Sony HCD-EC68W / MHC-EC68W Service Manual ▷ View online
HCD-EC68W
HCD-EC68W
25
25
7-2. SCHEMATIC DIAGRAM - CD Board -
• See page 23 for Waveforms. • See page 34 for IC Block Diagrams. • See page 35 for IC Pin Function Description.
IC B/D
M
MAIN
BOARD
(2/2)
CN608
2
1
IC B/D
R108
R154
R153
C201
R304
R201
R110
R303
R203
R204
R205
R206
R207
R208
R209
R210
R219
R223
R222
R221
R218
R112
R202
R211
Q301
R301
C202
R157
TP121 (RFI)
TP124 (VC)
R156
CN301
R10
1
C401
R415
R102
R128
R129
R143
R142
R139
R114
R140
R15
1
R220
R150
R212
IC101
R105
R106
R125
R126
R127
IC201
X102
C301
C307
C309
C100
C138
C153
C151
C204
C130
C128
C113
C127
C126
C103
C102
C120
C118
C117
C101
C124
C125
R145
R146
R147
R148
R149
C149
C105
C143
C146
C145
C148
C104
C405
C404
C403
C205
C116
C133
CN201
C110
R113
R111
C115
R155
C109
C132
R104
C123
C122
C139
C150
R136 R135
R134
C112
C108
R120
R118
C136
C107
R130
R144
C144
C147
C140
C137
C141
C142
C106
R302
C306
C303
C302
R405
R402
R408
R414
C207
C152
C206
IC401
0
1M
1M
100
10V
2.2
0
10k
2.2
100
100
100
100
100
100
100
100
100k
100k
100k
100k
100k
100
0
100
2SA2119K
100k
100
10V
10V
100
100
16P
220
220
10V
47k
10k
470k
1k
47k
22k
47k
10k
0
0
100k
0
TK63115SCL-G@GT
0.1
1
0.001
0.1
470p
0.1
470p
0.1
0.1
0.0022
0.1
0.1
0.1
0.01
0.01
0.022
C119
0.022
0.022
0.1
0.0047
0.0047
0
0
0
0
0
22p
0.1
0.01
470p
0.01
47p
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
10k
100
22
6.3V
47
0.1
0.1
0
470p
470p
0.01
0.001
22k
470k
1M
0.1
0.1
47p
0.1
4.7k
22k
0.1
0.1
0.01
0.01
0.0022
0.1
100
10V
0
100
10V
10V
10
10
10k
2.2k
2.2k
4.7k
1
470p
1
BA5826SFP-E2
SP-
SP+
SL+
SL-
100
1M
1k
0
0
0
16.9344MHz
TC94A70FG-006
5p
5p
21P
0
100k
IC101
CD-MP3 PROCESSOR
IC401
FOCUS/TRACKING COIL DRIVE,
SLED/SPINDLE MOTOR DRIVE
IC201
+1.5V REGULATOR
SP-
SP+
SL+
SL-
M401
(SPINDLE)
M402
(SLED)
AUTOMATIC POWER
CONTROL
S201
(LIMIT)
(BX5BT/CBX1)
OPTICAL
PICK-UP
BLOCK
(KSM-213DCP)
M
M
(Page 29)
HCD-EC68W
HCD-EC68W
26
26
7-3. PRINTED WIRING BOARD - DECK Board -
7-4. SCHEMATIC DIAGRAM - DECK Board -
• See page 23 for Waveforms
E
B
E
B
1
8
Q501
Q502
L501
BIAS OSC
CN501
C501
C502
C513
C514
C515
C516
C540
C542
JW501
JW502
JW503
JW504
JW505
JW506
JW507
