Block Diagram - Main Section - Sony HCD-EC68P Service Manual

HCD-EC68P/EC78P
6-2.

BLOCK DIAGRAM - MAIN Section -

INPUT SELECTOR,
ELECTRICAL VOLUME
IC602
A
TUNER-L 4 TUNER-L
B
CD-L 6 CD-L
R-CH
J491
8 AUDIO-L
AUDIO IN
2 TC/DMP-L
26 25
CN901
49 50
DMPORT
13
LINE
L+
AMP
11
L- IC770
14
R+ R-CH
12
R- R-CH
6
29 I-USB-TXD/I-DMP-TXD
TXD
5
RXD 31 O-USB-RXD/O-DMP-RXD
7
DET 45 I-DMP-DET/O-USB-RST
LED301
LED DRIVE
I/
28 O-LED-STBY
Q301
STANDBY
REMOTE CONTROL
I-RMC
RECEIVER 9
IC302
SW301, 303 - 308,
(EC78P: UK)
SW309, 310
SW311 - 319
(FRONT PANEL KEYS)
I-KEY1, I-KEY2, I-KEY-WAKEUP/VOL
ROTARY
VOLUME ENCODER
S301
HCD-EC68P/EC78P
OUT-L 19
SEL-L 9
VOL-L 12
LCD301
LIQUID
CRYSTAL
DISPLAY
X301 X302
32.768kHz 6MHz
63, 64, 67 - 89, 94 - 100, 1 59 - 62 14 13 92 93 2
SEG0 - SEG32 COM0 - COM1
SYSTEM CONTROLLER
IC301 (2/2)
O-CD-ON
I-USB-DO/I-DMP-5V-DET 30
O-USB-DI/5V-ON/O-TP-REC-MUTE
I-RST 54
I-HOLD 42
I-P-MONI 36
O-POWER
POWER AMP
IC101
(EC68P/EC78P: UK)
IC102
(EC78P: US, CND)
STANDBY
SWITCH
Q608
(EC78P)
POWER AMP
IC151
(EC78P: UK)
IC152
(EC78P: US, CND)
OVER LOAD
DETECT
Q101, 102
D103
+1.5V
CD +1.5V
REGULATOR
IC201
+3.3V
CD +3.3V
REGULATOR
Q622, 624
+3V
TUNER +3V REGULATOR
Q801
+5V
TUNER +5V
REGULATOR
Q802
+9V
4
DMPORT +5V
RELAY B+
VOLTAGE
DETECT
Q761, 762
34
SYSTEM +3.3V
VOLTAGE
DETECT
Q305, 306
3
26 26
J492
R-CH
PHONES
RY602
RY601
OVER LOAD RELAY
DETECT DRIVE
Q151, 152 Q604
D152
FAN MOTOR
R-CH DRIVE
Q601, 602
D601
PROTECT PROTECT
DETECT DETECT
Q611, 612 Q605, 606
PROTECT
M601
M M
DETECT
(FAN)
Q603
D628
DC DETECT
+9V
Q618
D631
D617
+VH
-VH
+9V
REGULATOR
IC601
+5V
REGULATOR
IC701
D303
+4V
REGULATOR
Q302 - 304
VSTBY
TB602 (EC68P)
+ SPEAKER
IMPEDANCE
L
–
USE 6Ω
+
R-CH
SPEAKER
R
LOW FREQ.
–
IMPEDANCE
USE 8Ω
TB601
+
L
– SPEAKER
HIGH FREQ.
IMPEDANCE
+
R-CH
USE 8Ω
R
–
• R-ch is omitted due to same as L-ch.
• SIGNAL PATH
: FM
: CD PLAY
D602, 606
: AUDIO IN
: DMPORT
• Abbreviation
AUS : Australian
CND : Canadian
PT003 (EC68P)
PT004 (EC78P)
MAIN POWER
TRANSFORMER
RECT
D607 - 610
RY001
(EC68P: US/EC78P)
RY002
(EC68P: AUS)
RECT
D611, 612
(EC78P)
D629, 630
(EC68P)
PT001 (EC68P: US/EC78P)
PT002 (EC68P: AUS)
SUB POWER TRANSFORMER
(AC IN)
RECT
D051, 052
D055
RELAY
DRIVE
Q619