Sony CMT-EP50LIV / HCD-EP50LIV Service Manual ▷ View online
HCD-EP50LIV
25
25
MAIN BOARD (1/3)
CN11
B
MAIN BOARD (1/3)
CN5
C
MAIN BOARD (3/3)
CN2
F
MAIN BOARD (2/3)
CN15
D
MAIN BOARD (1/3)
CN4
A
1
(AEP, UK)
0
4.2
0
4.9
4.9
4.9
4.9
0
5.4
5.4
5.4
5.4
2
4.3
2.5
4.4
0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
1.7
3.2
4.9
4.9
2.5
2.5
2.5
2.5
4.9
0
0
0
0
0
4.9
1.6
{5.1}
5.1
4.9
2
5.5
5.1
5.1
5.1
5.1
5.1
0
4.9
0 [5.4]
CD LID OPEN : 4.7
CLOSE : 0
5.4 [0]
5.4
5.4
5.4
4.9
4.9
2.5
2.7
4.9
5.5
4.9
4.9
0
PROTECT ON : 5.5
PROTECT OFF : 0
PROTECT ON : 5.2
PROTECT OFF : 0
0
0.8
CASSETTE IN : 5.2
NO CASSETTE : 0
FWD : 5.2
REV : 0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
D701–709
(LCD BACK LIGHT)
TIMER
LED DRIVE
PLAY MODE
ROS/DIR
SW305
CD
TAPE
TUNER
I / 1
TUNER MEM
ENTER
Y
X
x
DSIPLAY
PRESET +
PRESET –
MUSIC MENU
TUNING + M >
TUNING – . m
z
MEGA BASS
IC302
EEPROM
A0
A1
A2
VSS
VCC
TEST
SCL
SDA
Q306
RESET
SWITCH
ROTARY
ENCODER
VOLUME
SWITCHING
X302
REMOTE CONTROL
RECEIVER
IN
GND
OUT
IC304
RESET SIGNAL
GENERATOR
POWER-FAIL
TIMER/ON/OFF
1
1
2
1
11
7
REC. LED+
CD_RESET
ST/BEAT
B+ (BK)
+5V (CPU)
POWER-
LINE
ISS
2 t 1
(MONO STEREO)
STEREO t MONO
z
LED DRIVE
GENERALDOUT
GENERALCLK
I2CDATA
I2CCLOCK
IC
X2
X1
PWRFAIL
CDIN2
CDIN3
CDIN4
CDIN5
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30(SEL6)
SEG31(SEL7)
SEG32
SEG33
SEL10
SEG35
SEL2
SEG32
SEL14
SEL15
GENERALDIN
IC301
SYSTEM CONTROLLER,
LIQUID CRYSTAL
DISPLAY DRIVER
DISPLAY DRIVER
CN301
LIQUID CRYSTAL DISPALY
1
16
Z
PUSH
OPEN/CLOSE
SW300
DISPLAY BOARD
L934SGC/B
L934SGC/B
L934SGC/B
L934SGC/B L934SGC/B
L934SGC/B
L934SGC/B L934SGC/B
L934SGC/B
SEL2215S-CD
10V
0.1
0.1
0.001
0.001
1SS133T
1SS133T
RPM6938
10V
0.1
0.1
0
1SS133T
1SS133T
0.01
0.01
0.01
0.01
0.01
1SS133T
1SS133T
1SS133T
1SS133T
1SS133T
µ
PD78064GF-187-3BA
0.1
10V
10V
0.1
1SS133T
SEL2215S-CD
1SS133T
1SS133T
1SS133T
6-12. SCHEMATIC DIAGRAM – DISPLAY Board –
•
See page 28 for Waveform.
(Page 20)
(Page 20)
(Page 22)
(Page 21)
(Page 20)
HCD-EP50LIV
26
26
POWER BOARD
AC IN
L601
RE601
E C B
B C E
CN601
1
8
T602
POWER
TRANSFORMER
(SUB)
T601
POWER
TRANSFORMER
(MAIN)
E
MAIN BOARD
CN1
3
4
2
1
1
2
3
4
A
B
C
D
E
F
G
1
2
3
4
5
6
7
8
6-13. PRINTED WIRING BOARD – POWER Board –
(Page 23)
• Semiconductor
Location
Ref. No.