JW508
JW509
JW510
ET501
1 4
5
8
1
4
5 8
9
1
R501
R502
R503
R504
R505
R506
R507
R508
R509
R510
R511
R512
R513
R514
R515 R516
R517
R518
R519
R520
R521
R522
R523
R524
R525
R526
R527
R528
R529
R530
R531
R532
R533
R534
R535
R536
R537
R538
R539
C503
C504
R540
C505
R541
6
4
3
1
C506
R543
R544
R545
C509
R546
C510
C511
C512
C517
C519
C520
C521
C522
C523
C524
C525
C526
C527
C528
C529
C530
C531
C532
C533
C534
C535
C536
C537
C538
C539
C543
C545
C546
JR501
JR502
JR503
DECK BOARD
IC501
IC502
K
MAIN
BOARD
CN606
-2
-1
S501
S501
(REC/PB)
PB REC
TAPE
MECHANISM
DECK
1-875-501-
11
(11)
A
B
C
D
1
2
3
4
(CHASSIS)
(2/2)
BOARD
K
MAIN
CN606
11
7.4
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
7.4
0.3 (5.2)
0 (0.2)
0.3 (5.2)
0.3 (5.2)
0.3 (5.2)
6
2
1
3
5
4
L501
BIAS OSC
S501
(REC/PB)
0
R515
100k
R511
100k
R513
150
R509
1000p
C517
47p
C509
220p
C51
1
0
R516
100k
R512
150
R510
100k
R514
220p
C512
47p
C510
47p
C525
47p
C526
2SC1740S-RT
Q501
2SC1740S-RT
Q502
2200p
C537
2200p
C536
2200p
C535
1
2
3
4
5
6
7
8
8P
CN501
9V
M-GND
SW
EH
VREF
Lch
COM
Rch
E
ET501
R540
47
R541
47
C539
1
R539
4.7
R537
10k
R538
10k
C538
0.01
R536
4.7k
R535
4.7k
R534
15k
R507 330k
R503
2.2k
C505
0.01
C503
2200p
C504
2200p
R504
2.2k
C506
0.01
R508
330k
2.2k
R501
2.2k
R502
16V
100
C502
16V
100
C501
R517
1k
R518
1k
C519
470p
C520
470p
C521
1
C522
1
R520
47k
R519
47k
R521
47k
R522
47k
C532
0.01
C531
0.01
R526
330k
R528
330k
R525
330k
R527
330k
R530
2.2k
R529
2.2k
R531
8.2k
R532
8.2k
C534
2200p
C533
2200p
50V
1
C513
50V
1
C514
TP501
TP502
TP504
TP503
TP505
TP506
TP508
TP509
TP507
C540
4700
16V
47
C516
16V
47
C515
1000p
C543
25V
22
C542
100
R543
100
R544
0.1
C545
0.1
C546
C527
470p
C528
470p
C530
330p
C529
330p
R523
3.3k
R524
3.3k
R505
15k
R506
15k
470
R545
470
R546
8
7
6
5
4
3
2
1
NJM4558V
-TE2
IC502
GND
VCC
8
7
6
5
4
3
2
1
NJM4558V
-TE2
IC501
GND
VCC
0.1
C524
0.1
C523
R533
22k
-
+
+
-
+
-
+
-
PB AMP
IC501
IC502
REC AMP
(CHASSIS)
DECK BOARD
REC-Rch
REC-Lch
I-TP-STATE
9V
1
A-GND
9
M-GND
PB-Rch
9V
PB-Lch
Q501,502
OSC
TAPE
MECHANISM
DECK
PB
REC
-1
-2
7
D
B
6
9
F
5
3
G
1
C
E
H
8
4
A
2
(Page 27)
(Page
29)
•
: Uses unleaded solder.
• See page 23 for Circuit Boards Location.
