Sony HCD-EC50 Service Manual ▷ View online
29
29
HCD-EC50
HCD-EC50
6-12. PRINTED WIRING BOARD — AMP SECTION —
•
See page 17 for Circuit Boards Location.
:Uses unleaded solder.
IC202
MAIN BOARD
CNP201
(Page 23)
B
MAIN BOARD
CNP202
(Page 23)
C
E
E
E
E
E
E
K
A
1
1
5
5
A
AMP BOARD
1-868-536-
11
(11)
(CHASSIS)
1
2
A
B
C
3
4
5
EP201
WH102
WH101
Q242
R244 R243
R247
R223
R225
C211
R241
C205
R219
C209
Q241
R233
JW207
JW206
TH241
JW205
C206
C251
C254
R212
R202
R206
R226
C204
Q202
JW204
R215
R211
R207
R201
R246
C201
C253
R205
R242
R245
Q201
Q244
R227
R253
R217
C207
C252
R209
R251
JW208
R213
R203
R249
JW210
JW211
JW209
Q243
R248
C244
JW201
R231
R236
R235
D241
R232
JW203
JW202
R220
R252
C210
R214
R204
R218
C202
R208
C208
R210
JW213
JW212
R228
R234
R224
R222
R216
C212
C203
R221
• Semiconductor
Location
Ref. No.
Location
D241
B-3
IC202
C-3
Q201
B-2
Q202
B-4
Q241
B-2
Q242
B-2
Q243
B-2
Q244
B-2
30
30
HCD-EC50
HCD-EC50
6-13. SCHEMATIC DIAGRAM — AMP SECTION —
R228
R227
R251
R252
R253
R233
R232
R231
R224
R223
R225
R226
R247
R242
Q243
R248
R249
R246
R243
R245
R244
Q241
D241
Q244
JW202
R207
R208
R212
R214
R216
R215
R213
R211
R218
R220
R219
R217
R203
R205
R206
R204
R222
R221
JW201
R201
R202
C205
C206
R236
R235
C252
C251
C211
Q201
C212
Q202
C244
C203
C204
C201
C202
C254
C253
TH241
R234
R241
R210
C208
R209
C207
C209
C210
Q242
IC202
WH102
WH101
2.2k
2.2k
100
100
10k
10k
220
220
10k
10k
22k
22k
470k
10k
2SC3052F
10k
2.2k
10k
1k
2.2k
100k
2SC3052F
MC2838
2SA1235F
100
100
47k
10k
1k
1k
10k
47k
1k
1k
1k
1k
47k
10k
10k
47k
22k
22k
0
0
100p
100p
0.22
2W
0.22
2W
0.1
50V
50V
0.1
50V
50V
2200p
2SA2026
2200p
2SA2026
0.01
4.7
50V
4.7
50V
220p
220p
2200p
2200p
100K
10k
10k
2.2k
2200p
2.2k
2200p
10p
10p
2SA1235TP
5P
5P
JW
JW
STK432-050
POWER AMP
31
31
HCD-EC50
HCD-EC50
6-14. PRINTED WIRING BOARD — POWER SECTION —
•
See page 17 for Circuit Boards Location.
:Uses unleaded solder.
6-15. SCHEMATIC DIAGRAM — POWER SECTION —
Not Replaceable
Built in Transformer
Built in Transformer
*
*
s
MAIN
BOARD
CNP151
(Page 23)
E
(CHASSIS)
1-868-528-
AC IN
PT BOARD
1
2
A
B
C
D
E
F
3
4
5
6
7
A
A
A
K
K
K
RY001
C051
CNJ151
JW014
C054
C055
R051
R052
C053
C052
D052
D051
W052
L001
T001
T002
PT001
POWER TRANSFORMER
(MAIN)
PT002
POWER TRANSFORMER
(SUB)
ACW001
T001
R052
R051
C052
C054
C055
T002
C51
W052
C053
RY001
PT002
PT001
ACW001
L001
CNJ151
D052
D051
1P TERMINAL
4.7k
4.7k
0.1
25V
25V
0.47
25V
0.47
25V
1P TERMINAL
0.1
50V
50V
WIRE-EARTH
GND
0.47
25V
GSPA-1
8P
MC2838
MC2836
32
32
HCD-EC50
HCD-EC50
•
IC Block Diagrams
IC402 BA5947FM-E2
– BD83S Board –
1
LEVEL SHIFT
MUTING
D
15
16
+
–
+
–
D
D
17
18
D
19
20
VREF
21
22
23
24
25
26
27
28
PREVCC
OPOUT
OUTVREF
CH4CAPA
CH4IN
CH3FIN
CH3RIN
GND
MUTE
POWVCC
CH3OUTF
CH3OUTR
CH4OUTF
CH4OUTR
OPIN
–
2
OPIN+
INTERFACE
14
13
D
12
11
D
10
9
8
7
6
CH2FIN
CH2RIN
GND
5
4
CH1FIN
CH1RIN
VREFIN
POWVCC
CH2OUTR
CH2OUTF
CH1OUTR
CH1OUTF
INTERFACE
D
D
3
SW
INTERFACE
IC401 BD3881FV
– MAIN Board –
28
REC1O
27
REC1N
26
REC2N
25
REC2O
24
INC2
23
INC1
22
INB2
21
INB1
20
INA2
19
INA1
18
OUT1
17
BAS1
16
OUT2
15
BAS2
BASS
BASS
13
CONT
14
VEE
12
VDD
11
TRE2
10
TRE1
TREBLE
TREBLE
7
VOLIN1
8
VOLIN2
9
GND
VOLUME
VOLUME
6
PB1O
LOGIC
CONTROL
5
PB2O
4
PB2N
1
PB1N
2
PB1P
3
PB2P
IC801 LV23003VA
– MAIN Board –
1
AM RF-IN
3
FM-MIX
2
REG
6
VCC1
4
GND1
AM
RF
AM
MIX
AM
DET
AM
IF
FM
DET
FM
IF
SD
FF
VCO
FF
FF
ST
TRIG
STSW
FM
MIX
FM
OSC
AM
OSC
OSC
BUFFER
FM
S-METER
DECODER
PHASE
COMPARATOR
MUTE
PROGRAMMABLE
DIVIDER
REFERENCE
DIVIDER
UNLOCK
DETECTOR
SWALLOW
COUNTER
POWER ON
RESET
DATA SHIFT
REGISTER
LATCH
PHASE
DETECTOE
CHARGE
PUMP
UNIVERSAL
COUNTER
5
AM-MIX
7
AMIF-IN
8
FMIF-IN
9
P-DET
10
P-COMP
11
FM-DET
12
L-OUT
13
R-OUT
14
VSS
FM
RF
36 FM RF-IN
35 GND2
34 FMRF-OUT
33 VCC2
30 BO2
29 BO1
29 BO1
32 FM-OSC
31 AM-OSC
28 A-OUT
27 A-IN
27 A-IN
23 DET-OUT
15
CE
16
DI
17
CL
18
DO
22 MPX-IN
19 XIN
20 XOUT
21 VDD
26 PD
25 AGC
25 AGC
24 AM LOW-CUT
LOW-PASS
FILTER
AGC
IF
BUFFER
PIROT
DET
CCB
I/F
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