Location
D601
B-8
D602
B-8
D603
C-8
D604
C-8
D605
B-6
D606
B-6
D607
C-6
D608
C-6
D612
F-6
D613
F-6
D615
D-5
D616
E-5
D617
E-5
D618
D-5
D621
D-5
Q605
E-7
Q606
E-7
Z601
F-7
HCD-EP50LIV
27
27
MAIN
BOARD
(3/3)
CN1
E
7.9
8
0.7
7.2
0.1
Q605, 606
POWER ON/OFF
RELAY DRIVE
T601
POWER
TRANSFORMER
(MAIN)
T602
POWER
TRANSFORMER
(SUB)
CN601
8P
AC IN
POWER BOARD
0.1
0.1
0.1
0.1
0.1
0.1
25V
0.1
0.1
0.1
1SS133T
1SS133T
50V
F601 4A 125V
F602 2A 125V
0.001
250V
0.1
R625
3.3M
1/2W
3.3M
1/2W
0.1
L601
400
µ
H
6-14. SCHEMATIC DIAGRAM – POWER Board –
(Page 22)
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
HCD-EP50LIV
28
28
3.1 Vp-p
13.5
µ
s
7 Vp-p
13.5
µ
s
2.4 Vp-p
139 ns
•
Waveforms
– MAIN Board –
1
U2
w;
(X2)
4
Q31 (Base) (REC (ISS 1) mode)
2
Q41 (Collector) (REC (ISS 1) mode)
5.1 Vp-p
238 ns
– DISPLAY Board –
1
IC301
7
(X2)
110 Vp-p
12.5
µ
s
2
Q41 (Collector) (REC (ISS 2) mode)
10 Vp-p
13.5
µ
s
3
Q31 (Collector) (REC (ISS 1) mode)
3.1 Vp-p
12.5
µ
s
4
Q31 (Base) (REC (ISS 2) mode)
620 mVp-p
13.5
µ
s
5
Q31 (Emitter) (REC (ISS 1) mode)
620 mVp-p
12.5
µ
s
5
Q31 (Emitter) (REC (ISS 2) mode)
10 Vp-p
12.5
µ
s
3
Q31 (Collector) (REC (ISS 2) mode)
• IC Block Diagrams
– MAIN Board –
– MAIN Board –
U1
LA1837L
U2
LC72131M-TL-M
ALC
BUFF
AM
OSC
AM
MIX
AM
RF. AMP
AGC
IF
DET
S-CURVE
AM/FM
IF-
BUFF
REG
TUNING
DRIVE
GND
VCC
PILOT
DET
VCO
FF
STEREO
DRIVE
STEREO
SW
MUTE
FF
FF
FM
IF
FM
DET
DECODER
ANT 1-BIRDIE
1
2 3
4
5
6
7
9
8
20
19
18
17 16
15
14
11
10
21
22
23
24
25
27
26
29
30
OSC.BUFF
FM-SD.ADJ
AM-OSC
REG
FM-AFC
AM-RF-IN
AGC
MPX-IN
FM-DET OUT
AM-DET OUT
OUT L
OUT R
AMP-IN L
AMP-IN R
AMP OUT R
AMP OUT L
VCO-STOP
STEREO
AM/FM
AM. SD
FM. SD
AM. SD ADJ
IF-BUFF
MUTE
VCC
FM DET
FM-IN
AM-MIX
FM-IF
AM-IF
GND
TUNED
S-METER
FM
S-METER
AM
COMP
SD
AM
12
13
PHASE
DET
28
PHASE
DETECTOR
CHARGE PUMP
SWALLOW COUNTER
1/16, 1/17 4BITS
12BITS
PROGRAMMABLE
DRIVER
UNIVERSAL
COUNTER
REFERENCE
DIVIDER
POWER
ON
RESET
1/2
CCB
INTERFACE
1
2 3 4 5
6 7 8 9
16
15
14
13
12
11
10
17
18
19
20
XOUT
VSS
AOUT
AIN
PD
VDD
FMIN
AMIN
XIN
DO
CL
DI
CE
IFIN
IO1
BO4
BO3
BO2
BO1
IO2
UNLOCK
DETECTOR
DATA SHIFT REGISTER LATCH
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