HCD-EC68W
HCD-EC68W
27
27
IC602
IC801
1
3
4
5
1
2
1
8
1
2
8
9
1
2
8
9
2
1
26
27
20
21
1
2
B
E
E
5
1
13
1
3
B
E
TB602
JW760
JW761
JW762
JW763
JW764
JW765
JW766
JW767
JW768
JW769
JW770
JW771
JW773
JW774
JW775
JW777
JW780
JW781
CN601
JW782
JW783
CN603
JW784
CN604
JW785
CN605
JW786
CN606
JW787
CN607
CN608
CN801
R638
C602
C601
R641
R642
C802
CN633
C613
C614
R658
X801
C620
C621
C622
C623
R662
C626
C627
C628
C822
C823
C630
C631
C632
C636
R674
R675
C833
C641
RY602
C644
C646
JW601
JW602
JW603
JW604
JW605
JW606
JW607
JW608
JW609
JW801
C661
JW802
JW803
C663
JW610
JW804
C664
JW611
C665
JW612
JW613
C667
D607
D608
JW615
C669
D609
JW616
JW617
JW618
JW619
D610
C671
JW620
JW621
ET601
C675
D615
ET602
JW622
C676
JW623
JW624
JW625
D619
JW626
JW627
JW628
JW629
D620
JW630
JW631
JW632
JW633
JW634
D629
JW635
JW636
JW637
JW638
JW639
D630
T801
JW640
JW641
JW647
JW649
JW650
JW651
JW653
JW654
JW655
JW657
JW658
JW659
JW660
JW661
JW663
JW664
JW665
JW666
JW667
JW668
JW669
JW670
JW673
JW674
JW675
JW676
JW677
JW678
JW679
JW680
JW681
JW683
JW684
JW685
JW686
R717
R718
JW689
R719
JW690
R724
R725
R726
JW697
JW699
C714
JW700
JW701
JW702
JW703
JW704
JW705
Q601
JW706
JW708
JW709
JW710
JW711
JW712
JW713
JW715
JW716
JW717
JW718
JW719
L603
L604
JW720
JW721
JW722
JW723
JW724
L801
JW725
CF801
L802
JW726
L803
L804
JW728
Q624
L805
JW729
JW730
JW731
JW732
JW733
JW734
JW735
JW736
JW737
JW738
FL801
JW739
FL803
JW740
JW741
JW742
JW743
JW744
JW750
JW751 JW752
36
18
1
19
B E
B E
B E
B E
B E
B
E
B
E
B
E
B E
B E
B E
B E
B E
B E
B E
1
14
15
28
R601
R603
R604
R605
R609
R801
R802
R803
R804
R610
R805
R611
R806
R612
R807
R613
R808
R614
R809
R615
R616
R617
R618
R619
R810
R811
R812
R813
R814
R620
R815
R621
R816
R622
R817
R623
R818
R624
R819
R625
R626
R627
R628
R629
R820
R821
R822
R823
R824
R630
R825
R826
R827
R829
R637
D791
R639
R830
R831
R832
R640
R836
R837
R643
C607
R838
R644
C608
R839
R645
C609
R646
R647
R648
R649
C803
R840
C804
C610
C805
R841
C611
R842
C806
C612
C807
R843
R844
C808
R650
R845
C809
R651
R846
R652
R847
C617
C618
C619
C810
C811
C814
C815
C816
C817
R660
C819
R663
C629
R666
R667
C820
C821
R669
C824
C826
C827
C633
C828
R670
C634
C829
C635
R672
R673
C637
C638
C639
R676
R677
C830
R678
C831
R679
C832
C834
C640
C835
C836
C642
C837
C643
C838
R680
R681
C645
R682
R683
C647
R684
C648
R685
