Sharp HT-DP2500W Service Manual page 17

X451
8MHz
35 34 33
7 36
R465
1M
2.3V
OSC
32
2.1V
C476
OSC 31
220/16
5.2V
VDD 30
4.7V C473
A/D 29
0.082
4.7V C474
NS
28
3300P
4.7V
C475
D/A
27
0.082
4.7V
C472
26
DC-OUT
0.47/50
4.7V C471
25
DC-OUT
0.33/50
4.6V C468
GIC
L-OUT 24
10/50
4.6V C470
R-OUT 23
10/50
4.7V
C469
22
S-OUT
10/50
0V
GND
21
0.8V R464
IREF
20
39K
1.5V
DET 19
9.5V
C467
VCC
18
2.2/50
17
C466
220/16
2 13 14 15 16
R471
R463
18K
R472
C465
220/16
R469
R470
D452
D451
1N4004 1N4004
C535
C537
0.0033
1/50
(ML)
38 37 36 35 34 33
2 41 40 39
4.6V
LFCOM 32
4.6V
31
LFOUT
4.6V
LRIN 30
4.5V
29
LRCOM
4.6V
LROUT 28
4.6V
LVREF
27
0V
VSS
IC501 26
R528 1K
0V
CE 25
C75396N
R529 1K
0V
DI 24
PROCESSOR
R530 1K
0V
CL 23
4.6V
VREF 22
4.6V
RVREF 21
4.6V
20
RROUT
4.6V
RRCOM 19
4.5V
RRIN
18
4.6V
RFOUT 17
RFCOM
8 9 10 11 12 13 14 15 16
526
039
7
+B
+B
–B
100K
100K
+B
100K
100K
+B
C539
10/50
+B
C541
2.2/50
C543 C545
1/50 10/50
C547
C551
2.2/50
47/16
V_LATCH
V_DATA
V_CK
C553 C552
47/16 47/16
C548
2.2/50
C546
10/50
R555B
C544
220
1/50
C542
2.2/50
R554B
220
–B
+B
8
Figure 13 SCHEMATIC DIAGRAM (2/7)
Q531
2SC2878 B
H-MUTE
0V
R531
4.7K 0V
(0.7V)
R532
0V
22K
C554 0V
330/16
0V
R533
(0.7V)
0V
4.7K
H-MUTE
R587
3.9K
R581
R585
C585
2.2K
1K
0.022
10.9V
4 3 2 1
IC581
NJM4558D
6
5 7
R586
R582 C584
2.2K 1K 47P
IC581
R588
NJM4558D
3.9K
HEADPHON AMP.
C569
47/16
R571
2.2K
R572
2.2K
R555C
R567
220
8.2K
+B
R554C
220
R561
R565
2.2K 1K
C565
0.022
4 3 2 1
10.1V
R563 C561
100K 220P
IC561
NJM4558D
C562
R564
100K 220P
5 6 7
R566
1K
R562
2.2K
R568
+B
8.2K
C569B
47/16
4 3 2 1
IC431
NJM4558D
5 6 7 8
–9.9V
0V 0V
0V
C432
R550
C435
10/50
15K 2.2/50
+B
R438
150K
C436
0.022
IC431
NJM4558D
LOW PASS FILTER AMP.
9 10
– 13 –
SP_LEVEL
PROTECT
FAN_SW
+B
–B
1 1
C587
2 2
10/16
3
3
4 4
5 5
8
C588
10/16
C570
47/16
R600
1K
FRONT_L
C577
2.2/50
R598
1K FRONT_R
C578
2.2/50
C569C
47/16
C_MUTE
R569
R596
27K
3.3K
CENTER
R_MUTE
8 –9.9V
C566
0.022
R594
3.3K
C568
4.7/25
IC561
NJM4558D
BUFFER
C570C
47/16
SW_MUTE
C430
47P
R433
C431
47K
0.0068
C428
R434
4.7/50
1K
R435
47K
R436
47K
11
HT-DP2500W
16
15
21
D_GND
12
A+12V
18
A_GND
19
A-12V
20
1
2
R591
3
J581
100
HEADPHONES
4
5
R592
100
HEADPHONES
PWB-C4
1
FL_GND
2
F_MUTE
3
4
FR_GND
5
11
9
C_GND
10
14
REAR
12
R_GND
13
8
1
2
3
CNP5
SW
6
SW_GND
7
12