Sony CMT-EP30 / CMT-EP40 / HCD-EP30 / HCD-EP40 Service Manual ▷ View online
HCD-EP30/EP40
17
17
IC B/D
POWER
BOARD
CN402
E
CASSETE
BOARD
B
MAIN BOARD
(1/2)
1
DISPLAY
BOARD
D
DISPLAY
BOARD
C
9P
9P
5.3
4.8
7.8
0
0
3.6
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.6
0
0
3.9
0.1
1.9
1.4
2.1
1.9
2.1
1.4
5.6
6.2
13.5
9.9
9.3
13.7
0
MEGA BASS
ON : 0.1
OFF : 0.7
ON : 0.1
OFF : 0.7
0
MEGA BASS
ON : 0.1
OFF : 0.7
ON : 0.1
OFF : 0.7
0.8 (9.5)
13.7
0.8
(10)
0.6 (13.6)
13.7
13.6
(12.9)
13.6
(0)
0
(0.7)
0.6
(0)
(0)
13.7
13.7
13
0.3
0.7
0
0 [0.6]
0
0 [0.6]
0
[0.6]
0 [1.1]
0
16.4
0.6
0.6
0
16.1
8.7
8.7
16.1
16.7
8.7
CN201
9P
3.9k
3.9k
50V
+
+
1 50V
Q201, 202
REC AMP
+
+
+
4700p
+
0.1
0.1
0.1
0.0082
0.0039
0.0033
0.047
8.2k
0.027
0.1
0.1
0.1
0.0082
0.0039
5.6k
8.2k
0.027
0.047
0.0033
+
4.7
50V
+
50V
6.8k
0.001
8.2k
4.7
50V
+
+
50V
+
+
50V
50V
4.7
50V
6.8k
8.2k
0.001
4.7k
4.7k
2.2k
3.3k
2.2k
3.3k
50V
+
IC203
FUNCTION SELECT SWITCH,
ELECTRICAL VOLUME
MTZJ-6.2B
Q312
+6V REGULATOR
+
0.022
50V
+
+
10V
MTZJ-10B
Q313
+9V REGULATOR
+
0.022
+
MTZJ-10B
4.7k
Q310, 311
REGULATOR CONTROL
SWITCH
Q305, 306
B+ SWITCH
0.022
+
50V
+
DC_15V
0.1
+
+
50V
Q301, 302
MUTING
Q308, 309
+9V REGULATOR
0.001
+
16V
+
16V
+
50V
0.001
50V
+
Q314
MUTING CONTROL
SWITCH
IC301
POWER AMP
+
25V
+
+
0.15
0.15
+
+
25V
PHONES
CN301
5P
+
–
+
–
R
L
SPEAKER
IMPEDANCE
USE 4
Ω
+
–
–
+
–
BIAS CIRCUIT,
HEAT OPERATION
PROTECTION CIRCUIT
MAIN BOARD
(2/2)
CN202
4P
M201
(CAPSTAN/REEL)
S201
(PLAY)
0.1
AM FREQ STEP
10 kHz
R
9 kHz
+
Q205, 206
MEGA BASS
ON DRIVE
1N4148TP
1N4148TP
1N4148TP
1N4148TP
1N4148TP
1N4148TP
1N4148TP
U
1
u
U
2
u
U
3
u
U
4
u
BEAT
RL
RR
GND
PL
PR
9V
SYNC
COTR
0.047
2200p
16V
16V
16V
5.6k
2SD1616-L
+
2SD1616-L
2SD1616-L
1N4148TP
1N4148TP
1N4148TP
1N4148TP
2.7k
2.7k
2200p
9P
*CD
BLOCK
*SUPPLIED AS THE
ASSEMBLED BLOCK
CDDATA
CDCLK
CDRS
DAT
CLK
CE
DBBS
BEAT
SYNC
9K/10K
MUTE
PSW
GND
LED V+
TU –SW
TA –SW
CD –SW
6V
6
1
1
2
3
4
5
6
2
3
4
5
6
7
5
1
HEADPHONE BOARD
3.3k
3.3k
6-3.
SCHEMATIC DIAGRAM – MAIN (2/2)/HEADPHONE Boards –
•
See page 24 for IC Block Diagram.
