Sharp DX-AT50H (serv.man11) Service Manual / Specification ▷ View online
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.
– 33 –
DX-AT50H
Figure 33 BLOCK DIAGRAM (12/12)
11
12
13
15
14
16
17
18
IC1006
ULATOR)
D1008
D1030
RECTIFIER
D1009
RECTIFIER
D1013
REG
+1.8V
REG.
5V
REG.
REG.
Q1014
Q1006
Q1002
CN1001
CN501
Q1011
Q1005
Q1004
IC1002
IC1003
Q1007
REG
(SHUNT REGULATOR)
SCHOTTKY
BARRIER
SCHOTTKY
BARRIER
P-ON+1.8V
EV+2.5V
P-ON+5V
EV+9V
EV+3.3V
P-ON+3.3V
PWRCON
EV+5V
P-ON+12V
EV+5V
P-ON+1.8V
1
1
P-ON+1.8V
2
2
CN1002
CN2001
EV+5V
9
9
EV+2.5V
3
3
EV+2.5V
4
4
P-ON+5V
5
5
P-ON+5V
6
6
EV+9V
19
19
EV+9V
20
20
EV+3.3V
15
15
P-ON+3.3V
16
16
P-ON+3.3V
17
17
P-ON+3.3V
18
18
PWRCON
14
14
EV+5V
21
21
EV+5V
22
22
P-ON+12V
27
27
FRONT CBA
DVD MAIN CBA UNIT
FROM
SYSTEM
CONTROL
BLOCK
DIAGRAM
SYSTEM
CONTROL
BLOCK
DIAGRAM
PWSW
4
4
PWSW
FROM
SYSTEM CONTROL
BLOCK DIAGRAM
SYSTEM CONTROL
BLOCK DIAGRAM
CAUTION
FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,
REPLACE ONLY WITH THE SAME TYPE T1.6A L 250V FUSE.
REPLACE ONLY WITH THE SAME TYPE T1.6A L 250V FUSE.
NOTE :
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
The voltage for parts in hot circuit is measured using
hot GND as a common terminal.
