Sony CMT-EP50LIV / HCD-EP50LIV Service Manual ▷ View online
HCD-EP50LIV
17
17
•
SIGNAL PATH
: RECORD
: TAPE PLAY
: CD PLAY
: TUNER
I2CDATA
INPINENA
SYSTEM CONTROLLER
IC301 (2/3)
EEPROM
IC302
CDDATA
CDCLK
CDRESET
L3
L4
F
(Page 16)
RL-CH
TL-CH
RR-CH
TR-CH
DI
CE
X2
X1
X301
4.194304MHz
7
3
I2CCLK
5
8
CD DOOR SW 19
45
MUTE 49
15
CL
14
LT
4
5
16
12
3
42
16
43
CE
GENERALDOUT
GENERALCLK
47
1
2
GENERALDIN
100
PLLENA
48
SDA
5
SCL
6
10
9
L2
L1
LTOUT
2
11
B
(Page 15)
L
R
1
LVROUT
LVRIN
30
RVROUT
R-CH
R-CH
R-CH
CD-L-IN
CD-R-IN
CD BLOCK
INPUT SELECT SWITCH,
ELECTRICAL VOLUME
U6
R-CH
LINE AMP
U3
SOUND
CONTROL
CIRCUIT
R-CH
R-CH
MEGA BASS
CONTROL SWITCH
Q13
R-CH
PHONES
CN17
CD DO
CD CLK
CD \RESET
+
+
–
–
INPUT SELECT
SWITCH
SELECT SWITCH
SWITCH
LTCOM
4
LT
3
6
LT
2
7
LT
1
8
+9V
R-CH
R-CH
H
(Page 16)
E
(Page 15)
TU-R
TU-L
CLOCK
DA IN
DA IN
CLOCK
DA OUT
STEREO
4
STEREO
TUNED
34
STATION
PLL CE
R-CH
D23
D17
D20
JK401
Z
PUSH
OPEN/CLOSE
SW300
HEADPHONE
AMP
U9
MUTING
Q7
MUTING
Q21
SPEAKER
IMPEDANCE
USE 8
Ω
POWER AMP
U11
• R-ch is omitted due to same as L-ch.
6-3.
BLOCK DIAGRAM – MAIN Section –
HCD-EP50LIV
18
18
SYSTEM CONTROLLER,
LIQUID CRYSTAL DISPLAY DRIVER
IC301 (3/3)
POWER ON/OFF
RELAY DRIVE
Q605, 606
POWER
TRANSFORMER
(MAIN)
T601
LINE
FILTER
L601
AC IN
POWER
TRANSFORMER
(SUB)
T602
RE601
B+ AMP
POWER AMP (U11) B+
D16
D8
D18
D19
CD-EN
TU-EN
D35
RESET 12
PWRFAIL 14
D701 – 709
(LCD BACK LIGHT)
REMOTE CONTROL
RECEIVER
X302
13 REMOTE
FM ON/OFF
CD-EN, TU-EN
ROTARY
ENCODER
X303
ENCODERA
25
ENCODERB
26
SEG30 (SEL6)
90
SEG31 (SEL7)
91
SEG37
97
SEG32
92
SEG29
89
SEG28
88
28
–
32
COM0
–
COM3
KEY1
–
KEY5
51
–
54
SEG0
–
SEG27
60
–
87
SW301 – 317
X303
VOLUME
LIQUID CRYSTAL
DISPLAY
CN301
RECT
D606, 608
RECT
D612, 613,
D616, 618
RECT
D602, 604
+8V
REGULATOR
Q9, 12
8V (CD)
CD BLOCK B+
9V
TAPE DECK SECTION,
LA1837 (U1) B+
M12V
CAPSTAN/REEL MOTOR B+
VT12V
FM CIRCUIT B+
5V (CPU)
SYSTEM CONTROLLER (IC301),
EEPROM (IC302),
94HC4094 (U15) B+
REGULATOR
CONTROL SWITCH
Q15
+12V
REGULATOR
Q47
+5V
REGULATOR
U8
+12V
REGULATOR
U7
+9V
REGULATOR
U10
FM/AM PLL (U2) B+
RESET SIGNAL
GENERATOR
IC304
POWER 50
RESET
SWITCH
Q306
D303
D302
D301
D304
SW1
D307
I
(Page 16)
G
(Page 16)
D
(Page 15)
-1
-2
AM FREQ
STEP
9kHz 10kHz
SWITCHING
SWITCHING
Q301
B+ SWITCH
Q4, 10
B+ SWITCH
Q4, 10
B+ SWITCH
Q19, 20
6-4.
