K
D23
R65
4R7
SOD123
R67
8K2
C49
R66
10R
22U/25V
L704
big noise
R60 R142/R147 increase for EMI,
but efficiency low， h eat to o in cr e ase
4R7
D24 R58
4R7
SOD123
NC
R92
G
R59 Q7
10R0.5W
R57
10R
IRFB4227PBF
102
NC
C105
C106
-VE4
[1]
To heatsink
+VB3
[1]
L_R-
[2]
-
LT2
6TS:6TS
+
L_R+
[2]
Lo-R
-VB3
[1]
JK802-B
8
7
[1] CN2
HI_L-
HI_L- HI_L- 6
1
[1]
HI_L+
HI_L+ 5
2
JK802-C
9
3
JK802-A
[2]
LO_L- LO_L-
LO_L- 4
4
[2]
LO_L+ LO_L+
LO_L+ 3
5
2
CN703
[1]
HI_R-
HI_R-
1
1
[1]
HI_R+
2
L_R- L_R-
3
[2]
L_R+ L_R+
4
[2]
+VB4
[1]
LO_L+
[2]
+
6TS:6TS
LT3
LO_L-
-
[2]
Lo-L
P43
P32
-VB4
[1]