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : TUNER (FM/AM)
(
no mark : TUNER (FM/AM)
(
) : CD PLAY
[
] : TAPE PLAY
(Page 19)
(Page 16)
(Page 21)
(Page 21)
(Page
22)
HCD-EP30/EP40
18
18
MAIN BOARD
L110
AM FERRITE-ROD
ANTENNA
AK
A
KA
T102
AM
OSC
L103
FM RF
+
1
2
3
B
C
C
E
E
C
C
B
E
C
B
E
C
B
+
+
+
+
+
+
+
+
+
A
K
+
+
+
+
+
KA
TP10
(FM VT)
TP11
(AM VT)
B
C
C
E
E
C
C
B
E
C
C
B
E
C
C
B
16
9
1
8
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
FM LEAD
ANTENNA
FM ANT
75
Ω
COAXIAL
ANT101
EC
B
EC
B
E C B
EC
B
BC
E
BC
E
EC
B
EC
B
B C E
BC
E
BC
E
EC
B
EC
B
B C E
EC
B
B C E
FM FREQ
STEP
*
CD
BLOCK
*
SUPPLIED AS THE
ASSEMBLED BLOCK
SW301
SPEAKER
(IMPEDANCE USE 4
Ω
)
SPK301
9 kHz
r
10kHz
+
–
+
–
L
R
A
K
K
A
K
K
K
A
A
K
A
A
K
K
K
K
K
K
A
A
A
A
K
A
A
A
A
K
IC101
IC102
IC604
IC203
IC301
A
K A
K
U04
FM OSC
(EP40)
(EP40)
(EP40)
1
6
E
POWER BOARD
CN402
S201
(PLAY)
M201
(CAPSTAN/REEL)
M
2
1
3
4
C
B
DISPLAY
BOARD
CASSETTE
BOARD
A
DISPLAY
BOARD
D
DISPLAY
BOARD
R413
HEADPHONE BOARD
R412
JK401
PHONES
3
4
5
6
1
2
7
1
5
A
B
C
D
E
F
G
H
I
1
2
3
4
5
6
7
8
9
10
6-4.
PRINTED WIRING BOARDS – MAIN/HEADPHONE Boards –
•
See page 15 for Circuit Boards Location.
• Semiconductor
Location
Ref. No.
Location
D101
B-4
D102
B-5
D103
B-8
D104
C-9
D105
B-5
D302
G-6
D303
G-6
D306
F-6
D307
H-8
D308
G-7
D310
H-8
D311
H-8
D312
F-6
D314
F-7
D316
F-6
D317
H-8
IC101
B-9
IC102
D-8
IC203
D-5
IC301
G-5
IC604
E-8
Q101
D-9
Q102
C-10
Q103
B-10
Q104
A-10
Q109
C-8
Q116
D-10
Q201
D-4
Q202
E-4
Q205
F-4
Q206
D-4
Q209
E-8
Q210
E-9
Q301
F-5
Q302
F-6
Q305
H-6
Q306
G-7
Q308
H-7
Q309
H-7
Q310
G-8
Q311
G-7
Q312
G-7
Q313
H-7
Q314
G-6
Q605
G-7
ZD103
E-9
ZD302
H-7
ZD304
H-6
ZD305
G-7
(Page 20)
(Page 20)
(Page 19)
(Page 20)
(Page 23)
HCD-EP30/EP40
19
19
6-5.
PRINTED WIRING BOARD – CASSETTE Board –
•
See page 15 for Circuit Boards Location.
6-6.
SCHEMATIC DIAGRAM – CASSETTE Board –
•
See page 23 for Waveforms.
•
See page 24 for IC Block Diagram.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : TAPE PLAY
(
no mark : TAPE PLAY
(
) : RECORD (ISS 1)
[
] : RECORD (ISS 2)
IC701
+
A
K
+
+
+
+
+
+
+
+
+
+
+
BC
E
EC
B
EC
B
BC
E
EC
B
E C B
+
A
K
HPRE701
REC/PB/ERASE
HEAD
–1
–2
–3
–4
–5
–6
SW701
(REC/PB)
REC
PB
CASSETTE BOARD
B
MAIN BOARD
CN201
A
B
C
1
2
3
4
5
• Semiconductor
Location
Ref. No.
