Schematic Diagram - Main Section (1/3) - Sony HCD-EC68P Service Manual

6-6.

SCHEMATIC DIAGRAM - MAIN Section (1/3) -

1 2 3
MAIN BOARD (1/3)
A
CN601
3P
TP601
VDD+
M 1
M601 TP602
(FAN) GND
2
VDD+
3
B
∗R605
15 (EC78P: US, CND)
56 (EC68P/EC78P: UK)
C601
47
(EC78P) 25V
CN602
5P
IN-R
1
F
A-GND
2
C
IN-L
3
HI AMP
BOARD AMP-ON
4
CN152
PROTECT
5
(Page 34)
PA-GND
1
E
TP609
OUT-R 2
+VH 3
HI AMP
BOARD
D -VH 4
CN151 TP612
OUT-L
5
(Page 34)
CN632
5P
TB601
TP614
R
SPEAKER
HIGH FREQ.
IMPEDANCE
USE 8Ω
L TP613
E
C603
4700p
C606
4700p
CN603
(Page 35)
5P
TP615
IN-R 1
H
A-GND 2
TP617
IN-L 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
CN104 OUT-L 5
(Page 35)
G
CN633
5P
(EC78P)
TB602
SPEAKER
TP626
LOW FREQ.
IMPEDANCE
H R
USE 8Ω
L TP625
SPEAKER
IMPEDANCE
USE 6Ω
(EC68P)
I
ET601
C610 C609
(CHASSIS)
4700p 4700p
ET602
J
(CHASSIS)
HCD-EC68P/EC78P
4 5 6 7
Q601
KTA1266GR-AT R726 R725 R724
15 15
15
0.4 16.6 JW750
Q603
8.8 R626
R604 2SC3052F-T1-LF 10k
100k
0 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
C602 R601 C613 C614
10 4.7
22 470
50V 50V
25V
R634 R635 R636
56 56 56
RY601
R608 D603 R632
10 MA2J1110GLS0 100k
R633
100k
L602
C604 C615
R606 10
0.1 0.1
C605 C616
0.1 0.1
L601
R607 R631
10 10
C700
1000p
C699
1000p
R638 R642
R641
68 68 68
D601
MC2838-T112-1
D604
MA2J1110GLS0
RY602
R610 R609
R612 4.7k 4.7k
R640
10 100k
R639
100k
L604
C607 C617
0.1 0.1
R611 10
C608 C618
L603 0.1 0.1
R728
R648 47k R651 4.7k 4.7k
R650 R727
4.7k 4.7k
R615 C620 C619
10 100 0.01
10V
8 9 10 11
PROTECT
R672
10k
JW751 JW752
D614
MA2J1110GLS0
10.8
Q608
2.9 O-POWER
2SC3052F-T1-LF
R667
STANDBY
R614 R613 D606
SWITCH 47k
10k 10k MC2836
2.3
R666
1k
C630
47
10V
AMP-R D602
MC2838-T112-1
AMP-L
Q605
2SC3052F-T1-LF
R652 R646 8.8
100 100
0
Q605, 606
PROTECT DETECT
C695
1
C631
R677
100
10k
16V
AMP-R
R673
AMP-L R676
10k
D615
1N4002B
R658
470 2W
HP-R
R662
470 2W
HP-L
PROTECT
Q612 C629
ISA1235AC1TP-1EF 4700p
AMP-ON
R669
8.9
100k
8.8
R637
4.7k
D605 0
MA2J1110GLS0
C714
47
R644 R663
10V
1k 1k
R670
10k
Q611, 612
PROTECT
DETECT
R645
2.2k
0.8 8.8
0.7 0
R643 R628 R675 R674
10k 10k 47 47
Q604 Q611
2SC3052F-T1-LF 2SC3052F-T1-LF
RELAY DRIVE
31 31
12 13 14
∗C622, 626
2200 50V (EC68P)
3300 50V (EC78P: UK)
3300 63V (EC78P: US, CND)
D609
1N5402-F46
Q606
R791
2SC3052F-T1-LF
100k
8.8
(EC78P)
D612 2A02M
D611 2A02M
0
D630 1N4002B
D629 1N4002B
(EC68P)
C696
C628
1 1000
25V
C627
2200
C632
25V R729 R689
4.7
100k 27k
50V
R690
D628
2.2k
MA2J1110GLS0
0
4.2
Q618 0
ISA1235AC1TP-1EF
DC DETECT
4.7
R678
47k
2SC3052F-T1-LF
RELAY DRIVE
R685
4.7k
R687
22k
D631
MA2J1110GLS0
HCD-EC68P/EC78P
15 16 17 18
∗
R616, 619
3.9k (EC68P)
R619
∗
10k (EC78P: UK)
15k (EC78P: US, CND)
R625
33k
CN604
8P
TP627
RELAY ON/OFF
1
TP628
V STBY
2
TP629
AC DETECT J
3
VH(AC)
4
VL(AC) PT
5
BOARD
6 GND
CN051
(Page
7 VL(AC)
C641
R691
3.3
41)
10k 8 VH(AC)
50V
R686
56k
R692
0.7 4.7k
C642
0.022
0.4
Q619
R693
1k
D617
MC2838-T112-1
3
MAIN
7
BOARD
6 (3/3)
(Page 33)
1
1 MAIN
2 BOARD
(2/3)
3 (Page 32)
IN 1
D REG
BOARD
GND
W610
(Page 38)
OUT 3
CN605
9P
AUDIO-L TP630
AUDIO-L
1
A-GND
2
AUDIO-R TP631
AUDIO-R
3
C
HP-GND
4
TP632
HP-L
HP-L
5
TP633 JACK
HP-R
HP-R BOARD
6
TP634
AMP-ON (Page
AMP-ON
7
TP635
SP-RELAY
38)
SP-RELAY
8
GND
9