DOWNLOAD Sony CMT-EP404 / HCD-EP404 Service Manual ↓ Size: 2.32 MB | Pages: 41 in PDF or view online for FREE

Model
CMT-EP404 HCD-EP404
Pages
41
Size
2.32 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cmt-ep404-hcd-ep404.pdf
Date
PREV: Sony DHC-FL3 / DHC-FL5D / DHC-FL7D / SS-CT7 / SS-FL7 / SS-FL7RC / SS-RS7 Service Manual

Sony CMT-EP404 / HCD-EP404 Service Manual ▷ View online

21
21
HCD-EP404
6-5. Schematic Diagram  MAIN Section (2/3)
0
0
0
0
7.6
0
[8.9]
0
[1.9]
0
[1.9]
0.6 [0]
0
[2.5]
0 [0.1]
0
[0.1]
0
[0.7]
0 [0.7]
0 [0.7]
0
0
1.3
1.4
3.6
0
7.2
7.3
0
0
0
3.6
1.4
1.3
0
0
0
0
0
0
0.6 [0]
0.6 [0]
0 [0.1]
8.4 [0.1]
8.9 [0]
0
[0.1]
0
[5.9]
0
0
[0.7]
0
[0.7]
0
[0.1]
8.9
[8.2]
0
[8.8]
0.7
9
0 [0.1]
0 [1.9]
0 [1.9]
0 [0.7]
0 [2.5]
2
4.2
4.7
7.8
4.2
4.7
7.8
0.7
1.3
3.7
0.7
1.3
3.9
11.8
11.8
11.8
11.9
0
0
0
11.8
11.9
0
No mark : FM
[       ] : REC
0.0012
2SC945
2SC945
2SC945
0.12
3.3k
0.0047
0.001
0.001
0.0012
0.001
0.01
0.012
2SC945
2SC945
2SC945
2SC945
2SC945
2SC945
2SC945
0.001
0.1
2SA733
0.1
0.0027
0.0027
0.022
2SC945
3.3k
3.3k
2SC945
2SC945
2SC945
220
100
16V
0.12
3.3k
MAIN BOARD
(2/3)
0.047
0.022
0.022
0.022
8.2k
10  50v
2SC945
2SC945
2SC945
8.2k
2.7k
0.1
0.1
5.6k
1SS133
2SC945
2SC945
0.1
0.1
2SB926
2SB926
0.022
(RECORD/PLAYBACK HEAD)
(ERASE)
(L-CH)
(R-CH)
M
TAPE PLAY
DETECT SENSOR
(HALF)
(CAPSTAN/REEL)
(MODE)
(TRIGGER PLUNGER)
(PROTECT(FWD))
IC701
IC B/D
REC/PB
SWITCH
REC/PB
SWITCH
REC/PB
SWITCH
IC702
ALC, 
REC,PB AMP
AMP GAIN
CONTROL
ALC
CONTROL
Q707, 708 
MUTING
REC/PB
SWITCH
Q702, 706
Q704
AMP GAIN
CONTROL
Q716, 717
REC BIAS
AMP
BAIS
OSC
ISS
SWITCHING
REC AMP
REC AMP
PB AMP
PB AMP
Q720,721
CAPSTAN/REEL
MOTER DRIVE
Q722,723
TRIGGER
PLUNGER DRIVE
TO
DISPLAY
BOARD
C
(Page 24)
TO
DISPLAY
BOARD
D
(Page 24)
MAIN
BOARD
(1/3)
1
MAIN
BOARD
(1/3)
5
IC B/D
MAIN
BOARD
(3/3)
MAIN
BOARD
(1/3)
MAIN
BOARD
(1/3) (3/3)
3
4
MAIN
BOARD
(3/3)
6
2
1
2
A
B
C
D
E
F
G
H
I
3
4
5
6
7
8
9
10
11
12
13
• See page 15 for Waveforms.
• See page 28 for IC Block Diagrams.
22
22
HCD-EP404
6-6. Schematic Diagram  MAIN Section (3/3)
0.7
1.1
0.7
13.7
13.5
5.6
12.1
6.2
0 <8.7>
14.2
0 <0.7>
9
14.2
11.9
14.2
No mark : FM
<      > : CD
0.1 
<9.3>
14.2 
<9.4>
14.1 
<8.6>
14.1
<0>
13.5
27.6
1.1
MAIN BOARD
(3/3)
0.001
0.001
0.1
0.01
1SS133
MTZJ-T-
72-9.1B
2SC3623
+5V REG
MTZJ-T-72-6.2B
2SA733
2SC945
1SS133
0.1
3.3k
3.3k
0.1
