DOWNLOAD Sony CMT-EP50 / HCD-EP50 Service Manual ↓ Size: 2.75 MB | Pages: 47 in PDF or view online for FREE

Model
CMT-EP50 HCD-EP50
Pages
47
Size
2.75 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cmt-ep50-hcd-ep50.pdf
Date
PREV: Sony HCD-CP300 Service Manual

Sony CMT-EP50 / HCD-EP50 Service Manual ▷ View online

HCD-EP50
21
21
IC B/D
IC B/D
IC B/D
5
2
3
4
MAIN BOARD
(1/3)
2
MAIN BOARD
(1/3)
5
DISPLAY
BOARD
D
MAIN BOARD
(1/3)
3
MAIN BOARD
(1/3)
1
MAIN BOARD
(3/3)
7
[0]
<3>
[0.7] <0.1>
[0.7]
<0.1>
[0.7]
<0>
[0.7]
<0.1>
[8.4]
<0.1>
[0]
<0.7>
[0]
[0]
<2.9>
[0]
<8.9>
[9] <0>
[8]
[0] <0.7>
[0]
<0.2>
[0] <–2.3> <<43.3>>
[0.6] <–1.6> <<–0.9>>
[0]
<6.6>
[0]
[0]
<3.5>
[0]
<3>
[0]
[0]
[0]
[0]
[0]
[0]
<2.9>
[0]
[0]
[0]
[0]
[0]
[0]
[0.7]
<0.1>
[0]
<3.6>
[9.1]
[0]
[0]
[9]
<8.3>
[0]
[0]
[0]
[1.3] [1.4] [3.8]
[0]
[7.7]
[0]
[0]
[0]
[1.3]
[1.4] [2.7]
[7.4] [7.4]
[0.7]
<0>
[0.7]
<0>
[4.3]
[3.8]
[8]
[4.6]
0
0.6
[0]
0
0.6
[0]
[4.1]
[2] [0] [2]
[0]
[7]
12.1
0
[12]
12
[11.3]
0
[12]
0
12
[0.1]
0
[5.6]
0
[12]
0
[12]
0
0
4.1
[0]
0
0
0
0
0
4.9
5.7
0
{0}
[5.7]
<5.7>
0
{0}
[0]
<5.7>
0
{5.7}
[0]
<0>
5.7
{0}
[0]
<0>
5.7
5.7
4.6
[0]
ERASE
L-CH
R-CH
HRPE101
RECORD/PLAYBACK/
ERASE
CN9
7P
SW R2
GND
SW P2
VCC
GND
CONT
SW P1
GND
SW R1
U12
REC/PB SWITCHING
REC/PB
SWITCH
U13
ALC,
REC/PB AMP
U13
AN7312
Q29
REC/PB SWITCH
BIAS OSC
Q31
BIAS OSC
ISS SWITCHING
REC AMP
REC AMP
TAPE TYPE
SELECT SWITCH
TAPE TYPE
SELECT SWITCH
Q32, 33
REC BIAS SWITCH
INVERTER
Q27
AMP GAIN CONTROL
Q35
REC/PB
SWITCH
MUTING
Q8
ALC
CONTROL
IN1
IN2
NF2
PC2
OUT2
ALC
IN2
RF
VCC
FM1
PC1
OUT1
ALC
IN1
ALC
CONST
GND
Q28
AMP GAIN CONTROL
REC/PB
SWITCH
Q26
MUTING
U14
BA335
U14
AMS
V. N
C. R
NF
NC
GND
TROUT
DIOUT
V8
VCC
Q37, 39
CAPSTAN/REEL
MOTOR DRIVE
Q38, 40
TRIGGER
PLUNGER DRIVE
Q14
BUFFER
U15
CAPSTAN/REEL MOTOR CONTROL,
TRIGGER PLUNGER CONTROL,
REC BIAS CONTROL
CN14
9P
CN15
9P
i
i
i
i
i
i
RR-CH
RL-CH
TR-CH
TL-CH
REC. LED+
BEAT
I
CLOCK
I
DA_IN
I
STR
I
CD-EN
I
TU-EN
I
TIMER
TAPE
MECHANISM
BLOCK
MAIN BOARD   
(2/3)
50V
0.0015
0.0015
50V
0.001
0.01
0.018
0.001
0.1
0.022
50V
50V
0.022
0.01
0.01
0.001
50V
0.068
0.0022
0.0047
50V
50V
50V
0.047
0.001
0.001
50V
0.0022
0.0047
0.068
50V
50V
0.047
50V
50V
0.022
50V
0.001
50V
50V
50V
50V
50V
0.022
0.022
0.1
1SS133T
1SS133T
1SS133T
1SS133T
1SS133T
1SS133T
2SD1616
6-8.
SCHEMATIC  DIAGRAM  – MAIN Board (2/3) –
•
 See page 28 for Waveforms.
•
 See page 28 for IC Block Diagrams.