Location
D701
B-4
D702
B-4
IC701
B-3
Q701
A-4
Q702
B-4
Q703
B-4
Q704
A-2
Q705
B-2
Q706
C-2
1
2
3
3
MAIN
BOARD
(2/2)
CN201
B
IC B/D
0
1.2
1.4
3.9
0
0
7.8
7.7
0
3.9
1.4
1.2
0
0 (0.7)
0
0 (0.7)
0
0
(3.5)
(3.5)
0.7 (0)
0.7
0
9.3 (0.8)
9.3 (0.8)
8.9 (0.3)
0.4 (0)
[21.4]
[21.4]
0 (0.7)[0]
R-CH
L-CH
ERASE
HRPE701
RECORDE/PLAYBACK
ERASE
CN701
4P
0.0015
0.0018
SW701 (4/6)
(REC/PB)
REC
R
PB
SW701 (2/6)
(REC/PB)
REC
r
PB
SW701 (3/6)
(REC/PB)
REC t PB
Q705
ISS SWITCHING
0.0027
0.022
0.022
+
50V
0.022
0.0068
Q706
REC BIAS OSC
SW701 (6/6)
(REC/PB)
REC T PB
MUTING
CONTROL
SWITCH
Q704
REC ON SWITCH
25V
+
1SS133T
-77
+
+
50V
5.6k
1.2k
0.1
SW701 (1/6)
(REC/PB)
REC
R
PB
0.1
50V
+
+
0.022
50V
+
+
0.1
50V
+
+
0.1
5.6k
1.2k
IN1
NF1
PC1
OUT1
GND
IN2
NF2
PC2
OUT2
VCC
ALC
IN1
ALC
CONST
ALC
IN2
RF
SW701 (5/6)
(REC/PB)
REC
r
PB
50V
+
IC701
ALC, REC/PB AMP
Q701, 702
MUTING
50V
50V
+
+
CASSETE BOARD
0.0018
0.0018
330
2SD1616-L
50V
100k
1N4148TP
4.7k
(Page 18)
(Page 17)
HCD-EP30/EP40
20
20
DISPLAY BOARD
1
36
13
+
MEGA BASS
MUSIC MENU
SW614
SW631
(MONO STEREO)
ST t MONO
ISS
+
–
VOLUME
2 t 1
Z
PUSH
OPEN/CLOSE
SW600
A
A
A
A
K
K
A
TUNER
TAPE
REPEAT
SW613
K
K
K
K
A
K
A
K
A
K
A
+
SW622
SW621
EC
B
US, CND,
E, AUS
K
K
A
A
A
A
K
US, CND,
E, AUS
AEP, UK,
E, AUS
US, CND,
E, AUS
US,
CND
+
–
TUNING
M >
m .
+
–
x
PRESET
SHUFFLE
TUNER DSPL
SW608
(EP40)
u
RDS
SW610
(EP40)
TUNER MEM
ENTER PGM
+
REMAIN
CD
B C E
K
K
A
A
K
A
K
K
K
A
SW601 – 615
MAIN BOARD
CN101
+
+
A
E C B
E C B
I/1
1
3
TIMER
D619
20
1
80
40
41
21
61
60
IC601
D621
LIQUID CRYSTAL DISPLAY
IC603
REM601
(INCLUDED IN DISPLAY BOARD)
D11 – 19
(LCD BACK LIGHT)
D19
D18
R421
R420
D17
D16
D15
D14
D12
D13
D11
R419
1
2
9
8
1
16
IC602
C
MAIN BOARD
CN302
D
MAIN BOARD
CN204
A
2
1
A
B
C
D
E
F
1
2
3
4
5
6
7
(AEP, UK)
6-7.
PRINTED WIRING BOARD – DISPLAY Board –
•
See page 15 for Circuit Boards Location.
• Semiconductor
Location
Ref. No.
Location
D11
F-4
D12
F-4
D13
F-4
D14
F-4
D15
F-3
D16
F-3
D17
F-3
D18
F-2
D19
F-2
D601
C-6
D602
D-5
D603
C-6
D604
C-3
D607
B-3
D608
B-3
D609
D-2
D610
D-2
D611
D-2
D612
C-3
D613
D-3
D614
D-3
D615
D-3
D616
D-6
D617
E-2
D618
D-4
D619
B-6
D647
C-6
D648
D-6
IC601
B-4
IC602
D-2
IC603
A-3
Q601
B-6
Q602
B-6
Q603
D-3
Q604
C-6
REM601
B-6
(Page 18)
(Page 18)
(Page 18)
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