BLOCK DIAGRAM – DISPLAY/POWER SUPPLY Section –
HCD-EP50LIV
19
19
L901
FM FREQUENCY
COVERAGE
L902, TC901
FM TRACKING
3.4
0.8
3.2
3.2
3.2
3.2
3.2
0.8
3.2
3.2
0.047
0.047
0.047
0.047
0.001
1SS133T
FM OSC
L902
FM RF
0.047
0.047
0.001
B. P. F.
1 2 3
0.001
FM OSC
BUFFER
BUFFER
0.001
0.047
0.047
0.047
0.047
0.047
1SS133T
0.047
1
5
4
MAIN
BOARD
(1/3)
G
i
i
i
i
GND
i
OSCO
i
VCC
GND
GND
IF OUTPUT
i
RF INPUT
i
VT
IC901
FM RF AMP/MIX/OSC
TA2132AF
AM RF
IN
FM RF
OUT
AM/FM
SW
FM OSC
AM OSC
AFC
DET
OUT
QUAD
FM RF
IN
RF GND
MIX OUT
AGC
VCC
FM IF
IN
AM IF
IN
GND
(INCLUDED IN MAIN BOARD)
3
IC B/D
6-5.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
6-6.
SCHEMATIC DIAGRAM – FM TUNER Section –
•
See page 28 for IC Block Diagram.
Note on Printed Wiring Board:
•
•
W
: indicates side identified with part number.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
•
H
: adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(
no mark : FM
(
) : AM
{
} : CD PLAY
[
] : TAPE PLAY
<
> : RECORD (ISS 1)
〈〈
〉〉
: RECORD (ISS 2)
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: AM
E
: TAPE PLAY
a
: RECORD
J
: CD PLAY
(Page
20)
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
HCD-EP50LIV
20
20
IC B/D
IC B/D
IC B/D
MAIN BOARD
(2/3)
2
MAIN BOARD
(2/3)
1
NC
MAIN BOARD
(2/3)
3
DSIPLAY
BOARD
A
DSIPLAY
BOARD
B
MAIN BOARD
(3/3)
4
DSIPLAY
BOARD
C
MAIN BOARD
(3/3)
6
MAIN BOARD
(2/3)
5
1
INCLUDED IN
MAIN BOARD
MAIN BOARD
G
T6, TC1
AM TRACKING
T8
AM FREQUENCY
COVERRAGE
AM IF
12.5
11.3
(0)
(0)
12 (0.1)
12.2 (0.1)
0.1 (0.7)
3.6
7.7 (8)
3.6
3.6
5.8
5.8
7.7 (8)
7.7 (8)
1.2
0.5 (0)
0
0
6.6 (3.8)
3.7
4.3
4.3
4.3
4.3
3.3
3.3
2.9
3.9
0 (0.6)
0 (0.6)
2.8 (3.6)
2.8 (3.6)
3.7
3.7
2.1
6.7 (0.1)
0.1
(0.7)
6.7
0
0
0 (2.3)
2.3 (0)
4.9
0.9
0.9
1.3
2.4
2.3
0
0
4.9
4.9
0.1 (4)
0
4.9
4.1
4.9
0.7
0.1
0
0
0
0
0
0
0
0
4.4
4.4
4.4
4.5
4.5
8.1
4.5
0
5
0 {0} [0] <4.6>
0 {0} [4.6]
<0>
0 {4.6}
[0] <0>
4.6 {0} [0] <0>
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
