Schematic Diagram - Main Board (1/2) - Sony HCD-EC68 Service Manual

HCD-EC68/EC78
7-6.

SCHEMATIC DIAGRAM - MAIN Board (1/2) -

1 2 3 4
MAIN BOARD (1/2)
A
CN601
3P
TP601
M VDD+ 1
M601 TP602
(FAN) GND 2
R604
VDD+ 3 100k 0
B
∗R605
15 (EC78: AEP, RU)
56 (EC68/EC78: E2,
E3, E51, MX, AR)
C601
C602
47
22
25V
(EC78) 25V
CN602
5P
IN-R
1
F
A-GND 2
C
IN-L 3
HI AMP
BOARD
AMP-ON 4
CN152
PROTECT
5
(Page 30)
PA-GND
1
E TP609
OUT-R
2
+VH
3
HI AMP
D BOARD -VH
4
CN151 TP612
OUT-L
5
(Page 30)
CN632 RY601
5P
TB601
R608
TP614 10
R
SPEAKER
HIGH FREQ.
L602
IMPEDANCE
USE 8Ω
10
L TP613 R606
E
C603
4700p L601
C606
4700p
CN603
(Page 31)
5P
TP615
IN-R
1 C700
H
1000p
A-GND
2
TP617
C699
IN-L 1000p
3
LOW TP618
F
AMP AMP-ON
4
BOARD TP619
CN102 PROTECT 5
PA-GND 1
G
TP621
OUT-R
2
TP622
+VH
3
LOW TP623
AMP -VH
4
BOARD TP624
OUT-L
CN104 5
(Page 31)
G
CN633
5P
D601
MC2838-T112-1
R610 R609
R612
(EC78) 4.7k 4.7k
TB602 10
SPEAKER
TP626
LOW FREQ.
IMPEDANCE
L604
H R
USE 8Ω
R611 10
L TP625
SPEAKER
IMPEDANCE
L603
USE 6Ω
(EC68)
I
ET601
(CHASSIS) C610 C609
4700p
ET602 4700p
J
(CHASSIS)
HCD-EC68/EC78
5 6 7
Q601
R726 R725 R724
KTA1266GR-AT
15 15 15
0.4 16.6 JW750 JW751 JW752
8.8 Q603 R626
2SC3052F-T1-LF 10k
PROTECT 16.7 Q601, 602
DETECT FAN MOTOR DRIVE
R627
4.7k
Q602
2SC3052F-T1-LF
16.7
D621
MAZ8043GMLS0
0
R629
4.7k
0
C613 C614
R601
10 4.7
470
50V 50V
R634 R635 R636
56 56
56
D603
R632
MA2J1110GLS0
100k
R633
100k
C604 C615
0.1 0.1
C605 C616
0.1 0.1
R607 R631
10 10
R638 R641 R642
∗ ∗ ∗ ISA1235AC1TP-1EF
∗R638, 641, 642
D604
56 (EC78)
MA2J1110GLS0
RY602
68 (EC68)
R640
100k
R639 D605
100k MA2J1110GLS0
C617
C607
0.1 0.1
C618
C608
0.1 0.1
R728
R648 47k R651
4.7k 4.7k
R650 R727
4.7k 4.7k
R645
2.2k
0.8
0.7
R615 C620 C619 R643
10 100 10k
0.01
10V
Q604
2SC3052F-T1-LF
RELAY DRIVE
8 9 10 11
PROTECT
R672
10k
D614
MA2J1110GLS0
10.8
Q608 2.9 O-POWER
2SC3052F-T1-LF
DC DETECT R667
R614 R613 D606
47k
10k 10k MC2836
2.3
R666
1k
C630
47
10V
AMP-R D602
MC2838-T112-1
AMP-L
AMP-STBY
Q605 Q606
2SC3052F-T1-LF 2SC3052F-T1-LF
R652 R646
8.8 8.8
100 100
0
Q605, 606 0
PROTECT DETECT
C695 C696
1
1
C631 C632
R677
100
10k 4.7
16V
50V
AMP-R
R676 R673
AMP-L
10k 0
D615
1N4002B
R658
470 2W
HP-R
R662
470 2W
HP-L
PROTECT
Q612 C629
4700p
AMP-ON
R669
8.9
100k
8.8
R637
0 4.7k
C714
R644 47
R663
10V
1k 1k
R670
10k
Q611, 612
PROTECT
DETECT
8.8
0
R628 R675 R674
47 47
10k
Q611
2SC3052F-T1-LF
28 28
12 13 14 15
D609
1N5402-F46
R619
3.9k
R791
100k
R625
33k
(EC78)
D612 2A02M
D611 2A02M
D630 1N4002B
D629 1N4002B
(EC68)
C628
1000
25V
C627
2200
(EC78: AEP, RU)
C641
25V R691
R729 R689
3.3
10k
100k EC68/EC78: E2, 27k
50V
E3, E51, MX, AR
R690
D628
2.2k
MA2J1110GLS0
4.2
0.7
Q618
0
ISA1235AC1TP-1EF
DC DETECT C642
4.7 0.4 0.022
R678
47k
Q619
2SC3052F-T1-LF
R685 RELAY DRIVE
4.7k
D617
MC2838-T112-1
R687
22k
D631
MA2J1110GLS0
16 17 18
CN604
8P
TP627
1 RELAY ON/OFF
TP628
2 V STBY
TP629
AC DETECT
3 J
VH(AC)
4
VL(AC)
5 PT
BOARD
GND
6 CN051
(Page
VL(AC)
7
VH(AC) 36)
8
R686
56k
R692
4.7k
R693
1k
1
1
MAIN
BOARD
2
(2/2)
(Page 29)
3
IN 1 D
GND
OUT 3 REG
(Page 34)
BOARD
CN605
W610
9P
TP630
AUDIO-L
AUDIO-L
1
A-GND
2
TP631
AUDIO-R
AUDIO-R
3
C
4 HP-GND
HP-L TP632
5 HP-L
JACK
TP633
HP-R
BOARD
6 HP-R
AMP-ON TP634 (Page
7 AMP-ON
SP-RELAY TP635
34)
SP-RELAY
8
GND
9