Read Sharp DV-RW250H (serv.man4) Service Manual online
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B
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IC701
LA72646SM-MPB
HI-FI/AUDIO/CANAL SW IC
1
10
11
12
13
14
15
16
17
18
19
2
20
21
22
23
24
25
26
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77
78
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8
80
9
Q701
DTC124EKA
MUTE SW
IC702
NJM4580M
AMP
1
2
3
4
5
6
7
8
CAUTION: DIGITAL TRANSISTOR
Q702
DTA143EKA
DTA143EKA
MUTE SW
C709
4.7
50V
KA
C705
2.2
50V
KA
C706
2.2
50V
KA
C710
4.7
50V
KA
C713
47
16V
YK
C732
22
16V
KA
C724
22
16V
KA
C729
4.7
50V
KA
C707
10
25V
KA
C717
10
25V
KA
C720
10
25V
KA
C727
10
25V
KA
C734
0.1 F
C728
0.0047
B
C726
0.0056
B
C721
0.1
B
C738
0.01 B
C740
0.1 F
C735
470P CH
C749
0.022
B
C711
0.1
F
C712
1 B
C722
0.1
B
C715
0.01
B
C731
0.0056
B
C736
0.0047
B
C714
820P
CH
C741
0.0015 B
C743
100P
CH
C718
0.1
F
C716
820P
CH
C742
0.0015 B
C744
100P
CH
C750
1B
R701
47K
R704
4.7K
R711
47K
R709
47K
R708
1K
R703
47K 1/4W
R702
47K
R707
1K
R706
3.9K
R705
3.9K
R721
3.9K
R720
3.9K
R719
47K 1/4W
R718
47K 1/4W
R716
2.2K
R715
22K
R710
47K
R738
3.9K
R739
1.2K
R714
3.9K
R713
3.9K
R712
4.7K
R717
10K
R724
1K
R725
1K
R723
56
R727
100K
R728
10K
R730
10K
R734
12K
R732
12K
R735
15K
R737
1K
R726
100K
1/4W
R743
560
R744
560
R736
1K
R733
15K
R722
10K
R729
10K
R731
10K
R742
470
R740
680
R741
470
C733
47
6.3V
KA
C725
4.7
50V
KA
C730
22
16V
KA
C737
22
16V
KA C739
47
6.3V
KA
C703
2.2
50V
KA
C708
33
10V
KA
C719
330
16V
YK
C746
22
16V
KA
C745
22
16V
KA
C748
22
16V
KA
C747
22
16V
KA
C704
2.2
50V
KA
C701
10
25V
KA
C702
10
25V
KA
C723
10
25V
KA
Q704
KTC3875S_Y_RTK
AUDIO MUTE
Q703
KTC3875S_Y_RTK
AUDIO MUTE
L702
22uH 0305
L703
22uH 0305
L701
22uH 0305
DURING PLAYBACK.
MEASURED WITH THE DIGITAL TESTER
NOTE:THE DC VOLTAGE EACH PART WAS
CAUTION: DIGITAL TRANSISTOR
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
NORMAL_AUDIO_IN
NORMAL_AUDIO_OUT
HF1
HF2
AUDIO_MUTE-H
HF_COM
TU_AUDIO-R
TU_AUDIO-L
AT+5.2V
HIFI_H.SW
IIC_CLK
IIC_DATA
HIFI_H.SW
HIFI_ENV.DET
IIC_CLK
HIFI_REC_MUTE
AUDIO_MUTE-H
IIC_DATA
DEC_AUDIO-R
DEC_AUDIO-L
HIFI_AUDIO_OUT-R
HIFI_AUDIO_OUT-L
SWD_AUDIO-L
DVD_AUDIO_R
SWD_AUDIO-R
DVD_AUDIO_L
DVD_AUDIO_R
AT+5.2V
AT+5.2V
SWD_AUDIO-R
FRONT_AUDIO_IN-R
DVD_MUTE
HF2
TU_AUDIO-R
DEC_AUDIO-R
HF_COM
TU_AUDIO-L
HIFI_AUDIO_OUT-R
DEC_AUDIO-L
HIFI_AUDIO_OUT-L
DVD_AUDIO_OUT_L
HF1
DVD_AUDIO_OUT_R
HIFI_AUDIO_OUT-R
HIFI_ENV.DET
HIFI_AUDIO_OUT-L
FRONT_AUDIO_IN-L
FRONT_AUDIO_IN-R
HIFI_REC_MUTE
NORMAL_AUDIO_OUT
AT+5.2V
NORMAL_AUDIO_IN
AT+9V
SWD_AUDIO-L
P.CON+12V
FRONT_AUDIO_IN-L
GND
AT+9V
DVD_AUDIO_L
H-26
H-25
FROM/TO REGULATOR
FROM/TO DISPLAY
FROM/TO AV I/O2
FROM/TO 21PIN I/O
FROM/TO Y/C/AUDIO/H.AMP SECAM
NC
R-CH
IN SEL
IN SEL
L-CH
LIM
MIX
LPF
VCO
DEV
D0 DET
DET
ENV
COMP
BPF
L-CH
BPF
R-CH
LIM
COMP
PB AMP
PB AMP
REC-H
REC-H
DET
NOISE
NOISE
SW
PULSE
HOLD
LOGIC
PNR
R-CH
VREF
ALC
ALC
A GND
D.C
ALC
SW
D.C
A GND
ALC
SW
SEL
OUT
ALC
MUTE
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
0
NC
NC
NC
NC
NC
NC
NC
NC
NC
FROM/TO SYSCON/SERVO/TIMER
PCB010
VMD329
VMD329
+
-
-
A_GND
VCC
-
+
+
R
L
0
5.1
5.1
0
0
0
0
8.9
5.0
2.9
0
2.9
0
0
0.5
0
2.3
2.5
5.0
2.5
0
0.3
2.8
2.8
2.8
2.7
0.1
2.1
2.1
2.1
0
0
2.6
2.6
5.1
3.1
3.8
0
5.0
0
2.3
2.4
2.5
4.5
0
4.4
0.9
4.4
4.4
1.5
0.5
2.5
0
0
0
2.5
2.5
0
2.5
0
0
0
0
0.1
3.0
3.0
3.0
3.0
0.3
5.1
2.5
3.0
0
0
0
0
0
0
0
0
0
0
0
0
5.7
5.7
5.7
11.6
5.7
5.7
5.7
0.8
0
53
54
0
2.9
0
0
0
0
(VCR PCB)
Hi-Fi SCHEMATIC DIAGRAM
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