Sony HCD-EC50DC / MHC-EC50DC Service Manual ▷ View online
37
37
HCD-EC50DC
HCD-EC50DC
7-14. PRINTED WIRING BOARD — PANEL BOARD —
•
See page 23 for Circuit Boards Location.
:Uses unleaded solder.
IC703
IC701
36
1
1
3
E
E
(LIQUID CRYSTAL DISPLAY)
(STANDBY)
STANDBY
(BACK-LIGHT)
?/1
JR705
C727
R776
C720
R672
R668
R667
R666
R665
Q672
R786
Q671
Q670
R684
R698
R747
C708
R769
R780
R664
R653
Q704
R652
R728
R669
R759
R662
R670
R701
R754
C702
R710
R651
R730
R714
R661
R681
Q707
R663
R756
R724
C739
R733
R770
R738
R778
R792
R772
R712
R753
R735
R717
R758
R771
R739
R704
R705
R774
C743
D702
C712
R708
R707
R703
R673
R706
C731
R723
C716
R760
R761
R763
R757
R764
R762
R765
R709
C719
C722
R716
R773
C707
R779
R721
R719
R718
R711
R785
C705
C728
C711
L701
R713
L702
C701
C729
R731
C730
R715
C737
R702
Q706
Q702
Q705
Q703
R722
D701
R768
C738
R750
R686
D703
C672
R749
C710
R784
R777
C724
R688
Q665
R767
Q669
Q701
C736
Q668
Q667
Q667
R742
Q666
R744
R671
R675
R678
R674
R676
R677
R697
R696
R726
R679
R695
R751
R694
JR701
C733
R685
R683
R689
R682
R657
C706
JR702
R755
Q664
Q663
Q661
C732
R691
R692
C734
R693
C709
R748
R746
R687
R743
R775
JR704
Q711
R727
R745
R736
R732
R766
C714
C717
C713
Q710
C741
C718
C715
C723
C735
C742
R725
JR703
R734
R788
R787
C725
C726
D704
R791
R793
R794
W701
JW775
JW737
JW712
JW611
JW744
JW783
JW765
JW728
LED701
JW745
JW750
JW773
JW786
JW779
JW769
JW763
JW727
JW607
JW726
JW748
JW820
JW787
JW766
JW715
JW729
JW702
JW730
LCD702
JW710
JW709
X702
X701
JW700
JW708
JW711
JW776
JW705
JW704
JW612
JW743
JW742
JW741
JW740
JW703
JW739
JW738
JW736
JW735
JW720
JW791
SW700
C704
JW724
C703
JW734
JW732
JW733
JW746
JW747
JW731
JW764
JW701
C671
JW782
JW777
JW774
JW714
JW768
JW723
JW800
JW707
JW716
JW713
JW725
JW781
JW722
JW761
JW760
JW780
JW757
JW759
JW758
JW706
Q662
CNS671
JW788
JW721
JW749
JW756
JW753
JW790
JW751
JW785
JW767
JW755
JW796
JW752
JW772
JW795
JW762
JW784
JW794
JW600
JW603
JW601
JW789
JW604
JW608
JW719
JW610
JW602
SW705
SW714
SW713
SW701
SW712
SW715
SW716
SW711
SW721
SW706
SW704
SW703
SW702
SW708
SW720
SW709
SW710
JW770
JW606
JW605
JW799
JW798
JW771
JW793
SW719
JW717
JW797
JW819
CNS701
JW792
LED702
JW609
JW718
JW778
JW754
K
A
E
E
E
E
E
E
E
E
E
E
E
E
PANEL BOARD
FUNCTION
VOLUME
DISC 1
DISC 2
DISC 3
DISPLAY
TUNER/
BAND
CD
u
x
M
M
+
DSGX
EQ
PLAY MODE/
TUNING MODE
DISC SKIP/
EX-CHANGE
Z
CD MECHANISM
DECK
B
MAIN
BOARD
CNS111
(Page 29)
E
E
E
E
E
E
E
K
K
A
1
2
A
B
C
D
E
F
G
H
I
3
4
5
6
7
8
9
• Semiconductor
Location
Ref. No.