0.1
HEADPHONE BOARD
L
R
PHONES
IC603
+12V REG
IC602
+9V REG
IC601
POWER AMP
Q605, 606
REGULATOR
CONTROL
SWITCH
+9V REG
TO
POWER
BOARD
CN505
A
(Page 26)
SPEAKER
(IMPEDANCE 
USE 8   )
BEAT CUT
1SS
2SS
1SS
2SS
MAIN
BOARD
(2/3)
3
MAIN
BOARD
(1/3) (2/3)
4
MAIN
BOARD
(2/3)
6
MAIN
BOARD
(1/3)
7
0.01
0.01
1
2
A
B
C
D
E
F
G
H
3
4
5
6
7
8
9
10
11
23
23
HCD-EP404
6-7. Printed Wiring Board  PANEL Section
• See page 15 for Circuit Boards Location.
Ref. No.
Location
D302
A-3
D303
A-2
D305
A-1
D308
B-1
D309
C-5
D310
C-5
D312
A-5
D313
C-4
D316
C-2
D317
C-2
D901
B-6
D902
B-6
D903
B-6
IC301
B-3
IC302
C-2
IC304
C-2
Q301
D-2
Q304
B-5
Q305
C-5
Q306
C-2
X302
B-2
• Semiconductor
Location
IC301
X302
IC302
IC304
1
25
26
50
51
75
76
100
E
E
E
E
E
A
K
A
A
A
A
A
A
A
K
K
K
K
K
K
K
DISPLAY BOARD    
POWER-FAIL
CD-CLK
TO
MAIN
BOARD
(Page 19)
C
TO
MAIN
BOARD
CN704
(Page 19)
E
TO
MAIN
BOARD
CN705
(Page 19)
D
LED BOARD    
TO
MAIN
BOARD
CN402
(Page 19)
B
TIMER
DISPLAY
I /
PLAY
MODE
TUNER
MEM
ENTER
TAPE
CD
TUNER
PRESET
TUNNING +
TUNNING -
VOLUME
MUSIC
MENU
MEGA
BASS
(LIQUID CRYSTAL DISPLAY)
(LCD BACK LIGHT)
PUSH
OPEN/CLOSE
SW600
1
2
A
B
C
D
E
3
4
5
6
24
24
HCD-EP404
6-8. Schematic Diagram  PANEL Section
• See page 15 for Waveforms.
4.9
4.9
4.8
4.8
4.9
0
0<5>
4.8
0
4.8
0
0
0
4.8
4.8
2.4
2.4
0
0
5.4
5.4
0
4.8
4.7
0.2
2.4
4.3
No mark: FM
<     > : CD
2.4
4.8
4.8
3.2
1.6
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
4.8
4.9 <5.4>
4.8
2.6
2.3
4.8
4.8
5,4
5,4
0
0<4.8>
0
4.8<0>
0
4.8
0
4.9
5.4
2.3
<4.9>
5.4
4.9 <0>
4.9
4.9
3
4.9
4.9
0
4.8
0
5.7
4.8
4.8
4.8
6.2
5.3
5.4
5.7
DISPLAY BOARD
LED BOARD
MUSIC MENU
MEGA BASS
TUNING+
TUNING-
PRESET-
PRESET+
DISPLAY
TIMER
TUNER
TAPE
CD
TUNER MEM
ENTER
PLAY
MODE
SEL2215S
2SC536N
0
10V
50V
2SC536N
0
50V
PST529D
0.1
VOLUME
ENCODER
0.001
0.001
2SC536N
SWITCHING
SEL2215S
0.1
0.1
0.1
0.1
0.1
NC
NC
24/12
RDS
RDS
0.1
0.1
0.1
0.1
2SC536N
SEL2910D
SEL2910D
SEL2910D
(LIQUID CRYSTAL DISPLAY)
IC302
IC304
X302
REMOTE CONTROL
RECEIVER
RESET SIGNAL
GENELATOR
+5V REG
EEP ROM
LED DRIVE
LED
DRIVE
IC301
SYSTEM CONTROL
TO
MAIN BOARD
(1/3) CN402
B
(Page 20)
TO
MAIN BOARD
(1/3) CN704
E
(Page 20)
TO
MAIN BOARD
(2/3)
C
(Page 21)
TO
MAIN BOARD
(2/3)
CN705
D
(Page 21)
1
2
A
B
C
D
E
F
G
H
I
3
4
5
6
7
8
9
10
11
12
13
• See page 29 for IC Pin Function Description.
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