C649
R686
R687
C840
C841
R689
C843
C844
C650
C845
C651
C846
C652
C847
C653
C848
R690
C654
R691
C655
R692
C656
R693
C657
R694
C658
R695
R696
R697
C850
D601
C662
D602
D604
D605
C666
D606
JR601
JR602
JR603
JR604
JR605
D801
JR606
D802
JR607
D803
JR608
D804
JR609
D805
D806
C674
D614
D617
JR610
D618
JR611
C679
JR612
JR613
JR614
JR615
JR616
JR617
JR618
C680
C681
D621
C682
D622
C683
C684
C685
C686
C687
D628
C689
C690
D631
C691
C692
C693
C694
C695
C696
C699
R700
R704
R706
R707
R708
R709
R715
R716
R720
R722
R727
R728
R731
R732
C700
C703
C704
R749
C713
R750
R751
R752
R753
R754
TP619
R787
R788
R791
R792
Q602
Q603
Q604
Q605
Q606
Q608
Q801
Q802
TP657
Q611
Q612
Q616
Q617
Q618
Q619
Q622
C788
C789
TP690
D
J
REG
BOARD
W610
PT
BOARD
CN051
LOW AMP
BOARD
CN104
(CHASSIS)
G
(CHASSIS)
ANTENNA
FM/AM
M601
(FAN)
M
L
R
SPEAKER
IMPEDANCE
USE 6
Ω
1-875-488-
14
(14)
C
JACK
BOARD
H
LOW AMP
BOARD
CN102
K
DECK
BOARD
L
PANEL
BOARD
CN304
M
CD BOARD
CN201
1
3
A
B
C
D
E
F
G
H
I
1
2
3
4
5
6
7
8
9
RY602
MAIN BOARD
7-5. PRINTED WIRING BOARD - MAIN Board -
•
: Uses unleaded solder.
• See page 23 for Circuit Boards Location.
(Page 32)
(Page 32)
(Page 32)
(Page 32)
(Page 24)
(Page 30)
(Page 26)
(Page 32)
Ref. No. Location
• Semiconductor
Location
D601
E-2
D602
E-6
D604
G-3
D605
D-5
D606
E-6
D607
G-5
D608
F-5
D609
G-5
D610
F-5
D614
B-6
D615
D-7
D617
D-6
D618
E-6
D619
E-6
D620
E-7
D621
D-5
D622
D-5
D628
D-7
D629
H-6
D630
H-6
D631
E-7
D791
E-5
D801
B-3
D802
A-4
D803
B-4
D804
B-3
D805
B-2
D806
A-2
IC602
B-7
IC801
C-4
Q601
D-4
Q602
D-5
Q603
D-5
Q604
G-3
Q605
D-6
Q606
D-5
Q608
B-6
Q611
D-5
Q612
D-6
Q616
B-9
Q617
B-9
Q618
D-7
Q619
G-6
Q622
E-6
Q624
E-7
Q801
B-5
Q802
B-5
HCD-EC68W
HCD-EC68W
28
28
7-6. SCHEMATIC DIAGRAM - MAIN Board (1/2) -
BOARD
CN102
LOW
H
AMP
AMP
G
LOW
CN104
BOARD
BOARD
PT
J
CN051
MAIN
(2/2)
BOARD
1
BOARD
REG
W610
D
C
JACK
BOARD
0
8.8
0.4
16.6
16.7
16.7
0
0.8
0.7
8.9
8.8
0
0
8.8
10.8
2.9
2.3
0
8.8
8.8
0
0
4.2
4.7
0
0.4
0.7
1
2
3
4
5
6
7
8
8P
CN604
RELAY ON/OFF
V STBY
AC DETECT
VH(AC)
VL(AC)
GND
VL(AC)
VH(AC)
100V
C621
0.1
100V
C623
0.1
1N5402-F46
D607
1N5402-F46
D608
1N5402-F46
D610
1N5402-F46
D609
25V
2200
C627
25V
1000
C628
MC2838-T112-1
D602
2SC3052F-T1-LF
Q606
2SC3052F-T1-LF
Q605
2SC3052F-T1-LF
Q604
R646
100
R652
100
R614
10k
R613
10k
R648
47k
R649
2.2k
L603