(Page 20)
(Page 20)
(Page 25)
(Page 20)
(Page 22)
(Page 20)
HCD-EP50
22
22
MAIN BOARD
(1/3)
4
MAIN BOARD
(1/3)
6
MAIN BOARD
(2/3)
7
POWER
BOARD
CN601
E
DISPLAY
BOARD
F
5.7
9.1
0.5
{9.4}
0
{10.2}
0
{0.7}
8
14
{13}
14
{13}
0
0.7
1.1
0
1.1
0
0 
0.6
0.6
0.7
0
17.5
17.5
17.5
35.5
0
4
{10.2}
14 {0.1}
14
{13}
14
{13}
0.1
13.2
{13}
14
{13}
12.1
0.7
12.5
0.7
0
{10}
14
{9.8}
13.3
{12.5}
13.6
{13.1}
8.4
3.7
3.7
(EXCEPT AEP, UK, CH)
(AEP, UK, CH)
(AEP, UK, CH)
(AEP, UK, CH)
(EXCEPT AEP, UK, CH)
(AEP, UK, CH)
(EXCEPT AEP, UK, CH)
5
1
1
8
CN
5P
CN2
4P
8
5
4
6
7
9
1
2
3
PHONES
JK401
VCC
GND
VCC
GND
U9
HEADPHONE AMP
Q22
2SD1616
MUTING
Q21
2SD1616
MUTING
U11
POWER AMP
Q9, 12
+8V
REGULATOR
Q15
536N
REGULATOR
CONTROL SWITCH
Q19, 20
B+
SWITCH
Q47
+12
REGULATOR
U7
+12V
REGULATOR
U10
+9V
REGULATOR
U8
+5V
REGULATOR
AM FREQ
STEP
9kHz
r
10kHz
+
+
–
–
R
L
SPEAKER
(IMPEDANCE USE 8
Ω
)
CN17
O G
I
O G
I
O G
I
–1
–2
i
i
i
i
i
i
MAIN BOARD   
(3/3)
HEADPHONE BOARD  
16V
0.022
50V
0.1
220 
(AEP, UK, CH)
68 1W 
(EXCEPT AEP, UK, CH)
50V
50V
0.01
0.1
0.001
0.1
0.001
50V
50V
0.001
0.1
0.1
0.001
0.022
0.022
0.1
0.1
50V
50V
1SS133T
1SS133T
1SS133T
1SS133T
1SS133T
1SS133T
1SS133T
1SS133T
*
2SD1616
4.7k 
(AEP, UK, CH)
3.9k 
(EXCEPT AEP, UK, CH)
*
R163
1k 
(AEP, UK, CH)
5.6k 
(EXCEPT AEP, UK, CH)
0.001
0.001
1SS133T
1SS133T
470  16V
6-9.
SCHEMATIC  DIAGRAM  – MAIN (3/3)/HEADPHONE Boards –
(Page 20)
(Page 20)
(Page 21)
(Page 27)
(Page 25)
Ver 1.1
HCD-EP50
23
23
D1
D-2
D2
D-2
D3
I-5
D4
C-9
D5
D-4
D6
F-7
D7
H-7
D8
H-5
D10
D-3
D11
D-3
D12
G-6
D16
I-3
D17
G-6
D18
G-6
D19
G-7
D20
G-5
D23
G-5
D24
I-3
D25
E-3
D26
D-8
D29
D-9
D32
B-7
D33
A-7
D35
I-3
IC901
C-1
Q1
A-6
Q2
C-4
Q3
B-6
Q4
B-3
Q5
A-7
Q6
E-3
Q7
F-3
Q8
D-8
Q9
H-6
Q10
D-3
Q11
A-6
Q12
H-6
Q13
E-3
Q14
E-8
Q15
G-6
Q16
F-3
Q17
B-6
Q18
D-9
E   C   B
E   C   B
A   K   A
B   C   E
B   C   E
B   C   E
E   C   B
E   C   B
B   C   E
B   C   E
E   C   B
E   C   B
E   C   B
E     C     B
E   C   B
E   C   B
B   C   E
B   C   E
B  C  E
B  C  E
E  C  B
E  C  B
E   C   B
E   C   B
E   C   B
E   C   B
E   C   B
E   C   B
E   C   B
E   C   B
E   C   B
B   C   E
B   C   E
B   C   E
B   C   E
B   C   E
B   C   E
B   C   E
E   C   B
E   C   B
B   C   E
B   C   E
B   C   E
B   C   E
8
8
1
1
2
6
3
1
2
3
1
1
1
2
2
3
3
2
3
5
5
4
4
5
4
1
5
5
4
4
–1
–2
FM ANT
75
Ω
COAXIAL
EXCEPT
AEP, UK, CH
TP
(FM VT)
CN13
AM ANT
CN12
PHONES
JK401
DISPLAY
BOARD
1
2
F
AM FREQ
STEP
SW1
9kHz
r
10kHz
L
R
SPEAKER
(IMPEDANCE USE 8
Ω
)
CN17
8
1
POWER BOARD
CN601
E
DISPLAY
BOARD
C
DISPLAY
BOARD
D
R179
U4
 FM FRONT-END
1
2
