Sony HCD-DX90 / MHC-DX90 Service Manual ▷ View online
HCD-DX90
29
29
BD BOARD
CN101
DRIVER BOARD
CN701
POWER AMP BOARD
CN503
POWER AMP BOARD
CN502
TA7807S
M5F7809L
25V
10V
JR908
JR909
32
33
C212
1000P
1000P
3.3k
C824
4.7k
D824
1SS355
1SS355
R830
4.7k
4.7k
R901
100
100
25V
10V
MAIN BOARD (2/3)
MAIN BOARD (2/3)
MAIN BOARD (2/3)
MAIN BOARD (2/3)
MAIN BOARD (2/3)
PANEL BOARD
CN601
MAIN BOARD (1/3)
47k
Q891, 892
FAN DRIVE
M961
7-8. SCHEMATIC DIAGRAM – MAIN (3/3) SECTION –
(Page 28)
(Page 28)
(Page 37)
(Page 25)
(Page 27)
(Page 31)
(Page 31)
(Page 28)
(Page 33)
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD STOP
(
no mark : CD STOP
(
) : REC
<
> : TAPE PB
(Page 28)
(Page 28)
HCD-DX90
30
30
POWER AMP BOARD
E
B
C
4
3
2
1
L
TRANS BOARD
CN977
G
TRANS BOARD
CN978
1
2
3
1
1
2
3
4
E
E
(CHASSIS)
E
E
E
E
1-676-807-
11
(13)
E
E
13
1
13
1
1
7
B
MAIN BOARD
CN902
M
TRANS BOARD
CN977
C
MAIN BOARD
CN901
A
B
C
D
E
F
G
1
2
3
4
5
6
7
7-9. PRINTED WIRING BOARD – POWER AMP SECTION – • See page 21 for Circuit Boards Location.
• Semiconductor
Location
Ref. No. Location
D501
C-5
D502
A-5
D503
F-5
D504
F-5
D541
C-2
D543
E-2
D551
C-5
D581
E-5
D941
B-2
D979
B-2
IC501
E-7
Q501
B-5
Q503
F-2
Q504
F-1
Q505
G-5
Q506
G-5
Q551
B-6
Q581
F-5
Q831
G-5
Q941
B-2
(Page 38)
(Page 38)
(Page 38)
(Page 26)
(Page 26)
HCD-DX90
31
31
MAIN BOARD (3/3)
CN902
MAIN BOARD (3/3)
CN901
TRANS BOARD
CN978
TRANS BOARD
CN977
TRANS BOARD
CN977
470
470
RBV-602
NO505
VH
VH
GND
VL
VL
0.001
0.001
STK-412-040
STK-412-040
1.5k
MTZJ-T-77-15B
0.22
0.22
82k
82k
1.5k
MTZJ-T-77-15B
0.22
0.22
82k
Q831
2SC1785
OVER HEAT
DETECT
R531
220
R532
560k
R533
47k
2SB1375
1
2
4
3
1
2
4
3
CN504
2P
7-10. SCHEMATIC DIAGRAM – POWER AMP SECTION –
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
(Page 29)
(Page 29)
(Page 39)
(Page 39)
(Page 39)
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD STOP
no mark : CD STOP
HCD-DX90
32
32
(CURSOR)
(CURSOR)
Z
OPEN/CLOSE
E
E
DISC 3
D632, S645
DISC 2
D631, S644
DISC 1
D630, S643
E
E
E
E
1
9
DISC SKIP/
EX-CHANGE
1-676-190-
21
(21)
PANEL BOARD
CD SW BOARD
EDIT
TUNER MEMORY
PLAY MODE
STREO/MONO
REPEAT
DOLBY NR
30
29
1
2
FL601
FLUORESCENT INDICATOR TUBE
A
MAIN BOARD
CN401
E
E
E
TIMER
SURROUND
SURROUND
MD (VIDEO)
TUNER/BAND
TAPE A/B
MIC LEVEL
GROOVE
GROOVE
DISPLAY
I/1
I/1
SPECTRUM
EQ EDIT
LOOP
V-GROOVE
MIC
CD
VOLUME
ENTER
PHONES
m
M
g G
>
+
– .
DIRECTION
3
1
ROTARY ENCODER
7
4
1
6
2
5
3
9
1
10
18
D615
(FUNCTION)
X
x
b
B
V
v
E
E
REC PAUSE/
START
CD SYNC
HI-DUB
D617, S616
E
D614, S613
1-676-189-
21
(21)
7
4
6
1
5
2
3
4
1
5
8
E
E
E
E
E
E
E
E
E
E
E
E
E
3
1
1
9
A
B
C
D
E
F
G
H
I
1
2
3
4
5
6
7
8
9
10
7-11. PRINTED WIRING BOARD – PANEL SECTION – • See page 21 for Circuit Boards Location.
• Semiconductor
Location
Ref. No. Location
D601
C-10
D602
D-3
D603
E-3
D611
D-9
D612
G-9
D613
F-9
D614
H-9
D615
F-6
D617
I-5
D618
D-3
D630
A-8
D631
A-7
D632
A-6
IC601
D-6
IC602
G-4
IC603
C-9
IC722
H-9
Q604
E-10
Q605
C-3
Q606
E-9
Q607
E-9
Q608
D-9
Q609
D-9
Q610
D-9
Q611
D-9
Q612
D-9
Q613
D-8
Q614
D-8
Q615
E-3
Q621
C-9
Q622
F-9
Q623
H-8
Q624
F-7
Q625
H-5
Q626
D-3
Q630
A-8
Q631
A-8
Q632
A-5
Q633
A-9
Q634
A-9
Q635
A-4
Q721
H-8
(Page 26)
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