Sharp HT-DP2500W Service Manual page 17

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