3
5
4
1
2
3
5
4
2
1
3
5
6
4
HPRE101
REC/PB/ERASE
HEAD
9
9
TAPE
MECHANISM
BLOCK
*
 CD
BLOCK
*
 SUPPLIED AS THE
  ASSEMBLED BLOCK
B
A
DISPLAY
BOARD
DISPLAY
BOARD
U2
IC901
U1
U9
U6
U14
U13
U12
U3
8
1
U11
U8
U7
U10
U15
1
3
2
1
3
2
2
3
1
1
2
6
5
4
9
8
7
3
5
1
A
B
C
D
E
F
G
H
I
1
2
3
4
5
6
7
8
9
MAIN BOARD
CF2
T8
AM OSC
T6
AM RF
+
+
–
–
HEADPHONE
BOARD
EXCEPT
AEP, UK, CH
EXCEPT
AEP, UK, CH
EXCEPT
AEP, UK, CH
AEP, UK,
CH
(AEP, UK, CH)
(AEP, UK, CH)
(AEP, UK, CH)
(AEP, UK, CH)
(AEP, UK)
EXCEPT
AEP, UK, CH
(INCLUDED IN MAIN BOARD)
4
5
1
1
2
3
3
K
A
K
A
EC
B
FM OSC
L902
FM
RF
TP
(AM VT)
AM IF
(EXCEPT AEP, UK, CH)
6-10. PRINTED  WIRING  BOARDS  – MAIN/HEADPHONE Boards –
(Page 26)
(Page 24)
(Page 24)
(Page 24)
(Page 24)
(Page 24)
Q19
H-4
Q20
H-3
Q21
G-5
Q22
G-5
Q24
E-5
Q25
E-5
Q26
D-8
Q27
C-9
Q28
C-8
Q29
C-9
Q30
C-7
Q31
B-9
Q32
D-9
Q33
D-9
Q34
B-8
Q35
B-9
Q36
D-9
Q37
H-8
Q38
H-8
Q39
H-8
Q40
H-8
Q41
A-8
Q45
D-8
Q46
D-7
Q47
I-3
Q901
B-1
U1
C-5
U2
B-4
U3
F-4
U6
F-5
U7
H-5
U8
H-4
U9
E-3
U10
H-6
U11
G-4
U12
B-8
U13
C-8
U14
D-8
U15
G-8
Z1
A-6
Z2
H-6
Z4
I-4
Ref. No.
Location
Ref. No.
Location
• Semiconductor Location
Ver 1.1
HCD-EP50
24
24
4
1
3
5
DISPLAY BOARD
MAIN BOARD
CN2
F
MAIN BOARD
CN15
D
MAIN BOARD
CN4
A
16
1
MEGA BASS
SW316
ISS
TUNER
+
PRESET
CD
x
STEREO t MONO
2 t 1
SW318
(MONO STEREO)
Z 
PUSH
OPEN/CLOSE
SW300
1
2
B    C    E
B    C    E
VOLUME
SW311
–
SW310
SW309
X303
ROTARY ENCODER
MUSIC
MENU
TUNER MEM
ENTER
SW305
PLAY MODE
RDS/DIR
SW306
X
SW307
b B
SW308
TAPE
SW303
DISPLAY
TIMER
I/1
D312
CN301
LIQUID CRYSTAL DISPLAY
1
1
1
2
2
3
E    C    B
B    C    E
E    C    B
E    C    B
+
TUNING
M >
. m
SW314
–
SW313
z
D313, SW317
SW301 – 317
(AEP, UK)
MAIN BOARD
CN5
C
MAIN BOARD
CN11
B
1
1
11
7
(INCLUDED IN DISPLAY BOARD)
D701 – 709
(LCD BACK LIGHT)
1
2
2
1
IC302
IC301
1
4
8
5
IC305
3
1
IC304
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
8
EXCEPT
AEP, UK, CH
(AEP, UK)
(AEP, UK)
(AEP, UK)
(AEP, UK)
(AEP, UK)
(AEP, UK)
(EXCEPT AEP, UK, CH)
(AEP, UK, CH)
(AEP, UK)
6-11. PRINTED  WIRING  BOARD  – DISPLAY Board –
(Page 23)
(Page 23)
(Page 23)
(Page 23)
(Page 23)
• Semiconductor
Location
Ref. No.
Location
D301
B-3
D302
B-3
D303
A-2
D304
A-2
D305
B-3
D306
A-2
D307
B-3
D308
B-2
D309
D-6
D310
D-6
D311
E-7
D312
B-7
D313
E-7
D315
C-2
D316
E-3
D317
E-3
D318
E-2
D701
H-6
D702
H-6
D703
H-7
D704
H-7
D705
H-7
D706
H-7
D707
H-8
D708
H-8
D709
H-8
IC301
B-5
IC302
C-3
IC304
E-3
IC305
E-2
Q301
E-7
Q302
D-7
Q303
E-2
Q304
A-7
Q305
E-6
Q306
E-3
X302
F-3
Ver 1.1
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