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

17
17
HCD-EP404
AMP Section
• Signal Path
• R-ch is omitted due to same as L-ch.
: FM
: CD
: PB(TAPE)
: REC(TAPE)
IC401
FUNCTION SELECT SWITCH,
ELECTRONIC VOLUME
Q403,404
MUTING
Q401
MEGA BASS
R-CH
R-CH
R-CH
LTCOM
LTOUT
LVRIN
LVROUT
L3
CD L-IN
CD L-IN
CD R-IN
CD-DA
CD-CLK
CDRS
TUNER
L-CH
TL-CH
TR-CH
R-CH
R-CH
R-CH
L4
L2
DI
CE
21
17
INPINENA
MUTE
1
10
9
11
15
16
2
2
5
7
10
3
4
L1 12
73
DATAOUT
15
CDRESET
88
CDCLK
14
CDDATA
D402
D403
D401
+
+
–
+
–
SPEAKER
IMPEDANCE
USE 8
Ω
L
R
PHONES
JK501
IC301 (2/3)
SYSTEM CONTROLLER
CL
14
74
CLK
19
SOUNDENA
CD BLOCK
DI
CL
IC601
POWER AMP
IC302
EEPROM
X2
X1
X301
4.194304MHz
79
80
EEPROMDA
TA
75
CD DOOR SW
91
SDA
5
SCL
EEPROMCLK
77
6
Z
  PUSH
OPEN/CLOSE
A
D
TUNER
SECTION
TAPE
SECTION
C
TAPE
SECTION
B
TUNER
SECTION
RR-CH
RL-CH
R-CH
STK601
18
18
HCD-EP404
DISPLAY/POWER Section
X302
REMOTE CONTROL
RECEIVER
IC603
+12V
REGULATOR
IC602
+9V
REGULATOR
IC304
RESET SIGNAL
GENERATOR
IC301 (3/3)
SYSTEM CONTROLLER,
LIQUID CRYSTAL DISPLAY DRIVER
Q205, 206
POWER ON/OFF
RELAY DRIVE
T201
POWER
TRANSFORMER
(MAIN)
AC IN
T202
POWER
TRANSFORMER
(SUB)
RE201
B+ AMP
POWER AMP (IC601)
D601
D107
CD-EN
D604
RESET 84
POWERFAIL 86
92
TU-EN 94
3
1
3
1
D901 – 903
(LCD BACK LIGHT)
85
1
REMOTEIN
ROTARY
ENCODER
ENCODERA
97
ENCODERB
98
LCD34
62
LCD35
63
LCD36
64
LCD33
61
LCD32
60
100, 1 – 4
COM0 – COM3
KEY1 – KEY5
23 – 26
LCD04 – LCD31
32 – 59
SW301 – 317
X303
VOLUME
LIQUID CRYSTAL
DISPLAY
D205 - 208
RECT
D215 - 218
RECT
D212, 213
RECT
D201 - 204
RECT
Q604
+9V
REGULATOR
Q603
+5V
REGULATOR
Z202
+6.2V
REGULATOR
Z201
+6.8V
REGULATOR
CD9V
9V
TAPE DECK SECTION
M12V
CAPSTAN/REEL MOTOR B+
SYSTEM CONTROLLER (IC301) VDD,
EEPROM (IC302)
SYSTEM CONTROLLER (IC301) AVREF
Q605,606
REGULATOR
CONTROL SWITCH
FM/AM PLL (IC102)
3
1
RDSDATA
7
POWER 22
Q306
RESET
SWITCH
D303
D302
SWITCHING
Q301
SWITCHING
Q104
B+ SWITCH
REC-LED
18
Q305
LED
DRIVE
D313
TIME
13
Q304
LED
DRIVE
D312
z
TIMER
D603
D309
D310
D602
STA_B+
TAPE
SECTION
E
19
19
HCD-EP404
6-3. Printed Wiring Board  MAIN Section
• See page 15 for Circuit Boards Location.
IC602
IC603
IC601
IC401
IC101
IC102
IC702
IC701
K
K
K
K
K
K
K
K
K
K
K
A
A
A
A
A
A
A
K
K
A
A
A
A
A
A
E
E
E
E
K
K
K
K
K
A
A
A
A
K
A
K
A
E
E
E
E
E
E
E
E
E
E
A
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
MAIN BOARD    
HEADPHONE
  BOARD    
R706
R722
POW
-FA
PHOTO
MODE
PHONES
SPEAKER
(IMPEDANCE USE 8    )
L
R
TO
POWER
BOARD
CN505
(Page 25)
A
TO
DISPLAY
BOARD
(Page 23)
B
TO
DISPLAY
BOARD
(Page 23)
C
FM
ANT
FM
LEAD ANTENNA
(MODE)
(HALF)
(PROTECT(FWD))
(CAPSTAN/REEL)
(TRIGGER PLUNGER)
TAPE PLAY
DETECT SENSOR
M
 CD
BLOCK
SUPPLIED AS THE
ASSEMBLED BLOCK
TO
DISPLAY
BOARD
(Page 23)
D
TO
DISPLAY
BOARD
(Page 23)
E
(R-CH)
(ERASE)
(L-CH)
(RECORD/PLAYBACK HEAD)
(ERASE HEAD)
L104
AM FERRITE-ROD
ANTENNA
1
3
BEAT CUT
1SS
2SS
1SS
2SS
TP
(AM VT)
TP
(FM VT)
1
2
A
B
C
D
E
F
3
4
5
6
7
8
9
Ref. No.
Location
D101
B-4
D102
B-4
D103
B-4
D104
B-4
D105
B-4
D107
C-7
D401
D-4
D402
D-4
D403
D-4
D404
E-6
D405
D-7
D601
E-6
D604
F-5
D701
B-8
D702
B-8
D703
C-8
D704
B-8
D706
F-7
IC101
C-5
IC102
C-6
IC401
D-5
IC601
E-4
IC602
F-5
IC603
F-5
IC701
A-7
IC702
B-7
Q101
C-5
Q102
C-4
Q103
C-4
Q104
B-6
Q401
D-4
Q402
D-4
Q403
E-5
Q404
E-5
Q603
E-5
Q604
F-6
Q605
E-6
Q606
E-6
Q701
B-7
Q702
B-8
Q703
B-7
Q704
B-8
Q705
B-7
Q706
B-8
Q707
C-7
Q708
C-8
Q711
D-7
Q712
C-8
Q713
C-7
Q714
C-7
Q715
B-8
Q716
B-8
Q717
B-8
Q718
C-8
Q719
C-7
Q720
F-8
Q721
E-7
Q722
F-7
Q723
F-7
Q724
A-8
ZD601
F-6
ZD602
E-5
• Semiconductor
Location
20
20
HCD-EP404
6-4. Schematic Diagram  MAIN Section (1/3)
• See page 15 for Waveforms.
• See page 27,28 for IC Block Diagrams.
2.4
<0.9>
1.3
1.3
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.3
0
0
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.6
3.3
0
0
3.3
3.6
0 <0.1>
0
1.8 <0.1>
3.7 <0.1>
0.9 <0.4>
0.9 <0.4>
2.1 <9>
1.8 <0>
5 <6>
5 
<5.6>
0 <0.4>
2.6 <3.3>
5 <5.7>
1.3
4.8 <5.7>
1.3
5 <5.7>
5 <5.8>
1.1 <0.8>
1.3
1.3
1.2
3.3
7.2
4.8
0
0
  
