Sharp DX-AT50H (serv.man21) Service Manual ▷ View online
– 29 –
DX-AT50H
Figure 29 BLOCK DIAGRAM (8/12)
S-VIDEO
OUT
OUT
COMPOSITE
VIDEO OUT
VIDEO OUT
2
1
3
4
DATA(VIDEO) SIGNAL
VIDEO SIGNAL
DATA(AUDIO) SIGNAL
IC1402 (VIDEO DRIVER)
51
52
55
56
57
12
27
33
32
DATA(VIDEO/AUDIO) SIGNAL
UDIO
ECODER
4dB
AMP
AMP
2dB
AMP
AMP
LPF
DRIVER
Y
C
DENC
SPDIF
PCM-LRCLK
PCM-SCLK
PCM-DATA0
PCM-BCK
2
33
4dB
AMP
AMP
2dB
AMP
AMP
LPF
DRIVER
30
4dB
AMP
AMP
2dB
AMP
AMP
LPF
DRIVER
4
21
4dB
AMP
AMP
2dB
AMP
AMP
LPF
DRIVER
18
4dB
AMP
AMP
2dB
AMP
AMP
LPF
DRIVER
16
14
25
34
27
W F 2
W F 3
W F 1
191
A-MUTE
190
ADAC-MD
ADAC-MC
ADAC-ML
189
192
4dB
AMP
AMP
2dB
AMP
AMP
LPF
DRIVER
6
24
2
2
VIDEO-Y
6
6
VIDEO-CB
4
4
VIDEO-CR
CN1602
CN1003
JK1401
TO AUDIO
BLOCK
DIAGRAM
BLOCK
DIAGRAM
POWER SUPPLY CBA
VIDEO-CB
OUT
OUT
VIDEO-Y
OUT
OUT
VIDEO-CR
OUT
OUT
JK1602
DX-AT50H
– 30 –
Figure 30 BLOCK DIAGRAM (9/12)
Audio Block Diagram
IC801 (AUDIO DAC)
7
8
1
1
1
2
3
13
14
15
16
SERIAL
PORT
SERIAL
CONTROL
4X/8X
OVERSAMPLING
DIGITAL FILTER
/FUNCTION
CONTROLLER
ENPHANCED
MULTI-LEVEL
DELTA-SIGMA
MODULATOR
DAC
LPF+AMP
L-CH
R-CH
LPF+AMP
DAC
ZERO DETECT
SYSTEM CLOCK
PCM-BCK
SPDIF
PCM-DATA0
PCM-LRCLK
ADAC-MD
ADAC-MC
ADAC-ML
PCM-SCLK
AUD
DATA(AUDIO) SIGNAL
A-MUTE
FROM
VIDEO
BLOCK
DIAGRAM
VIDEO
BLOCK
DIAGRAM
DVD MAIN CBA UNIT
– 31 –
DX-AT50H
Figure 31 BLOCK DIAGRAM (10/12)
7
8
12
11
DIGITAL
AUDIO OUT
AUDIO OUT
JK1202
AMP
Q1351
IC1201
Q1203
Q1201
Q1202
+3.3V
(AMP)
AUDIO-L
OUT
OUT
F+AMP
L-CH
R-CH
F+AMP
1
2
6
7
5
AUDIO-R
OUT
OUT
AUDIO SIGNAL
NAL
+3.3V
Q1204
W F 6
3
W F 4
W F 5
VREF
JK1201
DX-AT50H
– 32 –
Figure 32 BLOCK DIAGRAM (11/12)
Power Supply Block Diagram
AC1001
AC CORD
F1001
T1.6A L 250V
LINE
FILTER
L1001
D1001, D1002
D1004, D1005
D1004, D1005
Q1003
Q1008
Q1001
2
4
7
3
4
IC1001
ERROR
VOLTAGE DET
VOLTAGE DET
T1001
11
12
13
15
14
16
17
18
IC1006
(SHUNT REGULATOR)
SWITCHING
D1008
D1030
RECT
D1009
RECT
D1013
SWITCHING
CONTROL
LATCH
REG
1
2
6
BRIDGE
RECTIFIER
HOT
A V
F
HOT CIRCUIT. BE CAREFUL.
SCHO
BARR
SCHO
BARR
POWER SUPPLY CBA
CAUTION !
Switching power supply circuit is used in this unit.
If Main Fuse (F1001) is blown, check to see that all components in the
power supply circuit are not defective before you connect the AC plug to
the AC power supply. Otherwise it may cause some components in the
power supply cir cuit to fail.
If Main Fuse (F1001) is blown, check to see that all components in the
power supply circuit are not defective before you connect the AC plug to
the AC power supply. Otherwise it may cause some components in the
power supply cir cuit to fail.
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