Read Sony HCD-EC50DC / MHC-EC50DC Service Manual online
26
26
HCD-EC50DC
HCD-EC50DC
7-3. BLOCK DIAGRAM — MAIN SECTION —
: TUNER(FM)
: TUNER(AM)
: CD
• Signal Path
: AUX
: PB (TAPE)
: REC (TAPE)
• R-CH is omitted due to same as L-CH.
A
BD/DRIVER
SECTION
(Page 24)
TUNER
SECTION
(Page 25)
(Page 25)
B
BIAS
OSC
Q507
REC/PB
HEAD
BLOCK
TAPE MECHANISM DECK
V2/P82
V1/P81
V0/P80
SYSTEM CONTROLLER
IC701(2/2)
P57/SI1
AUDIO IN
J105
FUCTION
KEY
REMOTE
CONTROL
RECEIVER
IC703
SW702-704,706,709,710,719,721
SW711-716,SW708,720
SW701,705
L-CH
R-CH
R-CH
TU-DO
TU-DI
TU-CLK
TU-ANSD
TU-CE
R-CH
P63/AN3
39
55
56
57
33
L501
SW501(1/3)
(REC/PB)
(REC/PB)
P
P
P
R
R
R
SW501(2/3)
BIAS OSC
VM9V
P64/AN4
40
X1A
14
X0A
13
X701
32.768kHz
X0
93
X1
92
X702
4.19MHz
9
P34/IC0
FUCTION
KEY
FUCTION
KEY
38
41
1
RESET
SWITCH
Q704
54 RSTX
RESET
Q705,706
42
D051,052
RELAY
DRIVE
AC
IN
Q102,108,109
S001
37 P61/AN1
P62/AN2
P65/AN5/INT0
P71/AN9/SC1
P66/AN6/INT1
VM+9V
PB/REC EQ AMP,
FUNCTION CONTROLLER
IC401
A1
19
18
OUT 1
B1
21
PB1P
2
C1
23
13
SD
28
REC 10
R-CH
R-CH
L-CH
P27
POWER
AMP
SEG0
SEG31
59
62
COM0
COM3
LIQUID CRYSTAL
DISPLAY
LCD702
Q244
Q135,136
Q201
Q242,243
Q241
Q133,134,137
CON VCC
CON AVCC
36
P60/ANO
LINE
FILTER
VOLTAGE
SELECTOR
L001
F001
J001
D001
VM+9V
6
1
IC202
2
P25
5
POWER
AMP
LOW
3
8
IC201
7
D702
+9V
REG
IC101
+VP
-VP
1
3
D107-110
D191,192
Q151-154
D111,113
+3.3V
REG
Q191
Q192
AVDD
( +3.3V)
DVDD
( +3.3V)
+3.3V
REG
D156
D154
PA+VCC
M+9V
POWER
MONITOR
Q121,122
Q117-119
Q123
Q117-119
Q123
+3.6V
REG
Q701-703
+17V
+17V
REG
Q113,114
Q120
Q120
1
P24
67
63
64
64
89
94
100
.
.
.
.
46
LED702
LED
DRIVE
Q707
LED701
(BACK LIGHT)
(STANDBY)
P40/LED0 17
LED
DRIVE
Q710,711
P72/AN10/SO1 47
J102
PHONES
R-CH
R-CH
R-CH
L
R
R-CH
J101
SPEAKER
R-CH
CD-R
CD-L
P-SW
M-SW
VM
(+7V)
(+7V)
PT001
POWER
(MAIN)
TRANSFORMER
PT002
POWER
(SUB)
TRANSFORMER
4
SW501(3/3)
(REC/PB)
VOLUME
VOLUME
48 P73/AN11/SI2
SW700
AMP
CONTROL
VOLTAGE
SHIFT
Q115,116
VOLTAGE
SHIFT
Q251-253
GAIN
SWITCH
RELAY
CONTROL
OVERLOAD
AMP
PROTECT
PROTECT
PROTECT
DET
DET
DET
M
RY002
VM+9V
FAN
CONTROL
Q901-Q903
M901
FAN MOTOR
M
RY131
RY002
Q171
RELAY
CONTROL
D901
HP
MUTE
RY001
Q101,103,104
Q105,107
RELAY
CONTROL
Q110-112
DC
DETECT
SWITCH
45
P70/AN8/INT3
+17V
+17V
DC IN
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