Service manual

ABC D E F GH
ABC D E F GH
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1
3
4
5
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1
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IC701
LA72646SM-MPB
HI-FI/AUDIO/CANAL SW IC
1 10111213141516171819
2 20
21 22 23 24 25 26 27 28 29
3
30 31 32 33 34 35 36 37 38 39
4
40
414243444546474849
5
50515253545556575859
6
60
616263646566676869
7
70717273747576777879
8
80
9
Q701
DTC124EKA
MUTE SW
C732
2216V KA
C713
4716V YK
C724
2216V KA
C729
4.750V KA
C717
1025V KA
C720
1025V KA
C727
1025V KA
C709
4.750V KA
C705
2.250V KA
C706
2.250V KA
C710
4.750V KA
C707
1025V KA
C740
0.1 F
C736
0.0047 B
C749
0.018 B
C711
0.1 F
C712
1B
C722
0.1 B
C715
0.01 B
C731
0.0056 B
C734
0.1 F
C738
0.01 B
C735
470P CH
C728
0.0047 B
C726
0.0056 B
C721
0.1 B
C750
1B
C733
476.3V KA
C737
2216V KA
C739
476.3V KA
C725
4.750V KA
C730
2216V KA
C701
1025V KA
C702
1025V KA
C723
1025V KA
C703
1025V KA
C704
1025V KA
R711
47K
R709
47K
R710
47K
R738
3.9K
R739
1.2K
R714
3.9K
R713
3.9K
R712
4.7K
R716
2.2K
R715
22K
R701
47K
R704
4.7K
R708
1K
R702
47K
R707
1K
R705
3.9K
R721
3.9K
R720
3.9K
R719
47K 1/4W
R718
47K 1/4W
R742
470
R740
680
R741
470
R706
3.9K
R703
47K
1/4W
W817
W821
CAUTION: DIGITAL TRANSISTOR
L701
22uH 0305
L702
22uH 0305
L703
22uH 0305
Q704
KTC3875S_Y_RTK
AUDIO MUTE
Q703
KTC3875S_Y_RTK
AUDIO MUTE
Q702
DTA143EKA
MUTE SW
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
NOTE:THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
CAUTION: DIGITAL TRANSISTOR
DURING PLAYBACK.
MEASURED WITH THE DIGITAL TESTER
NOTE:THE DC VOLTAGE EACH PART WAS
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
GND
FRONT_AUDIO_IN-L
AT+9V
DVD_AUDIO_L
H-26H-25
NC
0.1
NC
NC
0.8
0
0
NC
FROM/TO REGULATOR
00
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
NC
0
NC
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
53
54
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.CALCSW
D.C
A GND
ALCSW
SEL
OUT
ALCMUTE
NC
NC
NC
NC
NC
NC
NC
NC
NC NC NC NC NCNC
FROM/TO SYSCON/SERVO/TIMER
FROM/TO DISPLAY
5.1
5.1
0
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
3.03.03.03.00.35.12.53.0
0000
0000000
0
2.9
0
0
0
0
(VCR PCB)
Hi-Fi SCHEMATIC DIAGRAM
63
62
PCB010
DME042
FROM/TO 21PIN IN/OUT
FROM/TO AV IN/OUT 2
FROM/TO Y/C/AUDIO/HEAD.AMP SECAM