Sony CMT-EP50LIV / HCD-EP50LIV Service Manual ▷ View online
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
29
HCD-EP50LIV
RIPPLE FILTER
ALC
14
13
12
1
2
3
11
10
9
AMP. CH2
AMP. CH1
8
4
5
6
7
VCC
RF
ALC IN2
OUT2
PC2
NF2
IN2
GND
ALC CONST
ALC IN1
OUT1
PC1
NF1
IN1
1
2
3
4
5
6
7
8
9
INVERTER
COMPARATER
SW R1
GND
SW P1 CONT
GND
VCC
SW P2 GND
SW R2
+
–
3
6
9
12
15
2
5
8
11
14
1
4
7
10
13
28
25
22
19
16
29
26
23
20
17
30
27
24
21
18
+
–
+
–
–
+
–
–
LATCH
DECODER
CONTROL
SHIFT
REGISTER
–
+
LVROUT
LVRIN
LTOUT
LTCOM
LT4
LT3
LT2
LT1
L4
L3
L2
L1
VDD
CL
DI
RVROUT
RVRIN
RTOUT
RTCOM
RT4
RT3
RT2
RT1
R4
R3
R2
R1
VREF
VSS
CE
U6
LC75392
U12
µ
PC1330HA-NA
U13
AN7312
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