Sony HCD-DX90 / MHC-DX90 Service Manual ▷ View online
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)
HCD-DX90
33
33
7-12. SCHEMATIC DIAGRAM – PANEL SECTION – • See page 21 for Wavefoms. • See page 43 for IC Block Diagrams.
MAIN BOARD (3/3)
CN401
0
0
0
0
0
0
7.0
R746
1k
MTZJ-T-77-5.6C
C617
0.001
0.001
220
270
180
7.2
7
0
22K
MIC
LEVEL
10k
100 10V
100 10V
: /1
180
REC PAUSE/START
REC PAUSE/START
V
v
JW
B
b
PLAY MODE
STERO/MONO
REPEAT
DOLBY NR
270k
270k
PHONES
1
7
EDIT
TUNER MEMORY
: /1
33 50V
33
1
7
(Page 29)
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD STOP
no mark : CD STOP
HCD-DX90
34
34
CN303
TAPE MECHANISM
DECK BLOCK (2/3)
(TCM-230PWR11)
TAPE MECHANISM
DECK BLOCK (3/3)
(TCM-230PWR11)
(ERASE HEAD)
(REC/PB HEAD)
CN304
S1001, 1002
S1003 – 1006,
S1008,1009
M
M901
(CAPSTAN)
TAPE MECHANISM
DECK BLOCK (1/3)
(TCM-230PWR11)
PM1001
PLUNGER
(DECK-A)
PM1002
PLUNGER
(DECK-B)
A
B
C
D
1
2
3
4
5
6
CN302
7-13. PRINTED WIRING BOARD – LEAF SW SECTION – • See page 21 for Circuit Boards Location. • See page 28 for Schematic Diagram of Head Board.
• Semiconductor
Location
Ref. No. Location
D1001
B-2
D1002
B-5
IC1001
B-1
IC1002
B-5
Q1001
B-2
(Page 26)
(Page 26)
(Page 26)
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