Schematic Diagram - Amp Section (Hx3/Hx7) - Sony CMT-HX3 Service Manual

6-19. SCHEMATIC DIAGRAM – AMP Section (HX3/HX7) –
A+5V
AGND
R-IN
AGND
L-IN
D+3.3V
INIT
NSPMUTE
DGND
SCLATCH
SCSHIFT
SCDT
(Page
/SD
34)
DGND
/RST
SOFTMUTE
PGMUTE
OVF
/OTW
CN700
19P
C751 C701
2.2 2.2
50V 50V
D701
MMDL914T1
R730
D702
MMDL914T1
C730
C748
10 50V
C749
R701 100
R751 C743
100 0.01
EP703
C831
0.1
(CHASSIS)
C832
0.01
HCD-HX3/HX5/HX7
• See page 41 for Waveforms. • See page 46 for IC Block Diagrams.
L701
10µH
C731
100
10V
C804 0.001
INIT
NSPMUTE
SCLATCH
SCSHIFT
SCDT
/SD
/RST
SOFTMUTE
PGMUTE
OVF
/OTW
R745
100
A/D CONVERTER
IC701
PCM1803DBR
R746
100
C733
0.1
100
0.1 C732 0.1
R729 1k
C738 10 50V
0.1
C742
0.01
C734 C741 C735
L702 0.001 0.1 10
10µH 50V
+3.3V REGULATOR C739
0.01
IC702
NJM2871BF33
C736
0.01
VOUT
NOISE
GND
VIN
CONT
R722
47k
L703
10µH
R731
470
C757
10
R733
50V
470
CLOCK SHIFT
IC703
MC74VHC74DTR2
C744
0.1
C737
0.0047
R780
22
DIGITAL POWER AMP
IC707
CXD9845AM
GVDD GVDD
_B _A
R712 100
BST
/OTW
_A
R711 100
R713 PVDD
/SD
100 _A
A
OUT
PWM_A
_A
R706 100
/RST
GND
_AB
B
PWM_B GND
R714 R759 OC_
OUT_B
100 15k ADJ
PVDD
GND
_B
C760
GND BST_B
0.1
VREG BST_C
C740
220 PVDD
GND
10V _C
R756 R755
M2 OUT_C
100 100
R752
M1 GND
100
C
PWM_C GND
R754 /RST
OUT_D
100 _CD
D
PWM
PVDD_D
_D
VDD BST_D
GVDD GVDD
_C _D
R757
3.3
C790
C758
100
0.1
16V
R742 C745
10k 0.01
OVF
C747
100
10V
C746
0.01
R741
100
R743
100
INIT C806 0.1
R744 0
R747 470
R748
47k
R749 0
+1.8V REGULATOR
IC704
NJM2871BF18
C797
0.01
NOISE
VOUT
GND
CONT
VIN
C798
R750 C761
10
47k 0.01
50V
37 37
C714 R707 C719
C707
560p 12 1800 35V
47
35V
C702
C706 C764 0.1
0.1 0.1
R720
3.3
C712 R719
0.1 3.3
C713 0.047
Q702
2SA1235
C708 47 35V
C715 560p C765 0.1
R708 12
R765
C718 0.047
0
C763 0.047
Q701
C767 0.1
2SC3052
PROTECT DETECT
R792
0
R709 12 C709
C766 C710
47
0.1 47 35V
C716 560p 35V
R793 C794
47k 1
C768 0.047
C769
1800 L760
35V 10µH
C756 R770
0.1 3.3
C717 R710
560p 12
C791
0.1
R769
3.3
C762
0.1
L761
10µH
C788
0.1
C787
0.001
R790
100
C754
0.001
C752
0.1
C796
0.1
C704
0.001
C753
STREAM PROCESSOR
100
IC705 10V
CXD9788AR
L704
10µH
L705
C783
1µH
10p
CLOCK BUFFER
IC709
MC74VHC1GU04
VCC
C785 C784
C781 10p 0.001 NC
10 C799 C779 C780
50V 0.01 0.01 0.001
GND
R783 R782 X702
22 1M 49.152MHz
R781
100
HCD-HX3/HX5/HX7
L710 C722
10µH 0.0022
CN702
C720 R721 R739 C723 2P
P1
1 10k 10k 0.0022 C844
0.1
L+
R724
4.7
L-
R725 C845
4.7 0.1
(Page 40)
C728 R718 R740 C724
1 10k 10k 0.0022
L711
C725
10µH
0.0022
R726 R727 R728
Q702,703
220k 100k 220k
OVER LOAD DETECT
C726
2.2
Q703
2SA1235
Q752,753
OVER LOAD DETECT
C778 R776
2.2 220k
R777
100k
Q752 R778
2SA1235 220k
Q753
2SA1235
C772
0.0022
C770 R771 R772 C773
1 10k 10k 0.0022 CN703
2P
R774 C846
Q1
4.7 0.1
R+
R-
R775
4.7
C847
C777 R768 C774 0.1
1 10k R773 0.0022
10k
(Page 40)
C775
0.0022
CN704
4P
+27V
GND R1
+27V
GND
(Page 45)
C711 CN705
220 2P
16V
+12V S1
GND
(Page 45)
EP702
(CHASSIS)
EP701
A
B
C
D
C786
0.001