Location
D701
C-4
D702
C-4
D703
H-6
D704
B-4
IC701
C-5
IC703
B-7
LED701
B-3
LED702
C-8
Q661
H-6
Q662
H-6
Q663
H-6
Q664
H-6
Q665
H-3
Q666
H-3
Q667
H-4
Q668
H-4
Q669
H-3
Q670
G-3
Q671
H-4
Q672
G-4
Q701
C-4
Q702
C-3
Q703
C-3
Q704
B-4
Q705
C-3
Q706
C-3
Q707
B-3
Q710
C-8
Q711
C-8
38
38
HCD-EC50DC
HCD-EC50DC
31
7
6
CNS
R739
R719
R718
R681
R683
R662
R652
R661
R651
R754
R687
R685
R689
R678
R667
R695
R696
R698
R693
R691
R692
R665
R666
R670
R669
Q661
R722 R713
R682
R657
R684
R688
R653
R664
R663
R675
R674
R673
R677
R679
R672
R676
R768
R738
R703
R704
R705
R706
R710
R742
R743
R744
R745
R746
R747
R750
R753
R756
R762
R765
R773
R774
R775
R777
R780
R766
R769
R760
R761
R763
R764
JW700
R721
R751
R759
R786
R784
R779
R709
R724
R778
R776
R771
R717
R758
R707
R735
R716
R708
R749
R715
R772
R686
D703
R788
LCD702
R792
LED701
R767
R725
R702
R701
CNS701
C701
Q702
Q703
R787
Q706
C702
L702
L701
C724
C707
Q710
CNS671
C725
C726
Q664
Q663
C671
C723
C728
C729
C730
C739
C738
C737
C735
C715
C714
C709
C708
R755
LED702
C719
C741
C722
JR704
R734
R732
R712
C713
C717
C718
R714
C731
Q701
D701
D702
C705
Q707
IC703
R757
C716
X702
R723
C704
R730
X701
C732
C706
C733
R731
R785
Q704
C711
R711
C703
D704
Q705
R726
R728
R791
C720
C672
Q662
Q665
R668
R671
Q668
Q666
Q667
Q669
Q671
R694
R697
Q672
Q670
SW700
C712
Q711
C743
R748
C734
C736
C742
C710
SW702
SW703
SW704
SW706
SW709
SW710
SW719
SW701
SW721
SW705
SW720
SW708
SW712
SW713
SW714
SW715
SW716
SW711
R770
R733
R793
IC701
R794
R727
R736
10k
1k
1k
22k
47k
47k
47k
47k
47k
10k
4.7k
22k
10k
470
47k
47k
470
47k
47k
47k
470
47k
470
470
47k
RT1N441C
220k
10k
220k
470k
2.2
2.2
47k
47k
47k
22k
22k
22k
22k
22k
22k
22k
10k
10k
4.7k
1k
1k
1k
4.7k
1k
1k
2.2k
2.2k
2.2k
2.2k
1k
100
1k
10k
4.7k
10k
22k
47k
470
47k
22k
4.7k
100k
47k
22k
22k
470
100k
100
10
100k
100
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
1k
470
4.7k
1PS226
0
SDT-***-
22k
1L0341Y23E0CA602
(BACK-LIGHT)
10k
100
100
2.2k
29P
0.1
2SC3052F-T1-LF
2SC3052F-T1-LF
47
2SC3052F-T1-LF
0.1
47p
0.001
2SA1235TP-1EF
13P
0.1
0.1
2SA1235TP-1EF
2SC3052-T1-LF
22
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.001
0.22
47p
0
SPR-39MVW
0.1
0.22
0.0047
0
4.7k
1k
4.7k
47p
0.001
0.001
10k
0.1
2SA1235F-TP-T1-L
UDZW-TE17-3.6B
MC2836
0.01
2SC3052F-T1-LF
RPM7240-H18
100k
0.1
4.19MHz
2.2k
470
10V
4.7k
32768Hz
22p
0.1
22p
4.7k
10k
RT1N441C
-TP-1
0.1
22k
100
16V
16V
1SS355WTE-17
2SC3052F
-T1-LF
100k
10k
470
0.1
0.1
KTA1273-Y-AT
2SA1365-T112-1
470
47k
2SC3440-T12-1F
2SC3440-T12-1F
2SA1365-T112-1
2SA1365-T112-1EF
2SA1365-T112-1EF
470
470
2SC3440-T12-1F
2SC3440-T12-1F
0.1
2SA1235TP-1EF
220p
47k
0.001
0.001
220p
0.22
47k
47k
470
MB90802PF-G-118E
22k
0
0
7-15. SCHEMATIC DIAGRAM — PANEL BOARD —
•
See page 23 for Waveforms.