L604
10
R615
10
R612
10
R611
10
R647
0.1
C607
0.1
C617
0.1
C608
0.1
C618
MC2838-T112-1
D601
4.7k
R610
4.7k
R609
1
2
3
3P
CN601
VDD+
GND
VDD+
2SC3052F-T1-LF
Q602
2SC3052F-T1-LF
Q603
1N4002B
D615
2SC3052F-T1-LF
Q619
0.022
C642
56k
R686
10k
R677
10k
R676
16V
100
C631
2SC3052F-T1-LF
Q608
R667
47k
10V
47
C630
1k
R666
25V
47
C601
10V
100
C620
10k
R691
TP601
TP602
TP615
TP617
TP618
TP619
TP621
TP622
TP623
TP624
TP625
TP626
TP627
TP628
TP629
TP630
TP631
TP632
TP633
TP634
TP635
R622
33k
R617
10k
R623
10k
R624
10k
R618
10k
R625
33k
R616
3.9k
R619
3.9k
15
R724
R725
15
KTA1266GR-AT
Q601
50V
4.7
C632
2.2k
R690
27k
R689
R630
47k
50V
4.7
C614
50V
10
C613
R626
10k
4.7k
R627
15
R726
JW750
1k
R644
R620
4.7k
R621
4.7k
C611
0.22
C612
0.22
100k
R639
100k
R640
MC2838-T112-1
D617
R629
4.7k
R601
470
R650
4.7k
R651
4.7k
R727
4.7k
R728
4.7k
47k
R678
1
C695
1
C696
47
R674
47
R675
C699
1000p
C700
1000p
MAZ8082GMLS0
D622
MAZ8043GMLS0
D621
2SC3052F-T1-LF
Q611
100k
R669
10k
R670
10k
R628
4.7k
R637
0.01
C619
4700p
C629
10k
R672
50V
3.3
C641
ISA1235AC1TP-1EF
Q612
ISA1235AC1TP-1EF
Q618
1
2
3
4
5
5P
CN633
PA-GND
OUT-R
+VH
-VH
OUT-L
1
2
3
4
5
6
7
8
9
CN605
9P
AUDIO-L
A-GND
AUDIO-R
HP-GND
HP-L
HP-R
AMP-ON
SP-RELAY
GND
1
2
3
4
5
5P
CN603
R603
4.7
1k
R693
4.7k
R692
R673
0
10k
R643
2.2k
R645
50V
C622
2200
50V
2200
C626
2W
470
R658
2W
470
R662
D604
MA2J1110GLS0
MA2J1110GLS0
D614
MA2J1110GLS0
D605
MA2J1110GLS0
D628
E
ET601
JW751
JW752
MC2836
D606
100k
R604
25V
22
C602
E
ET602
RY602
1k
R663
10V
47
C714
1N4002B
D629
1N4002B
D630
C609
4700p
C610
4700p
68
R638
68
R641
68
R642
R605
27
22k
R687
4.7k
R685
MA2J1110GLS0
D631
100k
R791
220k
R792
MA2J1110GLS0
D791
O-POWER
HP-L
HP-R
AMP-R
AMP-L
SP-RELAY
AMP-ON
AUDIO-L
HP-R
HP-L
O-POWER
PROTECT
PROTECT
AMP-ON
I-P-MONI
PROTECT
CD-AVR
AUDIO-R
VSTBY
1
3
2
MAIN BOARD (1/2)
(CHASSIS)
(CHASSIS)
1
OUT
GND
3
IN
+
-
-
+
R
L
TB602
(FAN)
M
M601
PROTECT
DETECT
Q601, 602
FAN MOTOR DRIVE
DC DETECT
PROTECT
DETECT
Q611, 612
RELAY DRIVE
Q605, 606
PROTECT DETECT
RELAY DRIVE
DC DETECT
USE 6
Ω
IMPEDANCE
SPEAKER
7
11
D
B
16
6
9
17
10
F
5
15
3
G
1
18
12
C
E
H
8
J
4
13
A
14
2
I
IN-R
A-GND
IN-L
AMP-ON
PROTECT
(Page
33)
(Page
33)
(Page
33)
(Page 33)
(Page 29)
(Page
33)
Click on the first or last page to see other HCD-EC68W / MHC-EC68W service manuals if exist.