4.2 <0>
4.3
<3.4>
4.2
<5.2>
0
<0.6>
4.2
<0>
5
<0.1>
2.7
5.4
2
0.1
<0.6>
1
<0>
5 <5.8>
0
<0.2>
0 <4.8>
  
5.4
  
4.8
  
0
  
0
1.9 <0>
1
8.5
3.8
<0>
4.4
<0.4>
0
0.6
0.6
2.4
0
0
2.4
0
0.022
4.7k
3.3k
0.022
AM FERRITE-ROD
ANTENNA
L104, TC102
AM TRACKING
FM
LEAD ANTENNA
FM
ANT
BPF
1SS133T
1SS133T
0.001
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.047
3.9k
1SS133T
0.0056
0.022
0.0047
0.033
8.2k
6.8k
6.8k
2.2k
2.2k
0.22
0.22
10k
10k
2SC945
2SC945
0.0047
0.022
8.2k
3.9K
0.047
0.0056
0.1
0.1
0.1
0.1
0.001
0.001
0.001
0.001
0.01
0.01
0.0015
0.0015
0.022
2SC945
0.01
2SC1923
2SC945
0.047
100p
0.001
0.001
0.01
0.1
0.1
2SC3623
1SS133T
8.2k
8.2k
330
DTC343TS
DTC343TS
0.1
0.047
MAIN BOARD
(1/3)
TP
(AM VT)
TP
(FM VT)
CD
BLOCK
SUPPLIED AS
THE ASSEMBLED BLOCK
Q403,404
MUTING
BAND
SWITCH
TO
DISPLAY
BOARD
B
(Page 24)
TO
DISPLAY
BOARD
E
(Page 24)
MAIN
BOARD
(2/3) (3/3)
4
IC102
FM/AM PLL
B+ SWITCH
FM OSC
BUFFER
AMP
IC101
IC B/D
AM/FM IF AMP
MIX,MPX,DET,OSC
MEGA
BASS
MEGA
BASS
IC401
FUNCTION SELECT SWITCH,
ELECTRONIC VOLUME
L103
FM FREQUENCY
COVERAGE
T101
AM FREQUENCY
COVERAGE
L102, TC101
FM TRACKING
IC B/D
IC B/D
MAIN
BOARD
(2/3)
5
MAIN
BOARD
(3/3)
7
MAIN
BOARD
(2/3)
MAIN
BOARD
(2/3)
2
1
1
2
A
B
C
D
E
F
G
H
I
3
4
5
6
7
8
9
10
11
12
13
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