•
See page 42 for IC Pin Function Description.
39
39
HCD-EC50DC
HCD-EC50DC
K
K
A
A
A
A
POWER TRANSFORMER
(MAIN)
*
* NOT REPLACEABLE
BULT IN TRANSFORMER
BULT IN TRANSFORMER
120V
1-869-480-
(12)
220V
230-240V
VOLTAGE
SELECTOR
POWER TRANSFORMER
(SUB)
AC IN
(CHASSIS)
H
MAIN
BOARD
CNP151
(Page 29)
12
WH151
C054
C055
R051
R052
D051
C052
C053
D052
L001
T001
PT001
RY002
C051
T002
S001
PT002
1
A
B
C
D
E
F
G
2
3
4
5
6
7
8
H
(Page 30)
(1/3)
T002
AC IN
T001
R052
R051
W052
RY002
C051
C053
*
*
NOT REPLACEABLE
BULT IN TRANSFORMER
PT001
PT002
C052
D051
D052
C055
C054
S001
VOLTAGE
SELECTOR
120V
220V
230-240V
L001
WH151
1P TERMINAL
1P TERMINAL
4.7k
4.7k
WIRE-EARTH
GND
0.1
0.1
50V
0.1
MC2836
MC2838
0.47
0.47
8P
7-16. PRINTED WIRING BOARD — PT BOARD —
7-17. SCHEMATIC DIAGRAM — PT BOARD —
•
See page 23 for Circuit Boards Location.
:Uses unleaded solder.
40
40
HCD-EC50DC
HCD-EC50DC
IC801 LV23003VA
– MAIN Board –
1
AM RF-IN
3
FM-MIX
2
REG
6
VCC1
4
GND1
AM
RF
AM
MIX
AM
DET
AM
IF
FM
DET
FM
IF
SD
FF
VCO
FF
FF
ST
TRIG
STSW
FM
MIX
FM
OSC
AM
OSC
OSC
BUFFER
FM
S-METER
DECODER
PHASE
COMPARATOR
MUTE
PROGRAMMABLE
DIVIDER
REFERENCE
DIVIDER
UNLOCK
DETECTOR
SWALLOW
COUNTER
POWER ON
RESET
DATA SHIFT
REGISTER
LATCH
PHASE
DETECTOE
CHARGE
PUMP
UNIVERSAL
COUNTER
5
AM-MIX
7
AMIF-IN
8
FMIF-IN
9
P-DET
10
P-COMP
11
FM-DET
12
L-OUT
13
R-OUT
14
VSS
FM
RF
36 FM RF-IN
35 GND2
34 FMRF-OUT
33 VCC2
30 BO2
29 BO1
29 BO1
32 FM-OSC
31 AM-OSC
28 A-OUT
27 A-IN
27 A-IN
23 FM DET-OUT
15
CE
16
DI
17
CL
18
DO
22 MPX-IN
19 XIN
20 XOUT
21 VDD
26 PD
25 AGC
25 AGC
24 AM DET-OUT
LOW-PASS
FILTER
AGC
IF
BUFFER
PIROT
DET
CCB
I/F
•
IC Block Diagrams
IC401 BD3881FV
– MAIN Board –
28
REC1O
27
REC1N
26
REC2N
25
REC2O
24
INC2
23
INC1
22
INB2
21
INB1
20
INA2
19
INA1
18
OUT1
17
BAS1
16
OUT2
15
BAS2
BASS
BASS
13
CONT
14
VEE
12
VDD
11
TRE2
10
TRE1
TREBLE
TREBLE
7
VOLIN1
8
VOLIN2
9
GND
VOLUME
VOLUME
6
PB1O
LOGIC
CONTROL
5
PB2O
4
PB2N
1
PB1N
2
PB1P
3
PB2P
IC201 LA4600
1
2
3
4
5
6
7
8
9
10
RNf1
R f1
R f2
RNf2
Standby switching
CH1 input
amplifier
CH2 input
amplifier
REF
amplifier
Predrive
amplifier
Predrive
amplifier
TSD protector
Output
amplifier
Output
amplifier
OUT-1
P-GND
OUT-2
VCC
FILTER
P-P
STBY
IN-2
S-GND
IN-1
Pop noise prevention block
Ripple filter
– P-AMP-L Board –
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