Block Diagram - Main Section - Sony HCD-EC55 Service Manual

HCD-EC55/EC77/GX99
Ver. 1.1
7-3. BLOCK DIAGRAM — MAIN SECTION —
J401
R-CH
AUDIO IN
+9V
+9V
L-CH
R-CH R-CH
B
TU-DO
TU-DI
TUNER
TU-CLK
SECTION
TU-CE
(Page 31)
TU-ANSD
A CD-L
CD-R
R-CH
BD/DRIVER
SECTION
(Page 30)
EXCEPT US,CND
TAPE MECHANISM DECK
BLOCK
S501(1/2)
(REC/PB)
L-CH
S501(2/2)
REC/PB
(REC/PB)
HEAD
R-CH R-CH
L501
BIAS OSC
BIAS
OSC
Q501
Q502
P-SW
VM9V
M
M-SW
HCD-EC55/EC77/GX99
AUDIO SELECTOR
TONE CONTROLLER
IC602
5 AUDIO-L L-OUT 27
SYSTEM CONTROLLER
R-OUT 26 R-CH
6 TUNER-L
IC301(2/2)
4 TAPE-L
CLK 21 3 O-FUNC-CLK
CD-L
7
DATA 22 4 O-FUNC-DATA
REC-L 8
33 I-TU-DO
57 O-TU-DI
56 O-TU-CLK
55 O-TU-CE
39 I-TU-ANSD
14 X1A
X301
32.768kHz
13 X0A
93
X0
X302
5MHz
92
X1
40
I-TP-STATE
SW303- 310
FUCTION
37
I-KEY1
KEY
SW311-318
FUCTION
38
I-KEY2
KEY
SW301,302
FUCTION
41 I-KEY-WAKE
KEY
LED302
STANDBY
28 O-LED-STBY
LED301
(BACK RIGHT)
Q301
LED
45 O-LED
DRIVE
IC302
REMOTE
1 CONTROL 3 2 9 I-RMC
RECEIVER
D303
+ 4 V
µCON +B
42 I-HOLD
Q304,305
Q306
RESET
RESET 54 RESET
SWITCH
S301
VOLUME 48 I-RE-VOL
VOLUME
LCD301
LIQUID CRYSTAL
DISPLAY
63
.
64
.
67
SEG0
89 SEG31
.
94
100
59 COM0
62 COM3
IC101
IC102
POWER
5
11
AMP
(HIGH)
13
OVERLOAD
R-CH
IC101
IC102
POWER
11 5
AMP
(LOW)
13
Q151
OVERLOAD
DET
Q608 R-CH
AMP
CONTROL
D617
D602
+3.3V
Q622
CD POWER
O-CD-ON 49
SWITCH
VM+7V
VM9V
D616
CD
I-P-MONI 36
MONITOR
Q618
O-POWER 1
Q302,303
+3.6V
+4V
REG
32 32
R-CH
TB601
Q151
L
Q604
SP RELAY
DET
DRIVER
RY601
Q101,102
R
AMP
PROTECT
R-CH
J601
TB602
L
RY602
R
Q101,102
R-CH
AMP
PROTECT
D601
Q601,602
M901
FAN
M
+9V
FAN MOTOR
CONTROL
Q603
FAN
MONITOR
D602
Q605,606
AC
MONITOR
TP002 : EC77/GX99
D606
TP003 : EC55
POWER
TRANSFORMER
(MAIN)
Q624
D607,609
S001
+3.3V
REG
+VP
-VP
D619,620
D611,612
IC601
+9V
3 1
REG
RY001:EXCEPT E2,E3,E51,MX,KR,AR,SP,AUS
Q619
RY002:E2,E3,E51,MX,KR,AR,SP,AUS
POWER
RELAY DRIVE
TP001
POWER
TRANSFORMER
D055(1/2)
(SUB)
D055(2/2)
D051,052
J402
PHONES
EC77/GX99
SPEAKER
HIGH FREQ.
IMPEDANCE:
USE 8
GX99
SUBW00FER
OUT
EC77/GX99 EC55
SPEAKER
SPEAKER
LOW FREQ.
IMPEDANCE:
IMPEDANCE:
USE 6
USE 8
E2,E3,E51,SP
VOLTAGE
SELECTOR
• R-CH is omitted due to same as L-CH.
• Signal Path
: TUNER(FM)
: TUNER(AM)
: CD
: AUDIO
: PB (TAPE)
: REC (TAPE)
AC IN