4.6 {0} [0] <0>
0 {4.6} [0] <0>
0 {0} [4.6] <0>
0 {0} [0] <4.6>
7.7
5
0
AM ANT
CN12
FM ANT
75
Ω
COAXIAL
CN13
i
CLOCK
i
DA_IN
i
RR-CH
i
RL-CH
i
TR-CH
i
TL-CH
i
RF INPUT
i
GND
i
GND
i
GND
i
VT
i
VCC
i
IF OUTPUT
i
OSCO
*CD
BLOCK
*SUPPLIED AS THE
ASSEMBLED BLOCK
CN3
9P
Q4, 10
B+ SWITCH
AM RF
U1
FM/AM IF AMP,
AM RF AMP/MIX/OSC,
FM/AM DET, MPX
U1
LA1837
OSC BUFF
FM SD. ADJ
AM-OSC
REG
AM-
RF-IN
AM-AGC
AGC
AM-DET
OUT
FM-DET
OUT
MPX-IN
OUT L
OUT R
AMP-
IN L
AMP-
IN R
AMP-
OUT L
AMP-
OUT R
FM-IN
AM-MIX
FM-IF
AM-IF
GND
TUNED
STEREO
VCC
FM DET
AM. SD
FM. SD
AM. SD
ADJ
IF-BUFF
MUTE
AM/FM
VCO-STOP
Q3
FM/AM BAND
SELECT SWITCH
Q17
STEREO/MONO
SWITCHING
Q1, 11
B+ SWITCH
IFIN
IO2
AMIN
FMIN
VDD
PD
AIN
AOUT
VSS
XOUT
XIN
CE
DI
CL
DO
BO1
BO2
BO3
BO4
IO1
U2
FM/AM PLL
U6
INPUT SELECT SWITCH,
ELECTRICAL VOLUME
U3
LINE AMP
VCC
GND
Q13, 16
MEGA BASS CONTROL SWITCH
Q6, 7
MUTING
CE
VSS
VREF
R1
R2
R3
R4
RT1
RT2
RT3
RT4
RTCOM
RTOUT
RVRIN
RVROUT
LVROUT
LVRIN
LTOUT
LTCOM
LT4
LT3
LT2
LT1
L4
L3
L2
L1
VDD
CL
DI
i
TIMER
i
TU-EN
i
STR
i
POWER-FAIL
i
POWER-LINE
i
REC. LED+
i
BEAT
i
MUTE-LINE
i
R-CH
i
L-CH
CN4
3P
RDS_DA
CN11
7P
DA
CLK
RESET
RESET
DA
CLK
MAIN BOARD
(1/3)
TP
(AM VT)
CN5
11P
11P
0.1
0.1
0.001
0.001
50V
50V
0.022
50V
50V
50V
50V
50V
50V
50V
50V
50V
50V
50V
50V
0.033
0.047
0.0056
0.022
0.047
0.1
50V
0.1
0.1
0.1
0.001
0.001
0.1
0.1
0.1
50V
0.047
0.0056
0.022
0.0047
0.033
50V
50V
0.1
50V
0.047
50V
0.047
0.047
50V
50V
50V
50V
0.0068
0.0047
0.0047
0.0047
0.022
L. P. F.
50V
50V
0.033
16V
0.0068
L. P. F.
0.0047
0.022
0.047
50V
0.047
50V
0.001
0.047
0.001
R239
3.3M
1/2W
3.3M
1/2W
0.047
16V
0.047
0.001
TP
(FM VT)
1SS133T
1SS133T
1SS133T
1SS133T
1SS133T
16V
0.47 50V
0.47 50V
1SS133T
1SS133T
6-7.
SCHEMATIC DIAGRAM – MAIN Board (1/3) –
•
See page 28 for Waveform.
•
See page 28 for IC Block Diagrams.
(Page 19)
(Page 21)
(Page 21)
(Page 21)
(Page 25)
(Page
25)
(Page 22)
(Page
25)
(Page 21)
(Page 22)
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